CN107834828A - Reduce the circuit and power supply of power-supply ripple - Google Patents
Reduce the circuit and power supply of power-supply ripple Download PDFInfo
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- CN107834828A CN107834828A CN201711107823.4A CN201711107823A CN107834828A CN 107834828 A CN107834828 A CN 107834828A CN 201711107823 A CN201711107823 A CN 201711107823A CN 107834828 A CN107834828 A CN 107834828A
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- power supply
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- voltage
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/14—Arrangements for reducing ripples from dc input or output
Abstract
The disclosure is directed to reduce the circuit and power supply of power-supply ripple.This method includes：The voltage output end of power supply chip and one end of energy-storage module connect；One end of the other end of energy-storage module one end with division module, one end of filtration module and load respectively is connected；The other end of division module and one end of the feedback signal sampling end of power supply chip and sampling module connect；The other end of sampling module is connected and is grounded with the earth terminal of power supply chip；One end of Voltage stabilizing module is connected with one end of energy-storage module, and the other end of Voltage stabilizing module is connected with the other end of division module, and Voltage stabilizing module is used to keep the voltage at division module both ends constant in the change of power consumption of load.In the case of the power consumption mutation of load, Voltage stabilizing module can keep the voltage at division module both ends constant, so that the voltage at sampling module both ends and change rapidly, power supply chip can respond rapidly according to sampled signal, effectively improve the speed of power supply chip dynamic response.
Description
Technical field
This disclosure relates to electronic technology field, more particularly to reduce the circuit and power supply of power-supply ripple.
Background technology
With the development of modern switch power technology, linear power supply is gradually small by weight, and capacity is big, the high switch of output quality
Power supply is substituted, and Switching Power Supply is to utilize modern power electronics technology, the time ratio that controlling switch pipe turns on and off, and is maintained
A kind of power supply of regulated output voltage.Switching Power Supply is compared with linear power supply, although weight is small, capacity is big, and output quality is high,
Ripple factor is generally larger.But ripple factor is an important indicator of Switching Power Supply again, if ripple is big, Jiu Huiying
The normal work of Switching Power Supply load is rung, amplifier noise, electromagnetic interference (Electromagnetic can be brought
Interference, referred to as：EMI) the problems such as noise.
The content of the invention
To overcome problem present in correlation technique, the embodiment of the present disclosure provides the circuit and power supply for reducing power-supply ripple.
The technical scheme is as follows：
According to the first aspect of the embodiment of the present disclosure, there is provided a kind of circuit for reducing power-supply ripple, including：
The voltage output end of power supply chip and one end of energy-storage module connect；
The other end of the energy-storage module respectively one end with division module, one end of filtration module and load one end connect
Connect；
The other end of the division module connects with the feedback signal sampling end of the power supply chip and one end of sampling module
Connect；
The other end of the sampling module is connected and is grounded with the earth terminal of the power supply chip；
One end of Voltage stabilizing module is connected with one end of the energy-storage module, the other end of the Voltage stabilizing module with described point
The other end of die block is connected, and the Voltage stabilizing module is used to keep the division module two in the change of power consumption of the load
The voltage at end is constant.
The technical scheme provided by this disclosed embodiment can include the following benefits：The voltage output end of power supply chip
It is connected with one end of energy-storage module；The other end of energy-storage module one end with division module, one end of filtration module and negative respectively
One end connection of load；The other end of division module and one end of the feedback signal sampling end of power supply chip and sampling module connect；
The other end of sampling module is connected and is grounded with the earth terminal of power supply chip；One end of Voltage stabilizing module and one end of energy-storage module
It is connected, the other end of Voltage stabilizing module is connected with the other end of division module, and Voltage stabilizing module is used for the change of power consumption in load
When keep the voltage at division module both ends constant.Wherein, in the case of the power consumption mutation of load, Voltage stabilizing module can be kept point
The voltage at die block both ends is constant, so that the voltage at sampling module both ends changes rapidly with the power consumption mutation of load,
So that power supply chip can respond rapidly according to the sampled signal of the feedback signal sampling end of power supply chip, effectively carry
The speed of power supply chip dynamic response is risen.
In one embodiment, the Voltage stabilizing module includes：Electric capacity of voltage regulation；One end of the Voltage stabilizing module and the energy storage
One end of module is connected, and the other end of the Voltage stabilizing module is connected with the other end of the division module, including：
One end of the electric capacity of voltage regulation is connected with one end of the energy-storage module, the other end of the electric capacity of voltage regulation and institute
The other end for stating division module is connected.
In one embodiment, the electric capacity of voltage regulation is PF level electric capacity.
In one embodiment, the energy-storage module includes：Energy storage inductor；The voltage output end of the power supply chip and storage
One end connection of energy module, including：
The voltage output end of the power supply chip and one end of energy storage inductor connect；
One end of the energy-storage module respectively one end with division module, one end of filtration module and load one end connect
Connect, including：
The other end of the energy storage inductor respectively one end with division module, one end of filtration module and load one end connect
Connect.
In one embodiment, the division module includes：Divider resistance；The other end of the energy-storage module is respectively with dividing
One end of die block, one end of filtration module connect with one end of load, including：
The other end of the energy-storage module respectively one end with divider resistance, one end of filtration module and load one end connect
Connect；
The other end of the division module connects with the feedback signal sampling end of the power supply chip and one end of sampling module
Connect, including：
The other end of the divider resistance connects with the feedback signal sampling end of the power supply chip and one end of sampling module
Connect
One end of the Voltage stabilizing module is connected with one end of the energy-storage module, the other end of the Voltage stabilizing module and institute
The other end for stating division module is connected, including：
One end of the Voltage stabilizing module is connected with one end of the energy-storage module, the other end of the Voltage stabilizing module and institute
The other end for stating divider resistance is connected.
In one embodiment, the filtration module includes：Filter capacitor；The other end of the energy-storage module is respectively with dividing
One end of die block, one end of filtration module connect with one end of load, including：
The other end of the energy-storage module respectively one end with division module, one end of filter capacitor and load one end connect
Connect；
The other end ground connection of the filter capacitor.
In one embodiment, the sampling module includes sampling resistor；The other end of the division module and the electricity
The feedback signal sampling end of source chip connects with one end of sampling module, including：
The one of the feedback signal sampling end and the sampling resistor of the other end of the division module and the power supply chip
End connection；
The other end of the sampling module is connected and is grounded with the earth terminal of the power supply chip, including：
The other end of the sampling resistor is connected and is grounded with the earth terminal of the power supply chip.
In one embodiment, any frequency of the switching frequency of the power supply chip between 100KHZ-10MHZ.
According to the second aspect of the embodiment of the present disclosure, there is provided a kind of power supply, including the reduction described in any of the above-described embodiment
The circuit of power-supply ripple.
It should be appreciated that the general description and following detailed description of the above are only exemplary and explanatory, not
The disclosure can be limited.
Brief description of the drawings
Accompanying drawing herein is merged in specification and forms the part of this specification, shows the implementation for meeting the disclosure
Example, and be used to together with specification to explain the principle of the disclosure.
Fig. 1 is a kind of schematic diagram of the circuit of reduction power-supply ripple according to an exemplary embodiment one.
Fig. 2 is a kind of schematic diagram of the circuit of reduction power-supply ripple according to an exemplary embodiment two.
Embodiment
Here exemplary embodiment will be illustrated in detail, its example is illustrated in the accompanying drawings.Following description is related to
During accompanying drawing, unless otherwise indicated, the same numbers in different accompanying drawings represent same or analogous key element.Following exemplary embodiment
Described in embodiment do not represent all embodiments consistent with the disclosure.On the contrary, they be only with it is such as appended
The example of the consistent apparatus and method of some aspects be described in detail in claims, the disclosure.
Fig. 1 is a kind of schematic diagram of the circuit of reduction power-supply ripple according to an exemplary embodiment one, such as Fig. 1 institutes
Show, the circuit includes：Power supply chip 11, energy-storage module 12, division module 13, filtration module 14, sampling module 15 and voltage stabilizing mould
Block 16；
Wherein, the voltage output end of power supply chip 11 is connected with one end of energy-storage module 12；
One end of the other end of energy-storage module 12 one end with division module 13, one end of filtration module 14 and load respectively
Connection；
The other end of division module 13 is connected with the feedback signal sampling end of power supply chip 11 and one end of sampling module 15；
The other end of sampling module 15 is connected and is grounded with the earth terminal of power supply chip 11；
One end of Voltage stabilizing module 16 is connected with one end of energy-storage module 12, the other end and division module of Voltage stabilizing module 16
13 other end is connected, and Voltage stabilizing module 16 is used to keep the voltage at the both ends of division module 13 not in the change of power consumption of load
Become.
When the change of power consumption of load, the magnitude of voltage of input to load can also change accordingly, then now, it is necessary to electricity
Source chip 11 timely adjusts input to the magnitude of voltage of load, and with proof load normal operation, and power supply chip 11 is based on load
The change of the power consumption magnitude of voltage that timely adjustment input extremely loads is typically embodied by the dynamic response of power supply chip 11.Power supply chip
The speed of 11 dynamic response is fast, when the power consumption of ability proof load is mutated, the magnitude of voltage of the input of power supply chip 11 to load
Equally meets the needs of now loading.
Example, when load is WIFI, namely now power supply chip 11 is WIFI chip power supplies.Because at WIFI chips
It is very big in the power consumption difference of reception state and emission state, it is therefore desirable to the dynamic to the power supply chip 11 of WIFI chip power supplies
Response just needs very fast.If the dynamic responding speed of power supply chip 11 is slower, when WIFI chips are converted to by reception state
During emission state, the voltage pulsation inputted to WIFI chips can be larger, thus can be on WIFI chips work produce it is certain influence,
Such as：The receiving sensitivity of WIFI chips can be reduced.
In the disclosure, by giving division module 13 Voltage stabilizing module 16 in parallel, so as to when the change of power consumption of load, protect
It is constant to hold the voltage at the both ends of division module 13, because division module 13 is connected with sampling module 15, due to division module 13
The voltage at both ends keeps constant, then, the voltage of sampling module 15 can lower rapidly, so as to when the feedback signal of power supply chip 11
After sampling end receives the signal that this is changed greatly, it can respond immediately, so as to add the dynamic response of power supply chip 11
Speed.
Such as：When the input voltage of load is 2V, and sampling module 15 is identical with the resistance of division module 13, then this
When, the voltage at the both ends of sampling module 15 is 1V, and the voltage at the both ends of division module 13 is also 1V, when load input voltage down for
During 1V, due to division module 13 has the electric capacity of parallel connection, now, the voltage at the both ends of division module 13 is maintained at 1V, then,
The voltage at the both ends of sampling module 15 is just changed into 0V, so as to which the feedback signal sampling end when power supply chip 11 receives sampling module 15
When the voltage at both ends is just changed into 0V, 0V response can be made immediately, and power supply chip 11 will can input to the voltage of load immediately
Row adjustment, it ensure that the voltage of now input to load is adjusted to 1V.
It is worth noting that, the sampled signal that above-mentioned power supply chip 11 samples to feedback signal sampling end in response to phase
It is identical in the technology of pass, that is, different sampled signals corresponds to different response ranks, example, the value of sampled signal is more big right
The response speed answered is slower.
The technical scheme provided by this disclosed embodiment can include the following benefits：The voltage output end of power supply chip
It is connected with one end of energy-storage module；The other end of energy-storage module one end with division module, one end of filtration module and negative respectively
One end connection of load；The other end of division module and one end of the feedback signal sampling end of power supply chip and sampling module connect；
The other end of sampling module is connected and is grounded with the earth terminal of power supply chip；One end of Voltage stabilizing module and one end of energy-storage module
It is connected, the other end of Voltage stabilizing module is connected with the other end of division module, and Voltage stabilizing module is used for the change of power consumption in load
When keep the voltage at division module both ends constant.Wherein, in the case of the power consumption mutation of load, Voltage stabilizing module can be kept point
The voltage at die block both ends is constant, so that the voltage at sampling module both ends changes rapidly with the power consumption mutation of load,
So that power supply chip can respond rapidly according to the sampled signal of the feedback signal sampling end of power supply chip, effectively carry
The speed of power supply chip dynamic response is risen.
In one embodiment, as shown in Fig. 2 above-mentioned Voltage stabilizing module 16 includes：Electric capacity of voltage regulation C1；Voltage stabilizing module 16
One end is connected with one end of energy-storage module 12, and the other end of Voltage stabilizing module 16 is connected with the other end of division module 13, bag
Include：
Electric capacity of voltage regulation C1 one end is connected with one end of energy-storage module 12, electric capacity of voltage regulation the C1 other end and division module
13 other end is connected.
Due to the advantage of electric capacity function itself, and can be constant with maintenance voltage, therefore, in the disclosure, above-mentioned voltage stabilizing electricity
Appearance C1 is electric capacity.
The technical scheme provided by this disclosed embodiment can include the following benefits：Realized by using electric capacity of voltage regulation
The function of Voltage stabilizing module, it can effectively reduce cost.
In one embodiment, electric capacity of voltage regulation C1 is PF level electric capacity.
Example, can be 10PF patch capacitor.
In one embodiment, as shown in Fig. 2 above-mentioned energy-storage module 12 includes：Energy storage inductor L；Power supply chip 11
Voltage output end is connected with one end of energy-storage module 12, including：
The voltage output end of power supply chip 11 is connected with energy storage inductor L one end；
One end of energy-storage module 12 respectively one end with division module 13, one end of filtration module 14 and load one end connect
Connect, including：
One end of the energy storage inductor L other end one end with division module 13, one end of filtration module 14 and load respectively
Connection.
The technical scheme provided by this disclosed embodiment can include the following benefits：Realized by using energy storage inductor
The function of energy-storage module, it can effectively reduce cost.
In one embodiment, as shown in Fig. 2 above-mentioned division module 13 includes：Divider resistance R1；Energy-storage module 12
One end of the other end one end with division module 13, one end of filtration module 14 and load respectively is connected, including：
One end of the other end of energy-storage module 12 one end with divider resistance R1, one end of filtration module 14 and load respectively
Connection；
The other end of division module 13 is connected with the feedback signal sampling end of power supply chip 11 and one end of sampling module 15,
Including：
The divider resistance R1 other end is connected with the feedback signal sampling end of power supply chip 11 and one end of sampling module 15
One end of Voltage stabilizing module 16 is connected with one end of energy-storage module 12, the other end and division module of Voltage stabilizing module 16
13 other end is connected, including：
One end of Voltage stabilizing module 16 is connected with one end of energy-storage module 12, the other end and divider resistance of Voltage stabilizing module 16
The R1 other end is connected.
The technical scheme provided by this disclosed embodiment can include the following benefits：Realized by using divider resistance
The function of division module, it can effectively reduce cost.
In one embodiment, as shown in Fig. 2 above-mentioned filtration module 14 includes：Filter capacitor C2；Energy-storage module 12
One end of the other end one end with division module 13, one end of filtration module 14 and load respectively is connected, including：
One end of the other end of energy-storage module 12 one end with division module 13, filter capacitor C2 one end and load respectively
Connection；
Filter capacitor C2 other end ground connection.
The technical scheme provided by this disclosed embodiment can include the following benefits：Realized by using filter capacitor
The function of filtration module, it can effectively reduce cost.
In one embodiment, as shown in Fig. 2 above-mentioned sampling module 15 includes sampling resistor R2；Division module 13
The other end is connected with the feedback signal sampling end of power supply chip 11 and one end of sampling module 15, including：
The other end of division module 13 is connected with the feedback signal sampling end of power supply chip 11 and sampling resistor R2 one end；
The other end of sampling module 15 is connected and is grounded with the earth terminal of power supply chip 11, including：
The sampling resistor R2 other end is connected and is grounded with the earth terminal of power supply chip 11.
The technical scheme provided by this disclosed embodiment can include the following benefits：Realized by using sampling resistor
The function of sampling module, it can effectively reduce cost.
In one embodiment, load as Wireless Fidelity WIFI chips；The other end of energy-storage module 12 respectively with partial pressure mould
One end, one end of filtration module 14 of block 13 connect with one end of load, including：
The other end of energy-storage module 12 one end with division module 13, one end of filtration module 14 and WIFI chips respectively
One end connects；
The other end ground connection of WIFI chips.
Certainly load can also be other kinds of load, and the disclosure is not any limitation as to the type of load.
In above-mentioned each embodiment, with reference to Fig. 2, LX is the voltage output end of power supply chip 11, and FB is power supply chip 11
Feedback signal sampling end, GND be power supply chip 11 earth terminal；When Vout voltage because load change and moment decline when,
Due to electric capacity of voltage regulation C1 characteristic, the voltage at electric capacity of voltage regulation C1 both ends can not be mutated, therefore the voltage at divider resistance 1R1 both ends is protected
Hold constant, and if the non-parallel voltage-stabilizing electric capacity C1 in divider resistance R1 both ends, then the voltage at divider resistance R1 both ends is to decline；And
VFB=Vout-VR1, therefore, added electric capacity of voltage regulation C1 VFBIt is worth the V than not adding electric capacity of voltage regulation C1FBValue declines fast, therefore, adds
The dynamic responding speed of electric capacity of voltage regulation C1 power supply chip 11 will be faster.Wherein, VR1For the electricity that divider resistance R1 is R1 both ends
Pressure, VFBFor the voltage of the FB pins of power supply chip 11, VoutTo input to the voltage of load.
It is worth noting that, above-mentioned energy-storage module 12, division module 13, filtration module 14, sampling module 15, voltage stabilizing mould
The implementation of block 16 is a kind of citing, and cost can be effectively reduced under this kind of implementation, but in actual applications
The circuit of identical function can be built, the disclosure is not any limitation as to it.
When in DC-DC power source using fixation switching frequency come realize load transient change quick response when, work as use
During relatively low fixed frequency, because when load is underloading, DC-DC frequency of opening the light can be lower, can so reduce switch
Loss, shortcoming is that DC-DC power source can be attempted to adjust dutycycle first after load aggravates suddenly, if debugging dutycycle can not
Enough meet load request and then improve switching frequency, so just after load change, the cycle of power supply adjustment will become
It is long, therefore bigger ripple just occurs in power supply output.Therefore, the disclosure additionally provides another lifting dynamic responding speed
Method, that is, the switching frequency of power supply chip is modulated using higher fixed frequency, so as to can further be lifted
Dynamic responding speed.
Example, any frequency that above-mentioned higher fixed frequency can be between 100KHZ-10MHZ.
Power supply chip in the disclosure can be current any type of power supply chip, and example, can be RT8096A.
The disclosure is implemented also to provide a kind of power supply, includes the circuit of the reduction power-supply ripple described in any embodiment.
Those skilled in the art will readily occur to the disclosure its after considering specification and putting into practice disclosure disclosed herein
Its embodiment.The application is intended to any modification, purposes or the adaptations of the disclosure, these modifications, purposes or
Person's adaptations follow the general principle of the disclosure and including the undocumented common knowledges in the art of the disclosure
Or conventional techniques.Description and embodiments are considered only as exemplary, and the true scope of the disclosure and spirit are by following
Claim is pointed out.
It should be appreciated that the precision architecture that the disclosure is not limited to be described above and is shown in the drawings, and
And various modifications and changes can be being carried out without departing from the scope.The scope of the present disclosure is only limited by appended claim.
Claims (9)
- A kind of 1. circuit for reducing power-supply ripple, it is characterised in that including：The voltage output end of power supply chip and one end of energy-storage module connect；One end of the other end of the energy-storage module one end with division module, one end of filtration module and load respectively is connected；The other end of the division module is connected with the feedback signal sampling end of the power supply chip and one end of sampling module；The other end of the sampling module is connected and is grounded with the earth terminal of the power supply chip；One end of Voltage stabilizing module is connected with one end of the energy-storage module, the other end of the Voltage stabilizing module and the partial pressure mould The other end of block is connected, and the Voltage stabilizing module is used to keep the division module both ends in the change of power consumption of the load Voltage is constant.
- 2. circuit according to claim 1, it is characterised in that the Voltage stabilizing module includes：Electric capacity of voltage regulation；The voltage stabilizing mould One end of block is connected with one end of the energy-storage module, the other end of the Voltage stabilizing module and the other end of the division module It is connected, including：One end of the electric capacity of voltage regulation is connected with one end of the energy-storage module, the other end of the electric capacity of voltage regulation with described point The other end of die block is connected.
- 3. circuit according to claim 2, it is characterised in that the electric capacity of voltage regulation is PF level electric capacity.
- 4. circuit according to claim 1, it is characterised in that the energy-storage module includes：Energy storage inductor；The power supply core The voltage output end of piece and one end of energy-storage module connect, including：The voltage output end of the power supply chip and one end of energy storage inductor connect；One end of one end of the energy-storage module one end with division module, one end of filtration module and load respectively is connected, and is wrapped Include：One end of the other end of the energy storage inductor one end with division module, one end of filtration module and load respectively is connected.
- 5. circuit according to claim 1, it is characterised in that the division module includes：Divider resistance；The energy storage mould One end of the other end of block one end with division module, one end of filtration module and load respectively is connected, including：One end of the other end of the energy-storage module one end with divider resistance, one end of filtration module and load respectively is connected；The other end of the division module is connected with the feedback signal sampling end of the power supply chip and one end of sampling module, bag Include：The other end of the divider resistance is connected with the feedback signal sampling end of the power supply chip and one end of sampling moduleOne end of the Voltage stabilizing module is connected with one end of the energy-storage module, the other end of the Voltage stabilizing module with described point The other end of die block is connected, including：One end of the Voltage stabilizing module is connected with one end of the energy-storage module, the other end of the Voltage stabilizing module with described point The other end of piezoresistance is connected.
- 6. circuit according to claim 1, it is characterised in that the filtration module includes：Filter capacitor；The energy storage mould One end of the other end of block one end with division module, one end of filtration module and load respectively is connected, including：One end of the other end of the energy-storage module one end with division module, one end of filter capacitor and load respectively is connected；The other end ground connection of the filter capacitor.
- 7. circuit according to claim 1, it is characterised in that the sampling module includes sampling resistor；The partial pressure mould The other end of block is connected with the feedback signal sampling end of the power supply chip and one end of sampling module, including：The other end of the division module connects with the feedback signal sampling end of the power supply chip and one end of the sampling resistor Connect；The other end of the sampling module is connected and is grounded with the earth terminal of the power supply chip, including：The other end of the sampling resistor is connected and is grounded with the earth terminal of the power supply chip.
- 8. according to the circuit described in claim any one of 1-7, it is characterised in that the switching frequency of the power supply chip is Any frequency between 100KHZ-10MHZ.
- 9. a kind of power supply, it is characterised in that include the circuit of the reduction power-supply ripple described in the claims any one of 1-8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711107823.4A CN107834828A (en) | 2017-11-10 | 2017-11-10 | Reduce the circuit and power supply of power-supply ripple |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711107823.4A CN107834828A (en) | 2017-11-10 | 2017-11-10 | Reduce the circuit and power supply of power-supply ripple |
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| CN107834828A true CN107834828A (en) | 2018-03-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201711107823.4A Pending CN107834828A (en) | 2017-11-10 | 2017-11-10 | Reduce the circuit and power supply of power-supply ripple |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111245202A (en) * | 2019-12-23 | 2020-06-05 | Tcl华星光电技术有限公司 | Power supply circuit |
| CN114614849A (en) * | 2020-12-08 | 2022-06-10 | 南昌华勤电子科技有限公司 | Voltage regulation circuit, method, chip and equipment |
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| CN203406784U (en) * | 2013-08-23 | 2014-01-22 | 深圳Tcl新技术有限公司 | DC-DC buck circuit and DC-DC power supply |
| CN205490116U (en) * | 2016-01-08 | 2016-08-17 | 南京奥联汽车电子电器股份有限公司 | Switching power supply reduction voltage circuit of high frequency |
| CN206461520U (en) * | 2017-02-07 | 2017-09-01 | 深圳市双翼科技股份有限公司 | A kind of DC D/C powers circuit |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN203406784U (en) * | 2013-08-23 | 2014-01-22 | 深圳Tcl新技术有限公司 | DC-DC buck circuit and DC-DC power supply |
| CN205490116U (en) * | 2016-01-08 | 2016-08-17 | 南京奥联汽车电子电器股份有限公司 | Switching power supply reduction voltage circuit of high frequency |
| CN206461520U (en) * | 2017-02-07 | 2017-09-01 | 深圳市双翼科技股份有限公司 | A kind of DC D/C powers circuit |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111245202A (en) * | 2019-12-23 | 2020-06-05 | Tcl华星光电技术有限公司 | Power supply circuit |
| CN114614849A (en) * | 2020-12-08 | 2022-06-10 | 南昌华勤电子科技有限公司 | Voltage regulation circuit, method, chip and equipment |
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Application publication date: 20180323 |