CN102347688A - DCDC (direct current/direct current) power supply converting and controlling device and switching power supply - Google Patents
DCDC (direct current/direct current) power supply converting and controlling device and switching power supply Download PDFInfo
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- CN102347688A CN102347688A CN2010102444583A CN201010244458A CN102347688A CN 102347688 A CN102347688 A CN 102347688A CN 2010102444583 A CN2010102444583 A CN 2010102444583A CN 201010244458 A CN201010244458 A CN 201010244458A CN 102347688 A CN102347688 A CN 102347688A
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Abstract
The invention provides a DCDC (direct current/direct current) power supply converting and controlling device. In the process of controlling a DCDC main circuit switching tube, the device comprises a turn-off control unit, a switch-on control unit, a logic unit and a drive unit; the turn-off control unit is used for generating a discharging control signal for controlling turn-off of the switching tube in the DCDC main circuit when the current on an energy storage inductor in the DCDC main circuit reaches the preset peak current; the switch-on control unit is used for generating a charging control signal for controlling switch-on of the switching tube in the DCDC main circuit when the current on the energy storage inductor in the DCDC main circuit is reduced from the preset peak current to the preset valley current; the logic unit is used for generating a switch control signal according to the charging control signal and the discharging control signal; and the drive unit is used for controlling the switch-on and the turn-off of the switching tube in the DCDC main circuit according to the switch control signal, so that the discharging time of the inductor in the working process of the DCDC main circuit becomes the fixed value, and the stability of the system can be ensured without the need of a slope compensation module.
Description
Technical field
The present invention relates to a kind of DCDC power source conversion control device and Switching Power Supply.
Background technology
The more and more rechargable power supplies that adopted of current portable formula product, need discharge and charge electric quantity of power supply has good management, needs the electric weight of implementation efficiency to transform, and stable, safe and reliable management function.Because the linear power supply conversion efficiency is low, the fatal shortcoming that caloric value is big all adopts the high Switching Power Supply of conversion efficiency in a lot of schemes.The Switching Power Supply conversion is flexible, has that multiple structure such as BUCK, BOOST realizes step-down, function such as boost, and simultaneously bigger load current can be provided, so Switching Power Supply has obtained using widely.
In the Switching Power Supply control method, the peak current control method has the incomparable advantage of voltage mode control method and has obtained using very widely, becomes the main flow control method; Traditional peak current control method is a fixed frequency, regulates the PWM control mode of pulsewidth, for example fixed clock unlatching, peak current closing control pattern etc.But this peak current PWM control mode has intrinsic shortcoming: when duty ratio greater than 50% the time, the problem of circular current ring job insecurity in existing needs the slope compensation module could guarantee stablizing of system.
Summary of the invention
The technical problem that the present invention will solve is: existing DCDC power source conversion control device voltage, current ripples problem of unstable.
For solving the problems of the technologies described above, the embodiment of the invention provides following technical scheme:
A kind of DCDC power source conversion control device is in order to control a DCDC main circuit output voltage; Said DCDC power source conversion control device comprises:
Turn-off control unit, link to each other, when the electric current in the DCDC main circuit on the energy storage inductor reaches the pre-set peak value electric current, produce the discharge control signal that switching tube turn-offs in the control DCDC main circuit with said DCDC main circuit;
The conducting control unit; Link to each other with DCDC main circuit and shutoff control unit respectively; When the electric current in the DCDC main circuit on the energy storage inductor drops to preset valley point current by the pre-set peak value electric current, produce the charging control signal of switching tube conducting in the control DCDC main circuit;
Logical block links to each other with the conducting control unit with said shutoff control unit respectively, in order to produce switch controlling signal according to said discharge control signal and charging control signal;
Driver element and is stated logical block and is linked to each other, in order to conducting and the shutoff according to switching tube in the said switch controlling signal control DCDC main circuit.
Further, said shutoff control unit comprises: the peak current comparing unit, and in order to the charging current detection signal of said energy storage inductor and said pre-set peak value current signal compares and according to comparative result output discharge control signal.
Further, said charging current detection signal detects the resistance generation by being series at first in the DCDC main circuit charge circuit.
Further, the variation of said pre-set peak value current signal reflection DCDC main circuit output voltage.
Further, said conducting control unit comprises: the inductive discharge timing unit, link to each other with the shutoff control unit, and receive discharge control signal and pick up counting, timing is exported charging control signal after a scheduled time.
Further, said DCDC main circuit is the voltage-dropping type power-switching circuit.
Further, said DCDC main circuit is the booster type power-switching circuit.
Further, said DCDC main circuit is the buck-boost type power-switching circuit.
Further, said logical block is a rest-set flip-flop.
The present invention also provides the Switching Power Supply that comprises above-mentioned DCDC power source conversion control device.
A kind of DCDC power source conversion control device provided by the present invention; In process to DCDC main circuit switch management and control system; Turn-off control unit; When the electric current in the DCDC main circuit on the energy storage inductor reaches the pre-set peak value electric current, produce the discharge control signal that switching tube turn-offs in the control DCDC main circuit; When conducting control unit, the electric current in the DCDC main circuit on the energy storage inductor drop to preset valley point current by the pre-set peak value electric current, produce the charging control signal of switching tube conducting in the control DCDC main circuit; Make that thus become fixed value the discharge time of inductance in the DCDC main circuit course of work, do not need the slope compensation module just can guarantee the stable of system.
Description of drawings
Fig. 1 is the theory diagram of the embodiment of the invention one;
Fig. 2 is the DCDC main circuit diagram of the embodiment of the invention two;
Fig. 3 is the theory diagram of the shutoff control unit of the embodiment of the invention two;
Fig. 4 is the circuit diagram that the peak current of the embodiment of the invention two is set;
Fig. 5 is the circuit diagram of the inductive discharge timing unit of the embodiment of the invention two;
Fig. 6 is the circuit diagram of the embodiment of the invention two logical blocks;
Fig. 7 is the DCDC main circuit diagram of the embodiment of the invention three;
Fig. 8 is the theory diagram of the shutoff control unit of the embodiment of the invention three;
Fig. 9 is the circuit diagram that the peak current of the embodiment of the invention three is set;
Figure 10 is the circuit diagram of the inductive discharge timing unit of the embodiment of the invention three;
Figure 11 is the circuit diagram of the embodiment of the invention three logical blocks;
Embodiment
Clearer for technical problem, technical scheme and beneficial effect that the present invention is solved, below in conjunction with accompanying drawing and embodiment, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explanation the present invention, and be not used in qualification the present invention.
Embodiment one:
Fig. 1 is the theory diagram of the embodiment of the invention; A kind of DCDC power source conversion control device 10 as shown in Figure 1 is in order to control a DCDC main circuit 20 output voltages; Said DCDC power source conversion control device comprises: turn-off control unit, link to each other with said DCDC main circuit, when the electric current in the DCDC main circuit on the energy storage inductor reaches the pre-set peak value electric current, produce the discharge control signal that switching tube turn-offs in the control DCDC main circuit; The conducting control unit; Link to each other with DCDC main circuit and shutoff control unit respectively; When the electric current in the DCDC main circuit on the energy storage inductor drops to preset valley point current by the pre-set peak value electric current, produce the charging control signal of switching tube conducting in the control DCDC main circuit; Logical block links to each other with the conducting control unit with said shutoff control unit respectively, in order to produce switch controlling signal according to said discharge control signal and charging control signal; Driver element and is stated logical block and is linked to each other, in order to conducting and the shutoff according to switching tube in the said switch controlling signal control DCDC main circuit.
Wherein, said shutoff control unit is specially the peak current comparing unit, in order to the charging current detection signal of said energy storage inductor and a pre-set peak value current signal compares and according to comparative result output discharge control signal.
Wherein, said charging current detection signal detects the resistance generation by being series at first in the DCDC main circuit charge circuit.
Wherein, the variation of said pre-set peak value current signal reflection DCDC main circuit output voltage, for example the constant voltage with the output of DCDC main circuit is preset peak-current signal.
Wherein, said conducting control unit comprises: the inductive discharge timing unit, link to each other with the shutoff control unit, and receive discharge control signal and pick up counting, timing is exported charging control signal after a scheduled time.
Embodiment two
Embodiment two is on the basis of embodiment one, is example with control voltage-dropping type DCDC main circuit, and the present invention is further specified:
Fig. 2 is the DCDC main circuit diagram of the embodiment of the invention two; Be specially voltage-dropping type DCDC power-switching circuit, mainly form by switching tube Q1, inductance L 1, capacitor C 1, continued flow tube; Wherein switching tube Q1 is the PMOS pipe, and its source electrode meets direct voltage VCC through resistance R sen, and in order to detect the charging current of inductance L 1, the node between resistance R sen and the switching tube Q1 is exported charging current detection signal Vsen at this resistance R sen; Switching tube Q1 drain electrode links to each other with ground through continued flow tube; Wherein DRV is the control end of switching tube Q1; One end of inductance L 1 is connected between switching tube Q1 and the continued flow tube, and the other end of inductance L 1 links to each other with a pole plate of capacitor C 1, and another pole plate of capacitor C 1 links to each other with ground.
Fig. 3 is the theory diagram of the shutoff control unit of the embodiment of the invention two; Said shutoff control unit is specially peak current comparing unit CI; A charging current detection signal Vsen and a pre-set peak value current signal V_PEAK_SET in order to said energy storage inductor compare; When both are equal; Then inductive current reaches the peak current I_PEAK that sets, peak current comparing unit output discharge control signal PEAK_OK.
Fig. 4 is the circuit diagram that the peak current of the embodiment of the invention two is set; It comprises operational amplifier OPA1, nmos switch pipe Q2, resistance R 2; The first input end of operational amplifier OPA1 links to each other with output voltage feedback signal Vset; The variation of output voltage feedback signal Vset reflection DCDC main circuit output voltage, for example the voltage VOUT with the output of DCDC main circuit sets the pre-set peak value current signal; Second input of operational amplifier OPA1 links to each other with the source electrode of switching tube Q2; The source electrode of switching tube Q2 also links to each other with ground through resistance R 2; The drain electrode of switching tube Q2 links to each other with VCC through current source I1; Hence one can see that, and operational amplifier OPA1 and switching tube Q2 constitute a source follow circuit; And form a constant-current source I1 with resistance R 2; Pre-set peak value current signal V_PEAK_SET is proportional current A*I1 that VCC deducts I1 the poor of pressure drop that resistance R set produced of flowing through; A is the proportionality constant greater than 0, can adjust according to actual needs.
Fig. 5 is the circuit diagram of the inductive discharge timing unit of the embodiment of the invention two; It comprises operational amplifier OPA2, nmos switch pipe Q3, resistance R 3; The first input end of operational amplifier OPA2 links to each other with the pressure reduction at afterflow state DCDC main circuit inductance two ends, equals DCDC main circuit output voltage VO UT for the pressure reduction at step-down DCDC power-switching circuit afterflow state DCDC main circuit inductance two ends;
In the present embodiment, the reality that the first input end of operational amplifier OPA2 inserts is B*VOUT, and B is the proportionality constant greater than 0, can adjust according to actual needs; Second input of operational amplifier links to each other with the source electrode of switching tube Q3; The source electrode of switching tube Q3 also links to each other with ground through resistance R 3; The drain electrode of switching tube Q3 links to each other with VCC through current source I2; Hence one can see that, and operational amplifier OPA2 and switching tube Q3 constitute a source follow circuit, and form a constant-current source I2 with resistance R 3; The inductive discharge timing unit also comprises comparator C OMP1, capacitor C 2, and the first input end of comparator C OMP1 links to each other with the proportional current E*I2 of I2 through switch S 1, and E is the proportionality constant greater than 0, can adjust according to actual needs; The first input end of comparator C OMP1 also links to each other with ground through switch S 2, and a pole plate of capacitor C 2 is connected between what switch S 2 of first input end of comparator C OMP1, and another pole plate of capacitor C 2 links to each other with ground; When inductive current reaches peak value, to turn-off control unit and produce the discharge control signal PEAK_OK that switching tube turn-offs in the control DCDC main circuit, this moment, discharge control signal PEAK_OK converted the timing triggering signal T of inductive discharge timing unit into through logical process
OFF_ START; Control switch S1 conducting; Switch S 2 is closed; Proportional current E*I2 begins capacitor C 2 is charged; When voltage V_CAL reaches reference voltage V REF_CAL on the capacitor C 2; Illustrate that inductive current reaches preset valley point current, the charging control signal T of switching tube conducting in the comparator C OMP1 output control DCDC main circuit
OFF_ OVER;
Fig. 6 is the circuit diagram of the embodiment of the invention two logical blocks; It is specially a rest-set flip-flop, R termination discharge control signal PEAK_OK, S termination charging control signal T
OFFControl end of switching tube links to each other among _ the OVER, Q end and DCDC main circuit, and Q is counter to be held, and exports timing triggering signal T
OFF_ START, T
OFF_ START and T
OFFThe time difference of _ OVER is the scheduled time of inductive discharge timing unit.
Embodiment three
Embodiment three is on the basis of embodiment one, is example with control step-up DC/DC main circuit, and the present invention is further specified:
Fig. 7 is the DCDC main circuit diagram of the embodiment of the invention three; Be specially voltage-dropping type DCDC power-switching circuit, mainly form by switching tube Q4, inductance L 2, capacitor C 3, continued flow tube; Wherein switching tube Q4 is the NMOS pipe, and its source electrode is through resistance R sen1 ground connection, and in order to detect the charging current of inductance L 2, the node between resistance R sen1 and the switching tube Q4 is exported charging current detection signal Vsen1 at this resistance R sen1; Switching tube Q4 drain electrode meets power supply VCC through inductance L 2, and wherein DRV1 is the control end of switching tube Q4; One end of continued flow tube is connected between switching tube Q4 and the inductance L 2, and the other end of continued flow tube links to each other with a pole plate of capacitor C 3, and another pole plate of capacitor C 3 links to each other with ground.
Fig. 8 is the theory diagram of the shutoff control unit of the embodiment of the invention three; Said shutoff control unit is specially peak current comparing unit CI1; A charging current detection signal Vsen1 and a pre-set peak value current signal V_PEAK_SET1 in order to said energy storage inductor compare; When both are equal; Then inductive current reaches the peak current I_PEAK1 that sets, peak current comparing unit output discharge control signal PEAK_OK1.
Fig. 9 is the circuit diagram that the peak current of the embodiment of the invention three is set; It comprises operational amplifier OPA3, nmos switch pipe Q5, resistance R 4; The first input end of operational amplifier OPA1 links to each other with output voltage feedback signal Vset1; Output voltage feedback signal Vset1 reflection DCDC main circuit output voltage volume changes, and for example the voltage VOUT with the output of DCDC main circuit sets the pre-set peak value current signal; Second input of operational amplifier OPA3 links to each other with the source electrode of switching tube Q5; The source electrode of switching tube Q5 also links to each other with ground through resistance R 4; The drain electrode of switching tube Q4 links to each other with VCC through current source I3; Hence one can see that, and operational amplifier OPA3 and switching tube Q5 constitute a source follow circuit; And form a constant-current source I3 with resistance R 4; V_PEAK_SET1 is the proportional current C*I3 pressure drop that resistance R set1 produced of flowing through, and C is the proportionality constant greater than 0, can adjust according to actual needs.
Figure 10 is the circuit diagram of the inductive discharge timing unit of the embodiment of the invention three; Pressure reduction for boost DC/DC power-switching circuit afterflow state DCDC main circuit inductance two ends equals the poor of DCDC main circuit output voltage VO UT and input voltage VIN;
The circuit of inductive discharge timing unit comprises operational amplifier OPA4, nmos switch pipe Q6, resistance R 5; The first input end of operational amplifier OPA4 links to each other with afterflow state DCDC main circuit output voltage; In the present embodiment; The reality that the first input end of operational amplifier OPA4 inserts is the proportionality constant greater than 0 for F*VOUT F, can adjust according to actual needs; Second input of operational amplifier OPA4 links to each other with the source electrode of switching tube Q6; The source electrode of switching tube Q6 also links to each other with ground through resistance R 5; The drain electrode of switching tube Q6 links to each other with VCC through current source I4; Hence one can see that, and operational amplifier OPA4 and switching tube Q6 constitute a source follow circuit, and form a constant-current source I4 with resistance R 5;
The circuit of inductive discharge timing unit also comprises operational amplifier OPA5, nmos switch pipe Q7, resistance R 6; The first input end of operational amplifier OPA5 links to each other with the main circuit input voltage; In the present embodiment; The reality that the first input end of operational amplifier OPA4 inserts is G*VIN; G is the proportionality constant greater than 0, can adjust according to actual needs; Second input of operational amplifier OPA5 links to each other with the source electrode of switching tube Q7; The source electrode of switching tube Q7 also links to each other with ground through resistance R 6; The drain electrode of switching tube Q7 links to each other with VCC through current source I5; Hence one can see that, and operational amplifier OPA5 and switching tube Q7 constitute a source follow circuit, and form a constant-current source I5 with resistance R 6;
The inductive discharge timing unit also comprises comparator C OMP2, capacitor C 4, and the first input end of comparator C OMP2 links to each other with the proportional current H*I6 of I6 through switch S 10, and H is the proportionality constant greater than 0, can adjust according to actual needs; I6=I5-I4 wherein; The first input end of comparator C OMP2 also links to each other with ground through switch S 20, and a pole plate of capacitor C 4 is connected between the first input end and switch S 20 of comparator C OMP2, and another pole plate of capacitor C 4 links to each other with ground; When inductive current reaches peak value, to turn-off control unit and produce the discharge control signal PEAK_OK1 that switching tube turn-offs in the control DCDC main circuit, this moment, discharge control signal PEAK_OK1 converted the timing triggering signal T of inductive discharge timing unit into through logical process
OFF_ START1; Control switch S10 conducting; Switch S 20 is closed; Proportional current H*I6 begins capacitor C 4 is charged; When voltage V_CAL1 reaches reference voltage V REF_CAL1 on the capacitor C 4; Illustrate that inductive current reaches preset valley point current, the charging control signal T of switching tube conducting in the comparator C OMP2 output control DCDC main circuit
OFF_ OVER1;
Figure 11 is the circuit diagram of the embodiment of the invention three logical blocks; It is specially a rest-set flip-flop, R termination discharge control signal PEAK_OK1, S termination charging control signal T
OFFControl end of switching tube DRV1 links to each other among _ the OVER1, Q end and DCDC main circuit, and anti-end of Q exported timing triggering signal T
OFF_ START1, T
OFF_ START1 and T
OFFThe time difference of _ OVER1 is the scheduled time of inductive discharge timing unit.
The above only is preferred embodiment of the present invention, not in order to restriction the present invention, all any modifications of within spirit of the present invention and principle, being done, is equal to and replaces and improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. DCDC power source conversion control device is in order to control a DCDC main circuit output voltage; It is characterized in that: said DCDC power source conversion control device comprises:
Turn-off control unit, link to each other, when the electric current in the DCDC main circuit on the energy storage inductor reaches the pre-set peak value electric current, produce the discharge control signal that switching tube turn-offs in the control DCDC main circuit with said DCDC main circuit;
The conducting control unit; Link to each other with DCDC main circuit and shutoff control unit respectively; When the electric current in the DCDC main circuit on the energy storage inductor drops to preset valley point current by the pre-set peak value electric current, produce the charging control signal of switching tube conducting in the control DCDC main circuit;
Logical block links to each other with the conducting control unit with said shutoff control unit respectively, in order to produce switch controlling signal according to said discharge control signal and charging control signal;
Driver element and is stated logical block and is linked to each other, in order to conducting and the shutoff according to switching tube in the said switch controlling signal control DCDC main circuit.
2. DCDC power source conversion control device according to claim 1; It is characterized in that: said shutoff control unit comprises: the peak current comparing unit, and in order to the charging current detection signal of said energy storage inductor and said pre-set peak value current signal compares and according to comparative result output discharge control signal.
3. DCDC power source conversion control device according to claim 2 is characterized in that: said charging current detection signal detects the resistance generation by being series at first in the DCDC main circuit charge circuit.
4. DCDC power source conversion control device according to claim 2 is characterized in that: the variation of said pre-set peak value current signal reflection DCDC main circuit output voltage.
5. DCDC power source conversion control device according to claim 1; It is characterized in that: said conducting control unit comprises: the inductive discharge timing unit, link to each other with the shutoff control unit, and receive discharge control signal and pick up counting; Timing is exported charging control signal after a scheduled time.
6. DCDC power source conversion control device according to claim 1 is characterized in that: said DCDC main circuit is the voltage-dropping type power-switching circuit.
7. DCDC power source conversion control device according to claim 1 is characterized in that: said DCDC main circuit is the booster type power-switching circuit.
8. DCDC power source conversion control device according to claim 1 is characterized in that: said DCDC main circuit is the buck-boost type power-switching circuit.
9. DCDC power source conversion control device according to claim 1 is characterized in that: said logical block is a rest-set flip-flop.
10. a Switching Power Supply is characterized in that: comprise each described DCDC power source conversion control device of claim 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010244458.3A CN102347688B (en) | 2010-07-29 | 2010-07-29 | DCDC (direct current/direct current) power supply converting and controlling device and switching power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010244458.3A CN102347688B (en) | 2010-07-29 | 2010-07-29 | DCDC (direct current/direct current) power supply converting and controlling device and switching power supply |
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| CN102347688A true CN102347688A (en) | 2012-02-08 |
| CN102347688B CN102347688B (en) | 2014-12-10 |
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| CN201010244458.3A Active CN102347688B (en) | 2010-07-29 | 2010-07-29 | DCDC (direct current/direct current) power supply converting and controlling device and switching power supply |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103312169A (en) * | 2013-06-28 | 2013-09-18 | 电子科技大学 | Direct current (DC)-DC converter with adjustable inductor discharging slope |
| CN104348475A (en) * | 2013-07-26 | 2015-02-11 | 无锡华润矽科微电子有限公司 | Power supply anti-interference circuit and method thereof |
| CN106253674A (en) * | 2015-06-12 | 2016-12-21 | 英飞凌科技股份有限公司 | Pulse density modulated fast current control device |
| US10784783B1 (en) | 2020-01-06 | 2020-09-22 | Nxp B.V. | Charge-cycle control for burst-mode DC-DC converters |
| CN111837326A (en) * | 2020-05-15 | 2020-10-27 | 深圳市汇顶科技股份有限公司 | Power management circuit, chip and equipment |
| US11038427B1 (en) | 2020-01-06 | 2021-06-15 | Nxp B.V. | Charge-cycle control for burst-mode DC-DC converters |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5612609A (en) * | 1992-07-03 | 1997-03-18 | Samsung Electronics Co., Ltd. | Continuous conduction mode switching power supply with improved power factor correction |
| US5734259A (en) * | 1995-09-29 | 1998-03-31 | Cherry Semiconductor Corporation | Balanced delta current method for current control in a hysteretic power supply |
| CN1904789A (en) * | 2005-07-28 | 2007-01-31 | 半导体元件工业有限责任公司 | Current regulator and method therefor |
| CN101572974A (en) * | 2009-04-17 | 2009-11-04 | 上海晶丰明源半导体有限公司 | High efficiency constant current LED drive circuit and drive method |
-
2010
- 2010-07-29 CN CN201010244458.3A patent/CN102347688B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5612609A (en) * | 1992-07-03 | 1997-03-18 | Samsung Electronics Co., Ltd. | Continuous conduction mode switching power supply with improved power factor correction |
| US5734259A (en) * | 1995-09-29 | 1998-03-31 | Cherry Semiconductor Corporation | Balanced delta current method for current control in a hysteretic power supply |
| CN1904789A (en) * | 2005-07-28 | 2007-01-31 | 半导体元件工业有限责任公司 | Current regulator and method therefor |
| CN101572974A (en) * | 2009-04-17 | 2009-11-04 | 上海晶丰明源半导体有限公司 | High efficiency constant current LED drive circuit and drive method |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103312169A (en) * | 2013-06-28 | 2013-09-18 | 电子科技大学 | Direct current (DC)-DC converter with adjustable inductor discharging slope |
| CN104348475A (en) * | 2013-07-26 | 2015-02-11 | 无锡华润矽科微电子有限公司 | Power supply anti-interference circuit and method thereof |
| CN104348475B (en) * | 2013-07-26 | 2018-03-20 | 无锡华润矽科微电子有限公司 | A kind of power supply anti-jamming circuit and its method |
| CN106253674A (en) * | 2015-06-12 | 2016-12-21 | 英飞凌科技股份有限公司 | Pulse density modulated fast current control device |
| US10784783B1 (en) | 2020-01-06 | 2020-09-22 | Nxp B.V. | Charge-cycle control for burst-mode DC-DC converters |
| US11038427B1 (en) | 2020-01-06 | 2021-06-15 | Nxp B.V. | Charge-cycle control for burst-mode DC-DC converters |
| CN111837326A (en) * | 2020-05-15 | 2020-10-27 | 深圳市汇顶科技股份有限公司 | Power management circuit, chip and equipment |
| CN111837326B (en) * | 2020-05-15 | 2023-12-05 | 深圳市汇顶科技股份有限公司 | Power management circuit, chip and equipment |
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|---|---|
| CN102347688B (en) | 2014-12-10 |
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