CN209516910U - A kind of control circuit for boost-buck power managing chip - Google Patents
A kind of control circuit for boost-buck power managing chip Download PDFInfo
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- CN209516910U CN209516910U CN201920278652.XU CN201920278652U CN209516910U CN 209516910 U CN209516910 U CN 209516910U CN 201920278652 U CN201920278652 U CN 201920278652U CN 209516910 U CN209516910 U CN 209516910U
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Abstract
The utility model belongs to electronic circuit technology field, provide a kind of control circuit for boost-buck power managing chip, optimize voltage by output after carrying out transformation processing to input voltage, then trigger signal is exported according to the first comparison signal, the second comparison signal and driving signal, and the action state of multiple switch unit in voltage changing module is controlled, to adjust the optimization voltage.From there through the action state of multiple switch unit in control voltage changing module, optimize voltage to adjust, realize the loop stability that boost or depressurization time control coremaking piece is carried out to input voltage, and output ripple is smaller, the higher effect of its transfer efficiency, solve the existing control technology for boost-buck power managing chip there is when input voltage close to output voltage time control coremaking piece loop it is unstable, the larger problem for causing transfer efficiency low of output ripple.
Description
Technical field
The utility model belongs to electronic circuit technology field more particularly to a kind of control for boost-buck power managing chip
Circuit processed.
Background technique
Currently, have the power supply product of QC fast charge protocol or PD fast charge protocol input voltage greater than, equal to
Or less than in all power supply application scenarios of output voltage.The controlling party of buck is mainly used when due to wide range input
Formula, and export voltage required for power receiving equipment, but when input voltage is close to output voltage, it can lead to the problem of, such as:
The loop of control chip is unstable, output ripple is larger causes power receiving equipment to be unable to normal use, circuit generation sound in charging
Frequency noise leads to power supply product and power receiving equipment damage etc..
Therefore, there is when the close output electricity of input voltage for the existing control technology for boost-buck power managing chip
Press the loop of time control coremaking piece unstable, the larger problem for causing transfer efficiency low of output ripple.
Utility model content
The purpose of this utility model is to provide a kind of control circuits for boost-buck power managing chip, it is intended to solve
There is work as input voltage close to output voltage time control coremaking piece for the existing control technology for boost-buck power managing chip
Loop it is unstable, the larger problem for causing transfer efficiency low of output ripple.
The utility model provides a kind of control circuit for boost-buck power managing chip, the control circuit packet
It includes:
For receiving input voltage, and the transformation mould of output optimization voltage after transformation processing is carried out to the input voltage
Block；
It is connect with the voltage changing module, for being exported according to the first comparison signal, the second comparison signal and driving signal
Trigger signal, and the action state of multiple switch unit in the voltage changing module is controlled, to adjust the triggering of the optimization voltage
Module；
It is connect with the voltage changing module and the trigger module, for being exported after carrying out signal processing to the trigger signal
First comparison voltage, and the first comparison module of first comparison signal is exported after being compared with the optimization voltage；
It is connect with the voltage changing module and the trigger module, for being exported after carrying out signal processing to the trigger signal
Second comparison voltage, and the second comparison module of second comparison signal is exported after being compared with the optimization voltage；With
And
It is connect with the trigger module, for being compared to the optimization voltage with reference voltage, and in conjunction with to described
Input voltage carries out partial pressure comparison, with the control module of output drive signal.
A kind of control circuit for boost-buck power managing chip provided by the utility model, by input voltage into
Output optimization voltage, then exports according to the first comparison signal, the second comparison signal and driving signal and touches after the processing of row transformation
It signals, and controls the action state of multiple switch unit in voltage changing module, to adjust the optimization voltage；Wherein, the first ratio
It is to export the first comparison voltage after carrying out signal processing to trigger signal, and obtain after being compared with optimization voltage compared with signal
, the second comparison signal is the second comparison voltage to be exported after carrying out signal processing to trigger signal, and compared with optimization voltage
It obtains more afterwards, driving signal is compared optimization voltage with reference voltage, and combines and carry out partial pressure comparison to input voltage
It obtains afterwards.It is realized pair from there through the action state of multiple switch unit in control voltage changing module with adjusting optimization voltage
Input voltage carries out the loop stability of boost or depressurization time control coremaking piece, and output ripple is smaller, and transfer efficiency is higher
Effect, solving the existing control technology for boost-buck power managing chip, there is work as input voltage close to output voltage
The loop of time control coremaking piece is unstable, the larger problem for causing transfer efficiency low of output ripple.
Detailed description of the invention
Fig. 1 is a kind of mould for control circuit for boost-buck power managing chip that an embodiment of the present invention provides
Block structure schematic diagram.
Fig. 2 is a kind of showing for control circuit for boost-buck power managing chip that an embodiment of the present invention provides
Example circuit diagram.
Fig. 3 be an embodiment of the present invention provide a kind of control circuit for boost-buck power managing chip in
When buck-boost mode by switch periods T point for three periods when voltage change curve synoptic diagram.
Specific embodiment
In order to make the purpose of the utility model, technical solutions and advantages more clearly understood, below in conjunction with attached drawing and implementation
Example, the present invention will be further described in detail.It should be appreciated that specific embodiment described herein is only used to explain
The utility model is not used to limit the utility model.
Above-mentioned a kind of control circuit for boost-buck power managing chip, by carrying out transformation processing to input voltage
Output optimization voltage afterwards, then exports trigger signal according to the first comparison signal, the second comparison signal and driving signal, and control
The action state of multiple switch unit in voltage changing module processed, to adjust the optimization voltage；Wherein, the first comparison signal is to touching
It signals to export the first comparison voltage after carrying out signal processing, and obtained after being compared with optimization voltage, second compares letter
Number to export the second comparison voltage after carrying out signal processing to trigger signal, and obtained after being compared with optimization voltage, it drives
Dynamic signal is compared optimization voltage with reference voltage, and obtains more afterwards in conjunction with being divided to input voltage.Thus
It realizes and input voltage is carried out to adjust optimization voltage by the action state of multiple switch unit in control voltage changing module
The loop stability of boost or depressurization time control coremaking piece, and output ripple is smaller, the higher effect of transfer efficiency.
Fig. 1 shows a kind of control circuit for boost-buck power managing chip of an embodiment of the present invention offer
Modular structure, for ease of description, only the parts related to this embodiment are shown, and details are as follows:
A kind of above-mentioned control circuit for boost-buck power managing chip, including voltage changing module 101, trigger module 102,
First comparison module 103, the second comparison module 104 and control module 105.
Voltage changing module 101 exports optimization voltage for receiving input voltage, and after carrying out transformation processing to input voltage.
Trigger module 102 is connect with voltage changing module 101, for according to the first comparison signal, the second comparison signal and drive
Dynamic signal exports trigger signal, and controls the action state of multiple switch unit in voltage changing module 101, to adjust optimization voltage.
First comparison module 103 is connect with voltage changing module 101 and trigger module 102, for carrying out signal to trigger signal
The first comparison voltage is exported after processing, and exports first comparison signal after being compared with optimization voltage.
Second comparison module 104 is connect with voltage changing module 101 and trigger module 102, for carrying out signal to trigger signal
The second comparison voltage is exported after processing, and exports second comparison signal after being compared with optimization voltage.
Control module 105 is connect with trigger module 102, for being compared to optimization voltage with reference voltage, and is combined
Partial pressure comparison is carried out to input voltage, with output drive signal.
Specifically, above-mentioned voltage changing module 101 to input voltage carry out transformation processing include boosting processing, decompression processing and
Buck processing.
In one embodiment, due to being provided with trigger module 102, and trigger module 102 is according to the first comparison module 103
The driving that first comparison signal of output, the second comparison signal of the second comparison module 104 output and control module 105 export
Signal exports trigger signal, and controls the action state of multiple switch unit in voltage changing module 101, to adjust optimization voltage.By
This makes even when input voltage is also at stable state, trigger module 102 close to the loop of output voltage time control coremaking piece
For boost-buck power managing chip duty cycle unique time algorithm is used for, fast with load response speed, underloading is imitated
Rate is high, the effect of continuous mode and discontinuous mode transitions smooth.
Fig. 2 shows a kind of control circuits for boost-buck power managing chip that an embodiment of the present invention provides
Exemplary circuit, for ease of description, only the parts related to this embodiment are shown, and details are as follows:
As an embodiment of the present invention, multiple switch units in above-mentioned voltage changing module 101 are opened including first
Close unit 1011, second switch unit 1012, third switch unit 1013 and the 4th switch unit 1014；
First switch unit 1011, second switch unit 1012, third switch unit 1013 and the 4th switch unit
1014 are respectively adopted the first field-effect tube Q1, the second field-effect tube Q2, third field-effect tube Q3 and the 4th field-effect tube Q4 reality
It is existing.
As an embodiment of the present invention, above-mentioned voltage changing module 101 further includes first resistor R1, second resistance R2,
One capacitor C1, the second capacitor C2 and the first inductance L1；
The first end of first capacitor C1 and the first end of first resistor R1 access input voltage, the second end of first resistor R1
Connect the drain electrode of the first field-effect tube Q1, the drain electrode of the source electrode of the first field-effect tube Q1 and the second field-effect tube Q2 and the first inductance
The first end of L1 connects altogether, the second end of the first inductance L1 and the drain electrode of third field-effect tube Q3 and the source of the 4th field-effect tube Q4
It extremely connects altogether, the source electrode of the second field-effect tube Q2 and the source electrode of third field-effect tube Q3 are grounded, and the drain electrode of the 4th field-effect tube Q4 connects
The first end of second resistance R2, the first end of second the second capacitor C2 of termination of second resistance R2, the second end of first capacitor C1
It is grounded with the second end of the second capacitor C2.
As an embodiment of the present invention, above-mentioned trigger module 102 includes the first control chip U1, the second control chip
U2, the first trigger RS1 and the second trigger RS2；
The S of first trigger RS1 terminates the end S of the second trigger RS2, Q termination the first control core of the first trigger RS1
The first output end X1 of the controlled end V1, the first control chip U1 of piece U1 connect the grid of the first field-effect tube Q1, the first control core
The second output terminal X2 of piece U1 connects the grid of the second field-effect tube Q2, the second control of Q termination chip U2's of the second trigger RS2
The first output end X1 of controlled end V1, the second control chip U2 connect the grid of third field-effect tube Q3, the second control chip U2's
Second output terminal X2 connects the grid of the 4th field-effect tube Q4.
Wherein, the first trigger RS1 and the second trigger RS2 is rest-set flip-flop.
As an embodiment of the present invention, above-mentioned first comparison module 103 include current source Is, first voltage source E1,
First switch tube S1, second switch S2, third switching tube S3, third capacitor C3, first comparator OP1 and with door And1；
The input terminal of the output termination first switch tube S1 of current source Is, output end, the second switch of first switch tube S1
The output end of pipe S2, the input terminal of third switching tube S3, the positive of the first end of third capacitor C3 and first comparator OP1 are defeated
Enter end connect altogether, first voltage source E1 output termination second switch S2 input terminal, the controlled end of first switch tube S1 with
The first input end of door And1 connects the end Q of the first trigger R1, hanging with the second input terminal of door And1, third switching tube S3's
The second end of output end and third capacitor C3 are grounded, the end Q of the second trigger of controlled termination RS2 of second switch S2, and first
The inverting input terminal access optimization voltage of comparator OP1, the output end in contact of first comparator OP1 send out module 102.
Specifically, above-mentioned first switch tube S1, second switch S2 and third switching tube S3 can be used triode or
Person's field-effect tube is realized.
As an embodiment of the present invention, above-mentioned second comparison module 104 includes the 4th switching tube S4, the 5th switching tube
S5, the 4th capacitor C4, the second voltage source E2 and third comparator OP3；
The input terminal access optimization voltage of 4th switching tube S4, the output end of the 4th switching tube S4, the second voltage source E2
The positive of the inverting input terminal of input terminal, the first end of the 4th capacitor C4 and third comparator OP3, third comparator OP3 is defeated
Enter to terminate into input voltage, the input terminal of the 5th switching tube S5 of output termination of the second voltage source E2, the 5th switching tube S5's is defeated
Outlet and the second end of the 4th capacitor C4 are grounded, the controlled end of the 4th switching tube S4 and the controlled termination second of the 5th switching tube S5
The end Q of trigger RS2.
Specifically, triode can be used in above-mentioned 4th switching tube S4 and the 5th switching tube S5 or field-effect tube is realized.
As described above be used for boost-buck power managing chip, when working in decompression mode and when boost mode
Working principle is as follows:
1, decompression mode
As VOUT < 0.9*VIN, TON_BOOST 0, i.e. third field-effect tube Q3 shutdown, the first field-effect tube Q1's is opened
Close charge and discharge time of the time equal to third capacitor C3.
Specific formula is as follows:
VO<0.9*VIN.
Ton_Boost=0.
Ton_Buck=(Vout/VIN) * RC.
T=RC
2, boost mode
As VOUT > 1.1*VIN, TON_Buck 1, i.e. the first field-effect tube Q1 normal open, third field-effect tube Q3's is opened
Close charge and discharge time of the time depending on the 4th capacitor C4.
Specific formula is as follows:
VO>1.1*VIN,
Ton_Buck=1.
Ton_Boost=(VO-VIN) * RC/VOUT.
T=RC
Fig. 3 shows a kind of control circuit for boost-buck power managing chip of an embodiment of the present invention offer
In in buck-boost mode by switch periods T point for three periods when voltage change illustrate only and this for ease of description
The relevant part of embodiment, details are as follows:
In the T1 period: when VIN has voltage access, the 4th switching tube S4 is connected to charge to the 4th capacitor C4.And the 5th
The FB level of comparator OP5 is lower than reference voltage VREF, and the 5th comparator OP5 exports high level, at this time the first field-effect tube Q1
It is connected with third field-effect tube Q3, the second field-effect tube Q2 and the 4th field-effect tube Q4 shutdown.First switch tube S1 and the simultaneously
Two switching tube S2 conducting, charges to third capacitor C3.
In the T2 period: when the level of the 4th capacitor C4 is greater than the VIN level of third comparator OP3, third field-effect
Pipe Q3 shutdown, the 4th field-effect tube Q4 conducting.Second switch S2 is disconnected simultaneously, and first switch tube S1 continues conducting and gives third electricity
Hold C3 charging.First field-effect tube Q1 and the 4th field-effect tube Q4 conducting at this time, the second field-effect tube Q2 and third field-effect tube
Q3 shutdown.
In the T3 period: when the level of third capacitor C3 is greater than VOUT, the first field-effect tube Q1 shutdown, the second field-effect
Pipe Q2 conducting, while third switching tube S3 is connected and discharges to third capacitor C3, the second field-effect tube Q2 and the 4th field-effect at this time
Pipe Q4 conducting, the first field-effect tube Q1 and third field-effect tube Q3 shutdown.
Specifically, T1=Ton_Boost, T1+T2=Ton_Buck, T1+T2+T3=T.
(VOUT/R) * T1+VIN/R* (T1+T2)=VOUT*C.
VIN/L*T1+ (VIN-VOUT)/L*T2-VOUT/L*T3=0.
So: VO*T1+VIN* (T1+T2)=VOUT*RC
VIN* (T1+T2)=VOUT* (T2+T3)
VOUT* (T1+T2+T3)=VOUT*RC.T=T1+T2+T3=RC
Certainly, a kind of above-mentioned control circuit for boost-buck power managing chip has bidirectional operation mode, works as VOUT
End becomes inputting, and when the end VIN becomes output, repeats above-mentioned processing mode, the VOUT of interdependent node is only become VIN,
VIN becomes VOUT.
To sum up, a kind of control circuit for boost-buck power managing chip provided by the embodiment of the utility model, passes through
Output optimizes voltage after carrying out transformation processing to input voltage, then according to the first comparison signal, the second comparison signal and drive
Dynamic signal exports trigger signal, and controls the action state of multiple switch unit in voltage changing module, to adjust the optimization voltage；
Wherein, the first comparison signal is the first comparison voltage to be exported after carrying out signal processing to trigger signal, and carry out with optimization voltage
Obtain more afterwards, the second comparison signal be export the second comparison voltage after carrying out signal processing to trigger signal, and with optimization
What voltage obtained after being compared, driving signal is compared with reference voltage optimization voltage, and in conjunction with to input voltage into
Row partial pressure obtains more afterwards.From there through the action state of multiple switch unit in control voltage changing module, to adjust optimization electricity
Pressure realizes the loop stability that boost or depressurization time control coremaking piece is carried out to input voltage, and output ripple is smaller, conversion
The higher effect of efficiency, solving the existing control technology for boost-buck power managing chip, there is when input voltage connects
The loop of nearly output voltage time control coremaking piece is unstable, the larger problem for causing transfer efficiency low of output ripple.
The above is only the preferred embodiment of the utility model only, is not intended to limit the utility model, all at this
Made any modifications, equivalent replacements, and improvements etc., should be included in the utility model within the spirit and principle of utility model
Protection scope within.
Claims (7)
1. a kind of control circuit for boost-buck power managing chip, which is characterized in that the control circuit includes:
For receiving input voltage, and the voltage changing module of output optimization voltage after transformation processing is carried out to the input voltage；
It connect with the voltage changing module, is triggered for being exported according to the first comparison signal, the second comparison signal and driving signal
Signal, and the action state of multiple switch unit in the voltage changing module is controlled, to adjust the trigger module of the optimization voltage；
It is connect with the voltage changing module and the trigger module, for exporting first after carrying out signal processing to the trigger signal
Comparison voltage, and the first comparison module of first comparison signal is exported after being compared with the optimization voltage；
It is connect with the voltage changing module and the trigger module, for exporting second after carrying out signal processing to the trigger signal
Comparison voltage, and the second comparison module of second comparison signal is exported after being compared with the optimization voltage；And
It is connect with the trigger module, for being compared to the optimization voltage with reference voltage, and in conjunction with to the input
Voltage carries out partial pressure comparison, with the control module of output drive signal.
2. control circuit as described in claim 1, which is characterized in that multiple switch unit packets in the voltage changing module
It includes:
First switch unit, second switch unit, third switch unit and the 4th switch unit；
The first switch unit, the second switch unit, the third switch unit and the 4th switch unit point
It Cai Yong not the first field-effect tube, the second field-effect tube, third field-effect tube and the realization of the 4th field-effect tube.
3. control circuit as claimed in claim 2, which is characterized in that the voltage changing module further include:
First resistor, second resistance, first capacitor, the second capacitor and the first inductance；
The first end of the first end of the first capacitor and the first resistor accesses the input voltage, the first resistor
The drain electrode of second termination first field-effect tube, the drain electrode of the source electrode of first field-effect tube and second field-effect tube
And the first end of first inductance connects altogether, the drain electrode of the second end of first inductance and the third field-effect tube and
The source electrode of 4th field-effect tube connects altogether, and the source electrode of second field-effect tube and the source electrode of the third field-effect tube connect
Ground, the drain electrode of the 4th field-effect tube connect the first end of the second resistance, the second termination of the second resistance described the
The second end of the first end of two capacitors, the second end of the first capacitor and second capacitor is grounded.
4. control circuit as claimed in claim 3, which is characterized in that the trigger module includes:
First control chip, the second control chip, the first trigger and the second trigger；
The S of first trigger terminates the end S of second trigger, first control of the Q termination of first trigger
The controlled end of coremaking piece, the grid of the first output termination first field-effect tube of the first control chip, described first
The second output terminal of control chip connects the grid of second field-effect tube, second control of the Q termination of second trigger
The controlled end of coremaking piece, the grid of the first output termination third field-effect tube of the second control chip, described second
The second output terminal of control chip connects the grid of the 4th field-effect tube.
5. control circuit as claimed in claim 4, which is characterized in that first comparison module includes:
Current source, first voltage source, first switch tube, second switch, third switching tube, third capacitor, first comparator with
And with door；
The output of the current source terminates the input terminal of the first switch tube, the output end of the first switch tube, described the
The output end of two switching tubes, the input terminal of the third switching tube, the first end of the third capacitor and described first are compared
The normal phase input end of device connects altogether, and the output of the first voltage source terminates the input terminal of the second switch, and described first opens
The controlled end and described and door first input end that close pipe connect the end Q of first trigger, second input terminal with door
Vacantly, the second end of the output end of the third switching tube and the third capacitor is grounded, the controlled end of the second switch
The end Q of second trigger is connect, the inverting input terminal of the first comparator accesses the optimization voltage, and described first compares
The output of device terminates the trigger module.
6. control circuit as claimed in claim 4, which is characterized in that second comparison module includes:
4th switching tube, the 5th switching tube, the 4th capacitor, the second voltage source and third comparator；
The input terminal of 4th switching tube accesses the optimization voltage, the output end of the 4th switching tube, second electricity
The inverting input terminal of the input terminal of potential source, the first end of the 4th capacitor and the third comparator, the third compare
The normal phase input end of device accesses the input voltage, and the output of the second voltage source terminates the input of the 5th switching tube
The second end of end, the output end of the 5th switching tube and the 4th capacitor is grounded, the controlled end of the 4th switching tube with
The end Q of controlled termination second trigger of 5th switching tube.
7. control circuit as claimed in claim 4, which is characterized in that the control module includes:
Second comparator, the 4th comparator, the 5th comparator, 3rd resistor, the 4th resistance, the 5th resistance, the 5th capacitor and
6th capacitor；
The first end of the 3rd resistor accesses the optimization voltage, the second end of the 3rd resistor and the 4th resistance
First end and the inverting input terminal of the 5th comparator connect altogether, and the normal phase input end of the 5th comparator connects the benchmark
Voltage, the output end of the 5th comparator, the first end of the 5th resistance, the first end of the 5th capacitor and described
The normal phase input end of 4th comparator connects altogether, the first end of the second termination the 6th capacitor of the 5th resistance, and described the
The second end of the second end and the 6th capacitor of the second end of four resistance and the 5th capacitor is grounded, and described second compares
The normal phase input end of device connects the first end of the first resistor, and the anti-phase input of second comparator terminates the first resistor
Second end, the output of second comparator terminates the inverting input terminal of the 4th comparator, the 4th comparator
Output end connects altogether with the end S of first trigger and the end S of second trigger.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920278652.XU CN209516910U (en) | 2019-03-05 | 2019-03-05 | A kind of control circuit for boost-buck power managing chip |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920278652.XU CN209516910U (en) | 2019-03-05 | 2019-03-05 | A kind of control circuit for boost-buck power managing chip |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109861500A (en) * | 2019-03-05 | 2019-06-07 | 深圳宝砾微电子有限公司 | A kind of control circuit and control method for boost-buck power managing chip |
| US20230038599A1 (en) * | 2021-08-03 | 2023-02-09 | Potens Semiconductor Corp. | Electromagnetic interference regulator by use of capacitive parameters of field-effect transistor |
| TWI852288B (en) * | 2023-01-13 | 2024-08-11 | 華碩電腦股份有限公司 | Electronic device and charging method thereof |
-
2019
- 2019-03-05 CN CN201920278652.XU patent/CN209516910U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109861500A (en) * | 2019-03-05 | 2019-06-07 | 深圳宝砾微电子有限公司 | A kind of control circuit and control method for boost-buck power managing chip |
| CN109861500B (en) * | 2019-03-05 | 2023-12-29 | 深圳宝砾微电子有限公司 | Control circuit and control method for buck-boost power management chip |
| US20230038599A1 (en) * | 2021-08-03 | 2023-02-09 | Potens Semiconductor Corp. | Electromagnetic interference regulator by use of capacitive parameters of field-effect transistor |
| US11804834B2 (en) * | 2021-08-03 | 2023-10-31 | Potens Semiconductor Corp. | Electromagnetic interference regulator by use of capacitive parameters of field-effect transistor |
| TWI852288B (en) * | 2023-01-13 | 2024-08-11 | 華碩電腦股份有限公司 | Electronic device and charging method thereof |
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