CN105099179A - System for improving transient response of power supply circuit - Google Patents
System for improving transient response of power supply circuit Download PDFInfo
- Publication number
- CN105099179A CN105099179A CN201410157416.4A CN201410157416A CN105099179A CN 105099179 A CN105099179 A CN 105099179A CN 201410157416 A CN201410157416 A CN 201410157416A CN 105099179 A CN105099179 A CN 105099179A
- Authority
- CN
- China
- Prior art keywords
- signal
- circuit
- output
- power circuit
- control
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 230000001052 transient effect Effects 0.000 title claims abstract description 22
- 238000001514 detection method Methods 0.000 claims description 44
- 238000004146 energy storage Methods 0.000 claims description 13
- 230000000694 effects Effects 0.000 claims description 10
- 230000003321 amplification Effects 0.000 claims description 7
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 7
- 238000005516 engineering process Methods 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 4
- 230000001939 inductive effect Effects 0.000 description 3
- 239000004065 semiconductor Substances 0.000 description 3
- 230000007704 transition Effects 0.000 description 3
- 230000007423 decrease Effects 0.000 description 2
- 238000010295 mobile communication Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000007274 generation of a signal involved in cell-cell signaling Effects 0.000 description 1
- 230000024241 parasitism Effects 0.000 description 1
Landscapes
- Dc-Dc Converters (AREA)
Abstract
The invention relates to the field of electronic technologies, particularly relates to a circuit system, and provides a system for improving transient response of a power supply circuit. The system comprises a switching power supply circuit and a control circuit, and is characterized in that the switching power supply circuit controls to generate corresponding output voltage according to different reference voltage; and the control circuit is provided with a first control signal output end and a second control signal output end; the first control signal output end outputs a first control signal to the switching power supply circuit; the second control signal output end outputs a second control signal to a controlled load; and the switching power supply circuit selects set reference voltage under the action of the first control signal so as to generate corresponding output voltage and provides the output voltage for the controlled load. The system controls the output voltage of the switching power supply circuit to change before the controlled load is changed, thereby enabling the output voltage to also be maintained in a predetermined tolerance range when a transient change occurs in load current, and improving the transient response of the circuit so as to ensure the system stability.
Description
Technical field
The present invention relates to electronic technology field, be specifically related to a kind of Circuits System.
Background technology
In the power system approach of electronics and communication system, Switching Power Supply is responsible for providing output voltage to load, to maintain normal work, realizes systemic-function.A kind of common system configuration of prior art as shown in Figure 1, comprise a controlled load, one Switching Power Supply, one control circuit, controlled load can be mobile phone function chip, system in the course of the work, when needs increase by controlled load works, control circuit directly transmits control signal to controlled load, Switching Power Supply provides output voltage to controlled load, the shortcoming that this control system exists is: when in system, controlled load increases suddenly, switch power source output voltage can be caused to decline rapidly, the steady operation of influential system, systemic-function more can be caused under serious conditions normally to realize, as shown in the voltage-vs-time of Fig. 2 or the oscillogram of current-vs-time, the unexpected increase of controlled load makes output voltage fluctuation larger, circuit transient response is poor, be unfavorable for the steady operation of system.
Summary of the invention
The object of the invention is to, a kind of system improving power circuit transient response is provided, solves above technical problem;
Technical problem solved by the invention can realize by the following technical solutions:
Improve a system for power circuit transient response, wherein, comprise,
One switching power circuit, controls to produce corresponding output voltage according to different reference voltages;
One control circuit, described control circuit is provided with:
One first control signal output, described first control signal output exports first and controls signal to described switching power circuit;
One second control signal output, described second control signal output exports second and controls signal to a controlled load;
Described switching power circuit selects the reference voltage set to be supplied to described controlled load to produce corresponding output voltage under the effect of described first control signal.
Preferably, described switching power circuit comprises,
One selector switch, connects at least two reference voltages, and output described reference voltage selected by described selector switch under the effect of described first control signal.
Preferably, before described second control signal output output described second controls signal to described controlled load, described first control signal output exports first and controls signal to described switching power circuit.
Preferably, described switching power circuit also comprises,
One input;
One output;
One earth terminal;
One crosses node;
One operating circuit being provided with energy-storage travelling wave tube;
One control unit, in order to select the described reference voltage of output and a voltage feedback signal and a current detection signal to generate pulse-width signal according to described selector switch;
One switching device group, be arranged at described input, described output, described on the circuit that crosses between node and described earth terminal, under described pulse-width signal effect, control described operating circuit alternately switch between charge mode and discharge mode.
Preferably, described control unit comprises,
One error amplifier, for selecting the described reference voltage of output and described voltage feedback signal to compare to described selector switch, obtains an error amplification signal;
One comparator, for comparing described error amplification signal and described current detection signal, produces a comparison signal;
One clock signal generator; Described clock signal generator is for generation of clock signal;
One PWM controller, described PWM controller connects described clock signal, for producing described pulse-width signal according to described comparison signal and described clock signal.
Preferably, described switching power circuit also comprises,
One feedback network, is connected between described output and described earth terminal, in order to produce described voltage feedback signal;
One current detection circuit, is controllablely parallel to described input and describedly crosses between node, in order to produce described current detection signal according to described pulse-width signal.
Preferably, described operating circuit comprises,
Charging controlling brancher, is connected to described input and describedly crosses between node;
Discharge and recharge branch road, crosses between node and described output described in being connected to;
Control of discharge branch road, crosses between node and described earth terminal described in being connected to;
Described energy-storage travelling wave tube is series on described discharge and recharge branch road;
Described operating circuit is when charge mode, and described switching device group controls described charging controlling brancher and the conducting of described discharge and recharge branch road, and controls the disconnection of described control of discharge branch road, and the electric current that described input is inputted charges to described energy-storage travelling wave tube;
Described operating circuit is when discharge mode, and described switching device group controls described control of discharge branch road and the conducting of described discharge and recharge branch road, and controls the disconnection of described charging controlling brancher, and described energy-storage travelling wave tube is discharged to described output.
Preferably, described control unit also comprises a zero cross detection circuit, and the output of described zero cross detection circuit is connected with described PWM controller.
Preferably, described feedback network is formed primarily of a resistor voltage divider circuit, described resistor voltage divider circuit comprises predetermined number and is connected in series with each other the divider resistance between described output and described earth terminal, and the point be connected between described divider resistance forms divider node;
Described feedback voltage signal is drawn from predetermined divider node place.
Preferably, described current detection circuit comprises:
One detects resistance, is series on described current detection circuit;
One detecting unit, connects the two ends of described detection resistance, in order to detect the electric current flowing through described detection resistance;
One controls the detection control switch of break-make by described pulse-width signal, is connected on described current detection circuit.
Beneficial effect: owing to adopting above technical scheme, the present invention is before change controlled load, and control switch power circuit output voltage changes, make when load current generation transition, output voltage also can maintain in predetermined range of tolerable variance, improves the transient response of circuit, to guarantee system stability.
Accompanying drawing explanation
Fig. 1 is the system architecture schematic diagram of prior art;
Fig. 2 is the oscillogram of main signal in prior art;
Fig. 3 is system architecture schematic diagram of the present invention;
Fig. 4 is switching power circuit schematic diagram of the present invention;
Fig. 5 is the oscillogram of main signal of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, the every other embodiment that those of ordinary skill in the art obtain under the prerequisite of not making creative work, all belongs to the scope of protection of the invention.
It should be noted that, when not conflicting, the embodiment in the present invention and the feature in embodiment can combine mutually.
Below in conjunction with the drawings and specific embodiments, the invention will be further described, but not as limiting to the invention.
With reference to Fig. 3, a kind of system improving power circuit transient response, wherein, comprises,
One switching power circuit 1, controls to produce corresponding output voltage Vdcdcout according to different reference voltages;
One control circuit 2, control circuit 2 is provided with:
One first control signal output, the first control signal output exports the first control signal s1 to switching power circuit 1;
One second control signal output, the second control signal output exports the second control signal s2 to controlled load 3;
Switching power circuit 1 selects the reference voltage set to be supplied to controlled load 3 to produce corresponding output voltage Vdcdcout under the effect of the first control signal s1.
The present invention can before system needs increase or reduces controlled load 3, the reference voltage of setting selected by control switch power circuit 1, change to make output voltage Vdcdcout, the present invention can when load current generation transition, output voltage Vdcdcout also can maintain in predetermined range of tolerable variance, improve the transient response of circuit, to guarantee system stability.
As a kind of preferred embodiment of the present invention, switching power circuit 1 can comprise,
One selector switch 11, connects at least two reference voltages, and selector switch 11 is selection reference voltage under the effect of the first control signal;
With reference to Fig. 4, a kind of specific embodiment, the present invention can comprise two reference voltages, be respectively Vref1 and Vref2, the magnitude of voltage of one of them reference voltage is greater than the magnitude of voltage of another reference voltage, if Vref1 is 0.6V, Vref2 is 0.62V or 0.7V, when controlled load needs to increase, by the reference voltage that the first control signal control switch power circuit 1 Selection radio current base voltage is larger, make between controlled load access, output voltage lifting, object is when load current generation transition, output voltage Vdcdcout also can maintain in predetermined range of tolerable variance, improve the transient response of circuit.Can be found out by the oscillogram shown in comparison diagram 5 and the oscillogram shown in Fig. 2, when adopting control system of the present invention that load can be made to increase, switch power source output voltage fluctuation is less, is conducive to the steady operation of system.
As a kind of preferred embodiment of the present invention, before second control signal output exports the second control signal s2 to controlled load 3, first control signal output exports the first control signal s1 to switching power circuit 1, namely the second control signal s2 compares the delay that the first control signal s1 has a setting-up time, before ensureing controlled load 3 connecting system, the corresponding change of output voltage Vdcdcout.
As a kind of preferred embodiment of the present invention, selector switch 11 has multiple signal input part and a signal output part, under the effect of the first control signal s1, selector switch 11 selects the reference voltage of a setting to export, and the variation tendency according to load selects suitable reference voltage.
As a kind of preferred embodiment of the present invention, switching power circuit 1 also comprises,
One input VDD;
One output end vo ut;
One earth terminal GND;
One crosses node SW;
One operating circuit being provided with energy-storage travelling wave tube L;
One control unit, in order to select the reference voltage of output and a voltage feedback signal and a current detection signal to generate pulse-width signal according to selector switch 11.
One switching device group, on the circuit be arranged at input VDD, output end vo ut, crossing between node SW and earth terminal GND, controls operating circuit and alternately switches between charge mode and discharge mode under pulse-width signal effect.
As a kind of preferred embodiment of the present invention, control unit comprises,
One error amplifier 12, for selecting the reference voltage that provides and voltage feedback signal Vfb to compare to selector switch 11, obtains an error amplification signal;
One comparator 13, for comparing error amplification signal and current detection signal, produces a comparison signal;
One clock signal generator 14; Clock signal generator 14 is for generation of clock signal;
One PWM controller 15, PWM controller 15 connects clock signal, for producing pulse-width signal according to comparison signal and clock signal.
As a kind of preferred embodiment of the present invention, switching power circuit 1 also comprises,
One feedback network 16, is connected between output end vo ut and earth terminal GND, in order to produce voltage feedback signal Vfb;
One current detection circuit 18, is controllablely parallel to input VDD and crosses between node SW, in order to according to pulse-width signal generation current detection signal.
A kind of specific embodiment, the in-phase input end (+) of error amplifier 12 accepts the reference voltage of selector switch 11 output, inverting input (-) the input voltage feedback signal Vfb of error amplifier 12; The in-phase input end (+) of comparator 13 connects error amplification signal; the inverting input (-) of comparator 13 connects current detection signal; current detection signal is obtained by current detection circuit 18; the object of current detection signal is that the electric current of convection current overpower switching tube detects timely and effectively, to carry out switch control rule and overcurrent protection.
Current detection circuit 18 can be accomplished in several ways, and as a kind of preferred embodiment of the present invention, current detection circuit 18 can comprise:
One detects resistance Rb, is series on current detection circuit 18;
One detecting unit or current detecting and compensating unit 19, connect the two ends detecting resistance Rb, in order to detect the electric current flowing through and detect resistance Rb;
One controls the detection control switch Msen of break-make by pulse-width signal, is connected on current detection circuit 18.
Current detecting and compensating unit 19 are also connected with clock signal generator 14, for receive clock signal generator 14 produce ramp signal carry out slope compensation after, the object of slope compensation is stable detection electric current, is connected to the inverting input (-) of comparator 13 after current detection signal slope compensation.
As a kind of preferred embodiment of the present invention, operating circuit comprises,
Charging controlling brancher, is connected to input VDD and crosses between node SW;
Discharge and recharge branch road, is connected to and crosses between node SW and output end vo ut;
Control of discharge branch road, is connected to and crosses between node SW and earth terminal GND;
Energy-storage travelling wave tube L is series on discharge and recharge branch road;
Operating circuit is when charge mode, and switching device group controls charging controlling brancher and the conducting of discharge and recharge branch road, and controlled discharge controlling brancher disconnects, and the electric current that input VDD is inputted charges to energy-storage travelling wave tube L;
Operating circuit is when discharge mode, and switching device group controlled discharge controlling brancher and the conducting of discharge and recharge branch road, and the disconnection of control charging controlling brancher, make energy-storage travelling wave tube L discharge to output end vo ut.
A filter capacitor C is also connected between output end vo ut with earth terminal GND.Energy-storage travelling wave tube L of the present invention adopts an inductance.
As a kind of preferred embodiment of the present invention, feedback network 16 is formed primarily of a resistor voltage divider circuit, resistor voltage divider circuit comprises predetermined number and is connected in series with each other the divider resistance between output end vo ut and earth terminal GND, and the point be connected between divider resistance forms divider node;
Feedback voltage signal Vfb draws from predetermined divider node place.As a kind of specific embodiment, feedback network 16 comprises the first resistance R1 and the second resistance R2, and the first resistance R1 and the second resistance R2 connects, and the point that feedback voltage signal Vfb is connected with the second resistance R2 from the first resistance R1 is drawn.
A kind of specific embodiment, switching device group of the present invention comprises the first switching tube Mp and second switch pipe Mn, first switching tube Mp is series on charging controlling brancher, second switch pipe Mn is series on control of discharge branch road, preferably, first switching tube Mp adopts P to link up metal-oxide-semiconductor, its source electrode connects input VDD, drain electrode connection crosses node SW, second switch pipe Mn adopts N to link up metal-oxide-semiconductor, its source electrode connects earth terminal VDD, drain electrode connection crosses node SW, the grid of the first switching tube Mp and second switch pipe Mn accepts control realization conducting or the cut-off of pulse-width signal.
A kind of specific embodiment, detection control switch Msen can adopt P to link up metal-oxide-semiconductor, and its source electrode connects input VDD by detecting resistance Rb, and drain electrode connection crosses node SW.
As a kind of preferred embodiment of the present invention, control unit also comprises a zero cross detection circuit 17, and the output of zero cross detection circuit 17 is connected with PWM controller 15.In switching power circuit, when load is larger, inductive current can not get back to zero within the whole cycle, circuit is made usually to be in continuous conduction mode, but when load current continuous decrease and low to a certain critical value time, first switching tube Mp and second switch pipe Mn may close in one-period simultaneously, now the mode of operation of inductive current is called DCM, electric current during this period on inductance is zero, time under discontinuous inductive current pattern, due to the logical delay of converter inside, the impact of the factors such as wire delay and parasitism, when causing load current to continue to drop to critical value, second switch pipe Mn does not turn off or does not turn off completely, electric current now can be caused to pour in down a chimney, make output voltage that fluctuation greatly occur, the performance index of influential system, pour in down a chimney for preventing electric current by arranging zero cross detection circuit 17, avoid the problems referred to above, the zero cross detection circuit of prior art can be adopted realize.
The present invention may be used for mobile communication system, particularly the power management of mobile communication terminal.
The foregoing is only preferred embodiment of the present invention; not thereby embodiments of the present invention and protection range is limited; to those skilled in the art; should recognize and all should be included in the scheme that equivalent replacement done by all utilizations specification of the present invention and diagramatic content and apparent change obtain in protection scope of the present invention.
Claims (10)
1. improve a system for power circuit transient response, it is characterized in that, comprise,
One switching power circuit, controls to produce corresponding output voltage according to different reference voltages;
One control circuit, described control circuit is provided with:
One first control signal output, described first control signal output exports first and controls signal to described switching power circuit;
One second control signal output, described second control signal output exports second and controls signal to a controlled load;
Described switching power circuit selects the reference voltage set to be supplied to described controlled load to produce corresponding output voltage under the effect of described first control signal.
2. a kind of system improving power circuit transient response according to claim 1, it is characterized in that, described switching power circuit comprises,
One selector switch, connects at least two reference voltages, and output described reference voltage selected by described selector switch under the effect of described first control signal.
3. a kind of system improving power circuit transient response according to claim 1, it is characterized in that, before described second control signal output output described second controls signal to described controlled load, described first control signal output exports first and controls signal to described switching power circuit.
4. a kind of system improving power circuit transient response according to claim 2, it is characterized in that, described switching power circuit also comprises,
One input;
One output;
One earth terminal;
One crosses node;
One operating circuit being provided with energy-storage travelling wave tube;
One control unit, in order to select the described reference voltage of output and a voltage feedback signal and a current detection signal to generate pulse-width signal according to described selector switch;
One switching device group, be arranged at described input, described output, described on the circuit that crosses between node and described earth terminal, under described pulse-width signal effect, control described operating circuit alternately switch between charge mode and discharge mode.
5. a kind of system improving power circuit transient response according to claim 4, it is characterized in that, described control unit comprises,
One error amplifier, for selecting the described reference voltage of output and described voltage feedback signal to compare to described selector switch, obtains an error amplification signal;
One comparator, for comparing described error amplification signal and described current detection signal, produces a comparison signal;
One clock signal generator; Described clock signal generator is for generation of clock signal;
One PWM controller, described PWM controller connects described clock signal, for producing described pulse-width signal according to described comparison signal and described clock signal.
6. a kind of system improving power circuit transient response according to claim 4, it is characterized in that, described switching power circuit also comprises,
One feedback network, is connected between described output and described earth terminal, in order to produce described voltage feedback signal;
One current detection circuit, is controllablely parallel to described input and describedly crosses between node, in order to produce described current detection signal according to described pulse-width signal.
7. a kind of system improving power circuit transient response according to claim 4, it is characterized in that, described operating circuit comprises,
Charging controlling brancher, is connected to described input and describedly crosses between node;
Discharge and recharge branch road, crosses between node and described output described in being connected to;
Control of discharge branch road, crosses between node and described earth terminal described in being connected to;
Described energy-storage travelling wave tube is series on described discharge and recharge branch road;
Described operating circuit is when charge mode, and described switching device group controls described charging controlling brancher and the conducting of described discharge and recharge branch road, and controls the disconnection of described control of discharge branch road, and the electric current that described input is inputted charges to described energy-storage travelling wave tube;
Described operating circuit is when discharge mode, and described switching device group controls described control of discharge branch road and the conducting of described discharge and recharge branch road, and controls the disconnection of described charging controlling brancher, and described energy-storage travelling wave tube is discharged to described output.
8. a kind of system improving power circuit transient response according to claim 5, it is characterized in that, described control unit also comprises a zero cross detection circuit, and the output of described zero cross detection circuit is connected with described PWM controller.
9. a kind of system improving power circuit transient response according to claim 6, it is characterized in that, described feedback network is formed primarily of a resistor voltage divider circuit, described resistor voltage divider circuit comprises predetermined number and is connected in series with each other the divider resistance between described output and described earth terminal, and the point be connected between described divider resistance forms divider node;
Described feedback voltage signal is drawn from predetermined divider node place.
10. a kind of system improving power circuit transient response according to claim 6, it is characterized in that, described current detection circuit comprises:
One detects resistance, is series on described current detection circuit;
One detecting unit, connects the two ends of described detection resistance, in order to detect the electric current flowing through described detection resistance;
One controls the detection control switch of break-make by described pulse-width signal, is connected on described current detection circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410157416.4A CN105099179A (en) | 2014-04-17 | 2014-04-17 | System for improving transient response of power supply circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410157416.4A CN105099179A (en) | 2014-04-17 | 2014-04-17 | System for improving transient response of power supply circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105099179A true CN105099179A (en) | 2015-11-25 |
Family
ID=54578965
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410157416.4A Pending CN105099179A (en) | 2014-04-17 | 2014-04-17 | System for improving transient response of power supply circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105099179A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105514949A (en) * | 2016-01-28 | 2016-04-20 | 中国科学院空间应用工程与技术中心 | Solid state power controller with latent flux prevention function and control method |
| CN105939105A (en) * | 2016-05-20 | 2016-09-14 | 深圳市华星光电技术有限公司 | Step-down circuit and electronic equipment |
| CN108088589A (en) * | 2016-11-23 | 2018-05-29 | 大陆汽车电子(长春)有限公司 | For detecting the device and method of the validity of thermistor |
| CN111900783A (en) * | 2019-05-05 | 2020-11-06 | 宏碁股份有限公司 | Overpower protection circuit, charger and overpower protection method |
| CN112018839A (en) * | 2020-07-29 | 2020-12-01 | 上海芯导电子科技股份有限公司 | Load detection circuit |
| CN113252974A (en) * | 2021-07-01 | 2021-08-13 | 钰泰半导体南通有限公司 | Load current detection circuit |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1922779A (en) * | 2004-11-26 | 2007-02-28 | 株式会社理光 | Switching regulator and method for switching output voltage thereof |
| CN101207329A (en) * | 2006-12-21 | 2008-06-25 | 夏普株式会社 | Chopper regulator circuit |
| CN101335488A (en) * | 2007-06-29 | 2008-12-31 | 天钰信息科技（上海）有限公司 | System for modulating working frequency of switch power source converter |
| CN101488704A (en) * | 2009-02-26 | 2009-07-22 | 威盛电子股份有限公司 | Control circuit and driving system |
| CN101753022A (en) * | 2008-12-10 | 2010-06-23 | 成都芯源系统有限公司 | Load transient change detection circuit for voltage converter and application circuit thereof |
| US20100289471A1 (en) * | 2009-05-18 | 2010-11-18 | Fujitsu Semicondctor Limited | Power control device, power supply device, and power control method |
| CN101903844A (en) * | 2007-12-20 | 2010-12-01 | 高通股份有限公司 | Reducing cross-regulation interferences between voltage regulators |
| CN102801315A (en) * | 2011-05-23 | 2012-11-28 | 万国半导体股份有限公司 | Constant on-time switching regulator implementing light load control |
| CN102868298A (en) * | 2012-09-12 | 2013-01-09 | 电子科技大学 | Timer for switch adjuster with COT (Constant On-Time) control mode |
| CN103105882A (en) * | 2011-11-11 | 2013-05-15 | 瑞萨电子株式会社 | Semiconductor integrated circuit |
-
2014
- 2014-04-17 CN CN201410157416.4A patent/CN105099179A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1922779A (en) * | 2004-11-26 | 2007-02-28 | 株式会社理光 | Switching regulator and method for switching output voltage thereof |
| CN101207329A (en) * | 2006-12-21 | 2008-06-25 | 夏普株式会社 | Chopper regulator circuit |
| CN101335488A (en) * | 2007-06-29 | 2008-12-31 | 天钰信息科技（上海）有限公司 | System for modulating working frequency of switch power source converter |
| CN101903844A (en) * | 2007-12-20 | 2010-12-01 | 高通股份有限公司 | Reducing cross-regulation interferences between voltage regulators |
| CN101753022A (en) * | 2008-12-10 | 2010-06-23 | 成都芯源系统有限公司 | Load transient change detection circuit for voltage converter and application circuit thereof |
| CN101488704A (en) * | 2009-02-26 | 2009-07-22 | 威盛电子股份有限公司 | Control circuit and driving system |
| US20100289471A1 (en) * | 2009-05-18 | 2010-11-18 | Fujitsu Semicondctor Limited | Power control device, power supply device, and power control method |
| CN102801315A (en) * | 2011-05-23 | 2012-11-28 | 万国半导体股份有限公司 | Constant on-time switching regulator implementing light load control |
| CN103105882A (en) * | 2011-11-11 | 2013-05-15 | 瑞萨电子株式会社 | Semiconductor integrated circuit |
| CN102868298A (en) * | 2012-09-12 | 2013-01-09 | 电子科技大学 | Timer for switch adjuster with COT (Constant On-Time) control mode |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105514949A (en) * | 2016-01-28 | 2016-04-20 | 中国科学院空间应用工程与技术中心 | Solid state power controller with latent flux prevention function and control method |
| CN105939105A (en) * | 2016-05-20 | 2016-09-14 | 深圳市华星光电技术有限公司 | Step-down circuit and electronic equipment |
| CN108088589A (en) * | 2016-11-23 | 2018-05-29 | 大陆汽车电子(长春)有限公司 | For detecting the device and method of the validity of thermistor |
| CN111900783A (en) * | 2019-05-05 | 2020-11-06 | 宏碁股份有限公司 | Overpower protection circuit, charger and overpower protection method |
| CN111900783B (en) * | 2019-05-05 | 2022-05-03 | 宏碁股份有限公司 | Over-power protection circuit, charger and over-power protection method |
| CN112018839A (en) * | 2020-07-29 | 2020-12-01 | 上海芯导电子科技股份有限公司 | Load detection circuit |
| CN113252974A (en) * | 2021-07-01 | 2021-08-13 | 钰泰半导体南通有限公司 | Load current detection circuit |
| CN113252974B (en) * | 2021-07-01 | 2021-11-05 | 钰泰半导体股份有限公司 | Load current detection circuit |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105099179A (en) | System for improving transient response of power supply circuit | |
| CN102480222B (en) | Hysteretic power converter with calibration circuit | |
| JP6434913B2 (en) | Power supply and power supply voltage adjustment method | |
| CN102195479B (en) | Controller for, and method of controlling, a switched mode power converter | |
| CN105159372B (en) | Negative voltage generation circuit | |
| CN103475216A (en) | Power converter, clock module, control circuit and related control method | |
| EP3644488A1 (en) | Multi-phase power supply for stepdown system | |
| KR20160125945A (en) | Single-inductor positive and negative voltage output device | |
| CN103248227B (en) | Switching Power Supply and realize the switch power controller of constant output current | |
| CN102859461A (en) | Digital control method for improving heavy-to-light (buck) load transient response of a switched mode power supply | |
| CN203445787U (en) | Power Converter, Clock Module, and Control Circuit | |
| CN105162325A (en) | Pulse frequency modulation circuit based on reference voltage comparison oscillator | |
| CN103036426A (en) | Peak current gradient synchronous booster circuit | |
| CN103259408B (en) | Switching Power Supply and realize the switch power controller of constant output current | |
| CN104638722A (en) | Battery charging system based on digital control and control circuit thereof | |
| CN103036427A (en) | Synchronous buck converter | |
| CN103036429A (en) | Synchronous boost converter | |
| CN104319998A (en) | Switching power source control circuit, switching power source and control method | |
| CN103066823A (en) | Controller and control method of switch power source | |
| CN103095129A (en) | Switch frequency hopping synchronous voltage reduction circuit | |
| CN105281568A (en) | Voltage-reducing circuit | |
| CN103944385B (en) | The pilot circuit of a kind of super low speed paper tape reader static power disspation, control method and switch type regulator | |
| CN103051217A (en) | Flyback converter with gradually changing peak current | |
| CN105811761A (en) | Current sampling circuit and boost circuit integrated with current sampling circuit | |
| CN106300964B (en) | Independent charge and discharge sequential single-inductance double-output switch converters method for controlling frequency conversion and its device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20151125 |