CN103607117B - DC-to-dc converter - Google Patents
DC-to-dc converter Download PDFInfo
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- CN103607117B CN103607117B CN201310593687.XA CN201310593687A CN103607117B CN 103607117 B CN103607117 B CN 103607117B CN 201310593687 A CN201310593687 A CN 201310593687A CN 103607117 B CN103607117 B CN 103607117B
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Abstract
The present invention relates to a kind of DC-to-dc converter, including: the first switch, second switch, the second electric capacity, the negative feedback control circuit of band energy regenerating；When Enable Pin receives non-enable signal, negative feedback control circuit detects when output voltage is more than threshold voltage, conducting second switch, described second electric capacity is inductive discharge, when output voltage is less than threshold voltage, turn off second switch, first switch turns under the control of the first output of negative feedback control circuit, inductive discharge, battery is charged simultaneously, when negative feedback control circuit detects that inductive current is less than threshold current, turning off the first switch by the first output of negative feedback control circuit, described DC-to-dc converter quits work.Energy on electric capacity is reclaimed by the present invention, promotes energy ecology.
Description
Technical field
The present invention relates to electronic circuit technology field, particularly relate to a kind of DC-to-dc converter.
Background technology
Fig. 1 is the DC-to-dc converter that the present invention is traditional.In FIG, traditional DC-to-dc turns
Parallel operation is usually one-way transmission energy, the most always transmits energy from input power to output loading.In order to save
Saving energy, a lot of systems all use between the DC-to-dc converter quilt in service intermittent mode, i.e. Fig. 1
Formula of having a rest enables and closes (system service intermittent and dormancy), when Enable Pin EN receives enable signal,
Negative feedback control circuit works, and input voltage VIN (such as 5V) is converted to output voltage VO (such as
3V), for being powered circuit offer operating voltage.When Enable Pin EN receives non-enable signal, negative anti-
Feedback control circuit quits work, and output voltage VO is by resistance R2 and R1 or to be powered circuit discharging negative to zero,
Also by being additionally connected to switching output capacitance C2 between VO node and ground node in the design having
Electric charge bleeds off.When EN signal becomes enabling signal again every time, output capacitance C2 is recharged；Often
When secondary EN signal becomes low level, output level C2 is completely discharged.So C2 is repeatedly charged and is put
During electricity, energy is completely wasted.
Summary of the invention
It is an object of the invention to energy after closedown, to one-way transmission in traditional DC-to-dc converter
Amount reclaims.
For achieving the above object, the invention provides a kind of DC-to-dc converter.This converter includes:
Battery, the negative feedback control circuit of band energy regenerating, the first switch, second switch, inductance, the second electricity
Hold；
Described first switch S1 is connected between first end of supply voltage and described inductance L1, and described the
The end that controls of one switch S1 is connected to negative feedback control circuit the first output HDV of band energy regenerating；
Described second switch S2 is connected to the first end and the earth terminal of inductance L1, described second switch S2's
Control end and be connected to negative feedback control circuit the second output LDV of described band energy regenerating；
Second electric capacity is connected between second end of inductance L1 and ground end, in order to provide output voltage；
The negative feedback control circuit of described band energy regenerating, first input end is connected to supply voltage VIN, the
Two inputs are connected to Enable Pin EN；When Enable Pin EN receives non-enable signal, negative feedback control electricity
Road detects when output voltage VO is more than threshold V T D, the negative feedback control circuit of band energy regenerating
Second output LDV conducting second switch S2, described second electric capacity C2 is inductance L1 electric discharge, in output
When voltage VO is less than threshold V T D, turning off described second switch S2, the first switch S1 is in negative-feedback
Turning under the control of the first output HDV of control circuit, inductance L1 discharges, and charges battery simultaneously,
When negative feedback control circuit detects inductance L1 electric current less than threshold current, pass through negative feedback control circuit
First output HDV turn off first switch S1, described DC-to-dc converter quits work.
Preferably, when Enable Pin EN receives enable signal, the negative feedback control of described band energy regenerating
Circuit controls the first switch S1 and on or off of second switch S2 according to feedback voltage.
Preferably, described DC-to-dc converter includes bleeder circuit, detects output voltage VO；
Output voltage VO is connected to the 3rd of the negative feedback control circuit of described band energy regenerating by bleeder circuit
Input FB, the negative feedback control circuit of the most described band energy regenerating is to output voltage VO and threshold value electricity
Pressure VTD compares.
Preferably, described DC-to-dc converter also includes: be powered circuit, and described second electric capacity C2
Parallel connection, when Enable Pin EN receives enable signal, described line voltage VIN be described in be powered circuit and carry
For operating voltage.
Preferably, the four-input terminal LX of the negative feedback control circuit of described band energy regenerating is connected to inductance
L1 the first end.
Preferably, the negative feedback control circuit of described band energy regenerating includes error amplifier, PWM comparator
PWMC and logic control；First reference voltage REF is connected to an input of error amplifier EA, output
Voltage VO is connected to the another input of error amplifier EA, and the output of error amplifier EA is connected to
The normal phase input end of PWM comparator PWMC, pulse voltage RAMP is connected to the anti-of PWM comparator PWMC
Phase input, the output of PWM comparator PWMC is connected to the input of described logic control, through described
Logic control produces HDP signal and LDP signal；When Enable Pin EN receives enable signal, described band
The negative feedback control circuit of energy regenerating allows described HDP signal and LDP signal to control negative-feedback control respectively
The first output HDV and the second output LDV of circuit processed.
Preferably, the negative feedback control circuit of described band energy regenerating includes the first comparator Comp1, to defeated
Go out voltage VO and threshold V T D to compare；When Enable Pin EN receives non-enable signal, as
Really output voltage VO output signal AH more than threshold V T D, the first comparator Comp1 controls band energy
Second output LDV of the negative feedback control circuit that amount reclaims so that second switch S2 turns on；
When Enable Pin EN receives non-enable signal, if output voltage VO is less than threshold V T D,
The second of the negative feedback control circuit of the output signal AH control band energy regenerating of the first comparator Comp1 is defeated
Go out to hold LDV so that second switch S2 turns off.
Preferably, the negative feedback control circuit of band energy regenerating also includes the second d type flip flop ffdf2, second
D type flip flop ffdf2 resets according to output signal AH of the first comparator Comp1；When Enable Pin EN
When receiving non-enable signal, if output voltage VO is less than threshold V T D, the second d type flip flop ffdf2
Output signal HHA control the first output HDV of negative feedback control circuit of band energy regenerating so that the
One switch S1 conducting.
Preferably, the negative feedback control circuit of band energy regenerating also includes the first d type flip flop ffdf1 and
Two comparator Comp2, the first d type flip flop ffdf1 is according to output signal AH of the first comparator Comp1
Resetting, inductance L1 electric current and threshold current are compared by the second comparator Comp2；Work as Enable Pin
When EN receives non-enable signal, if inductance L1 electric current is less than threshold current, the second comparator Comp2
Output signal IR and output signal HHE of the first d type flip flop ffdf1 control the negative anti-of band energy regenerating
The first input end HDV of feedback control circuit so that the first switch S1 turns off.
Preferably, the negative feedback control circuit of band energy regenerating includes: first and door AND1, second and door
AND2, the 3rd with door AND3, the 4th and door AND4, the first d type flip flop ffdf1, first or door OR1,
Second or door OR2, the 3rd or door OR3, phase inverter INV1, the first driver DRV1, the second driver
DRV2；
Supply voltage VIN and the second reference voltage VOS is connected to the positive of described second comparator Comp2
Input, inductance L1 voltage is connected to the inverting input of the second comparator Comp2, the second comparator
Comp2 output is connected to one end of the 3rd and door AND3, and the output of the first d type flip flop ffdf1 is even
Being connected to the another end of the 3rd and door AND3, the output of the 3rd and door AND3 is connected to the 3rd or door OR3
One end, Enable Pin EN of the first d type flip flop ffdf1 is connected to the another end of the 3rd or door OR3,
The output of three or door OR3 is connected to the reset terminal of the second d type flip flop ffdf2, the second d type flip flop ffdf2
Output be connected to first or one end of door OR1；
Control the HDP signal of logic to be input to the 4th and be connected to the with door AND4 one end, Enable Pin EN
The another end of four and door AND4, the described 4th is connected to the another end of first or door OR1 with door AND4,
Described first or door OR1, after the first driver DRV1, is connected to the negative feedback control of band energy regenerating
First output HDV of circuit；
Output voltage VO is connected to the normal phase input end of the first comparator Comp1, and threshold V T D connects
To the inverting input of the first comparator Comp1, the output of described first comparator Comp1 is connected to
One end of first and door AND1, Enable Pin EN inverted device INV1 is connected to first with door AND1 again
One end；First is connected to second or one end of door OR2 with the output of door AND1；
The LDP signal controlling logic is input to one end of second and door AND2, and Enable Pin EN is connected to the
The another end of two and door AND2, described second is connected to the another end of second or door OR2 with door AND2,
Described second or door OR2 after the second driver DRV2, is connected to the negative feedback control electricity of band energy regenerating
The second output LDV on road.
It is an object of the invention to reclaim, to save energy the energy on the second electric capacity and charged moiety.Right
For the DC-to-dc converter of frequent starting and closedown, it is stored in after closedown in output capacitance every time
Energy reclaim, contribute to raising efficiency.It is capacitive load (load equivalent for being powered circuit
For capacitance characteristic) for, energy regenerating better.
Accompanying drawing explanation
For the technical scheme being illustrated more clearly that in the embodiment of the present invention, below will be to embodiment or existing
In having technology to describe, the required accompanying drawing used is briefly described, it should be apparent that, in describing below
Accompanying drawing be only some embodiments of the present invention, for those of ordinary skill in the art, not
On the premise of paying creative work, it is also possible to obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the DC-to-dc converter that the present invention is traditional；
Fig. 2 is the DC-to-dc converter of the negative feedback control circuit of embodiment of the present invention band energy regenerating；
Fig. 3 is the negative feedback control circuit implementation of band energy regenerating in the embodiment of the present invention.
Detailed description of the invention
Below by drawings and Examples, technical scheme is described in further detail.
For input power be rechargeable battery (such as lithium battery or Ni-MH battery) or other can store energy
During unit (the such as super capacitor) measured, the present invention can realize will when DC-to-dc converter is closed
Energetic portions on second electric capacity C2 reclaims, and charges input power.Connect with Enable Pin EN separately below
The enable signal received is high level, and non-enable signal is to do with explanation as a example by low level.
Fig. 2 is the DC-to-dc converter of the negative feedback control circuit of embodiment of the present invention band energy regenerating.
In Fig. 2, DC-to-dc converter includes: battery, the negative feedback control circuit of band energy regenerating, first
Switch S1, second switch S2, inductance L1 and the second electric capacity C2 of inductance L1 series connection.Straight with traditional
The difference of stream-direct current transducer is: use the negative feedback control circuit of band energy regenerating to instead of traditional bearing
Feedback control circuit.
In the embodiment of the present invention, the first switch S1 white silk is connected between supply voltage and first end of inductance L1,
The end that controls of the first switch S1 is connected to negative feedback control circuit the first output HDV of band energy regenerating；
Second switch S2 is connected to the first end and the earth terminal of inductance L1, and the control end of second switch S2 is connected to
Negative feedback control circuit the second output LDV of described band energy regenerating；Second electric capacity is connected to inductance L1
The second end and ground end between, in order to provide output voltage, the negative feedback control circuit of band energy regenerating,
First input end is connected to supply voltage VIN, and the second input is connected to Enable Pin EN.
Further, operation principle is as follows:
When EN is high level, the negative feedback control circuit of band energy regenerating performs and traditional direct current-straight
Stream transformer has the first output HDV of identical function, the i.e. negative feedback control circuit of band energy regenerating
Conducting the first switch S1, is that the second electric capacity C2 charges and carries for being powered circuit by supply voltage VIN
For operating voltage, controlled the conducting of the first switch S1, second switch by the feedback voltage of feedback loop
S2 turns off or the shutoff of the first switch S1, the conducting of second switch S2 so that DC-to-dc converter
Output voltage VO is constant voltage.
When Enable Pin EN becomes low level from high level, negative feedback control circuit detects bleeder circuit
Voltage is more than threshold V T D, and now, the second output LDV conducting second of negative feedback control circuit is opened
Closing S2, in this stage, the energy on the second electric capacity C2 is transferred on inductance L1, until output electricity
Pressure V0 is reduced to threshold V T D(generally higher than 0V, but the voltage of a little higher than 0V) below time,
Control second switch S2 turn off, first switch S1 band energy regenerating negative feedback control circuit first
Turning under the control of output HDV signal, inductance L1 starts to release energy, the battery BAT to input
It is charged, until the energy of inductance L1 closes the first switch S1 after fully being discharged.Now, inductance
When L1 energy is detected that inductance both end voltage is less than threshold current by fully release i.e. negative feedback control circuit,
By fully release, (negative feedback control circuit of band energy regenerating detects that inductive current is soon to the energy of inductance
From VO flow to the direction of VIN change into flow to the direction of VO from VIN).Hereafter, DC-to-dc conversion
Device quits work the most completely.
In prior art, general Enable Pin EN after high level becomes low level, DC-to-dc converter
Quit work the most immediately.And in embodiments of the present invention, when Enable Pin EN is after high level becomes low level,
DC-to-dc converter also to work a period of time according to above-mentioned operation principle, in order to by output capacitance C2
On energy regenerating, and the battery of input is charged.
In an optional embodiment, threshold current is equal to VOS/RONBusiness；VOS is voltage source VOS
Magnitude of voltage, namely the second reference voltage, RONIt it is the conducting resistance of the first switch S1.
Alternatively, DC-to-dc converter includes bleeder circuit, detects output voltage VO；Defeated
Go out the 3rd input that voltage VO is connected to the negative feedback control circuit of described band energy regenerating by bleeder circuit
End FB, the negative feedback control circuit of the most described band energy regenerating is to output voltage VO and threshold V T D
Compare.
Wherein, bleeder circuit includes the first resistance R1 and the second resistance R2, through bleeder circuit, output voltage
Dividing potential drop be:
FB=VO*(R2+R1)/R1
Alternatively, DC-to-dc converter also includes: be powered circuit, and the second electric capacity C2 is in parallel,
When Enable Pin EN is high electricity, line voltage VIN provides operating voltage for the described circuit that is powered.
Alternatively, the four-input terminal LX of the negative feedback control circuit of band energy regenerating is connected to inductance L1
First end.
Fig. 3 describes according to the one of the negative feedback control circuit of band energy regenerating in Fig. 2 of the present invention real
Execute mode.In Fig. 3, the negative feedback control circuit of band energy regenerating includes: the first comparator Comp1,
Two comparator Comp2, first and door AND1, second and door AND2, the 3rd and door AND3, the 4th and door
AND4, the first d type flip flop ffdf1, the second d type flip flop ffdf2, first or door OR1, second or door
OR2, the 3rd or door OR3, the first driver DRV1, the second driver DRV2, phase inverter INV1, mistake
Difference amplifier EA, PWM comparator PWMC and logic control.
Specifically, supply voltage VIN and the second reference voltage VOS input extremely described second comparator Comp2
Normal phase input end (electric current of supply voltage VIN and the second reference voltage VOS end is threshold current),
Inductance L1 voltage is connected to the inverting input of the second comparator Comp2, the second comparator Comp2 output
End be connected to the 3rd with one end of door AND3, the output of the first d type flip flop ffdf1 be connected to the 3rd with
The another end of door AND3, the 3rd is connected to the 3rd or one end of door OR3 with the output of door, and a D touches
Enable Pin EN sending out device ffdf1 is connected to the another end of the 3rd or door OR3, the 3rd or the output of door OR3
End is connected to the reset terminal of the second d type flip flop ffdf2, and the output of the second d type flip flop ffdf2 connects
To first or one end of door OR1；First d type flip flop and the second d type flip flop d end all access power supply
Voltage VIN(high level is effective)；
Control the HDP signal of logic to be input to the 4th and be connected to the with door AND4 one end, Enable Pin EN
The another end of four and door AND4, the described 4th is connected to the another end of first or door OR1 with door AND4,
First or door OR1, after the first driver DRV1, is connected to the negative feedback control circuit of band energy regenerating
The first output HDV；
Output voltage VO is connected to the normal phase input end of the first comparator Comp1, and threshold V T D connects
To the inverting input of the first comparator Comp1, the output of the first comparator Comp1 is connected to first
With one end of door AND1, Enable Pin EN inverted device INV1 is connected to the another end of first and door AND1；
First is connected to second or one end of door OR2 with the output of door AND1；
The LDP signal controlling logic is input to one end of second and door AND2, and Enable Pin EN is connected to the
The another end of two and door AND2, described second is connected to the another end of second or door OR2 with door AND2,
Described second or door OR2 after the second driver DRV2, is connected to the negative feedback control electricity of band energy regenerating
The second output LDV on road.
Wherein, the first reference voltage REF is connected to the normal phase input end of error amplifier EA, output voltage
VO is connected to the inverting input of error amplifier EA, and the output of error amplifier EA is connected to PWM
The normal phase input end of comparator PWMC, pulse voltage RAMP is connected to the anti-phase defeated of PWM comparator PWMC
Entering end, the output of PWM comparator PWMC is connected to the input of logic control, produces through logic control
HDP signal and LDP signal.
Further, operation principle is as follows:
When Enable Pin EN is high level, the HDP signal that logic control produces makes the 4th with door AND4's
Output HDA signal is high level, is high level through the first or door OR1 HDD signal produced, this HDD
High level signal is after the first driver DRV1, and conducting first switchs S1, makes the negative-feedback of band energy regenerating
Control circuit work such as Conventional negative feedback controller, controls the first switch S1 and second by feedback voltage and opens
Closing the on or off of S2, the second electric capacity C2 is electrically charged, and controls DC-to-dc converter output voltage VO
For constant voltage.
When Enable Pin EN is low level, if output voltage VO is more than threshold V T D(generally height
In 0V, but the voltage of a little higher than 0V), output signal AH of the first comparator Comp1 is high level,
Input together with the high level signal ENB produced with inverted device INV1 to first and door AND1, first and door
The signal LH that AND1 produces is high level, after the second or door OR2 and second driver DRV2, controls
Second output LDV of the negative feedback control circuit with energy regenerating so that second switch S2 turns on, this
Time the second electric capacity C2 on the electric charge of storage flow to ground through inductance L1 and second switch S2, to inductance L1
Carry out energy storage.
If output voltage VO such as can be designed as 0.1V less than threshold V T D(), first compares
Output signal AH of device Comp1 is low level, and the high level signal ENB that inverted device INV1 produces
Input together to first with door AND1, the first signal LH produced with door AND1 is low level, through second or
After door OR2 and the second driver DRV2, control the second output of the negative feedback control circuit of band energy regenerating
End LDV, controls second switch S2 and turns off, and now, the energy storage to inductance L1 terminates.
Then, the first d type flip flop ffdf1 and the second d type flip flop ffdf2 is that trailing edge triggers, first
When output signal AH of comparator Comp1 is low level, produce a trailing edge, the first d type flip flop ffdf1
High level will be become with output signal HHE and the HHA of the second d type flip flop ffdf2, cause through first
Or output signal HDD of door OR1 becomes high level, the HDV of the first driver DRV1 output is high level,
Controlling the first switch S1 conducting, inductance L1 starts to release energy, and its sense of current is from output voltage VO
Node flows to the node of input supply voltage VIN, is charged battery BAT.
Owing to switch S1 conducting exists conducting resistance, when electric current is flowed to supply voltage VIN by inductance L1,
Inductance L1 both end voltage is higher than supply voltage VIN, along with the energy of inductance L1 has gradually been released, its
Electric current declines close to 0, when its electric current drops to threshold current (VOS/RON, VOS in figure 3 it was shown that
I.e. second reference voltage, RONIt is the conducting resistance of the first switch S1) time, the second comparator is judged electricity
When sense L1 electric current is less than threshold current, output signal IR of the second comparator Comp2 is high level, warp
Crossing the 3rd with output signal IRT of door AND3 is high level, through the 3rd or output signal RST2 of door OR3
For high level, the output HHA of the second d type flip flop ffdf2 that high level resets is reset to low level,
Owing to EN is low level, the output HDA signal through the 4th Yu door AND4 is low level so that first
Switch S1 turns off, and hereafter, DC-to-dc converter is just completely in out-of-work state.
Compared with traditional DC-to-dc converter, the present embodiment is receiving its enable signal EN from high electricity
Putting down after becoming low level, DC-to-dc converter can many one switch periods of work (first second switch S2
Conducting, then the first switch S1 conducting), and traditional DC-to-dc converter show as first open
Close S1 and second switch S2 to immediately turn off, quit work.
To sum up, the energy being stored in output capacitance after closing reclaims, and contributes to raising efficiency.
For being powered circuit and being capacitive load (load equivalent is capacitance characteristic), the effect of energy regenerating
More preferably.
Above-described detailed description of the invention, is carried out the purpose of the present invention, technical scheme and beneficial effect
Further describe, be it should be understood that the foregoing is only the present invention detailed description of the invention and
, the protection domain being not intended to limit the present invention, all within the spirit and principles in the present invention, done
Any modification, equivalent substitution and improvement etc., should be included within the scope of the present invention.
Claims (10)
1. a DC-to-dc converter, it is characterised in that described DC-to-dc converter includes: electricity
Pond, the negative feedback control circuit of band energy regenerating, the first switch (S1), second switch (S2), electricity
Sense (L1), the second electric capacity (C2)；
Described first switch (S1) is connected between the first end of supply voltage and described inductance (L1),
The control end of described first switch (S1) is connected to the negative feedback control circuit first of band energy regenerating and exports
End (HDV)；
Described second switch (S2) is connected to the first end and the earth terminal of inductance (L1), and described second opens
The end that controls closing (S2) is connected to the negative feedback control circuit the second output (LDV) of described band energy regenerating；
Second electric capacity is connected between the second end of inductance (L1) and ground end, in order to provide output voltage；
The negative feedback control circuit of described band energy regenerating, first input end is connected to supply voltage (VIN),
Second input is connected to Enable Pin (EN)；When Enable Pin (EN) receives non-enable signal, band
When the negative feedback control circuit of energy regenerating detects output voltage (VO) more than threshold voltage (VTD),
Second output (LDV) conducting second switch (S2) of the negative feedback control circuit with energy regenerating, institute
Stating the second electric capacity (C2) is inductance (L1) electric discharge, at output voltage (VO) less than threshold voltage (VTD)
Time, turning off described second switch (S2), the first switch (S1) is at the negative feedback control of band energy regenerating
Turning under the control of first output (HDV) of circuit, inductance (L1) discharges, and charges battery simultaneously,
When the negative feedback control circuit of band energy regenerating detects inductance (L1) electric current less than threshold current, logical
First output (HDV) of the negative feedback control circuit crossing band energy regenerating turns off the first switch (S1),
Described DC-to-dc converter quits work.
2. DC-to-dc converter as claimed in claim 1, it is characterised in that as Enable Pin (EN)
When receiving enable signal, the negative feedback control circuit of described band energy regenerating controls the according to feedback voltage
One switch (S1) and the on or off of second switch (S2).
3. DC-to-dc converter as claimed in claim 1, it is characterised in that described DC-to-dc
Converter includes bleeder circuit, detects output voltage (VO)；Output voltage (VO) is by dividing
Volt circuit is connected to the 3rd input (FB) of the negative feedback control circuit of described band energy regenerating, thus
Output voltage (VO) and threshold voltage (VTD) are carried out by the negative feedback control circuit of described band energy regenerating
Relatively.
4. DC-to-dc converter as claimed in claim 1, it is characterised in that described DC-to-dc
Converter also includes: be powered circuit, and described second electric capacity (C2) is in parallel, as Enable Pin (EN)
When receiving enable signal, described supply voltage (VIN) provides operating voltage for the described circuit that is powered.
5. DC-to-dc converter as claimed in claim 1, it is characterised in that described band energy returns
The four-input terminal (LX) of the negative feedback control circuit received is connected to inductance (L1) the first end.
6. DC-to-dc converter as claimed in claim 1, it is characterised in that described band energy returns
The negative feedback control circuit received includes error amplifier, PWM comparator (PWMC) and logic control；First
Reference voltage (REF) is connected to an input of error amplifier (EA), and output voltage (VO) connects
To the another input of error amplifier (EA), the output of error amplifier (EA) is connected to PWM
The normal phase input end of comparator (PWMC), pulse voltage (RAMP) is connected to PWM comparator (PWMC)
Inverting input, the output of PWM comparator (PWMC) is connected to the input of described logic control,
The first (HDP) signal and second (LDP) signal is produced through described logic control；When Enable Pin (EN) connects
When receiving enable signal, the negative feedback control circuit of described band energy regenerating allows described first (HDP) signal
First output (HDV) of the negative feedback control circuit of band energy regenerating is controlled respectively with second (LDP) signal
With the second output (LDV).
7. DC-to-dc converter as claimed in claim 6, it is characterised in that described band energy returns
The negative feedback control circuit received includes the first comparator (Comp1), to output voltage (VO) and threshold voltage
(VTD) compare；When Enable Pin (EN) receives non-enable signal, if output voltage (VO)
More than threshold voltage (VTD), the output signal (AH) of the first comparator (Comp1) controls band energy and returns
Second output (LDV) of the negative feedback control circuit received so that second switch (S2) turns on；
When Enable Pin (EN) receives non-enable signal, if output voltage (VO) is less than threshold voltage
(VTD), the output signal (AH) of the first comparator (Comp1) controls the negative-feedback control of band energy regenerating
Second output (LDV) of circuit processed so that second switch (S2) turns off.
8. DC-to-dc converter as claimed in claim 7, it is characterised in that described band energy returns
The negative feedback control circuit received also includes the second d type flip flop (ffdf2), the second d type flip flop (ffdf2)
Output signal (AH) according to the first comparator (Comp1) resets；When Enable Pin (EN) receives
During to non-enable signal, if output voltage (VO) is less than threshold voltage (VTD), the second d type flip flop
(ffdf2) output signal (HHA) controls the first output of the negative feedback control circuit of band energy regenerating
(HDV) so that the first switch (S1) conducting.
9. DC-to-dc converter as claimed in claim 7, it is characterised in that described band energy returns
The negative feedback control circuit received also includes the first d type flip flop (ffdf1) and the second comparator (Comp2),
First d type flip flop (ffdf1) resets according to the output signal (AH) of the first comparator (Comp1),
Inductance (L1) electric current and threshold current are compared by the second comparator (Comp2)；As Enable Pin (EN)
When receiving non-enable signal, if inductance (L1) electric current is less than threshold current, the second comparator (Comp2)
Output signal (IR) and output signal HHE of the first d type flip flop (ffdf1) control band energy regenerating
The first input end (HDV) of negative feedback control circuit so that the first switch (S1) turns off.
10. DC-to-dc converter as claimed in claim 9, it is characterised in that described band energy returns
Receive negative feedback control circuit include: first with door (AND1), second with door (AND2), the 3rd with
Door (AND3), the 4th and door (AND4), the first d type flip flop (ffdf1), first or door (OR1),
Second or door (OR2), the 3rd or door (OR3), phase inverter (INV1), the first driver (DRV1),
Second driver (DRV2)；
Supply voltage (VIN) and the second reference voltage (VOS) are connected to described second comparator (Comp2)
Normal phase input end, inductance (L1) voltage is connected to the inverting input of the second comparator (Comp2),
Second comparator (Comp2) output is connected to one end of the 3rd and door (AND3), the first d type flip flop
(ffdf1) output is connected to the another end of the 3rd and door (AND3), the 3rd and the output company of door
Being connected to the 3rd or one end of door (OR3), the Enable Pin (EN) of the first d type flip flop (ffdf1) connects
To the 3rd or the another end of door (OR3), the 3rd or the output of door (OR3) be connected to the 2nd D and trigger
The reset terminal of device (ffdf2), the output of the second d type flip flop (ffdf2) is connected to first or door (OR1)
One end；
First (HDP) signal of logic control be input to the 4th with door (AND4) one end, Enable Pin (EN)
Be connected to the another end of the 4th and door (AND4), the described 4th with door (AND4) be connected to first or
The another end of door (OR1), described first or door (OR1) after the first driver (DRV1), even
It is connected to first output (HDV) of the negative feedback control circuit of band energy regenerating；
Output voltage (VO) is connected to the normal phase input end of the first comparator (Comp1), threshold voltage (VTD)
It is connected to the inverting input of the first comparator (Comp1), described first comparator (Comp1) defeated
Going out end and be connected to one end of first and door (AND1), Enable Pin (EN) inverted device (INV1) connects
Another end to first Yu door (AND1)；First is connected to second or door with the output of door (AND1)
(OR2) one end；
Second (LDP) signal of logic control is input to one end of second and door (AND2), Enable Pin (EN)
Be connected to the another end of second and door (AND2), described second with door (AND2) be connected to second or
Door (OR2) another end, described second or door (OR2) after the second driver (DRV2), connect
The second output (LDV) to the negative feedback control circuit of band energy regenerating.
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| CN201310593687.XA CN103607117B (en) | 2013-11-21 | 2013-11-21 | DC-to-dc converter |
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| CN201310593687.XA CN103607117B (en) | 2013-11-21 | 2013-11-21 | DC-to-dc converter |
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| CN104393816B (en) * | 2014-11-27 | 2017-02-22 | 杭州电子科技大学 | Control circuit for real-time supply of motor braking energy to alternating-current inertia load |
| CN111987756A (en) * | 2020-05-20 | 2020-11-24 | 杭州士兰微电子股份有限公司 | Charging circuit |
| CN112803720B (en) * | 2021-03-19 | 2021-06-22 | 中国电子科技集团公司第九研究所 | Power supply voltage monitoring circuit of multi-power supply system |
| CN117526711B (en) * | 2024-01-03 | 2024-03-29 | 拓尔微电子股份有限公司 | Voltage conversion circuit, voltage conversion method and power management chip |
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| CN102723863A (en) * | 2011-03-30 | 2012-10-10 | 上海三菱电梯有限公司 | Non-isolated bi-directional DC-DC converter control method |
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