CN106505847B - Segmentation soft starting circuit suitable for step-up DC-DC - Google Patents
Segmentation soft starting circuit suitable for step-up DC-DC Download PDFInfo
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- CN106505847B CN106505847B CN201611093638.XA CN201611093638A CN106505847B CN 106505847 B CN106505847 B CN 106505847B CN 201611093638 A CN201611093638 A CN 201611093638A CN 106505847 B CN106505847 B CN 106505847B
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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
- H02M1/36—Means for starting or stopping converters
-
- 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
- H02M1/34—Snubber circuits
-
- 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
- H02M1/34—Snubber circuits
- H02M1/346—Passive non-dissipative snubbers
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Dc-Dc Converters (AREA)
Abstract
The invention discloses a kind of segmentation soft starting circuits suitable for step-up DC-DC, mainly solve the problem of that synchronous switch rostrum is so connected booster type DC-DC circuit during startup and the imbalance of error amplifier causes the surge current even output voltage overshoot of inductance.The circuit includes soft-start module, error amplifier, pulse width modulated comparator, logical drive module, it is characterised in that also has additional precharge unit, exports monitoring unit and logic control element.When chip just powers on, the grid voltage of precharge unit control synchronous switch pipe slowly reduces, and conducting resistance is gradually reduced, and is exported monitoring unit and is exported soft start enable signal to logic control element to control cut-offfing for soft-start module, making DC-DC circuit, output voltage steadily rises during startup.The invention avoids surge current phenomenon is caused because of the mutation of power tube conducting resistance, device performance is protected, can be used for booster type DC-DC circuit.
Description
Technical field
The invention belongs to electronic circuit technology field, in particular to a kind of segmentation soft starting circuit can be used for synchronous boost
In type DC-DC switch power converter.
Background technique
Switch power converter generally utilizes error amplifier, and the sampled signal of output voltage and reference voltage are compared
Compared with carrying out feedback regulation output voltage values.In startup stage, due to there is no charge in output capacitance and voltage cannot be mutated, output
Voltage is started from scratch rising, is far below setting value, error amplifier is made be in complete non-equilibrium state, and inductive current can be directly at this time
The peak point current for rising and reaching and being controlled by clamping voltag is connected, and since corresponding load current is lower, then it can cause surge current
The even overshoot of output voltage damages electronic system.Therefore, soft starting circuit comes into being.
The design philosophy of traditional soft start current-mode booster type DC-DC circuit is on generation one is linear in startup stage
The voltage risen replaces reference voltage to be input to error amplifier, and is compared with feedback voltage, controls the defeated of error amplifier
Signal out.After the voltage of linear rise exceeds reference voltage, error amplifier is switched to reference voltage and feedback voltage carries out
Compare, adjusts output voltage.Soft starting circuit eliminates surge current, avoids the overshoot of output voltage.As shown in Figure 1, should
Circuit includes inductance L11, main switch MN11, synchronous switch pipe MP11, output capacitance COUT1, the equivalent resistance of output capacitance
ESR1, feedback resistance R11 and R12, output loading RLOAD1, soft-start module SOFT, error amplifier EA generate superposition level
Sample rate current ISEN, slope current ISLOPE, reference current IDCWith resistance R13, PWM comparator and driving circuit DRVER.Output
Voltage VOUT forms the reverse input end that feedback voltage FB is input to error amplifier after feedback resistance R11, R12 partial pressure,
The positive input of error amplifier is benchmark voltage.When chip just powers on, the voltage of a linear rise is generated by SOFT circuit
It is compared instead of reference voltage, and with feedback voltage FB, output signal is connected to the reverse input end of PWM comparator.PWM compares
The positive input of device is superposition level, by sample rate current ISEN, slope compensation current ISLOPEWith reference current IDCIt is flowed after superposition
Enter resistance R13 generation.The output end of PWM comparator is connected to driving circuit DRVER, is believed by driving circuit DRVER output driving
Number NG and PG, the alternate conduction of control power tube is that output capacitance charges in each period, and output VOUT is made to reach setting value.
Supply voltage is output capacitance Cout1 charging by inductance L11 and synchronous switch pipe MP11.When by driving circuit
When the driving signal PG that DRVER is generated suddenly becomes logical zero, synchronous switch pipe MP11 is connected suddenly, the conducting resistance wink of MP11
Between reduce, cause inductive current increased dramatically, surge current occur.Surge current can not only damage power tube in circuit and its
Its device also results in the overshoot of output voltage, damages load device.
Summary of the invention
It is an object of the invention in view of the above shortcomings of the prior art, provide a kind of point suitable for step-up DC-DC
Section soft starting circuit turns it on resistance and is gradually reduced, flow through to realize that the grid voltage of control synchronous switch pipe slowly reduces
The electric current of inductance is gradually increased, and avoids the surge of the inductive current due to caused by synchronous switch pipe transient switching, protects device
Energy.
To achieve the above object, the present invention is suitable for the segmentation soft starting circuit of step-up DC-DC, including：Soft start mould
Block 1, error amplifier 2, pulse width modulated comparator 3 and logical drive module 4；Error amplifier 2 equipped with two-way input, all the way with
Soft-start module 1 connects, and another way is connect with feedback voltage FB, and the output end of error amplifier 2 passes through pulse width modulated comparator 3
It is connected with logical drive module 4, which is characterized in that
Precharge unit 5 is had additional between the input terminal and output end of logical drive module 4, for controlling DC-DC circuit
Synchronous switch pipe grid voltage PG gradually decrease, while exporting precharge cut-off signals pre_shut control logic drive module 4
It works normally；
The output end of soft-start module 1 has additional output monitoring unit 6 and logic control element 7, the output monitoring unit
6, soft start enable signal EN_SOFT is exported to logic control element 7, and soft-start module 1 is controlled by logic control element 7
It opens and breaks.
Further, the output monitoring unit 6 is made of an operational amplifier, which connects
Reversed feedthrough voltage FB, reverse input end connect reference level VREF, and the output end and logic control element 7 of the operational amplifier connect
It connects, the soft start enable signal EN_SOFT of output controls opening and breaking for soft-start module 1 by logic control element 7.
Further, the precharge unit 5, including current source I3, two NMOS tubes MN31, MN32, filter resistance R31,
Filter capacitor C31, Schmidt trigger S3 and latch T3, wherein：
The input terminal of current source I3 is connected to supply voltage VCC, and output end is connected to the drain electrode of the first NMOS tube MN31, makees
For mirror current source；
The grid of first NMOS tube MN31 is connected with drain electrode, while being connected to the grid of the second NMOS tube MN32, is used for
Current mirror is constituted, source electrode is connected with the source electrode of the second NMOS tube MN32 and is connected to ground；
The drain electrode of second NMOS tube MN32 is connected to the grid voltage PG of synchronous switch pipe in DC-DC circuit；
An end of filter resistance R31 is connected to the grid voltage PG of synchronous switch pipe, one end of the other end and filter capacitor C31
Connection constitutes RC filter, and the other end of filter capacitor C31 is connected to the source electrode of the second NMOS tube MN32, for synchronizing out
The grid voltage PG for closing pipe is filtered；
The input terminal of Schmidt trigger S3 is connected to the common end of filter capacitor C31 Yu filter resistance R31, and the port is defeated
Signal is signal of the grid voltage PG of synchronous switch pipe after RC filtering out, and the output end of Schmidt trigger S3 connects
It is connected to the input terminal of latch T3, the output end output precharge cut-off signals Pre_shut of latch T3.
Further, the logic control element 7, including an a phase inverter INV4 and NMOS switch pipe MN4, the reverse phase
The input of device INV4 is connected to the output end of output monitoring unit 6, and output is connected to the grid of NMOS switch pipe MN4；Switching tube
Output signal in the drain electrode connection soft-start module 1 of MN4, source electrode ground connection.
The present invention is rigid in chip due to being additionally arranged precharge unit between the input terminal and output end of logical drive module
When powering on, the grid voltage for controlling the synchronous switch pipe in DC-DC circuit is slowly reduced, and is turned it on resistance and is gradually reduced, keeps away
The surge current phenomenon because of caused by the mutation of power tube conducting resistance is exempted from；Simultaneously because the output end in soft-start module increases
If output monitoring unit and logic control element, exports monitoring unit and exports soft start enable signal to logic control element,
Soft-start module is controlled by logic control element to cut-off, makes DC-DC circuit during startup, on output voltage is steady
It rises, avoids the damage to electronic system.
Detailed description of the invention
Fig. 1 is to simplify circuit structure diagram using the current-mode step-up DC-DC of traditional soft start；
Fig. 2 is segmentation soft start circuit structure figure of the invention；
Fig. 3 is the precharge unit circuit diagram in the present invention；
Fig. 4 is the logic control element circuit diagram in the present invention；
Fig. 5 is the current-mode step-up DC-DC simplified structure diagram using present invention segmentation soft start.
Specific embodiment
A specific embodiment of the invention is further described referring to Figure of description.
Reference Fig. 2, soft starting circuit provided by the invention, including：Soft-start module 1, error amplifier 2, pulsewidth modulation
Comparator 3, logical drive module 4, precharge unit 5 export monitoring unit 6 and logic control element 7, wherein：
Soft-start module 1 is exported for generating the voltage of linear rise to error amplifier 2；
Error amplifier 2 is equipped with two-way and inputs, connect all the way with soft-start module 1, and another way and feedback voltage FB connect
It connects, the voltage of the linear rise generated in soft-start module 1 is compared with feedback voltage FB, adjusts its output voltage；
Pulse width modulated comparator 3, input are connected to error amplifier 2, and output is connected to logical drive module 4, will accidentally
Poor 2 output voltage of amplifier adjusts its output compared with its internal slope generation voltage, is controlled by logical drive module 4
Main switch and synchronous switch pipe in DC-DC circuit processed are opened and break；
Logical drive module 4, is equipped with two-way input and two-way output, and input terminal is respectively connected to pulse width modulated comparator
3 output end and the output end of precharge unit 5；
Precharge unit 5, input terminal are connected to the grid of the synchronous switch pipe in DC-DC circuit, make synchronous switch pipe
Grid voltage PG slowly discharged by precharge unit 5, export precharge cut-off signals to logical drive module 4, is patrolled with controlling
Collect the normal work of drive module 4；
Monitoring unit 6 is exported, two-way is equipped with and inputs, reference voltage VREF and feedback voltage FB are respectively connected to, by base
Quasi- voltage VREF compares with feedback voltage FB, and output soft start enable signal EN_SOFT is controlled soft by logic control element 7
Starting module 1 is opened and breaks；
Logic control element 7, input terminal are connected to the output end of output monitoring unit 6, and output is connected to soft start
The output end of module, whether the output soft-start signal for controlling soft-start module 1 rises.
Referring to Fig. 3, precharge unit 5 of the present invention includes current source I3, two NMOS tubes MN31, MN32, filtering
Resistance R31, filter capacitor C31, Schmidt trigger S3 and latch T3, wherein：
The input terminal of current source I3 is connected to supply voltage VCC, and output end is connected to the drain electrode of the first NMOS tube MN31, makees
For mirror current source；
The grid of first NMOS tube MN31 is connected with drain electrode, while being connected to the grid of the second NMOS tube MN32, is used for
Current mirror is constituted, source electrode is connected with the source electrode of the second NMOS tube MN32 and is connected to ground；
The drain electrode of second NMOS tube MN32 is connected to the grid voltage PG of synchronous switch pipe in DC-DC circuit, makes grid voltage PG
It is discharged by the second NMOS tube MN32, to make grid voltage PG slowly discharge, the first NMOS tube MN31 and the second NMOS tube is set
The ratio between the number of MN32, that is, m value is n:1；
An end of filter resistance R31 is connected to the grid voltage PG of synchronous switch pipe, one end of the other end and filter capacitor C31
Connection constitutes RC filter, and the other end of filter capacitor C31 is connected to the source electrode of the second NMOS tube MN32, for synchronizing out
The grid voltage PG for closing pipe is filtered；
The input terminal of Schmidt trigger S3 is connected to the common end of filter capacitor C31 Yu filter resistance R31, and the port is defeated
Signal is signal of the grid voltage PG of synchronous switch pipe after RC filtering out, and the output end of Schmidt trigger S3 connects
It is connected to the input terminal of latch T3, the output end output precharge cut-off signals Pre_shut of latch T3.For control logic
The normal work of drive module 4.The threshold value of Schmidt trigger S3 is lower, about 0.4V, i.e., when synchronizing out in DC-DC circuit
The grid voltage PG for closing pipe slowly discharges since supply voltage VCC, and when being reduced to 0.4V, Schmidt trigger S3 overturning is high electricity
Flat, the precharge cut-off signals Pre_shut signal exported after latch T3 for height and is latched as height by low overturning, controls
Logical drive module 4 starts to work normally.
Referring to Fig. 4, logic control element 7 of the present invention, including a phase inverter INV4 and a NMOS switch pipe
The input of MN4, phase inverter INV4 are connected to the output signal soft start enable signal EN_SOFT of output monitoring unit 6, output
It is connected to the grid of NMOS switch pipe MN4；The source electrode of switching tube MN4 is grounded, the output signal in drain electrode connection soft-start module 1
SS.When inputting soft start enable signal EN_SOFT is low level, switching tube MN4 conducting draws SS signal for ground.Work as input
When soft start enable signal EN_SOFT overturning is high level, SS signal is decontroled in switching tube MN4 cut-off.
Referring to Fig. 5, connection relationship and course of work principle of the present invention in current-mode booster type DC-DC circuit are as follows：
Current-mode booster type DC-DC circuit mainly includes：Inductance L11, main switch MN11, synchronous switch pipe MP11 are defeated
Capacitor C outOUT1, output capacitance equivalent resistance ESR1, two divider resistances R11, R12, load resistance RLOAD1；
One end of inductance L11 is connected to power supply VCC, and the other end is connected to drain electrode and the synchronous switch pipe of main switch MN11
The source electrode of MP11；
The grid of main switch MN11 is connected to the output end of logical drive module 4, in the control of logical drive module 4
Under, keep opening and breaking for its, source electrode ground connection；
The grid of synchronous switch pipe MP11 is connected to the input terminal of logical drive module 4 and precharge unit 5, is used for grid voltage
The electric discharge of PG, drain electrode are connected to one end of resistance ESR1, and drain voltage is output voltage VO UT；
One end equivalent resistance ESR1 of output capacitance connects VOUT, and the other end connects one end of output capacitance Cout2；Output
The other end of capacitor is grounded；
It is connected between VOUT and ground after feedback resistance R11 and R12 series connection, the voltage value at the both ends feedback resistance R12 is
Feedback voltage FB；
Resistance RLOAD1 is connected between VOUT and ground as load resistance；
Feedback voltage FB is connected respectively to the positive input and error amplifier 2 of amplifier in output monitoring unit 6
Reverse input end.
After chip electrifying startup, the grid voltage PG's of the grid voltage NG and synchronous switch pipe MP11 of main switch MN11
Original state is respectively low level and high level, therefore main switch MN11 and synchronous switch pipe MP11 are not turned on.Output monitoring
The feedback voltage FB of DC-DC circuit output voltage is compared by unit 6 with reference level VREF, feedback voltage when electrifying startup
FB and DC-DC circuit output voltage VO UT is begun to ramp up from 0, thus export monitoring unit 6 output signal EN_SOFT be it is low,
Soft-start signal SS is drawn to low level by logic control element 7.Since precharge cut-off signals Pre_shut signal is initial
Grid voltage NG for low level, 4 cisco unity malfunction of control logic drive module, main switch MN11 remains low level.
The grid voltage PG of synchronous switch pipe MP11 is discharged by precharge unit 5.
The size of first NMOS tube MN31 and the second NMOS tube MN32 are identical in precharge unit 5, by mirroring ratios
It can obtain, the source-drain current for flowing through the second NMOS tube MN32 is 1/nI3, and the grid voltage PG of synchronous switch pipe MP11 passes through second
NMOS tube MN32 slowly discharges, and PG voltage gradually decreases, therefore the conducting resistance of synchronous switch pipe MP11 is gradually reduced, supply voltage
It is output capacitance C by inductance L11 and synchronous switch pipe MP11OUT1 charging.The PG voltage gradually decreased pass through by resistance R31 and
It is output to Schmidt trigger S3 after the RC filtering of capacitor C31 composition, when PG voltage drops to the overturning of Schmidt trigger S3
When threshold value, that is, 0.4V, Schmidt trigger S3 overturns and is input to latch T3, and the output of latch T3 is pre-charged cut-off signals
Pre_shut is high level by low overturning, and is latched as high level, until chip re-powers and reverts to original state low level.
The output voltage in DC-DC circuit has been approached its input voltage, the output signal EN_SOFT overturning of output monitoring unit 6 at this time
For high level, soft-start signal SS is decontroled.
The overturning of Pre_shut signal is height, and control logic drive module 4 starts to work normally.Logical drive module 4 exports
Clock signal control main switch MN11 be both turned within each period, supply voltage VCC by main switch MN11 to L11
It charges.The soft start voltage signal SS of linear rise is input to the positive input of error amplifier EA, instead of benchmark electricity
Pressure VREF is compared with feedback voltage FB, output error signal VEA.Pulse width modulated comparator by error signal VEA be superimposed
Level VS is compared, and the signal of output turns off main switch MN11 by logical drive module 4.It is turned off in main switch MN11
Afterwards, carry out afterflow will be connected in synchronous switch pipe MP11, give output capacitance COUT1 charging, until next clock cycle arrives
Come.
With soft-start signal SS linear rise, the current peak of inductance L11 is steadily improved, when soft-start signal SS voltage
When more than reference voltage VREF, error amplifier EA is switched to reference voltage and is compared with superposition level VS, to output voltage
VOUT is fine-tuned, and output voltage has been approached setting value at this time, therefore inductive current realizes steadily excessively, avoids wave
The generation of electric current is gushed, start-up course is completed.
Claims (3)
1. a kind of segmentation soft starting circuit suitable for step-up DC-DC, including：Soft-start module (1), error amplifier (2),
Pulse width modulated comparator (3) and logical drive module (4)；Error amplifier (2) equipped with two-way input, all the way with soft-start module
(1) it connects, another way is connect with feedback voltage FB, and the output end of error amplifier (2) passes through pulse width modulated comparator (3) and patrols
Drive module (4) are collected to be connected, which is characterized in that
Precharge unit (5) are had additional between the input terminal and output end of logical drive module (4), for controlling DC-DC circuit
Synchronous switch pipe grid voltage PG gradually decrease, while export precharge cut-off signals pre_shut control logic drive module (4)
Normal work；
The output end of soft-start module (1) has additional output monitoring unit (6) and logic control element (7), and output monitoring is single
First (6), export soft start enable signal EN_SOFT and give logic control element (7), control soft open by logic control element (7)
Dynamic model block (1) is opened and breaks；
The precharge unit (5), including current source I3, two NMOS tubes MN31, MN32, filter resistance R31, filter capacitor
C31, Schmidt trigger S3 and latch T3, wherein：
The input terminal of current source I3 is connected to supply voltage VCC, and output end is connected to the drain electrode of the first NMOS tube MN31, as mirror
Image current source；
The grid of first NMOS tube MN31 is connected with drain electrode, while being connected to the grid of the second NMOS tube MN32, for constituting
Current mirror, source electrode are connected with the source electrode of the second NMOS tube MN32 and are connected to ground；
The drain electrode of second NMOS tube MN32 is connected to the grid voltage PG of synchronous switch pipe in DC-DC circuit；
An end of filter resistance R31 is connected to the grid voltage PG of synchronous switch pipe, one end company of the other end and filter capacitor C31
It connects, constitutes RC filter, the other end of filter capacitor C31 is connected to the source electrode of the second NMOS tube MN32, for synchronous switch
The grid voltage PG of pipe is filtered；
The input terminal of Schmidt trigger S3 is connected to the common end of filter capacitor C31 Yu filter resistance R31, the common end output
Signal is signal of the grid voltage PG of synchronous switch pipe after RC filtering, the output end connection of Schmidt trigger S3
To the input terminal of latch T3, the output end output precharge cut-off signals Pre_shut of latch T3.
2. circuit according to claim 1, it is characterised in that：The output monitoring unit (6) is by an operational amplifier
Composition, the operational amplifier positive input connect feedback voltage FB, and reverse input end connects reference level VREF, which puts
The output end of big device is connect with logic control element (7), and the soft start enable signal EN_SOFT of output passes through logic control list
First (7) control soft-start module (1) opens and breaks.
3. circuit according to claim 1, it is characterised in that：The logic control element (7), including a phase inverter
INV4 and NMOS switch pipe MN4, the input of phase inverter INV4 are connected to the output end of output monitoring unit (6), output
It is connected to the grid of NMOS switch pipe MN4；Output signal in drain electrode connection soft-start module (1) of switching tube MN4, source electrode connect
Ground.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611093638.XA CN106505847B (en) | 2016-12-02 | 2016-12-02 | Segmentation soft starting circuit suitable for step-up DC-DC |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611093638.XA CN106505847B (en) | 2016-12-02 | 2016-12-02 | Segmentation soft starting circuit suitable for step-up DC-DC |
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| CN106505847A CN106505847A (en) | 2017-03-15 |
| CN106505847B true CN106505847B (en) | 2018-11-16 |
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Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
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| TWI692922B (en) * | 2018-05-21 | 2020-05-01 | 瑞鼎科技股份有限公司 | Soft-start control circuit applied to dc-dc converting system |
| CN109120144B (en) * | 2018-08-29 | 2020-03-31 | 电子科技大学 | Soft start control method of DC-DC converter |
| CN110234188A (en) * | 2019-05-08 | 2019-09-13 | 深圳市富满电子集团股份有限公司 | The self shifter of LED drive chip adjusts circuit |
| CN110289754B (en) * | 2019-07-02 | 2020-09-04 | 温州大学 | Quick start control method and system for Buck circuit |
| CN114460992A (en) * | 2020-11-09 | 2022-05-10 | 扬智科技股份有限公司 | Voltage regulator |
| CN113904309B (en) * | 2021-10-15 | 2022-08-12 | 无锡力芯微电子股份有限公司 | Soft start circuit capable of suppressing surge current and overshoot voltage |
| CN114326911B (en) * | 2022-01-04 | 2023-09-26 | 长江存储科技有限责任公司 | Reference voltage circuit and three-dimensional memory |
| CN114679055B (en) * | 2022-01-14 | 2023-05-23 | 荣耀终端有限公司 | Switching power supply circuit and terminal equipment |
| CN114499148B (en) * | 2022-03-28 | 2022-07-12 | 南京融芯微电子有限公司 | Boost type direct current converter starting control method and device and switching power supply |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| TWI369057B (en) * | 2009-03-13 | 2012-07-21 | Advanced Analog Technology Inc | Boost converter having two-step soft start mechanism |
| CN102983734B (en) * | 2012-12-20 | 2015-04-08 | 西安电子科技大学 | Soft starting circuit applied to voltage boosting DC-DC switch power supply |
| KR20150100235A (en) * | 2014-02-25 | 2015-09-02 | 주식회사 실리콘웍스 | Soft-start circuit and dc-dc convertor having the same |
| CN103904875A (en) * | 2014-03-24 | 2014-07-02 | 合肥工业大学 | Digital soft start circuit in switching power source |
| CN205004952U (en) * | 2015-09-25 | 2016-01-27 | 深圳微步信息股份有限公司 | Direct current soft start circuit |
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