CN104682679A - Power converter, slope detection controller and method of slope detection controller - Google Patents
Power converter, slope detection controller and method of slope detection controller Download PDFInfo
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- CN104682679A CN104682679A CN201310612968.5A CN201310612968A CN104682679A CN 104682679 A CN104682679 A CN 104682679A CN 201310612968 A CN201310612968 A CN 201310612968A CN 104682679 A CN104682679 A CN 104682679A
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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
- H02M1/32—Means for protecting converters other than automatic disconnection
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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
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
- H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
- H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
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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
- H02M1/0003—Details of control, feedback or regulation circuits
- H02M1/0038—Circuits or arrangements for suppressing, e.g. by masking incorrect turn-on or turn-off signals, e.g. due to current spikes in current mode control
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Dc-Dc Converters (AREA)
Abstract
The invention discloses a power converter, a slope detection controller and a method of the slope detection controller. The power converter comprises an output stage, a pulse-width modulation control unit and the slope detection controller, wherein the output stage comprises a first change-over switch; the pulse-width modulation control unit is coupled with the output stage, and controls the operation of the first change-over switch of the output stage; the slope detection controller is coupled with the pulse-width modulation control unit, generates a slope detection signal according to the output voltage of the power converter and also generates a control signal according to the slope detection signal, so that the pulse-width modulation control unit can control the on-off of the first change-over switch.
Description
Technical field
The invention relates to a kind of power supply changeover device, and relate to a kind of power supply changeover device and slope detecting controller and method thereof especially.
Background technology
Fig. 1 is the circuit diagram of known DC-DC converter.As shown in Figure 1, DC-DC converter 100 is in order to be converted to output voltage Vout by input voltage vin via output stage 110.DC-DC converter 100 is feedback to pulse wave width modulation control unit 120 according to the change of output voltage Vout again, to control the operation of output stage 110, makes output voltage Vout can be adjusted in a rated output voltage.
Fig. 2 is the known DC-DC converter waveform schematic diagram in load variations moment.Please with reference to Fig. 1 and Fig. 2, under normal operation, the T1 as Fig. 2 is interval, and its output voltage Vout can maintain in a preset range of rated output voltage by DC-DC converter 100 for DC-DC converter 100.When load converts the moment of underloading to by heavy duty, because the circuit cycles reaction speed in DC-DC converter 100 cannot catch up with load transfer transition (load transient), therefore interval at the T2 of Fig. 2, the load current Iload of the inductive current IL that DC-DC converter 100 provides still than required is many, so above-mentioned unnecessary inductive current IL will charge to output capacitance Cout, make output voltage Vout raise and cause output voltage Vout to exceed the preset range of rated output voltage, this phenomenon is referred to as overshoot (overshoot).But, said circumstances on products application be reluctant to see.
Summary of the invention
In view of this, the invention provides a kind of power supply changeover device and slope detecting controller and method power supply changeover device, the whereby problem of solution mentioned by background technology.
The present invention proposes a kind of slope detecting controller of power supply changeover device, and it comprises slope detecting unit and output control unit.Above-mentioned slope detecting unit receives the output voltage of power supply changeover device, and produces slope detection signal according to output voltage.Above-mentioned output control unit couples slope detecting unit, and provides control signal according to slope detection signal, to control power supply changeover device.
In one embodiment of this invention, when slope detection signal exceedes preset value, output control unit produces control signal.
In one embodiment of this invention, control signal is in order to the first diverter switch of powered-down transducer.
In one embodiment of this invention, control signal is in order to end the ON time signal of the time signal generator of power supply changeover device.
In one embodiment of this invention, control signal is in order to end the pulse wave width modulation signal of power supply changeover device.
The present invention proposes a kind of power supply changeover device, and it comprises output stage, pulse wave width modulation control unit and slope detecting controller.Above-mentioned output stage comprises the first diverter switch.Above-mentioned pulse wave width modulation control unit couples output stage, and controls the operation of the first diverter switch of output stage.Above-mentioned slope detecting controller couples pulse wave width modulation control unit, and produce slope detection signal according to the output voltage of power supply changeover device, to produce control signal according to slope detection signal, control the first diverter switch to make pulse wave width modulation control unit and close.
In one embodiment of this invention, output stage also comprises the second diverter switch, and the first diverter switch can be referred to as switch on the bridge again, and the second diverter switch can be referred to as bridge switch again.
In one embodiment of this invention, pulse wave width modulation control unit comprises driver, and slope detecting controller coupling drivers, makes control signal control and drive system close the first diverter switch.
In one embodiment of this invention, pulse wave width modulation control unit comprises time signal generator, slope detecting controller couples time signal generator, makes control signal control time signal generator stop providing ON time signal, to close the first diverter switch.
In one embodiment of this invention, pulse wave width modulation control unit comprises pulse wave width modulation generator, slope detecting controller couples pulse wave width modulation generator, make control signal control pulse wave width modulation generator to stop providing pulse wave width modulation signal, to close the first diverter switch.
In one embodiment of this invention, pulse wave width modulation generator comprises error amplifier and the first comparator, slope detecting controller is coupled between error amplifier and the first comparator, stops providing pulse wave width modulation signal to the error signal affecting error amplifier to utilize control signal to make pulse wave width modulation generator.
In one embodiment of this invention, pulse wave width modulation generator comprises error amplifier, the first comparator and ramp signal generator, the first input end of the first comparator couples error amplifier, second input of the first comparator couples ramp signal generator, slope detecting controller couples ramp signal generator, stops providing pulse wave width modulation signal to the ramp signal affecting ramp signal generator to utilize control signal to make pulse wave width modulation generator.
In one embodiment of this invention, slope detecting controller comprises slope detecting unit and output control unit, and slope detecting unit is differential circuit, and to provide slope detection signal, output control unit produces control signal according to slope detection signal.
The present invention proposes a kind of slope detecting control method of power supply changeover device, and it comprises: the output voltage receiving power supply changeover device; Slope detection signal is provided according to output voltage; And produce control signal, to control power supply changeover device according to slope detection signal.
Foregoing slope detecting control method, wherein when above-mentioned slope detection signal is more than a preset value, produces above-mentioned control signal.
In sum, the detecting control method that power supply changeover device provided by the present invention and slope detect controller utilizes to be detected output voltage slope and opens the control method in loop to suppress output voltage overshoot phenomenon, to improve the stability of a system.
Can be further understood by the following detailed description and accompanying drawings about the advantages and spirit of the present invention.
Accompanying drawing explanation
Fig. 1 illustrates the circuit diagram of known DC-DC converter.
Fig. 2 illustrates the waveform schematic diagram of known DC-DC converter in load variations moment.
Fig. 3 diagram is according to the circuit diagram of the power supply changeover device of one embodiment of the invention.
Fig. 4 diagram is according to the circuit diagram of the slope detecting controller of one embodiment of the invention.
Fig. 5 illustrates and shows the load after adding slope detecting controller is converted to underloading instant response by heavy duty.
Fig. 6 A illustrates the circuit diagram of the first embodiment of the control mode according to slope detecting controller of the present invention.
Fig. 6 B illustrates the drive circuit schematic diagram of the first embodiment of the control mode according to slope detecting controller of the present invention.
Fig. 7 A illustrates the circuit diagram of the second embodiment of the control mode according to slope detecting controller of the present invention.
Fig. 7 B illustrates the time signal generator circuit diagram of the second embodiment of the control mode according to slope detecting controller of the present invention.
Fig. 8 A illustrates the circuit diagram of the 3rd embodiment of the control mode according to slope detecting controller of the present invention.
Fig. 8 B illustrates the departure signal circuit schematic diagram of the 3rd embodiment of the control mode according to slope detecting controller of the present invention.
Fig. 8 C illustrates the control ramp signal circuit diagram of the 3rd embodiment of the control mode according to slope detecting controller of the present invention.
Fig. 9 diagram is according to the slope detecting control method of the power supply changeover device of one embodiment of the invention.
Main element symbol description:
100,300 power supply changeover devices
110,31 output stages
120,32 pulse wave width modulation control units
33 slope detecting controllers
121,321 error amplifiers
122,322 first comparators
123,323 time signal generators
124,324 drivers
325 pulse wave width modulation generators
326 ramp signal generators
329 compensating units
41 slope detecting units
42 output control units
Cout output capacitance
Ctrl control signal
ERR error signal
ESR equivalent series resistance
IL inductive current
Iload load current
Vin input voltage
Vout output voltage
V+ positive voltage
UG first diverter switch signal
LG second diverter switch signal
PHASE phase node
Pwm pulse wave width modulation signal
REF reference signal
Ramp ramp signal
SD slope detection signal
STL preset value
TON ON time signal
SW1 first diverter switch
C electric capacity
Non-and the lock of nand
S905 ~ S920 process step
SW2 second diverter switch
R resistance
Inv inverter
DFF D class trigger
Embodiment
Now with detailed reference to one exemplary embodiment of the present invention, and the example of described one exemplary embodiment is described in the accompanying drawings.In addition, in graphic and execution mode use element/component that is identical or like numerals will to be used to represent identical or similar portions.
In following all embodiments, when element is regarded as " connection " or " coupling " to another element, it can be and directly connects or be coupled to another element, maybe may there is intervenient element.Term " circuit " can be expressed as at least one element or multiple element, or on one's own initiative and/or passively and the element be coupled in together to provide proper function.Term " signal " can be expressed as at least one electric current, voltage, load, temperature, data or other signals.Ramp signal can be again class ramp signal, triangular signal or sawtooth signal, and it can be the oblique wave of repetition-decline form or the oblique wave of repetition-rising form, determines according to application.
A preferred embodiment according to the present invention is a kind of power supply changeover device.In this embodiment, the power supply changeover device that the present invention proposes is applied in power supply integrated circuit (Power IC), but not as limit.
Please refer to Fig. 3, Fig. 3 diagram is according to the circuit diagram of the power supply changeover device of one embodiment of the invention.As shown in Figure 3, power supply changeover device 300 comprises output stage 31, pulse wave width modulation control unit 32 and slope detecting controller 33.In the present embodiment, pulse wave width modulation control unit 32 also comprises error amplifier 321, first comparator 322, time signal generator 323 and driver 324; Output stage 31 also comprises the first diverter switch SW1 and the second diverter switch SW2; First diverter switch SW1 also can be described as switch on the bridge, and the second diverter switch SW2 also can be described as bridge switch.In other embodiments, output stage 31 also only can comprise a diverter switch, and the element such as diode or inductance of arranging in pairs or groups, not as limit.
The first diverter switch SW1 in output stage 31 couples input voltage vin and driver 324.The second diverter switch SW2 coupling drivers 324 and earth terminal in output stage 31.Between the first diverter switch SW1 and the second diverter switch SW2, also there is a phase node PHASE, this phase node PHASE couples one end of outputting inductance.In the present embodiment, phase node PHASE also coupling drivers 324.In other embodiments, phase node PHASE also can not coupling drivers 324, not as limit.
The error amplifier 321 of pulse wave width modulation control unit 32 couples the other end of outputting inductance.In other embodiments, error amplifier 321 is also coupled to the other end of outputting inductance by a partial pressure unit.In addition, error amplifier 321 also couples a reference voltage REF, and the large I of this reference voltage REF is relevant to the rated output voltage of power supply changeover device 300.In the present embodiment, error amplifier 321 provides the error signal ERR of voltage type, and in other embodiments, error amplifier 321 also can be replaced, to provide the error signal ERR of current type, not as limit by transduction amplifier (GM).
One input of the first comparator 322 couples the output of error amplifier 321, and in the present embodiment, the output of error amplifier 321 also can just be provided to the first comparator 322 after the compensation deals of compensating unit 329.Another input of first comparator 322 is in order to receive ramp signal ramp.First comparator 322 provides a triggering signal according to comparative result.Time signal generator 323 couples the first comparator 322 and driver 324 respectively.Time signal generator 323 provides ON time signal TON to driver 324 according to above-mentioned triggering signal, controls the operation of output stage 31 thus.By coupling of said elements/circuit, pulse wave width modulation control unit 32 can couple output stage 31, and controls the operation of output stage 31.
In one embodiment of this invention, slope detecting controller 33 couples pulse wave width modulation control unit 32, and control pulse wave width modulation control unit 32 according to the slope of the output voltage Vout of power supply changeover device 300, to control the operation of at least one switch of output stage 31 further.
Fig. 4 is the circuit diagram of the slope detecting controller according to one embodiment of the invention.Relevant its illustrates, respects please with reference to Fig. 3 and Fig. 4.Slope detecting controller 33 comprises slope detecting unit 41 and output control unit 42.Slope detecting unit 41 couples output and the output control unit 42 of power supply changeover device 300 respectively, to receive the output voltage Vout of power supply changeover device 300, and produces slope detection signal SD according to the slope of output voltage Vout.In the present embodiment, slope detecting unit 41 is differential circuits.In other embodiments, slope detecting unit 41 also can utilize other circuit can detecting slope to replace, not as limit.
Output control unit 42 is a comparator, one input end receives slope detection signal SD, its another input receives the reference signal with preset value (slope trigger level), when slope detection signal exceedes this preset value, namely output control unit 42 can produce control signal ctrl to control power supply changeover device 300.
As shown in Figure 5, interval at T2, as load transfer transition (load transient), output control unit 42 produces control signal ctrl by the slope of detecting output voltage Vout, to control the first diverter switch SW1 of output stage 31, and then make inductive current IL no longer to output capacitance Cout charging, to solve output voltage Vout overshooting problem.In Figure 5, dotted portion is the original response of known DC-DC converter, and solid line is then the Circuit responce after the present embodiment improvement.
In the present invention, the control signal ctrl that slope detecting controller 33 provides can be provided to each element in pulse wave width modulation control unit 32, to be affected the operation of pulse wave width modulation control unit 32 by control signal ctrl, and then close the first diverter switch SW1 of (turn off) output stage 31, can not continue to make output voltage Vout to raise.
Fig. 6 A ~ 8C illustrates the circuit diagram of each embodiment of the control mode of slope of the present invention detecting controller.Fig. 6 A illustrates the circuit diagram of the first embodiment of the control mode according to slope detecting controller of the present invention.In fig. 6, slope detecting controller 33 couples the driver 324 of pulse wave width modulation control unit 32, in order to provide control signal ctrl to driver 324, the first diverter switch signal UG to the first diverter switch SW1 is exported to make driver 324, with positive closing (turn off) the first diverter switch SW1, inductive current IL is caused to stop charging to output capacitance Cout.
Fig. 6 B illustrates the drive circuit schematic diagram of the first embodiment of the control mode according to slope detecting controller of the present invention.In fig. 6b, when control signal ctrl is such as high levle, no matter the time signal TON of time signal generator 323 is conducting or closedown, and driver 324 all can export the first diverter switch SW1 of the first diverter switch signal UG to output stage 31, to close the first diverter switch SW1.Namely control signal ctrl priority is greater than ON time signal TON.
Fig. 7 A illustrates the circuit diagram of the second embodiment of the control mode according to slope detecting controller of the present invention.In fig. 7, slope detecting controller 33 couples time signal generator 323, in order to provide control signal ctrl control time signal generator 323, stop making time signal generator 323 providing ON time signal (TON) to driver 324, and then positive closing (turn off) the first diverter switch SW1, make inductive current IL stop charging to output capacitance Cout.
Fig. 7 B illustrates the circuit diagram of the time signal generator of the second embodiment of the control mode according to slope detecting controller of the present invention.In figure 7b, when the first comparator 322 provides triggering signal to time signal generator 323, then time signal generator 323 provides a constant on-time signal TON (or constant-off-time signal) to driver 324, to control the operation of output stage 31 according to triggering signal.But when slope detecting controller 33 provides control signal ctrl to time signal generator 323, then time signal generator 323 will stop providing ON time signal TON to driver 324 according to its internal wiring logic.That is, the control signal ctrl that slope detecting controller 33 provides can force the generation ending ON time signal TON.Namely control signal ctrl has the highest priority.
Fig. 8 A illustrates the circuit diagram of the 3rd embodiment of the control mode according to slope detecting controller of the present invention.In fig. 8 a, pulse wave width modulation control unit 32 also comprises pulse wave width modulation generator 325.Slope detecting controller 33 couples the pulse wave width modulation generator 325 of pulse wave width modulation control unit 32, control pulse wave width modulation generator 325 to provide control signal ctrl to stop providing pulse wave width modulation signal pwm to driver 324, to force cut-off (cut-off) ongoing turn-on cycle (Ton), driver 324 is made to close the first diverter switch SW1.
Fig. 8 B illustrates the departure signal circuit schematic diagram of the 3rd embodiment of the control mode according to slope detecting controller of the present invention.In the fig. 8b, pulse wave width modulation generator 325 more comprises error amplifier 321 and the first comparator 322.Slope detecting controller 33 is coupled between error amplifier 321 and the first comparator 322, in order to provide the error signal ERR of control signal ctrl departure amplifier 321, stop providing pulse wave width modulation signal pwm to control pulse wave width modulation generator 325, to force to end ongoing turn-on cycle, driver 324 is made to close the first diverter switch SW1.In the present embodiment, the meaning representated by control signal ctrl departure signal ERR is: the error signal ERR that control signal ctrl can make error amplifier 321 provide toward pull-up or toward drop-down, to affect the generation of pulse wave width modulation signal pwm.In other embodiments, control signal ctrl also can carry out adding up or other various computings, not as limit with error signal ERR.
Fig. 8 C illustrates the control ramp signal circuit diagram of the 3rd embodiment of the control mode according to slope detecting controller of the present invention.In Fig. 8 C, pulse wave width modulation generator 325 also comprises ramp signal generator 326.The first input end of the first comparator 322 couples error amplifier 321, and the second input of the first comparator 322 couples ramp signal generator 326.Slope detecting controller 33 couples ramp signal generator 326, in order to the ramp signal ramp providing control signal ctrl to control ramp signal generator 326, stop providing pulse wave width modulation signal pwm to control pulse wave width modulation generator 325, to force to end ongoing turn-on cycle, driver 324 is made to close the first diverter switch SW1.Be similar to Fig. 8 B, in Fig. 8 C, the meaning that control signal ctrl controls representated by ramp signal ramp is: control signal ctrl can make ramp signal ramp toward pull-up or toward drop-down, to affect the generation of pulse wave width modulation signal pwm.In other embodiments, control signal ctrl also can carry out adding up or other various computings, not as limit with ramp signal ramp.
Another specific embodiment according to the present invention is a kind of slope detecting control method of power supply changeover device.Please refer to Fig. 9, Fig. 9 illustrates the flow chart of the slope detecting control method of the power supply changeover device of this embodiment.Relevant its illustrates, respects please with reference to Fig. 3 and Fig. 4.In step S905, slope detecting unit 41 couples output and the output control unit 42 of power supply changeover device 300 respectively, to receive the output voltage Vout of power supply changeover device.In step S910, said method utilizes slope detecting unit 41 to provide slope detection signal SD according to output voltage Vout.In step S915, said method utilizes output control unit 42 to produce control signal ctrl, and when slope detection signal SD exceedes above-mentioned preset value STL, said method is to produce control signal ctrl according to slope detection signal SD.In step S920, said method provides control signal ctrl to control power supply changeover device 300.
Compared to background technology, according to power supply changeover device of the present invention and slope detecting controller and method can convert the moment of underloading at load current to by heavy duty, ongoing turn-on cycle is directly ended by the mode being opened circuit controls by the slope and use detecting output voltage, effectively to suppress the phenomenon of output voltage overshoot, therefore the output voltage of power supply changeover device can be made to continue overshoot.
By the above detailed description of preferred embodiments, be wish clearly to describe feature of the present invention and spirit, and not with above-mentioned disclosed preferred embodiment, category of the present invention limited.On the contrary, its objective is wish to contain various change and tool equality be arranged in the present invention institute in the category of claim applied for.
Claims (15)
1. a slope detecting controller for power supply changeover device, is characterized in that, above-mentioned slope detecting controller comprises:
One slope detecting unit, receives an output voltage of above-mentioned power supply changeover device, and produces a slope detection signal according to above-mentioned output voltage; And
One output control unit, couples above-mentioned slope detecting unit, and provides a control signal according to above-mentioned slope detection signal, to control above-mentioned power supply changeover device.
2. slope detecting controller as claimed in claim 1, it is characterized in that, when above-mentioned slope detection signal is more than a preset value, above-mentioned output control unit produces above-mentioned control signal.
3. slope detecting controller as claimed in claim 1, it is characterized in that, above-mentioned control signal is in order to close one first diverter switch of above-mentioned power supply changeover device.
4. slope detecting controller as claimed in claim 1, it is characterized in that, control signal is in order to end an ON time signal of a time signal generator of above-mentioned power supply changeover device.
5. slope detecting controller as claimed in claim 4, it is characterized in that, above-mentioned control signal is in order to end a pulse wave width modulation signal of above-mentioned power supply changeover device.
6. a power supply changeover device, is characterized in that, above-mentioned power supply changeover device comprises:
One output stage, comprises one first diverter switch;
One pulse wave width modulation control unit, couples above-mentioned output stage, and controls the operation of the first diverter switch of above-mentioned output stage; And
One slope detecting controller, couple above-mentioned pulse wave width modulation control unit, in order to produce a slope detection signal according to an output voltage of above-mentioned power supply changeover device, and produce a control signal according to above-mentioned slope detection signal, control above-mentioned first diverter switch to make above-mentioned pulse wave width modulation control unit and close.
7. power supply changeover device as claimed in claim 6, it is characterized in that, above-mentioned output stage also comprises one second diverter switch, and above-mentioned first diverter switch is a switch on the bridge, and above-mentioned second diverter switch is a bridge switch.
8. power supply changeover device as claimed in claim 6, it is characterized in that, above-mentioned pulse wave width modulation control unit comprises a driver, and above-mentioned slope detecting controller couples above-mentioned driver, makes above-mentioned control signal control above-mentioned driver and closes above-mentioned first diverter switch.
9. power supply changeover device as claimed in claim 6, it is characterized in that, above-mentioned pulse wave width modulation control unit comprises a time signal generator, above-mentioned slope detecting controller couples above-mentioned time signal generator, make above-mentioned control signal control above-mentioned time signal generator to stop providing an ON time signal, to close above-mentioned first diverter switch.
10. power supply changeover device as claimed in claim 6, it is characterized in that, above-mentioned pulse wave width modulation control unit comprises a pulse wave width modulation generator, above-mentioned slope detecting controller couples above-mentioned pulse wave width modulation generator, make above-mentioned control signal control above-mentioned pulse wave width modulation generator to stop providing a pulse wave width modulation signal, to close above-mentioned first diverter switch.
11. power supply changeover devices as claimed in claim 10, it is characterized in that, above-mentioned pulse wave width modulation generator comprises an error amplifier and one first comparator, above-mentioned slope detecting controller is coupled between above-mentioned error amplifier and above-mentioned first comparator, makes above-mentioned pulse wave width modulation generator stop providing above-mentioned pulse wave width modulation signal in order to the error signal affecting above-mentioned error amplifier by above-mentioned control signal.
12. power supply changeover devices as claimed in claim 10, it is characterized in that, above-mentioned pulse wave width modulation generator comprises an error amplifier, one first comparator and a ramp signal generator, one first input end of above-mentioned first comparator couples above-mentioned error amplifier, one second input of above-mentioned first comparator couples above-mentioned ramp signal generator, above-mentioned slope detecting controller couples above-mentioned ramp signal generator, above-mentioned pulse wave width modulation generator is made to stop providing above-mentioned pulse wave width modulation signal in order to the ramp signal affecting above-mentioned ramp signal generator by above-mentioned control signal.
13. power supply changeover devices as claimed in claim 6, it is characterized in that, above-mentioned slope detecting controller comprises a slope detecting unit and an output control unit, above-mentioned slope detecting unit is for a differential circuit is to provide a slope detection signal, and above-mentioned output control unit produces above-mentioned control signal according to above-mentioned slope detection signal.
The slope detecting control method of 14. 1 kinds of power supply changeover devices, is characterized in that, above-mentioned slope detecting control method comprises the following steps:
Receive an output voltage of above-mentioned power supply changeover device;
A slope detection signal is provided according to above-mentioned output voltage; And
A control signal is produced, to control above-mentioned power supply changeover device according to above-mentioned slope detection signal.
15. slope detecting control methods as claimed in claim 14, is characterized in that, when above-mentioned slope detection signal is more than a preset value, produce above-mentioned control signal.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106505845A (en) * | 2016-12-27 | 2017-03-15 | 上海灿瑞科技股份有限公司 | A kind of compensating electric capacity clamp circuit for improving repeatedly quick power-on and power-off loop response |
| CN107947571A (en) * | 2017-11-14 | 2018-04-20 | 上海斐讯数据通信技术有限公司 | A kind of DC DC Switching Power Supplies and its inductance are uttered long and high-pitched sounds removing method |
| CN110504829A (en) * | 2018-05-16 | 2019-11-26 | 力智电子股份有限公司 | DC-DC conversion circuit and its control method |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101282086A (en) * | 2007-04-02 | 2008-10-08 | 点晶科技股份有限公司 | Voltage converter and related converting method |
| US20130257399A1 (en) * | 2012-03-27 | 2013-10-03 | Chengdu Monolithic Power Systems Co., Ltd. | Constant on-time switching converter and control method thereof |
| CN203596745U (en) * | 2013-08-19 | 2014-05-14 | 力智电子股份有限公司 | DC-DC controller |
-
2013
- 2013-11-27 CN CN201310612968.5A patent/CN104682679B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101282086A (en) * | 2007-04-02 | 2008-10-08 | 点晶科技股份有限公司 | Voltage converter and related converting method |
| US20130257399A1 (en) * | 2012-03-27 | 2013-10-03 | Chengdu Monolithic Power Systems Co., Ltd. | Constant on-time switching converter and control method thereof |
| CN203596745U (en) * | 2013-08-19 | 2014-05-14 | 力智电子股份有限公司 | DC-DC controller |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106505845A (en) * | 2016-12-27 | 2017-03-15 | 上海灿瑞科技股份有限公司 | A kind of compensating electric capacity clamp circuit for improving repeatedly quick power-on and power-off loop response |
| CN106505845B (en) * | 2016-12-27 | 2018-10-02 | 上海灿瑞科技股份有限公司 | A kind of compensating electric capacity clamp circuit improving repeatedly quick power-on and power-off loop response |
| CN107947571A (en) * | 2017-11-14 | 2018-04-20 | 上海斐讯数据通信技术有限公司 | A kind of DC DC Switching Power Supplies and its inductance are uttered long and high-pitched sounds removing method |
| CN110504829A (en) * | 2018-05-16 | 2019-11-26 | 力智电子股份有限公司 | DC-DC conversion circuit and its control method |
| CN110504829B (en) * | 2018-05-16 | 2022-02-18 | 力智电子股份有限公司 | DC-DC conversion circuit and control method thereof |
| CN112383224A (en) * | 2020-11-19 | 2021-02-19 | 深圳英集芯科技有限公司 | BOOST circuit for improving transient response and application method thereof |
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| CN104682679B (en) | 2017-09-01 |
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