CN105226945B - Boost chip - Google Patents
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- CN105226945B CN105226945B CN201510672295.1A CN201510672295A CN105226945B CN 105226945 B CN105226945 B CN 105226945B CN 201510672295 A CN201510672295 A CN 201510672295A CN 105226945 B CN105226945 B CN 105226945B
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Abstract
The present invention relates to charging technique field, the present invention provides a kind of boost chip, and boost chip includes boost module, threshold voltage generation module, switch module, output module, control module, first voltage comparator and threshold voltage selecting module；When input voltage is more than threshold voltage, control module controls boost module to export input voltage to switch module according to comparative result, the conducting of controlling switch module adjusts output module so that output module is according to input voltage output and threshold voltage value identical voltage so that input voltage is sent into output module；When input voltage is less than threshold voltage, boost module is controlled to be exported after input voltage is boosted to switch module according to comparative result, controlling switch module turns on the input voltage after boosting being sent to output module, and make output module output voltage, by the way that input voltage is compared with threshold voltage, control is boosted or be depressured to input voltage, realizes the adjustment to output voltage.
Description
Technical field
The present invention relates to charging technique field, more particularly to a kind of boost chip.
Background technology
At present, most of boost chip of in the market and without buck functionality is lower than input voltage in output voltage
When, prevent output voltage from being adjusted to desired value, cause the output precision to prime chip in charger market
It is required that higher.In summary, there is the output voltage of boost chip in the prior art and can not be adjusted to desired value causes to preceding
The problem of output precision of level chip requires high.
The content of the invention
It is an object of the invention to provide a kind of boost chip, it is intended to solves for there is boost chip in the prior art
Output voltage, which can not be adjusted to desired value, causes the problem of output precision requirement to prime chip is high.
The present invention is achieved in that first aspect provides a kind of boost chip, the boost chip include boost module,
Threshold voltage generation module, switch module, output module, control module, first voltage comparator and threshold voltage selection mould
Block；
The voltage input end of the boost module connects the first input end of the first voltage comparator and constitutes input
Voltage end, the voltage output end of the boost module connects the voltage input end of the threshold voltage generation module and described opened
The input of module is closed, the signal output part of the threshold voltage generation module connects the first signal input of the control module
End, the output end of the switch module connects the input of the output module, the first signal output part of the control module
The control end of the switch module is connected, the secondary signal output end of the control module connects the control of the switch module
End, the 3rd signal output part of the control module connects the control end of the output module, the 4th letter of the control module
Number output end connects the control end of the threshold voltage selecting module, and the output end connection of the threshold voltage selecting module is described
Second input of first voltage comparator, the output end of the first voltage comparator connects the second letter of the control module
Number input；
The threshold voltage generation module obtains threshold after being compared outside predeterminated voltage and internal multiple reference voltages
Threshold voltage logical signal, and the threshold voltage logical signal is exported to the control module；
The control module controls the voltage threshold selecting module output and institute according to the threshold voltage logical signal
The corresponding threshold voltage of threshold voltage logical signal is stated to the first voltage comparator；
The first voltage comparator receives input voltage, and the input voltage and threshold voltage are compared, and
Comparative result is sent to the control module；
When the input voltage is more than the threshold voltage, the control module controls the boosting according to comparative result
Module exports input voltage to the switch module, controls the switch module conducting that the input voltage is sent into institute
Output module is stated, and adjusts the output module so that the output module is according to input voltage output and threshold value electricity
Pressure value identical voltage；
When the input voltage is less than the threshold voltage, the control module controls the boosting according to comparative result
Module is exported after input voltage is boosted to the switch module, controls the switch module conducting with will be after boosting
Input voltage be sent to the output module, and make the output module output voltage.
With reference in a first aspect, in the first embodiment of first aspect, the threshold voltage generation module includes the
One reference voltage generation unit, the second reference voltage generation unit, the 3rd reference voltage generation unit, second voltage comparator,
Tertiary voltage comparator and the 4th voltage comparator；
The first reference voltage generation unit, the second reference voltage generation unit and the 3rd reference voltage
The voltage input end of generation unit connects and constitutes the voltage input end of the threshold voltage generation module altogether, the first benchmark electricity
The voltage output end of generation unit is pressed to connect the first input end of the second voltage comparator, the second reference voltage generation
The voltage output end of unit connects the first input end of the tertiary voltage comparator, the 3rd reference voltage generation unit
The first input end of voltage output end connection the 4th voltage comparator, the second input of the second voltage comparator,
Second input of tertiary voltage comparator and the second input of the 4th voltage comparator connect pre- to input the outside altogether
If input voltage, the output end of the second voltage comparator is the first signal output part of the threshold voltage generation module,
The output end of the tertiary voltage comparator is the secondary signal output end of the threshold voltage generation module, the 4th voltage
The output end of comparator is the 3rd signal output part of the threshold voltage generation module；
The first reference voltage generation unit exports the first reference voltage to the second voltage comparator, described second
Voltage comparator exports first threshold voltage logic after first reference voltage is compared with the outside predeterminated voltage
Signal gives the control module；
The second reference voltage generation unit exports the second reference voltage to the tertiary voltage comparator, the described 3rd
Voltage comparator exports second threshold voltage logic after second reference voltage is compared with the outside predeterminated voltage
Signal gives the control module；
The 3rd reference voltage generation unit exports the 3rd reference voltage to the 4th voltage comparator, the described 4th
Voltage comparator exports the 3rd threshold voltage logic after the 3rd reference voltage is compared with the outside predeterminated voltage
Signal gives the control module；
The control module according to the first threshold voltage logical signal, the second threshold voltage logical signal and
The 3rd threshold voltage logical signal obtains threshold voltage logical signal.
With reference to first aspect and its first embodiment, in second of embodiment of first aspect, described first
Reference voltage generation unit includes 3rd resistor and the 4th resistance, and the first end of the 3rd resistor is first reference voltage
The voltage input end of generation unit, the second end of the 3rd resistor connects the first end of the 4th resistance and constitutes described the
The voltage output end of one reference voltage generation unit, the second end ground connection of the 4th resistance；
The second reference voltage generation unit includes the 5th resistance and the 6th resistance, and the first end of the 6th resistance is
The voltage input end of the second reference voltage generation unit, the second end of the 6th resistance connects the of the 5th resistance
One end and the voltage output end for constituting the second reference voltage generation unit, the second end ground connection of the 5th resistance；
The 3rd reference voltage generation unit includes the 7th resistance and the 8th resistance, and the first end of the 7th resistance is
The voltage input end of the 3rd reference voltage generation unit, the second end of the 7th resistance connects the of the 8th resistance
One end and the voltage output end for constituting the 3rd reference voltage generation unit, the second end ground connection of the 8th resistance.
With reference in a first aspect, in the third embodiment of first aspect, the boost module includes boost logic list
Member, first switch pipe and second switch pipe；
The control end of the boost logic unit is the control end of the boost module, the first of the boost logic unit
Output end connects the control end of the first switch pipe, and the second output end of the boost logic unit connects the second switch
The input of the control end of pipe, the input of the first switch pipe and the second switch pipe connects the composition boost module altogether
Voltage input end, the output head grounding of the first switch pipe, the output end of the second switch pipe is the boost module
Voltage output end.
With reference in a first aspect, in the 4th kind of embodiment of first aspect, the output module include the 9th resistance and
Tenth variable resistor；
The first end of 9th resistance is the input and output end of the output module, the second of the 9th resistance
The first end of end connection the tenth variable resistor, the second end ground connection of the tenth variable resistor, the tenth variable resistor
Control end be the output module control end.
With reference to first aspect and its 4th kind of embodiment, in the 5th kind of embodiment of first aspect, the switch
Module includes the 5th voltage comparator and the 3rd switching tube；
The first voltage input connection reference voltage of 5th voltage comparator, the of the 5th voltage comparator
Two voltage input ends connect the second end of the 9th resistance, and the control end of the 5th voltage comparator is the switch module
Control end, the output end of the 5th voltage comparator connects the control end of the 3rd switching tube, the 3rd switching tube
Input be the switch module input, the output end of the 3rd switching tube is the output end of the switch module.
A kind of boost chip that the present invention is provided, by the way that input voltage is compared with threshold voltage, and according to comparing
Output control is boosted or is depressured control to input voltage, is realized when output voltage is lower than input voltage to output electricity
The adjustment of pressure, to avoid the requirement too high to prime chip output voltage precision, reduces the cost of whole system.
Brief description of the drawings
Technical scheme in order to illustrate the embodiments of the present invention more clearly, below will be to embodiment or description of the prior art
In required for the accompanying drawing that uses be briefly described, it should be apparent that, drawings in the following description are only some of the present invention
Embodiment, for those of ordinary skill in the art, without having to pay creative labor, can also be according to these
Accompanying drawing obtains other accompanying drawings.
Fig. 1 is a kind of structural representation for boost chip that an embodiment of the present invention is provided；
Fig. 2 is a kind of circuit diagram for boost chip that an embodiment of the present invention is provided.
Embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, it is right below in conjunction with drawings and Examples
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.
In order to illustrate technical scheme, illustrated below by specific embodiment.
An embodiment of the present invention provides a kind of boost chip, as shown in figure 1, boost chip includes boost module 101, threshold
Threshold voltage generation module 104, switch module 102, output module 103, control module 105, first voltage comparator 106 and threshold
Threshold voltage selecting module 107；
The first input end of the voltage input end connection first voltage comparator 106 of boost module 101 simultaneously constitutes input electricity
Pressure side, the voltage input end and switch module of the voltage output end connection threshold voltage generation module 104 of boost module 101
102 input, the first signal input part of the signal output part link control module 105 of threshold voltage generation module 104, is opened
The output end for closing module 102 connects the input of output module 103, the first signal output part connecting valve of control module 105
The control end of module 102, the control end of the secondary signal output end connecting valve module 102 of control module 105, control module
105 the 3rd signal output part connects the control end of output module 103, the 4th signal output part connection threshold of control module 105
The control end of threshold voltage selecting module 107, the output end connection first voltage comparator 106 of threshold voltage selecting module 107
Second input, the secondary signal input of the output end link control module 105 of first voltage comparator 106；
Threshold voltage generation module 104 obtains threshold value after being compared outside predeterminated voltage and internal multiple reference voltages
Voltage logic signal, and threshold voltage logical signal is exported to control module 105；
Control module 105 is according to the output of threshold voltage logical signal control voltage threshold value selecting module and threshold voltage logic
The corresponding threshold voltage of signal is to first voltage comparator 106；
First voltage comparator 106 receives input voltage, and input voltage is compared with threshold voltage, and will compare
As a result it is sent to control module 105；
When input voltage is more than threshold voltage, control module 105 controls boost module 101 to input according to comparative result
Voltage output is to switch module 102, and controlling switch module 102 is turned on so that input voltage is sent into output module 103, and is adjusted
Output module 103 is so that output module 103 is according to input voltage output and the threshold voltage value identical voltage；
When input voltage is less than threshold voltage, control module 105 controls boost module 101 to input according to comparative result
Voltage is exported after being boosted to switch module 102, and controlling switch module 102 turns on to send out the input voltage after boosting
Output module 103 is given, and makes the output voltage of output module 103.
Wherein, output voltage, which has altogether, can three kinds of gears：5V, 9V, 12V, when input voltage is more than output voltage
Wait, switch module 102 enters LDO patterns, holding output voltage is threshold voltage, when input voltage is less than output voltage
Wait, boost module 101 is started working, switch module 102 enters Load Switch patterns.
Given birth to specifically, threshold voltage generation module 104 includes the first reference voltage generation unit 1041, the second reference voltage
Into unit 1042, the 3rd reference voltage generation unit 1043, second voltage comparator COMP1, tertiary voltage comparator COMP2 with
And the 4th voltage comparator COMP3；
First reference voltage generation unit 1041, the second reference voltage generation unit 1042 and the generation of the 3rd reference voltage
The voltage input end of unit 1043 connects and constitutes the voltage input end of threshold voltage generation module 104 altogether, the life of the first reference voltage
Into the voltage output end connection second voltage comparator COMP1 of unit 1041 first input end, the generation of the second reference voltage is single
The voltage output end connection tertiary voltage comparator COMP2 of member 1042 first input end, the 3rd reference voltage generation unit
1043 voltage output end connects the 4th voltage comparator COMP3 first input end, the second of second voltage comparator COMP1
Second input of input, tertiary voltage comparator COMP2 the second input and the 4th voltage comparator COMP3 connects altogether
To input outside default input voltage, second voltage comparator COMP1 output end is the first of threshold voltage generation module 104
Signal output part, tertiary voltage comparator COMP2 output end is the secondary signal output end of threshold voltage generation module 104,
4th voltage comparator COMP3 output end is the 3rd signal output part of threshold voltage generation module 104；
First reference voltage generation unit 1041 exports the first reference voltage and gives second voltage comparator COMP1, the second electricity
Pressure comparator COMP1 by the first reference voltage with outside predeterminated voltage be compared after export first threshold voltage logical signal to
Control module 105；
Second reference voltage generation unit 1042 exports the second reference voltage and gives tertiary voltage comparator COMP2, the 3rd electricity
Pressure comparator COMP2 by the second reference voltage with outside predeterminated voltage be compared after export second threshold voltage logical signal to
Control module 105；
3rd reference voltage generation unit 1043 exports the 3rd reference voltage to the 4th voltage comparator COMP3, the 3rd electricity
Pressure comparator COMP3 by the 3rd reference voltage with outside predeterminated voltage be compared after export the 3rd threshold voltage logical signal to
Control module 105；
Control module 105 is according to first threshold voltage logical signal, second threshold voltage logical signal and the 3rd threshold value
Voltage logic signal acquisition threshold voltage logical signal.
Specifically, the first reference voltage generation unit 1041 includes the 7th resistance R7 and the 8th resistance R8, the 7th resistance R7
First end be the first reference voltage generation unit 1041 voltage input end, the 7th resistance R7 the second end connects the 8th resistance
R8 first end and the voltage output end for constituting the first reference voltage generation unit 1041, the 8th resistance R8 the second end ground connection.
Second reference voltage generation unit 1042 includes the 5th resistance R5 and the 6th resistance R6, the 6th resistance R6 first end
For the voltage input end of the second reference voltage generation unit 1042, the 6th resistance R6 the second end connects the first of the 5th resistance R5
Hold and constitute the voltage output end of the second reference voltage generation unit 1042, the 5th resistance R5 the second end ground connection；
3rd reference voltage generation unit 1043 includes 3rd resistor R3 and the 4th resistance R4,3rd resistor R3 first end
For the voltage input end of the 3rd reference voltage generation unit 1043,3rd resistor R3 the second end connects the first of the 4th resistance R4
Hold and constitute the voltage output end of the 3rd reference voltage generation unit 1043, the 4th resistance R4 the second end ground connection；
Further, outside predeterminated voltage can be obtained by predeterminated voltage generation module 110, predeterminated voltage generation module
110 include the first electric capacity C1, first resistor R1 and second resistance R2；First electric capacity C1 first end and the of second resistance R2
One end connects and connects the voltage output end of boost module 101 altogether, and the first of second resistance R2 the second end connection first resistor R1
The output end of predeterminated voltage generation module 110 is held and is formed, to provide outside predeterminated voltage for threshold voltage generation module 104.
Specifically, the voltage on the first electric capacity C1 can be by automatic stabilisation in desired value, its desired value is by reference voltage VREF
And second resistance R2 and first resistor R1 ratio are determined, its calculation formula is the voltage Vc1=VREF* on the first electric capacity C1
(R1+R2)/R1。
Further, boost module 101 includes boost logic unit 1011, first switch pipe Q1 and second switch pipe
Q2；
The control end of boost logic unit 1011 is the control end of boost module 101, the first of boost logic unit 1011
Output end connection first switch pipe Q1 grid, the second output end connection second switch pipe Q2 of boost logic unit grid,
First switch pipe Q1 drain electrode and second switch pipe Q2 source electrode connect the voltage input end for constituting boost module 101 altogether, and first opens
Pipe Q1 source ground is closed, second switch pipe Q2 drain electrode is the voltage output end of boost module 101.
Specifically, when input voltage is more than output voltage, boost module 101 turns off first switch pipe Q1, the
Two switching tube Q2 normal opens, when input voltage is less than output voltage, boost module 101 is started working, first switch pipe Q1
Unlatching is interacted with second switch pipe Q2.
Wherein, first switch pipe and second switch pipe can be FET, triode and IGBT etc..
Further, output module 103 includes the 9th resistance R9 and the tenth variable resistor R10；
9th resistance R9 first end is the input and output end of output module 103, and the 9th resistance R9 the second end connects
Connect the tenth variable resistor R10 first end, the tenth variable resistor R10 the second end ground connection, the tenth variable resistor R10 control end
For the control end of output module 103.
Further, switch module 102 includes the 5th voltage comparator CMP4 and the 3rd switching tube Q3；
5th voltage comparator CMP4 first voltage input connection reference voltage, the of the 5th voltage comparator CMP4
Two voltage input ends connect the second end of the 9th resistance, and the 5th voltage comparator CMP4 control end is the control of switch module 102
End processed, the 5th voltage comparator CMP4 output end connects the 3rd switching tube Q3 grid, and the 3rd switching tube Q3 drain electrode is to open
The input of module 102 is closed, the 3rd switching tube Q3 source electrode is the output end of switch module 102.
A kind of boost chip of the present invention to implement principle as follows：
When boost chip is opened, the 3rd switching tube Q3 shut-offs, the liter that first switch pipe Q1 and second switch pipe Q2 is constituted
Die block 101 works automatically, and now, the voltage on the first electric capacity C1 can be by automatic stabilisation in desired value, and its desired value is by referring to
Voltage VREF and second resistance R2 and first resistor R1 ratio determines, its calculation formula be Vc1=VREF* (R1+R2)/
R1.It is now assumed that second resistance R2 and first resistor R1 ratio R2/R1=N, 3rd resistor R3 and the 4th resistance R4 ratio
R3/R4=n1, the 6th resistance R6 and the 5th resistance R5 ratio R6/R5=n2, the 7th resistance R7 and the 8th resistance R8 ratio
R7/R8=n3, wherein VREF* (R3+R4)/R4, VREF* (R5+R6)/R6, VREF* (R7+R8)/R8 are respectively equal to 5V, 9V,
12V。
Resistance ratio (second resistance R2 and first resistor R1 ratio) outside setting causes the first capacitance voltage Vc1
When being 5V, the first reference voltage module output voltage is set as V1, and the second reference voltage module output voltage is V2, the 3rd benchmark
Voltage module output voltage is V3, and input external reference voltage is V4, then V3 is no better than external reference voltage V4, and V2 is small
In V4, V1 is again smaller than V4；When outside resistance ratio (R2 and R1 ratio) is such that Vc1 is 9V, then V3 is more than V4, and V2 is equal to
V4, and V1 is less than V4；When it is 12V that outside resistance ratio (R2 and R1 ratio), which causes Vc1, then V3 is more than V4, V2 is big
V4 is no better than in V4, V1.
Accordingly, it is possible to produce first threshold voltage logical signal Sel1, second threshold voltage logical signal Sel2 with
And the 3rd threshold voltage logical signal Sel3, these three threshold voltage logical signals pass through control module 105 and produce control control again
Signal Sel4 and Sel5 processed to control first switch pipe Q1 in boost module 101 and second switch pipe Q2 and LDO electricity respectively
Road Q3.When it is 5V that outside resistance ratio, which causes Vc1, then V3 will be equal to V4, V2 is less than V4, and V1 is less than V4, defeated
The Sel3 gone out is high level, and the Sel2 of output is low level, and the Sel1 of output is low level, is gone by that can export Sel4 after control
Adjust the tenth variable resistor R10 so that the tenth variable resistor R10 and the 9th resistance R9 proportionality coefficient can be by output voltage
VOUT, which is set, arrives 5V, while meeting output control signal Sel6 goes control threshold voltage selecting module 107 to select output threshold voltage
Vth_PT is equal to 5V, and when input voltage is more than 5V, control module 105 exports Sel5 to turn off first switch pipe Q1, opens the
Two switching tube Q2, and the 3rd switching tube Q3 is entered LDO patterns；If input voltage is less than 5V, then the 3rd switching tube Q3
Into LOAD SWITCH patterns, first switch pipe Q1 and second switch pipe Q2 interactions are opened.
Wherein threshold voltage selecting module 107 and output voltage are mutually matched, when output voltage is arranged on 5V,
Threshold voltage selecting module 107 will be 5V by Sel6 selections, when output voltage is arranged on 9V, threshold voltage selecting module
107 will be 9V by Sel6 selections, and when output voltage is arranged to 12V, threshold voltage selecting module 107 will be selected by Sel6
It is selected as 12V.Specific relation corresponding table is as follows：
The input voltage of table 1 and threshold voltage relation and selection mode of operation table
A kind of boost chip that the present invention is provided, by the way that input voltage is compared with threshold voltage, and according to comparing
Output control is boosted or is depressured control to input voltage, is realized when output voltage is lower than input voltage to output electricity
The adjustment of pressure, to avoid the requirement too high to prime chip output voltage precision, reduces the cost of whole system.
Boost chip of the present invention is integrated with the function of boosting and decompression, is capable of the ratio of automatic detection output feedback resistance,
And being controlled for being segmented decides whether to enter decompression mode so that the voltage after decompression can be controlled effectively in target
Within the permissible range of value, and reach highest efficiency.
Above content is to combine specific preferred embodiment further description made for the present invention, it is impossible to assert
The specific implementation of the present invention is confined to these explanations.For general technical staff of the technical field of the invention,
Some equivalent substitutes or obvious modification are made on the premise of not departing from present inventive concept, and performance or purposes are identical, all should
It is considered as belonging to the scope of patent protection that the present invention is determined by the claims submitted.
Claims (6)
1. a kind of boost chip, it is characterised in that the boost chip includes boost module, threshold voltage generation module, switch
Module, output module, control module, first voltage comparator and threshold voltage selecting module；
The voltage input end of the boost module connects the first input end of the first voltage comparator and constitutes input voltage
End, the voltage output end of the boost module connects the voltage input end and the switching molding of the threshold voltage generation module
The input of block, the signal output part of the threshold voltage generation module connects the first signal input part of the control module,
The output end of the switch module connects the input of the output module, the first signal output part connection of the control module
The control end of the boost module, the secondary signal output end of the control module connects the control end of the switch module, institute
The 3rd signal output part for stating control module connects the control end of the output module, the 4th signal output of the control module
The control end of the end connection threshold voltage selecting module, output end connection first electricity of the threshold voltage selecting module
The second input of comparator is pressed, the output end of the first voltage comparator connects the secondary signal input of the control module
End；
The threshold voltage generation module obtains threshold value electricity after being compared outside predeterminated voltage and internal multiple reference voltages
Logical signal is pressed, and the threshold voltage logical signal is exported to the control module；
The control module controls the voltage threshold selecting module output and the threshold according to the threshold voltage logical signal
The corresponding threshold voltage of threshold voltage logical signal gives the first voltage comparator；
The first voltage comparator receives input voltage, and the input voltage and threshold voltage are compared, and will compare
Relatively result is sent to the control module；
When the input voltage is more than the threshold voltage, the control module controls the boost module according to comparative result
Input voltage is exported to the switch module, controls the switch module conducting described defeated so that the input voltage to be sent to
Go out module, and adjust the output module so that the output module is according to input voltage output and the threshold voltage value
Identical voltage；
When the input voltage is less than the threshold voltage, the control module controls the boost module according to comparative result
Exported after input voltage is boosted to the switch module, control the switch module conducting with will be defeated after boosting
Enter voltage and be sent to the output module, and make the output module output voltage.
2. boost chip as claimed in claim 1, it is characterised in that the threshold voltage generation module includes the first benchmark electricity
Press generation unit, the second reference voltage generation unit, the 3rd reference voltage generation unit, second voltage comparator, tertiary voltage
Comparator and the 4th voltage comparator；
The first reference voltage generation unit, the second reference voltage generation unit and the 3rd reference voltage generation
The voltage input end of unit connects and constitutes the voltage input end of the threshold voltage generation module altogether, the first reference voltage life
Voltage output end into unit connects the first input end of the second voltage comparator, the second reference voltage generation unit
Voltage output end connect the first input end of the tertiary voltage comparator, the voltage of the 3rd reference voltage generation unit
Output end connects the first input end of the 4th voltage comparator, the second input of the second voltage comparator, the 3rd
Second input of voltage comparator and the second input of the 4th voltage comparator connect altogether with input the outside preset it is defeated
Enter voltage, the output end of the second voltage comparator is the first signal output part of the threshold voltage generation module, described
The output end of tertiary voltage comparator be the threshold voltage generation module secondary signal output end, the 4th voltage ratio compared with
The output end of device is the 3rd signal output part of the threshold voltage generation module；
The first reference voltage generation unit exports the first reference voltage to the second voltage comparator, the second voltage
Comparator exports first threshold voltage logical signal after first reference voltage is compared with the outside predeterminated voltage
To the control module；
The second reference voltage generation unit exports the second reference voltage to the tertiary voltage comparator, the tertiary voltage
Comparator exports second threshold voltage logical signal after second reference voltage is compared with the outside predeterminated voltage
To the control module；
The 3rd reference voltage generation unit exports the 3rd reference voltage to the 4th voltage comparator, the 4th voltage
Comparator exports the 3rd threshold voltage logical signal after the 3rd reference voltage is compared with the outside predeterminated voltage
To the control module；
The control module is according to the first threshold voltage logical signal, the second threshold voltage logical signal and described
3rd threshold voltage logical signal obtains threshold voltage logical signal.
3. boost chip as claimed in claim 2, it is characterised in that the first reference voltage generation unit includes the 3rd electricity
Resistance and the 4th resistance, the first end of the 3rd resistor are the voltage input end of the first reference voltage generation unit, described
Second end of 3rd resistor connects the first end of the 4th resistance and constitutes the voltage of the first reference voltage generation unit
Output end, the second end ground connection of the 4th resistance；
The second reference voltage generation unit includes the 5th resistance and the 6th resistance, and the first end of the 6th resistance is described
The voltage input end of second reference voltage generation unit, the second end of the 6th resistance connects the first end of the 5th resistance
And constitute the voltage output end of the second reference voltage generation unit, the second end ground connection of the 5th resistance；
The 3rd reference voltage generation unit includes the 7th resistance and the 8th resistance, and the first end of the 7th resistance is described
The voltage input end of 3rd reference voltage generation unit, the second end of the 7th resistance connects the first end of the 8th resistance
And constitute the voltage output end of the 3rd reference voltage generation unit, the second end ground connection of the 8th resistance.
4. boost chip as claimed in claim 1, it is characterised in that the boost module includes boost logic unit, first
Switching tube and second switch pipe；
The control end of the boost logic unit is the control end of the boost module, the first output of the boost logic unit
The control end of the end connection first switch pipe, the second output end of the boost logic unit connects the second switch pipe
The input of control end, the input of the first switch pipe and the second switch pipe connects the electricity for constituting the boost module altogether
Input, the output head grounding of the first switch pipe are pressed, the output end of the second switch pipe is the electricity of the boost module
Press output end.
5. boost chip as claimed in claim 1, it is characterised in that the output module is variable including the 9th resistance and the tenth
Resistance；
The first end of 9th resistance is the input and output end of the output module, and the second end of the 9th resistance connects
Connect the first end of the tenth variable resistor, the second end ground connection of the tenth variable resistor, the control of the tenth variable resistor
End processed is the control end of the output module.
6. boost chip as claimed in claim 5, it is characterised in that the switch module include the 5th voltage comparator and
3rd switching tube；
The first voltage input connection reference voltage of 5th voltage comparator, the second electricity of the 5th voltage comparator
Input is pressed to connect the second end of the 9th resistance, the control end of the 5th voltage comparator is the control of the switch module
End processed, the output end of the 5th voltage comparator connects the control end of the 3rd switching tube, the 3rd switching tube it is defeated
Enter input of the end for the switch module, the output end of the 3rd switching tube is the output end of the switch module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510672295.1A CN105226945B (en) | 2015-10-16 | 2015-10-16 | Boost chip |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510672295.1A CN105226945B (en) | 2015-10-16 | 2015-10-16 | Boost chip |
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| Publication Number | Publication Date |
|---|---|
| CN105226945A CN105226945A (en) | 2016-01-06 |
| CN105226945B true CN105226945B (en) | 2017-09-12 |
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| CN201510672295.1A Active CN105226945B (en) | 2015-10-16 | 2015-10-16 | Boost chip |
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| CN105510655A (en) * | 2016-01-26 | 2016-04-20 | 昆山龙腾光电有限公司 | Over-voltage protection circuit and testing power source |
| CN106961214A (en) * | 2017-04-17 | 2017-07-18 | 京东方科技集团股份有限公司 | A kind of boost control circuit, its driving method and display device |
| CN111052576B (en) * | 2017-09-25 | 2021-05-18 | 华为技术有限公司 | Power supply system with reduced bulk capacitance |
| CN111824045B (en) * | 2020-07-14 | 2023-05-12 | 上海创功通讯技术有限公司 | Interface component of vehicle-mounted equipment and vehicle-mounted equipment |
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| CN103457492A (en) * | 2012-08-10 | 2013-12-18 | 成都芯源系统有限公司 | Offline voltage regulator and voltage conversion method thereof |
| CN104052275A (en) * | 2013-03-14 | 2014-09-17 | 马克西姆综合产品公司 | System and Methods for Two-Stage Buck Boost Converters with Fast Transient Response |
| CN104052284A (en) * | 2013-03-13 | 2014-09-17 | 拉碧斯半导体株式会社 | Boost-type switching regulator and semiconductor device for boost-type switching regulator |
| CN205160372U (en) * | 2015-10-16 | 2016-04-13 | 深圳宝砾微电子有限公司 | Boost |
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| JP5146009B2 (en) * | 2008-02-28 | 2013-02-20 | 富士通セミコンダクター株式会社 | Power supply device and power supply method |
| TWI457740B (en) * | 2012-05-07 | 2014-10-21 | Anpec Electronics Corp | Current sensing apparatus and voltage converter apparatus |
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| CN103457492A (en) * | 2012-08-10 | 2013-12-18 | 成都芯源系统有限公司 | Offline voltage regulator and voltage conversion method thereof |
| CN104052284A (en) * | 2013-03-13 | 2014-09-17 | 拉碧斯半导体株式会社 | Boost-type switching regulator and semiconductor device for boost-type switching regulator |
| CN104052275A (en) * | 2013-03-14 | 2014-09-17 | 马克西姆综合产品公司 | System and Methods for Two-Stage Buck Boost Converters with Fast Transient Response |
| CN205160372U (en) * | 2015-10-16 | 2016-04-13 | 深圳宝砾微电子有限公司 | Boost |
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Denomination of invention: Boost chip Effective date of registration: 20190918 Granted publication date: 20170912 Pledgee: Shenzhen SME financing Company limited by guarantee Pledgor: SHENZHEN BAOLI MICROELECTRONICS CO., LTD. Registration number: Y2019990000251 |
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Date of cancellation: 20201120 Granted publication date: 20170912 Pledgee: Shenzhen SME financing Company limited by guarantee Pledgor: SHENZHEWN BAOLI MICROELECTRONICS Co.,Ltd. Registration number: Y2019990000251 |