CN207853759U - A kind of booster circuit and electronic equipment - Google Patents
A kind of booster circuit and electronic equipment Download PDFInfo
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- CN207853759U CN207853759U CN201721526182.1U CN201721526182U CN207853759U CN 207853759 U CN207853759 U CN 207853759U CN 201721526182 U CN201721526182 U CN 201721526182U CN 207853759 U CN207853759 U CN 207853759U
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Abstract
It is related to field of circuit technology, more particularly to a kind of booster circuit and electronic equipment, charge pump booster circuit is provided with before Boost circuit to carry out pre-loading to the input voltage of Boost circuit, so that compared with carrying out boosting only with Boost circuit, the input of Boost circuit, the pressure difference of output voltage reduce, so that the loss of Boost circuit reduces；In addition, not including inductive element in charge pump booster circuit, only realized and boosted by capacitive element charge and discharge, high conversion efficiency, loss are low；Therefore, when the amplitude of boosting is larger, the transfer efficiency of entire booster circuit is still higher, loss is still relatively low, avoid booster circuit loss can with boosting amplitude becomes larger and the problem of becoming larger.
Description
Technical Field
The utility model relates to the technical field of circuits, especially, relate to a boost circuit and electronic equipment.
Background
At present, most of portable electronic devices, such as smart phones and tablet computers, use lithium batteries for power supply, and in a circuit system of the electronic device, power supply voltages of some modules are higher than a battery voltage, so that a boost circuit needs to be arranged in the circuit system of the electronic device to support operations of the modules.
Most of Boost circuits in the prior art adopt a Boost circuit, which is a topological structure schematic diagram of the Boost circuit as shown in fig. 1; the circuit comprises an inductor L, capacitors C1 and C2, and switches S1 and S2. The working process of the Boost circuit is divided into two stages: in the first stage, S1 is conducted, S2 is disconnected, L stores energy, and C2 discharges to provide electric energy for a load; in the second phase, S1 is off, S2 is on, and L provides power to the load and charges C2. Assuming that the on-time of S1 is T1 and the off-time is T2, the duty cycle T is T1+ T2, the duty cycle D is T1/T, and the output voltage V _ out is V _ in/1-D, where V _ in is the input voltage.
Fig. 2 is a schematic circuit structure diagram of a specific Boost voltage circuit, where the switch S1 is a MOS (Metal-Oxide-Semiconductor) transistor Q, and the switch S2 is a schottky diode D1, and for a current continuous mode, the loss in the circuit is:
loss of the inductor:wherein, IoIn order to output the current, the current is,is copper loss, Pco isreIron loss; loss of the switch Q:wherein R isDS(on)Is the on-resistance of the switch Q, trAnd tfSwitching times, f, for the on and off of the switch Q, respectivelysFor the switching frequency of the switch Q, QGateIs the equivalent capacitance of the switch Q;
loss of schottky diode D1: pD1＝VDF·Io(ii) a Wherein, VDFIs the forward conduction voltage of schottky diode D1.
As can be seen from V _ out being V _ in/1-D, the larger the difference between the input voltage and the output voltage of the Boost circuit is, that is, the larger the Boost amplitude is, the smaller the value of 1-D is, and then the loss of the inductor and the loss of the switch Q are also increased under the condition that other conditions are not changed; that is, the conventional booster circuit has a problem that the loss of the booster circuit is large when the boosting width is large.
SUMMERY OF THE UTILITY MODEL
The embodiment of the utility model provides a boost circuit and electronic equipment for when the range of stepping up is great, boost circuit's loss is great problem when the boost range that the boost circuit of solving current electronic equipment exists.
The embodiment of the utility model provides a Boost circuit, including charge pump Boost circuit and Boost circuit, wherein:
the charge pump booster circuit is used for boosting the voltage of a set input power supply to a set voltage value and outputting the voltage to the Boost booster circuit;
and the Boost circuit is used for boosting the set voltage value to a set target voltage value.
Preferably, the charge pump boost circuit comprises a charge pump boost sub-circuit;
in the first stage, the first capacitor module is connected in series with the direct current input of any charge pump boosting sub-circuit and discharges to charge the second capacitor module and provide output direct current; in the second stage, the direct current input of any charge pump boosting sub-circuit charges the first capacitor module, and the second capacitor module discharges to provide output direct current; wherein the dc input of any charge pump boosting sub-circuit is the dc output of the set input power supply or a preceding charge pump boosting sub-circuit of any charge pump boosting sub-circuit.
Preferably, the charge pump boost circuit comprises more than two charge pump boost secondary circuits connected in series; wherein any one of the charge pump boost secondary circuits comprises one charge pump boost sub-circuit or more than two parallel charge pump boost sub-circuits.
Preferably, the charge pump boost circuit comprises a charge pump boost secondary circuit; any one of the charge pump boosting secondary circuits comprises more than two parallel charge pump boosting sub-circuits.
Preferably, any one of the charge pump boost sub-circuits further comprises a first switch, a second switch, a third switch, and a fourth switch, wherein:
the input end of the first switch is connected with the input end of the third switch, and the connected terminal is the input end of any charge pump booster sub-circuit; the output end of the first switch is connected with the input end of the second switch and one end of the first capacitor module; the output end of the third switch is connected with the other end of the first capacitor module and the input end of the fourth switch; the output end of the second switch is connected with one end of the second capacitor module, and the connected wiring end is the output end of any charge pump booster sub-circuit; the output end of the fourth switch and the other end of the second capacitor module are grounded;
the charge pump booster sub-circuit is used for turning off the first switch and the fourth switch and turning on the second switch and the third switch in a first stage; in a second stage, the second switch and the third switch are turned off, and the first switch and the fourth switch are turned on.
Further optionally, the boost circuit further includes a controller, configured to send a first control signal to the charge pump boost circuit in a first phase to turn off the first switch and the fourth switch and turn on the second switch and the third switch; and in a second stage, sending a second control signal to the charge pump boosting circuit to turn off the second switch and the third switch and turn on the first switch and the fourth switch.
Further optionally, the any charge pump boost sub-circuit further includes a third capacitor module, one end of the third capacitor module is connected to the input end of the any charge pump boost sub-circuit, and the other end of the third capacitor module is grounded;
and the third capacitor module is used for stabilizing the direct current input of any charge pump boosting sub-circuit.
Preferably, the Boost voltage-boosting circuit comprises one Boost voltage-boosting sub-circuit or more than two parallel Boost voltage-boosting sub-circuits.
Preferably, the Boost circuit further includes a controller, configured to send a third control signal to the Boost circuit according to a rated voltage value of a load connected to the Boost circuit, so that the Boost circuit boosts the set voltage value to the rated voltage value.
Correspondingly, the embodiment of the utility model provides an electronic equipment is still provided, including foretell boost circuit.
Correspondingly, the embodiment of the utility model provides a still provide a Boost method, be applied to Boost circuit, Boost circuit includes charge pump Boost circuit and Boost circuit, the method includes:
controlling the charge pump booster circuit to Boost the voltage of a set input power supply to a set voltage value and outputting the voltage to the Boost circuit;
and controlling the Boost circuit to Boost the set voltage value to a set target voltage value.
Preferably, the charge pump voltage boost circuit comprises a charge pump voltage boost sub-circuit, any charge pump voltage boost sub-circuit comprises a first capacitor module and a second capacitor module, and the control of the charge pump voltage boost circuit to boost the voltage of the set input power supply to the set voltage value is realized by the following steps:
for any charge pump boosting sub-circuit, in a first stage, controlling the first capacitor module to be connected in series with a direct current input of the charge pump boosting sub-circuit and to discharge so as to charge the second capacitor module and provide an output direct current; in the second stage, the direct current input of any charge pump boosting sub-circuit is controlled to charge the first capacitor module, and the second capacitor module discharges to provide output direct current;
wherein the dc input of any charge pump boosting sub-circuit is the dc output of the set input power supply or a preceding charge pump boosting sub-circuit of any charge pump boosting sub-circuit.
Preferably, the controlling the charge pump voltage Boost circuit to Boost the voltage of the set input power supply to the set voltage value and output the boosted voltage value to the Boost circuit specifically includes:
controlling more than two charge pump boosting secondary circuits connected in series to Boost the voltage of a set input power supply to a set voltage value and output the voltage to the Boost circuit; wherein any one of the charge pump boost secondary circuits comprises one charge pump boost sub-circuit or more than two parallel charge pump boost sub-circuits; or,
controlling a charge pump boosting secondary circuit block to Boost the voltage of a set input power supply to a set voltage value and output the voltage to the Boost circuit; any one of the charge pump boosting secondary circuits comprises more than two parallel charge pump boosting sub-circuits.
Preferably, the any charge pump boost sub-circuit further comprises a first switch, a second switch, a third switch and a fourth switch, an input end of the first switch is connected with an input end of the third switch, and a connected terminal is an input end of the any charge pump boost sub-circuit; the output end of the first switch is connected with the input end of the second switch and one end of the first capacitor module; the output end of the third switch is connected with the other end of the first capacitor module and the input end of the fourth switch; the output end of the second switch is connected with one end of the second capacitor module, and the connected wiring end is the output end of any charge pump booster sub-circuit; the output end of the fourth switch and the other end of the second capacitor module are grounded;
the method for controlling the charge pump voltage Boost circuit to Boost the voltage of the set input power supply to a set voltage value and output the voltage to the Boost circuit specifically comprises the following steps:
for any charge pump boosting sub-circuit, in a first stage, the first switch and the fourth switch are controlled to be turned off, and the second switch and the third switch are controlled to be turned on; and in the second stage, the second switch and the third switch are controlled to be turned off, and the first switch and the fourth switch are controlled to be turned on.
Optionally, the controlling the Boost circuit to Boost the set voltage value to the set target voltage value specifically includes:
and controlling one Boost sub-circuit or more than two parallel Boost sub-circuits to Boost the set voltage value to a set target voltage value.
The utility model discloses beneficial effect as follows:
the embodiment of the utility model provides a Boost circuit and electronic equipment, charge pump Boost circuit can step up the voltage of setting for the input power to setting voltage value and export to Boost circuit; the Boost circuit may Boost the set voltage value to a set target voltage value. That is to say, a charge pump booster circuit is arranged in front of the Boost booster circuit to pre-Boost the input voltage of the Boost booster circuit, so that the voltage difference between the input voltage and the output voltage of the Boost booster circuit is reduced compared with the boosting by only adopting the Boost booster circuit, and further the loss of the Boost booster circuit is reduced; in addition, the charge pump booster circuit does not comprise an inductive element, and the boost is realized only by charging and discharging a capacitive element, so that the conversion efficiency is high and the loss is low; therefore, when the boosting amplitude is large, the conversion efficiency of the whole boosting circuit is still high, the loss is still low, and the problem that the loss of the boosting circuit becomes large along with the increase of the boosting amplitude is avoided.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic diagram of a topology of a prior art Boost circuit;
fig. 2 is a schematic diagram of a specific circuit structure of a Boost circuit in the prior art;
fig. 3 is a schematic structural diagram of the boost circuit according to an embodiment of the present invention;
fig. 4(a) is a schematic diagram of an equivalent circuit of a charge pump boost sub-circuit in the first stage according to an embodiment of the present invention;
fig. 4(b) is a schematic diagram of an equivalent circuit of the charge pump boost sub-circuit in the second stage according to the embodiment of the present invention;
fig. 5 is a schematic structural diagram of a charge pump boost sub-circuit according to an embodiment of the present invention;
fig. 6 is a schematic diagram of another structure of the charge pump boost sub-circuit according to the embodiment of the present invention;
fig. 7(a) is a schematic diagram of another equivalent circuit of the charge pump boost sub-circuit in the first stage according to the embodiment of the present invention;
fig. 7(b) is another equivalent circuit diagram of the charge pump boost sub-circuit in the second stage according to the embodiment of the present invention;
fig. 8 is a flowchart illustrating steps of a boosting method according to a second embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in further detail with reference to the accompanying drawings, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
The first embodiment is as follows:
the embodiment of the utility model provides a boost circuit can be applied to electronic equipment such as smart mobile phone, panel computer, intelligent wrist-watch, electronic reader. Specifically, as shown in fig. 3, it is a schematic structural diagram of the Boost circuit in the first embodiment of the present invention, and may include a charge pump Boost circuit 301 and a Boost circuit 302, where:
the charge pump boosting circuit 301 is configured to Boost a voltage of a set input power supply to a set voltage value and output the voltage to the Boost boosting circuit 302;
the Boost circuit 302 may be configured to Boost the set voltage value to a set target voltage value.
That is, the charge pump Boost circuit 301 is arranged in front of the Boost circuit 302 to pre-Boost the input voltage of the Boost circuit 302, so that the voltage difference between the input voltage and the output voltage of the Boost circuit 302 is reduced compared with the Boost performed only by the Boost circuit, and further the loss of the Boost circuit 302 is reduced; in addition, the charge pump booster circuit 301 does not include a sensitive element, and realizes boosting only by charging and discharging of a capacitive element, so that the conversion efficiency is high and the loss is low; therefore, when the boosting amplitude is large, the conversion efficiency of the whole boosting circuit is still high, the loss is still low, and the problem that the loss of the boosting circuit becomes large along with the increase of the boosting amplitude is avoided.
Preferably, the charge pump boost circuit 301 may include a charge pump boost sub-circuit; any charge pump boost sub-circuit comprises a first capacitor module C1 and a second capacitor module C2, which is an equivalent circuit schematic diagram of the any charge pump boost sub-circuit at T1 in a first stage T1 as shown in fig. 4(a), wherein the first capacitor module is connected in series with the dc input of the any charge pump boost sub-circuit and discharges to charge the second capacitor module and provide an output dc; a second stage T2, shown in fig. 4(b), which is an equivalent circuit diagram of the any charge pump boost sub-circuit at T2, where the dc input of the any charge pump boost sub-circuit charges the first capacitor module C1, and the second capacitor module C2 discharges to provide the output dc; wherein the dc input of any charge pump boosting sub-circuit is the dc output of the set input power supply or a preceding charge pump boosting sub-circuit of any charge pump boosting sub-circuit.
Specifically, a set duty cycle T of any charge pump voltage boost sub-circuit is set (which can be flexibly set according to actual conditions), the first stage T1 and the second stage T2 each account for 1/2 of the set duty cycle T, and the charge-discharge duty cycle of the second capacitor module C2 is 50%, so that the voltage value of the second capacitor module C2 is equal to the sum of the voltage value of the dc input of any charge pump voltage boost sub-circuit and the voltage value of the first capacitor module C1, and therefore, the voltage value of the second capacitor module C2 is equal to 2 times of the voltage value of the dc input of any charge pump voltage boost sub-circuit, that is, the output voltage value of any charge pump voltage boost sub-circuit is 2 times of the voltage value of the dc input of any charge pump voltage boost sub-circuit.
Preferably, the setting input power supply may specifically be a battery module in the electronic device, and may also be another functional module that can be used for supplying power in the electronic device, which is not limited in this embodiment.
Also optionally, the first capacitance module C1 may include one capacitor, or may include a plurality of capacitors combined together in series, parallel, or a combination thereof; the second capacitor module C2 may include one capacitor, or may include a plurality of capacitors combined together in a series manner, a parallel manner, or a combination of series and parallel, which is not limited herein.
Preferably, the charge pump boost circuit 301 may include more than two charge pump boost secondary circuits in series; wherein any of the charge pump boost secondary circuits may comprise one charge pump boost sub-circuit or more than two parallel charge pump boost sub-circuits; alternatively, the charge pump boost circuit 301 may comprise a charge pump boost secondary circuit; any one of the charge pump boosting secondary circuits can comprise more than two parallel charge pump boosting sub-circuits.
That is, the charge pump boosting circuit 301 may include only one charge pump boosting sub-circuit, and may be formed by combining a plurality of charge pump boosting sub-circuits in a cascade and/or parallel manner. The charge pump boosting sub-circuits positioned at the same stage form a charge pump boosting secondary circuit, which is used for doubling the output voltage of the previous stage charge pump boosting secondary circuit or the voltage of the set input power supply and outputting the voltage to the next stage or serving as the output of the charge pump boosting circuit 301; the cascading of multiple charge pump boost secondary circuits may allow for a greater magnitude of boost for the charge pump boost circuit 301. The plurality of charge pump boosting sub-circuits connected in parallel in any charge pump boosting secondary circuit can shunt the total current in the boosting circuit, so that the current flowing through each charge pump boosting sub-circuit is small, the loss of equivalent impedance in the charge pump boosting sub-circuits is low, and the loss of the charge pump boosting circuit 301 can be further reduced.
Optionally, as shown in fig. 5, it is a schematic structural diagram of any charge pump boost sub-circuit, which may further include a first switch S1, a second switch S2, a third switch S2 and a fourth switch S4, where:
the input end of the first switch S1 is connected with the input end of the third switch S3, and the connected terminal is the input end of any charge pump booster sub-circuit; the output end of the first switch S1 is connected with the input end of the second switch S2 and one end of the first capacitor module C1; the output end of the third switch S3 is connected with the other end of the first capacitor module C1 and the input end of the fourth switch S4; the output end of the second switch S2 is connected to one end of the second capacitor module C2, and the connected terminal is the output end of any charge pump boost sub-circuit; the output end of the fourth switch S4 and the other end of the second capacitor module C2 are both grounded;
either charge pump boost sub-circuit is operable, during a first phase T1, to turn off the first switch S1 and the fourth switch S4, and turn on the second switch S2 and the third switch S3; at this time, an equivalent circuit diagram of any one of the charge pump boosting sub-circuits is as shown in fig. 4(a) (assuming that the equivalent impedances of the second switch S2 and the third switch S3 are both zero); in a second phase T2, turn off the second switch S2 and the third switch S3, turn on the first switch S1 and the fourth switch S4; at this time, an equivalent circuit diagram of any one of the charge pump boosting sub-circuits is as shown in fig. 4(b) (assuming that the equivalent impedances of the first switch S1 and the fourth switch S4 are both zero).
Preferably, the first switch S1, the second switch S2, the third switch S3 and the fourth switch S4 may be MOS transistors; since the on-resistances of the first switch S1, the second switch S2, the third switch S3 and the fourth switch S4 are very low, the loss and heat generation of any charge pump boost sub-circuit are very small, and the power conversion efficiency is very high; further, the conversion efficiency of the booster circuit and the safety of the electronic device can be further improved. In addition, other types of switching devices may be used for the switches, and the present embodiment is not limited in any way.
Further optionally, as shown in fig. 6, the any charge pump boost sub-circuit may further include a third capacitance module C3, where one end of the third capacitance module C3 is connected to the input terminal of the any charge pump boost sub-circuit, and the other end is grounded;
the third capacitor module C3 may be configured to stabilize the dc input of any of the charge pump boost sub-circuits.
When any charge pump boost sub-circuit further includes a third capacitor module C3, in the first stage T1, the equivalent circuit of any charge pump boost sub-circuit is as shown in fig. 7(a), where R2 and R3 are the on equivalent impedances of the second switch S2 and the third switch S3, respectively; in the second stage T2, the equivalent circuit of any one of the charge pump boosting sub-circuits is shown in fig. 7(b), where R1 and R4 are the on equivalent resistances of the first switch S1 and the fourth switch S4, respectively. The operation principle of the equivalent circuit shown in fig. 7(a) and 7(b) is similar to that of the equivalent circuit shown in fig. 4(a) and 4(b), and the description of this embodiment is omitted here.
Further optionally, the third capacitor module C3 may include one capacitor, or may include a plurality of capacitors combined together in a series manner, a parallel manner, or a combination of series and parallel, which is not limited herein.
It should be noted that, the boost circuit may further include a controller, configured to send a first control signal to the charge pump boost circuit 301 to turn off the first switch S1 and the fourth switch S4 and turn on the second switch S2 and the third switch S3 in a first phase T1; for sending a second control signal to the charge pump voltage boost circuit 301 to turn off the second switch S2 and the third switch S3 and turn on the first switch S1 and the fourth switch S4 in a second phase T2.
Preferably, the Boost voltage Boost circuit 302 includes one Boost voltage Boost sub-circuit or more than two Boost voltage Boost sub-circuits connected in parallel. That is to say, the Boost circuit 302 may also adopt a structure in which more than two Boost sub-circuits are connected in parallel, so as to reduce the current flowing through each path of Boost sub-circuit, and further reduce the loss of the equivalent impedance in the Boost circuit 302. The specific circuit structure of the Boost sub-circuit is similar to that of the prior art, as shown in fig. 1 or fig. 2, and the detailed description of the present embodiment is omitted here.
It should be noted that the set target voltage value may be flexibly set according to a rated voltage value of a load of the Boost circuit, and a specific operating principle of the Boost sub-circuit is similar to that in the prior art, which is not described herein again.
Optionally, the controller may be further configured to send a third control signal to the Boost circuit 302 according to a rated voltage value of a load of the Boost circuit, so that the Boost circuit 302 boosts the set voltage value output by the charge pump Boost circuit 301 to the rated voltage value.
It should be noted that the controller may be implemented by a set function module in an application processor of the electronic device, or may be implemented by a specially configured processor chip, and this embodiment is not limited in any way herein.
To sum up, the embodiment of the present invention provides a voltage Boost circuit, which may include a charge pump voltage Boost circuit and a Boost voltage Boost circuit; the charge pump booster circuit can be used for boosting the voltage of a set input power supply to a set voltage value and outputting the voltage to the Boost booster circuit; the Boost circuit can be used for boosting the set voltage value to a set target voltage value. That is to say, a charge pump booster circuit is arranged in front of the Boost booster circuit to pre-Boost the input voltage of the Boost booster circuit, so that the voltage difference between the input voltage and the output voltage of the Boost booster circuit is reduced compared with the boosting by only adopting the Boost booster circuit, and further the loss of the Boost booster circuit is reduced; in addition, the charge pump booster circuit does not comprise an inductive element, and the boost is realized only by charging and discharging a capacitive element, so that the conversion efficiency is high and the loss is low; therefore, when the boosting amplitude is large, the conversion efficiency of the whole boosting circuit is still high, the loss is still low, and the problem that the loss of the boosting circuit becomes large along with the increase of the boosting amplitude is avoided.
Based on same utility model design, the embodiment of the utility model provides a still provides an electronic equipment, including foretell boost circuit.
Example two:
based on the same concept of the utility model, the second embodiment of the utility model provides a boosting method, which can be applied to the boosting control of a boosting circuit in electronic equipment such as smart phones, tablet computers, smart watches, electronic readers and the like; as shown in fig. 3, the boosting circuit includes a charge pump boosting circuit 301 and a Boost boosting circuit 302; specifically, as shown in fig. 8, which is a flowchart illustrating steps of the boosting method according to the second embodiment of the present invention, the method may include:
step 801: the charge pump boosting circuit 301 is controlled to Boost the voltage of the set input power supply to a set voltage value and output to the Boost boosting circuit 302.
Step 802: and controlling the Boost circuit 302 to Boost the set voltage value to a set target voltage value.
That is, the charge pump Boost circuit 301 is arranged in front of the Boost circuit 302 to pre-Boost the input voltage of the Boost circuit 302, so that the voltage difference between the input voltage and the output voltage of the Boost circuit 302 is reduced compared with the Boost performed only by the Boost circuit, and further the loss of the Boost circuit 302 is reduced; in addition, the charge pump booster circuit 301 does not include a sensitive element, and realizes boosting only by charging and discharging of a capacitive element, so that the conversion efficiency is high and the loss is low; therefore, when the boosting amplitude is large, the conversion efficiency of the whole boosting circuit is still high, the loss is still low, and the problem that the loss of the boosting circuit becomes large along with the increase of the boosting amplitude is avoided.
Preferably, the charge pump boost circuit 301 may include a charge pump boost sub-circuit, any charge pump boost sub-circuit including a first capacitive module C1 and a second capacitive module C2;
the control of the charge pump voltage boost circuit 301 to boost the voltage of the set input power supply to the set voltage value is realized by:
for any charge pump boost sub-circuit, in the first stage, as shown in fig. 4(a), the first capacitor module C1 is controlled to be connected in series with the dc input of any charge pump boost sub-circuit and to be discharged, so as to charge the second capacitor module C2 and provide an output dc current; in the second stage, as shown in fig. 4(b), the dc input of any one of the charge pump boost sub-circuits is controlled to charge the first capacitor module C1, and the second capacitor module C2 is discharged to provide the output dc power; wherein the dc input of any charge pump boosting sub-circuit is the dc output of the set input power supply or a preceding charge pump boosting sub-circuit of any charge pump boosting sub-circuit.
Preferably, step 801 controls the charge pump voltage Boost circuit 301 to Boost the voltage of the set input power supply to a set voltage value and output the voltage to the Boost voltage Boost circuit 302, which may specifically include:
controlling more than two charge pump boosting secondary circuits connected in series to Boost the voltage of a set input power supply to a set voltage value and output the voltage to the Boost circuit 302; wherein any one of the charge pump boost secondary circuits comprises one charge pump boost sub-circuit or more than two parallel charge pump boost sub-circuits; or,
controlling a charge pump boosting secondary circuit block to Boost the voltage of a set input power supply to a set voltage value and output the voltage to the Boost circuit 302; any one of the charge pump boosting secondary circuits comprises more than two parallel charge pump boosting sub-circuits.
That is, the charge pump boosting circuit 301 may include only one charge pump boosting sub-circuit, and may be formed by combining a plurality of charge pump boosting sub-circuits in a cascade and/or parallel manner. The charge pump boosting sub-circuits positioned at the same stage form a charge pump boosting secondary circuit, which is used for doubling the output voltage of the previous stage charge pump boosting secondary circuit or the voltage of the set input power supply and outputting the voltage to the next stage or serving as the output of the charge pump boosting circuit 301; the cascading of multiple charge pump boost secondary circuits may allow for a greater magnitude of boost for the charge pump boost circuit 301. The plurality of charge pump boosting sub-circuits connected in parallel in any charge pump boosting secondary circuit can shunt the total current in the boosting circuit, so that the current flowing through each charge pump boosting sub-circuit is small, the loss of equivalent impedance in the charge pump boosting sub-circuits is low, and the loss of the charge pump boosting circuit 301 can be further reduced.
Further optionally, as shown in fig. 5, the any charge pump boost sub-circuit further includes a first switch S1, a second switch S2, a third switch S3, and a fourth switch S4, an input terminal of the first switch S1 is connected to an input terminal of the third switch S3, and a connected terminal is an input terminal of the any charge pump boost sub-circuit; the output end of the first switch S1 is connected with the input end of the second switch S2 and one end of the first capacitor module C1; the output end of the third switch S3 is connected with the other end of the first capacitor module C1 and the input end of the fourth switch S4; the output end of the second switch S2 is connected to one end of the second capacitor module C2, and the connected terminal is the output end of any charge pump boost sub-circuit; the output end of the fourth switch S4 and the other end of the second capacitor module C2 are both grounded;
accordingly, step 801 controls the charge pump voltage Boost circuit 301 to Boost the voltage of the set input power supply to the set voltage value and output the voltage to the Boost voltage Boost circuit 302, which may specifically include:
for any charge pump boosting sub-circuit, in a first phase, the first switch S1 and the fourth switch S4 are controlled to be turned off, and the second switch S2 and the third switch S3 are controlled to be turned on; in the second phase, the second switch S2 and the third switch S3 are controlled to be turned off, and the first switch S1 and the fourth switch S4 are controlled to be turned on.
Preferably, the first switch S1, the second switch S2, the third switch S3 and the fourth switch S4 may be MOS transistors; since the on-resistances of the first switch S1, the second switch S2, the third switch S3 and the fourth switch S4 are very low, the loss and heat generation of any charge pump boost sub-circuit are very small, and the power conversion efficiency is very high; further, the conversion efficiency of the booster circuit and the safety of the electronic device can be further improved. In addition, other types of switching devices may be used for the switches, and the present embodiment is not limited in any way.
Optionally, the step 802 of controlling the Boost circuit 302 to Boost the set voltage value to the set target voltage value may specifically include:
and controlling one Boost sub-circuit or more than two parallel Boost sub-circuits to Boost the set voltage value to a set target voltage value.
That is to say, the Boost circuit 302 may also adopt a structure in which more than two Boost sub-circuits are connected in parallel, so as to reduce the current flowing through each path of Boost sub-circuit, and further reduce the loss of the equivalent impedance in the Boost circuit 302. The specific circuit structure of the Boost sub-circuit is similar to that of the prior art, as shown in fig. 1 or fig. 2, and the detailed description of the present embodiment is omitted here.
The set target voltage value can be flexibly set according to the rated voltage value of the load of the Boost circuit, the specific control principle of the Boost sub-circuit is similar to that of the prior art, and the detailed description is omitted here.
Also optionally, the controlling the Boost circuit 302 to Boost the set voltage value to the set target voltage value may specifically include:
according to the rated voltage value of the load of the Boost circuit, the Boost circuit 302 is controlled to Boost the set voltage value output by the charge pump Boost circuit 301 to the rated voltage value.
It should be noted that the implementation main body of the boost circuit provided in this embodiment may be a set function module in an application processor of an electronic device, or may be a specially-configured processor chip, and this embodiment is not limited in any way herein.
To sum up, the embodiment of the present invention provides a boosting method applied to a Boost circuit, where the Boost circuit includes a charge pump Boost circuit and a Boost circuit; the charge pump booster circuit can be controlled to Boost the voltage of a set input power supply to a set voltage value and output the voltage to the Boost booster circuit; and controlling the Boost circuit to Boost the set voltage value to a set target voltage value. That is to say, a charge pump booster circuit is arranged in front of the Boost booster circuit to pre-Boost the input voltage of the Boost booster circuit, so that the voltage difference between the input voltage and the output voltage of the Boost booster circuit is reduced compared with the boosting by only adopting the Boost booster circuit, and further the loss of the Boost booster circuit is reduced; in addition, the charge pump booster circuit does not comprise an inductive element, and the boost is realized only by charging and discharging a capacitive element, so that the conversion efficiency is high and the loss is low; therefore, when the boosting amplitude is large, the conversion efficiency of the whole boosting circuit is still high, the loss is still low, and the problem that the loss of the boosting circuit becomes large along with the increase of the boosting amplitude is avoided.
Furthermore, any number of elements in the drawings and description are to be regarded as illustrative in nature and not as restrictive, and any naming is intended to be distinguishing rather than limiting.
While the preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. It is therefore intended that the appended claims be interpreted as including the preferred embodiment and all such alterations and modifications as fall within the scope of the invention.
It will be apparent to those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (9)
1. A Boost circuit comprising a charge pump Boost circuit and a Boost circuit, wherein:
the charge pump booster circuit is used for boosting the voltage of a set input power supply to a set voltage value and outputting the voltage to the Boost booster circuit; the charge pump boost circuit includes a charge pump boost sub-circuit, wherein: in the first stage, the first capacitor module is connected in series with the direct current input of any charge pump boosting sub-circuit and discharges to charge the second capacitor module and provide output direct current; in the second stage, the direct current input of any charge pump boosting sub-circuit charges the first capacitor module, and the second capacitor module discharges to provide output direct current; wherein, the direct current input of any charge pump boosting sub-circuit is the direct current output of the set input power supply or a preceding charge pump boosting sub-circuit of any charge pump boosting sub-circuit; the set working period of any charge pump booster circuit is T, and the first stage and the second stage respectively account for 1/2 of the set working period T;
and the Boost circuit is used for boosting the set voltage value to a set target voltage value.
2. The booster circuit of claim 1,
the charge pump boosting circuit comprises more than two charge pump boosting secondary circuits connected in series; wherein any one of the charge pump boost secondary circuits comprises one charge pump boost sub-circuit or more than two parallel charge pump boost sub-circuits.
3. The booster circuit of claim 1,
the charge pump boost circuit comprises a charge pump boost secondary circuit; any one of the charge pump boosting secondary circuits comprises more than two parallel charge pump boosting sub-circuits.
4. A boost circuit according to any of claims 1 to 3, wherein said any charge pump boost sub-circuit further comprises a first switch, a second switch, a third switch and a fourth switch, wherein:
the input end of the first switch is connected with the input end of the third switch, and the connected terminal is the input end of any charge pump booster sub-circuit; the output end of the first switch is connected with the input end of the second switch and one end of the first capacitor module; the output end of the third switch is connected with the other end of the first capacitor module and the input end of the fourth switch; the output end of the second switch is connected with one end of the second capacitor module, and the connected wiring end is the output end of any charge pump booster sub-circuit; the output end of the fourth switch and the other end of the second capacitor module are grounded;
the charge pump booster sub-circuit is used for turning off the first switch and the fourth switch and turning on the second switch and the third switch in a first stage; in a second stage, the second switch and the third switch are turned off, and the first switch and the fourth switch are turned on.
5. The booster circuit of claim 4, further comprising a controller:
the controller is configured to send a first control signal to the charge pump boost circuit to turn off the first switch and the fourth switch and turn on the second switch and the third switch in a first phase; and in a second stage, sending a second control signal to the charge pump boosting circuit to turn off the second switch and the third switch and turn on the first switch and the fourth switch.
6. The booster circuit of claim 4, wherein the any charge pump booster sub-circuit further comprises a third capacitive module, one end of the third capacitive module being connected to the input terminal of the any charge pump booster sub-circuit, the other end of the third capacitive module being connected to ground;
and the third capacitor module is used for stabilizing the direct current input of any charge pump boosting sub-circuit.
7. The Boost circuit of claim 1, wherein the Boost circuit comprises one Boost sub-circuit or more than two Boost sub-circuits in parallel.
8. The booster circuit of claim 1, further comprising a controller:
the controller is configured to send a third control signal to the Boost voltage boosting circuit according to a rated voltage value of a load connected to the Boost circuit, so that the Boost voltage boosting circuit boosts the set voltage value to the rated voltage value.
9. An electronic device comprising the booster circuit according to any one of claims 1 to 8.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721526182.1U CN207853759U (en) | 2017-11-15 | 2017-11-15 | A kind of booster circuit and electronic equipment |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201721526182.1U CN207853759U (en) | 2017-11-15 | 2017-11-15 | A kind of booster circuit and electronic equipment |
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| CN207853759U true CN207853759U (en) | 2018-09-11 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113394971A (en) * | 2021-06-29 | 2021-09-14 | 合肥市汤诚集成电路设计有限公司 | Charge pump boost control circuit |
| CN114420057A (en) * | 2021-12-28 | 2022-04-29 | 荣耀终端有限公司 | Backlight power supply, display device and electronic equipment |
-
2017
- 2017-11-15 CN CN201721526182.1U patent/CN207853759U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113394971A (en) * | 2021-06-29 | 2021-09-14 | 合肥市汤诚集成电路设计有限公司 | Charge pump boost control circuit |
| CN113394971B (en) * | 2021-06-29 | 2021-12-21 | 合肥市汤诚集成电路设计有限公司 | Charge pump boost control circuit |
| CN114420057A (en) * | 2021-12-28 | 2022-04-29 | 荣耀终端有限公司 | Backlight power supply, display device and electronic equipment |
| WO2023124155A1 (en) * | 2021-12-28 | 2023-07-06 | 荣耀终端有限公司 | Backlight power supply, display apparatus, and electronic device |
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