CN205160372U - Boost - Google Patents
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- CN205160372U CN205160372U CN201520804896.9U CN201520804896U CN205160372U CN 205160372 U CN205160372 U CN 205160372U CN 201520804896 U CN201520804896 U CN 201520804896U CN 205160372 U CN205160372 U CN 205160372U
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Abstract
The utility model relates to a technical field charges, the utility model provides a boost, boost include boost module, threshold voltage generation module, switch module, output module, control module, a voltage comparater and voltage switching module, when input voltage was greater than threshold voltage, control module exported input voltage for the switch module according to comparative result control boost module, and control switch module switches on in order to send input voltage for output module to output module adjusts output module so that exporting the voltage the same with the threshold voltage value according to input voltage, when input voltage was less than threshold voltage, the switch module was given in output after stepping up input voltage according to comparative result control boost module, and control switch module switches on in order to send input voltage for output module to make output module output voltage, through carrying out input voltage and threshold voltage the comparison, to the input voltage control of stepping up or step down, the realization is to output voltage's adjustment.
Description
Technical field
The utility model relates to charging technique field, particularly relates to a kind of boost chip.
Background technology
At present, the most of boost chip on market without buck functionality, when output voltage is lower than input voltage, make output voltage not be adjusted to desired value, cause and require higher to the output precision of prime chip in charger market.In sum, the output voltage that there is boost chip in prior art can not be adjusted to desired value to be caused requiring high problem to the output precision of prime chip.
Utility model content
The purpose of this utility model is to provide a kind of boost chip, is intended to solve can not be adjusted to desired value for the output voltage that there is boost chip in prior art and cause requiring high problem to the output precision of prime chip.
The utility model is achieved in that first aspect provides a kind of boost chip, and described boost chip comprises boost module, threshold voltage generation module, switch module, output module, control module, the first voltage comparator and voltage switching module;
The voltage input end of described boost module connects the first input end of described first voltage comparator and forms Input voltage terminal, the voltage output end of described boost module connects the voltage input end of described threshold voltage generation module and the input of described switch module, the signal output part of described threshold voltage generation module connects the first signal input part of described control module, the output of described switch module connects the input of described output module, first signal output part of described control module connects the control end of described switch module, the secondary signal output of described control module connects the control end of described switch module, 3rd signal output part of described control module connects the control end of described output module, 4th signal output part of described control module connects the control end of described voltage switching module, the output of described voltage switching module connects the second input of described first voltage comparator, the output of described first voltage comparator connects the secondary signal input of described control module,
The multiple reference voltage of outside predeterminated voltage and inside is compared rear acquisition threshold voltage logical signal by described threshold voltage generation module, and described threshold voltage logical signal is exported to described control module;
Described control module controls described voltage switching module according to described threshold voltage logical signal and exports the threshold voltage corresponding with described threshold voltage logical signal to described first voltage comparator;
Described first voltage comparator receives input voltage, and described input voltage and threshold voltage is compared, and comparative result is sent to described control module;
When described input voltage is greater than described threshold voltage, described control module controls described boost module according to comparative result and input voltage is exported to described switch module, control described switch module conducting so that described input voltage is sent to described output module, and regulate described output module to export the voltage identical with described threshold voltage value to make described output module according to described input voltage;
When described input voltage is less than described threshold voltage, described control module controls to export to described switch module after input voltage boosts by described boost module according to comparative result, control described switch module conducting so that the input voltage after boosting is sent to described output module, and make described output module output voltage.
In conjunction with first aspect, in the first execution mode of first aspect, described threshold voltage generation module comprises the first reference voltage generation unit, the second reference voltage generation unit, the 3rd reference voltage generation unit, the second voltage comparator, tertiary voltage comparator and the 4th voltage comparator;
Described first reference voltage generation unit, the voltage input end of described second reference voltage generation unit and described 3rd reference voltage generation unit connects altogether and forms the voltage input end of described threshold voltage generation module, the voltage output end of described first reference voltage generation unit connects the first input end of described second voltage comparator, the voltage output end of described second reference voltage generation unit connects the first input end of described tertiary voltage comparator, the voltage output end of described 3rd reference voltage generation unit connects the first input end of described 4th voltage comparator, second input of described second voltage comparator, second input of tertiary voltage comparator and the second input of the 4th voltage comparator connect to input described outside altogether and preset input voltage, the output of described second voltage comparator is the first signal output part of described threshold voltage generation module, the output of described tertiary voltage comparator is the secondary signal output of described threshold voltage generation module, the output of described 4th voltage comparator is the 3rd signal output part of described threshold voltage generation module,
Described first reference voltage generation unit exports the first reference voltage to described second voltage comparator, and described first reference voltage and described outside predeterminated voltage are compared rear output first threshold voltage logic signal to described control module by described second voltage comparator;
Described second reference voltage generation unit exports the second reference voltage to described tertiary voltage comparator, and described second reference voltage and described outside predeterminated voltage are compared rear output Second Threshold voltage logic signal to described control module by described tertiary voltage comparator;
Described 3rd reference voltage generation unit exports the 3rd reference voltage to described 4th voltage comparator, and described 3rd reference voltage and described outside predeterminated voltage are compared rear output the 3rd threshold voltage logical signal to described control module by described 4th voltage comparator;
Described control module obtains threshold voltage logical signal according to described first threshold voltage logic signal, described Second Threshold voltage logic signal and described 3rd threshold voltage logical signal.
In conjunction with first aspect and the first execution mode thereof, in the second execution mode of first aspect, described first reference voltage generation unit comprises the 3rd resistance and the 4th resistance, the first end of described 3rd resistance is the voltage input end of described first reference voltage generation unit, second end of described 3rd resistance connects the first end of described 4th resistance and forms the voltage output end of described first reference voltage generation unit, the second end ground connection of described 4th resistance;
Described second reference voltage generation unit comprises the 5th resistance and the 6th resistance, the first end of described 6th resistance is the voltage input end of described second reference voltage generation unit, second end of described 6th resistance connects the first end of described 5th resistance and forms the voltage output end of described second reference voltage generation unit, the second end ground connection of described 5th resistance;
Described 3rd reference voltage generation unit comprises the 7th resistance and the 8th resistance, the first end of described 7th resistance is the voltage input end of described 3rd reference voltage generation unit, second end of described 7th resistance connects the first end of described 8th resistance and forms the voltage output end of described 3rd reference voltage generation unit, the second end ground connection of described 8th resistance.
In conjunction with first aspect, in the third execution mode of first aspect, described boost module comprises boost logic unit, the first switching tube and second switch pipe;
The control end of described boost logic unit is the control end of described boost module, first output of described boost logic unit connects the control end of described first switching tube, second output of described boost logic unit connects the control end of described second switch pipe, the input of described first switching tube and the input of described second switch pipe connect the voltage input end forming described boost module altogether, the output head grounding of described first switching tube, the output of described second switch pipe is the voltage output end of described boost module.
In conjunction with first aspect, in the 4th kind of execution mode of first aspect, described output module comprises the 9th resistance and the tenth variable resistor;
The first end of described 9th resistance is input and the output of described output module, second end of described 9th resistance connects described tenth variable-resistance first end, described tenth variable-resistance second end ground connection, described tenth variable-resistance control end is the control end of described output module.
In conjunction with first aspect and the 4th kind of execution mode thereof, in the 5th kind of execution mode of first aspect, described switch module comprises the 5th voltage comparator and the 3rd switching tube;
First voltage input end of described 5th voltage comparator connects reference voltage, second voltage input end of described 5th voltage comparator connects the second end of described 9th resistance, the control end of described 5th voltage comparator is the control end of described switch module, the output of described 5th voltage comparator connects the control end of described 3rd switching tube, the input of described 3rd switching tube is the input of described switch module, and the output of described 3rd switching tube is the output of described switch module.
A kind of boost chip that the utility model provides, by input voltage and threshold voltage are compared, and control to boost to input voltage or step-down control according to comparative result, achieve the adjustment to output voltage when output voltage is lower than input voltage, to avoid, to the too high requirement of prime chip output voltage precision, reducing the cost of whole system.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme in the utility model embodiment, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only embodiments more of the present utility model, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the structural representation of a kind of boost chip that a kind of embodiment of the utility model provides;
Fig. 2 is the circuit diagram of a kind of boost chip that a kind of embodiment of the utility model provides.
Embodiment
In order to make the purpose of this utility model, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the utility model is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the utility model, and be not used in restriction the utility model.
In order to the technical solution of the utility model is described, be described below by specific embodiment.
A kind of embodiment of the utility model provides a kind of boost chip, as shown in Figure 1, boost chip comprises boost module 101, threshold voltage generation module 104, switch module 102, output module 103, control module 105, first voltage comparator 106 and voltage switching module 107;
The voltage input end of boost module 101 connects the first input end of the first voltage comparator 106 and forms Input voltage terminal, the voltage input end of voltage output end connect threshold voltage generation module 104 of boost module 101 and the input of switch module 102, first signal input part of the signal output part link control module 105 of threshold voltage generation module 104, the output of switch module 102 connects the input of output module 103, the control end of the first signal output part connecting valve module 102 of control module 105, the control end of the secondary signal output connecting valve module 102 of control module 105, 3rd signal output part of control module 105 connects the control end of output module 103, 4th signal output part of control module 105 connects the control end of voltage switching module 107, the output of voltage switching module 107 connects the second input of the first voltage comparator 106, the secondary signal input of the output link control module 105 of the first voltage comparator 106,
The multiple reference voltage of outside predeterminated voltage and inside is compared rear acquisition threshold voltage logical signal by threshold voltage generation module 104, and threshold voltage logical signal is exported to control module 105;
Control module 105 exports the threshold voltage corresponding with threshold voltage logical signal to the first voltage comparator 106 according to threshold voltage logical signal control voltage handover module;
First voltage comparator 106 receives input voltage, and input voltage and threshold voltage is compared, and comparative result is sent to control module 105;
When input voltage is greater than threshold voltage, control module 105 controls boost module 101 according to comparative result and input voltage is exported to switch module 102, control switch module 102 conducting is to send to output module 103 by input voltage, and regulation output module 103 exports the voltage identical with described threshold voltage value to make output module 103 according to input voltage;
When input voltage is less than threshold voltage, control module 105 controls to export to switch module 102 after input voltage boosts by boost module 101 according to comparative result, control switch module 102 conducting so that the input voltage after boosting is sent to output module 103, and makes output module 103 output voltage.
Wherein, output voltage can have altogether three kinds of gears: 5V, 9V, 12V, when input voltage is greater than output voltage time, switch module 102 enters LDO pattern, maintenance output voltage is threshold voltage, when input voltage is less than output voltage time, boost module 101 is started working, and switch module 102 enters LoadSwitch pattern.
Concrete, threshold voltage generation module 104 comprises the first reference voltage generation unit 1041, second reference voltage generation unit 1042, the 3rd reference voltage generation unit 1043, second voltage comparator COMP1, tertiary voltage comparator COMP2 and the 4th voltage comparator COMP3;
First reference voltage generation unit 1041, the voltage input end of the second reference voltage generation unit 1042 and the 3rd reference voltage generation unit 1043 connects altogether and forms the voltage input end of threshold voltage generation module 104, the voltage output end of the first reference voltage generation unit 1041 connects the first input end of the second voltage comparator COMP1, the voltage output end of the second reference voltage generation unit 1042 connects the first input end of tertiary voltage comparator COMP2, the voltage output end of the 3rd reference voltage generation unit 1043 connects the first input end of the 4th voltage comparator COMP3, second input of the second voltage comparator COMP1, second input of tertiary voltage comparator COMP2 and second input of the 4th voltage comparator COMP3 connect to input outside default input voltage altogether, the output of the second voltage comparator COMP1 is the first signal output part of threshold voltage generation module 104, the output of tertiary voltage comparator COMP2 is the secondary signal output of threshold voltage generation module 104, the output of the 4th voltage comparator COMP3 is the 3rd signal output part of threshold voltage generation module 104,
First reference voltage generation unit 1041 exports the first reference voltage and the first reference voltage and outside predeterminated voltage is compared rear output first threshold voltage logic signal to control module 105 to the second voltage comparator COMP1, the second voltage comparator COMP1;
Second reference voltage generation unit 1042 exports the second reference voltage to tertiary voltage comparator COMP2, and the second reference voltage and outside predeterminated voltage are compared rear output Second Threshold voltage logic signal to control module 105 by tertiary voltage comparator COMP2;
3rd reference voltage generation unit 1043 exports the 3rd reference voltage and the 3rd reference voltage and outside predeterminated voltage is compared rear output the 3rd threshold voltage logical signal to control module 105 to the 4th voltage comparator COMP3, tertiary voltage comparator COMP3;
Control module 105 obtains threshold voltage logical signal according to first threshold voltage logic signal, Second Threshold voltage logic signal and the 3rd threshold voltage logical signal.
Concrete, first reference voltage generation unit 1041 comprises the 7th resistance R7 and the 8th resistance R8, the first end of the 7th resistance R7 is the voltage input end of the first reference voltage generation unit 1041, second end of the 7th resistance R7 connects the first end of the 8th resistance R8 and forms the voltage output end of the first reference voltage generation unit 1041, the second end ground connection of the 8th resistance R8.
Second reference voltage generation unit 1042 comprises the 5th resistance R5 and the 6th resistance R6, the first end of the 6th resistance R6 is the voltage input end of the second reference voltage generation unit 1042, second end of the 6th resistance R6 connects the first end of the 5th resistance R5 and forms the voltage output end of the second reference voltage generation unit 1042, the second end ground connection of the 5th resistance R5;
3rd reference voltage generation unit 1043 comprises the 3rd resistance R3 and the 4th resistance R4, the first end of the 3rd resistance R3 is the voltage input end of the 3rd reference voltage generation unit 1043, second end of the 3rd resistance R3 connects the first end of the 4th resistance R4 and forms the voltage output end of the 3rd reference voltage generation unit 1043, the second end ground connection of the 4th resistance R4;
Further, outside predeterminated voltage can be obtained by predeterminated voltage generation module 110, and predeterminated voltage generation module 110 comprises the first electric capacity C1, the first resistance R1 and the second resistance R2; The first end of the first electric capacity C1 connects altogether with the first end of the second resistance R2 and is connected the voltage output end of boost module 101, second end of the second resistance R2 connects the first end of the first resistance R1 and forms the output of predeterminated voltage generation module 110, thinks that threshold voltage generation module 104 provides outside predeterminated voltage.
Concrete, voltage on first electric capacity C1 can by automatic stabilisation in desired value, its desired value is determined by the ratio of reference voltage VREF and the second resistance R2 and the first resistance R1, and its computing formula is voltage Vc1=VREF* (the R1+R2)/R1 on the first electric capacity C1.
Further, boost module 101 comprises boost logic unit 1011, first switching tube Q1 and second switch pipe Q2;
The control end of boost logic unit 1011 is the control end of boost module 101, first output of boost logic unit 1011 connects the grid of the first switching tube Q1, second output of boost logic unit connects the grid of second switch pipe Q2, the drain electrode of the first switching tube Q1 and the source electrode of second switch pipe Q2 connect the voltage input end forming boost module 101 altogether, the source ground of the first switching tube Q1, the drain electrode of second switch pipe Q2 is the voltage output end of boost module 101.
Concrete, when input voltage is greater than output voltage time, the first switching tube Q1 turns off by boost module 101, second switch pipe Q2 normal open, when input voltage is less than output voltage time, boost module 101 is started working, and the first switching tube Q1 and second switch pipe Q2 opens alternately.
Wherein, the first switching tube and second switch pipe can be field effect transistor, triode and IGBT etc.
Further, output module 103 comprises the 9th resistance R9 and the tenth variable resistor R10;
The first end of the 9th resistance R9 is input and the output of output module 103, second end of the 9th resistance R9 connects the first end of the tenth variable resistor R10, the second end ground connection of the tenth variable resistor R10, the control end of the tenth variable resistor R10 is the control end of output module 103.
Further, switch module 102 comprises the 5th voltage comparator CMP4 and the 3rd switching tube Q3;
First voltage input end of the 5th voltage comparator CMP4 connects reference voltage, second voltage input end of the 5th voltage comparator CMP4 connects the second end of the 9th resistance, the control end of the 5th voltage comparator CMP4 is the control end of switch module 102, the output of the 5th voltage comparator CMP4 connects the grid of the 3rd switching tube Q3, the drain electrode of the 3rd switching tube Q3 is the input of switch module 102, and the source electrode of the 3rd switching tube Q3 is the output of switch module 102.
The specific implementation principle of a kind of boost chip of the utility model is as follows:
When boost chip is opened, 3rd switching tube Q3 turns off, boost module 101 automatic operation that first switching tube Q1 and second switch pipe Q2 forms, now, voltage on first electric capacity C1 can by automatic stabilisation in desired value, its desired value is determined by the ratio of reference voltage VREF and the second resistance R2 and the first resistance R1, and its computing formula is Vc1=VREF* (R1+R2)/R1.The ratio R2/R1=N of present hypothesis second resistance R2 and the first resistance R1, the ratio R3/R4=n1 of the 3rd resistance R3 and the 4th resistance R4, the ratio R6/R5=n2 of the 6th resistance R6 and the 5th resistance R5, the ratio R7/R8=n3 of the 7th resistance R7 and the 8th resistance R8, wherein VREF* (R3+R4)/R4, VREF* (R5+R6)/R6, VREF* (R7+R8)/R8 equals 5V respectively, 9V, 12V.
When arranging outside resistance ratio (ratio of the second resistance R2 and the first resistance R1) and making the first capacitance voltage Vc1 be 5V, setting the first reference voltage module output voltage is V1, second reference voltage module output voltage is V2,3rd reference voltage module output voltage is V3, input external reference voltage is V4, so V3 is no better than external reference voltage V4, and V2 is less than V4, and V1 is also less than V4; Resistance ratio (ratio of R2 and R1) when outside makes Vc1 be 9V, and so V3 is greater than V4, and V2 equals V4, and V1 is less than V4; When the resistance ratio (ratio of R2 and R1) of outside makes Vc1 be 12V, so V3 is greater than V4, and V2 is greater than V4, and V1 is no better than V4.
Therefore, just can produce first threshold voltage logic signal Sel1, Second Threshold voltage logic signal Sel2 and the 3rd threshold voltage logical signal Sel3, these three threshold voltage logical signals are produced by control module 105 and control control signal Sel4 and Sel5 to control the first switching tube Q1 in boost module 101 and second switch pipe Q2 and LDO circuit Q3 respectively.When the resistance ratio of outside makes Vc1 be 5V time, so V3 will equal V4, V2 is less than V4, V1 is less than V4, the Sel3 exported is high level, the Sel2 exported is low level, the Sel1 exported is low level, adjustment the tenth variable resistor R10 is removed by Sel4 can be exported after control, make the proportionality coefficient of the tenth variable resistor R10 and the 9th resistance R9 output voltage VO UT can be set to 5V, can export control signal Sel6 goes control voltage handover module 107 to select output threshold voltage vt h_PT to equal 5V simultaneously, when input voltage is greater than 5V, control module 105 exports Sel5 to turn off the first switching tube Q1, open second switch pipe Q2, and make the 3rd switching tube Q3 enter LDO pattern, if input voltage is less than 5V, so the 3rd switching tube Q3 enters LOADSWITCH pattern, and the first switching tube Q1 and second switch pipe Q2 opens alternately.
Wherein voltage switching module 107 and output voltage mutually mate, when output voltage is arranged on 5V, voltage switching module 107 will be chosen as 5V by Sel6, when output voltage is arranged on 9V, voltage switching module 107 will be chosen as 9V by Sel6, when output voltage is set to 12V, voltage switching module 107 will be chosen as 12V by Sel6.Concrete relation correspondence table is as follows:
Table 1 input voltage and threshold voltage relation and select mode of operation table
A kind of boost chip that the utility model provides, by input voltage and threshold voltage are compared, and control to boost to input voltage or step-down control according to comparative result, achieve the adjustment to output voltage when output voltage is lower than input voltage, to avoid, to the too high requirement of prime chip output voltage precision, reducing the cost of whole system.
The utility model boost chip is integrated with the function of boosting and step-down, automatically the ratio of output feedack resistance can be detected, and the carrying out of segmentation controls to determine whether enter decompression mode, voltage after step-down effectively can be controlled within the permissible range of desired value, and reach the highest efficiency.
Above content is in conjunction with concrete preferred implementation further detailed description of the utility model, can not assert that concrete enforcement of the present utility model is confined to these explanations.For the utility model person of an ordinary skill in the technical field; make some equivalent alternative or obvious modification without departing from the concept of the premise utility; and performance or purposes identical, all should be considered as belonging to the scope of patent protection that the utility model is determined by submitted to claims.
Claims (6)
1. a boost chip, is characterized in that, described boost chip comprises boost module, threshold voltage generation module, switch module, output module, control module, the first voltage comparator and voltage switching module;
The voltage input end of described boost module connects the first input end of described first voltage comparator and forms Input voltage terminal, the voltage output end of described boost module connects the voltage input end of described threshold voltage generation module and the input of described switch module, the signal output part of described threshold voltage generation module connects the first signal input part of described control module, the output of described switch module connects the input of described output module, first signal output part of described control module connects the control end of described switch module, the secondary signal output of described control module connects the control end of described switch module, 3rd signal output part of described control module connects the control end of described output module, 4th signal output part of described control module connects the control end of described voltage switching module, the output of described voltage switching module connects the second input of described first voltage comparator, the output of described first voltage comparator connects the secondary signal input of described control module,
The multiple reference voltage of outside predeterminated voltage and inside is compared rear acquisition threshold voltage logical signal by described threshold voltage generation module, and described threshold voltage logical signal is exported to described control module;
Described control module controls described voltage switching module according to described threshold voltage logical signal and exports the threshold voltage corresponding with described threshold voltage logical signal to described first voltage comparator;
Described first voltage comparator receives input voltage, and described input voltage and threshold voltage is compared, and comparative result is sent to described control module;
When described input voltage is greater than described threshold voltage, described control module controls described boost module according to comparative result and input voltage is exported to described switch module, control described switch module conducting so that described input voltage is sent to described output module, and regulate described output module to export the voltage identical with described threshold voltage value to make described output module according to described input voltage;
When described input voltage is less than described threshold voltage, described control module controls to export to described switch module after input voltage boosts by described boost module according to comparative result, control described switch module conducting so that the input voltage after boosting is sent to described output module, and make described output module output voltage.
2. boost chip as claimed in claim 1, it is characterized in that, described threshold voltage generation module comprises the first reference voltage generation unit, the second reference voltage generation unit, the 3rd reference voltage generation unit, the second voltage comparator, tertiary voltage comparator and the 4th voltage comparator;
Described first reference voltage generation unit, the voltage input end of described second reference voltage generation unit and described 3rd reference voltage generation unit connects altogether and forms the voltage input end of described threshold voltage generation module, the voltage output end of described first reference voltage generation unit connects the first input end of described second voltage comparator, the voltage output end of described second reference voltage generation unit connects the first input end of described tertiary voltage comparator, the voltage output end of described 3rd reference voltage generation unit connects the first input end of described 4th voltage comparator, second input of described second voltage comparator, second input of tertiary voltage comparator and the second input of the 4th voltage comparator connect to input described outside altogether and preset input voltage, the output of described second voltage comparator is the first signal output part of described threshold voltage generation module, the output of described tertiary voltage comparator is the secondary signal output of described threshold voltage generation module, the output of described 4th voltage comparator is the 3rd signal output part of described threshold voltage generation module,
Described first reference voltage generation unit exports the first reference voltage to described second voltage comparator, and described first reference voltage and described outside predeterminated voltage are compared rear output first threshold voltage logic signal to described control module by described second voltage comparator;
Described second reference voltage generation unit exports the second reference voltage to described tertiary voltage comparator, and described second reference voltage and described outside predeterminated voltage are compared rear output Second Threshold voltage logic signal to described control module by described tertiary voltage comparator;
Described 3rd reference voltage generation unit exports the 3rd reference voltage to described 4th voltage comparator, and described 3rd reference voltage and described outside predeterminated voltage are compared rear output the 3rd threshold voltage logical signal to described control module by described 4th voltage comparator;
Described control module obtains threshold voltage logical signal according to described first threshold voltage logic signal, described Second Threshold voltage logic signal and described 3rd threshold voltage logical signal.
3. boost chip as claimed in claim 2, it is characterized in that, described first reference voltage generation unit comprises the 3rd resistance and the 4th resistance, the first end of described 3rd resistance is the voltage input end of described first reference voltage generation unit, second end of described 3rd resistance connects the first end of described 4th resistance and forms the voltage output end of described first reference voltage generation unit, the second end ground connection of described 4th resistance;
Described second reference voltage generation unit comprises the 5th resistance and the 6th resistance, the first end of described 6th resistance is the voltage input end of described second reference voltage generation unit, second end of described 6th resistance connects the first end of described 5th resistance and forms the voltage output end of described second reference voltage generation unit, the second end ground connection of described 5th resistance;
Described 3rd reference voltage generation unit comprises the 7th resistance and the 8th resistance, the first end of described 7th resistance is the voltage input end of described 3rd reference voltage generation unit, second end of described 7th resistance connects the first end of described 8th resistance and forms the voltage output end of described 3rd reference voltage generation unit, the second end ground connection of described 8th resistance.
4. boost chip as claimed in claim 1, it is characterized in that, described boost module comprises boost logic unit, the first switching tube and second switch pipe;
The control end of described boost logic unit is the control end of described boost module, first output of described boost logic unit connects the control end of described first switching tube, second output of described boost logic unit connects the control end of described second switch pipe, the input of described first switching tube and the input of described second switch pipe connect the voltage input end forming described boost module altogether, the output head grounding of described first switching tube, the output of described second switch pipe is the voltage output end of described boost module.
5. boost chip as claimed in claim 1, it is characterized in that, described output module comprises the 9th resistance and the tenth variable resistor;
The first end of described 9th resistance is input and the output of described output module, second end of described 9th resistance connects described tenth variable-resistance first end, described tenth variable-resistance second end ground connection, described tenth variable-resistance control end is the control end of described output module.
6. boost chip as claimed in claim 5, it is characterized in that, described switch module comprises the 5th voltage comparator and the 3rd switching tube;
First voltage input end of described 5th voltage comparator connects reference voltage, second voltage input end of described 5th voltage comparator connects the second end of described 9th resistance, the control end of described 5th voltage comparator is the control end of described switch module, the output of described 5th voltage comparator connects the control end of described 3rd switching tube, the input of described 3rd switching tube is the input of described switch module, and the output of described 3rd switching tube is the output of described switch module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520804896.9U CN205160372U (en) | 2015-10-16 | 2015-10-16 | Boost |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520804896.9U CN205160372U (en) | 2015-10-16 | 2015-10-16 | Boost |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205160372U true CN205160372U (en) | 2016-04-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520804896.9U Withdrawn - After Issue CN205160372U (en) | 2015-10-16 | 2015-10-16 | Boost |
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| CN (1) | CN205160372U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105226945A (en) * | 2015-10-16 | 2016-01-06 | 深圳宝砾微电子有限公司 | Boost chip |
| CN108631400A (en) * | 2018-05-22 | 2018-10-09 | 漳州立达信光电子科技有限公司 | Control circuit and method for power supply |
-
2015
- 2015-10-16 CN CN201520804896.9U patent/CN205160372U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105226945A (en) * | 2015-10-16 | 2016-01-06 | 深圳宝砾微电子有限公司 | Boost chip |
| CN105226945B (en) * | 2015-10-16 | 2017-09-12 | 深圳宝砾微电子有限公司 | Boost chip |
| CN108631400A (en) * | 2018-05-22 | 2018-10-09 | 漳州立达信光电子科技有限公司 | Control circuit and method for power supply |
| CN108631400B (en) * | 2018-05-22 | 2020-09-18 | 漳州立达信光电子科技有限公司 | Control circuit and method of power supply |
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