CN105763036B - The fast start circuit of power chip and the measuring instrument made of the circuit - Google Patents
The fast start circuit of power chip and the measuring instrument made of the circuit Download PDFInfo
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- CN105763036B CN105763036B CN201610316867.7A CN201610316867A CN105763036B CN 105763036 B CN105763036 B CN 105763036B CN 201610316867 A CN201610316867 A CN 201610316867A CN 105763036 B CN105763036 B CN 105763036B
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- power
- divider resistance
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- 238000004804 winding Methods 0.000 claims description 13
- 230000005611 electricity Effects 0.000 claims description 7
- 239000004065 semiconductor Substances 0.000 claims description 6
- 230000000630 rising effect Effects 0.000 claims description 5
- 238000010586 diagram Methods 0.000 description 6
- 238000007600 charging Methods 0.000 description 2
- 210000000080 chela (arthropods) Anatomy 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000003111 delayed effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000037452 priming Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
-
- 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
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Dc-Dc Converters (AREA)
- Power Sources (AREA)
Abstract
The invention discloses a kind of fast start circuit of power chip, including starting switch pipe, electrification reset circuit, flip-flop circuit and clamp circuit with delay；The power pins signal of power chip passes through electrification reset circuit, the flip-flop circuit with delay and clamp circuit output clamp voltage signal, clamp voltage signal is connected by starting resistance with the high voltage bus after rectification, it is also connected with the control terminal of starting switch pipe, one end of starting switch pipe movable end is connected with high voltage bus, the power pins connection of the other end and power chip；The invention also discloses measuring instrument made of the fast start circuit of the application power chip.The present invention can ensure the quick startup of power chip, and circuit is simple and reliable, and power consumption is extremely low；Using the measuring instrument of the present invention, it can equally ensure that the power chip in measuring instrument quickly starts, and power consumption is relatively low.
Description
Technical field
A kind of fast start circuit present invention relates particularly to power chip and the measuring instrument made of the circuit.
Background technology
With the development and the improvement of people's living standards of China's economic technology, Power Electronic Technique has been widely used for
In the production and life of people.Power chip is not sayed as part indispensable in power electronics field, its importance
And explain.
The power chip of existing supply convertor or other power electronic products, chip be required for before normal work by
High voltage bus after rectification is powered by power pins of the resistance to chip, and after power pins reach operating voltage, chip is
It can work normally, outlet side establishes voltage at this time, then gives power pins to power by auxiliary winding, so starting the time by starting electricity
Hinder with the pin capacitance of power pins to together decide on.It is the power chip power supply circuit of a certain AC-DC converter as shown in Figure 1
Schematic diagram：It can be seen that before chip normal work, the high voltage bus after rectification is by starting VDD power supplys of the resistance Rst to chip
Pin powered, while the start-up capacitance charging of power pins, power pins VDD reach operating voltage, power chip starts at this time
Work, control DRV pin work, so that just start to establish voltage in outlet side, then by passing through diode and current limliting for electric winding
Resistance is powered；After chip operation, VDD supply voltages will provide energy source by transformer-supplied winding, we need at this time
Want sufficiently large startup resistance and start the quiescent dissipation of resistance band to minimize.In addition, in power pins VDD for the first time
When reaching chip startup voltage, chip will start to work, but transformer auxiliary winding can't provide enough energy at this time
The current drain of chip is maintained, this just needs start-up capacitance Cvdd to maintain vdd voltage using big capacitance, makes power pins electric
Pressure is not less than the shut-off voltage of chip, and otherwise chip will repeated priming and operation irregularity.Therefore, power chip actually opens
It is dynamic to be determined by startup resistance Rst and start-up capacitance Cvdd；And the start-up course of chip then directly requires to start resistance Rst and startup
Capacitance Cvdd takes larger value；But the startup time that larger resistance and capacitance can directly result in power chip is slack-off.
The content of the invention
It is an object of the present invention to provide a kind of the quick of power chip that can ensure power chip and quickly start
Start-up circuit.
The second object of the present invention is to provide metering made of a kind of fast start circuit using the power chip
Instrument.
The fast start circuit of this power chip provided by the invention, including start resistance, start-up capacitance, two poles of power supply
Pipe and current-limiting resistance, further include starting switch pipe, electrification reset circuit, flip-flop circuit and clamp circuit with delay；Transformation
Device is connected for electric winding by series connection for the power pins of electric diode and current-limiting resistance and power chip, and start-up capacitance connects
It is connected between the power pins of power chip and ground, the power pins signal of power chip is delayed by electrification reset circuit, band
Flip-flop circuit and clamp circuit output clamp voltage signal, clamp voltage signal pass through the high pressure after starting resistance and rectification
Busbar connects, and clamp voltage signal is also connected with the control terminal of starting switch pipe, behind one end of starting switch pipe movable end and rectification
High voltage bus connection, the power pins of the other end and power chip connect；Clamp circuit is used for fast when power chip powers on
Speed control starting switch pipe conducting, to improve the charge rate of start-up capacitance, ensures power chip fast powering-up；Electrification reset electricity
Road is used for after power chip fast powering-up, and drive signal is persistently provided to clamp circuit by the flip-flop circuit with delay,
Ensure that clamp circuit persistently exports clamp signal when the confession electric winding of transformer cannot independently power to power chip, ensure core
The power supply supply of piece, and stop carrying to clamp circuit when the confession electric winding of transformer can be independently independently-powered to power chip
For drive signal, to reduce circuit power consumption.
The starting switch pipe is N-type metal-oxide-semiconductor.
The trigger of the band delay carries the rest-set flip-flop of rising edge delay circuit for R input.
The electrification reset circuit includes first comparator, the second comparator, the first divider resistance, the second divider resistance
With the 3rd divider resistance；The power pins of power chip pass through the first divider resistance of series connection, the second divider resistance and the 3rd point
Piezoresistance is connected to ground, and the input anode of first comparator and the input cathode of the second comparator are all connected with the second datum；
The input cathode of first comparator is connected to the 3rd divider resistance between the second divider resistance, the input anode of the second comparator
It is connected between the first divider resistance and the second divider resistance.
Second datum is 2V.
The clamp circuit includes clamp switch pipe, operational amplifier, the first clamp divider resistance, the second clamp partial pressure
Resistance, the 3rd clamp divider resistance and clamp controlling switch pipe；First clamp divider resistance, the second clamp divider resistance and the 3rd
Clamp divider resistance be serially connected in clamp circuit export signal between；The output signal of flip-flop circuit with delay connects pincers
The control terminal of position controlling switch pipe, one end of clamp controlling switch pipe movable end are connected to ground, and the other end is connected to the 3rd clamp
Between divider resistance and the second clamp divider resistance；The in-phase input end of operational amplifier be connected to the first clamp divider resistance and
Between second clamp divider resistance；The inverting input of operational amplifier connects the first datum；The output of operational amplifier
The control terminal of end connection clamp switch pipe, one end of clamp switch pipe movable end are connected to ground, and other end connection clamp circuit is defeated
Go out signal.
First datum is 6V.
The clamp switch pipe is N-type metal-oxide-semiconductor.
The clamp controlling switch pipe is N-type metal-oxide-semiconductor.
Present invention also offers a kind of measuring instrument, the measuring instrument applies the fast start circuit of the power chip
It is made.
The fast start circuit of this power chip provided by the invention, it is quick by clamp circuit at the power supply electrifying moment
Switching tube is on and to start-up capacitance quick charge, so as to ensure power chip power pins in transformer-supplied coil just
Often work before can fast powering-up, power chip fast powering-up and transformer-supplied coil normal work before pass through electrification reset
Circuit and delay circuit ensure persistently powering on for power chip, and pass through electrification reset after transformer-supplied coil normal work
Circuit turns off the output signal of clamp circuit, so as to reduce the power consumption of circuit；Therefore this power chip provided by the invention
Fast start circuit can ensure the quick startup of power chip, and circuit is simple and reliable, and power consumption is extremely low.Carried using the present invention
Measuring instrument made of the fast start circuit of the power chip of confession, can equally ensure that the power chip in measuring instrument is quick
Start, and power consumption is relatively low.
Brief description of the drawings
Fig. 1 is the power chip power supply circuit schematic diagram of background of invention.
Fig. 2 is the functional block diagram of the fast start circuit of the power chip of the present invention.
Fig. 3 is the circuit diagram of the specific embodiment of the fast start circuit of the power chip of the present invention.
Fig. 4 is the working waveform figure of the specific embodiment of the fast start circuit of the power chip of the present invention.
Embodiment
It is illustrated in figure 2 the functional block diagram of the fast start circuit of the power chip of the present invention：The power supply of transformer around
Group is connected by connecting for the power pins of electric diode and current-limiting resistance and power chip (VDD is indicated in figure), starts electricity
Hold (indicating Cvdd in figure) to be connected between the power pins of power chip and ground, the power pins signal of power chip passes through upper
Reset circuit, the flip-flop circuit with delay and clamp circuit output clamp voltage signal (STG is indicated in figure), clamp voltage
Signal is connected by starting resistance (Rst is indicated in figure) with the high voltage bus after rectification, and clamp voltage signal is also connected with startup and opens
The control terminal of pipe (Mst is indicated in figure) is closed, the high voltage bus connection behind one end of starting switch pipe movable end and rectification, the other end
It is connected with the power pins of power chip；Clamp circuit is used to quickly control starting switch pipe to turn on when power chip powers on,
To improve the charge rate of start-up capacitance, ensure power chip fast powering-up；Electrification reset circuit is used for quick in power chip
After the power is turned on, drive signal is persistently provided to clamp circuit by the flip-flop circuit with delay, ensures clamp circuit in transformer
Confession electric winding persistently export clamp signal when cannot independently power to power chip, ensure the power supply supply of chip, and becoming
The confession electric winding of depressor stops providing drive signal to clamp circuit when can independently power to power chip, to reduce circuit work(
Consumption.
It is illustrated in figure 3 the circuit diagram of the specific embodiment of the fast start circuit of the power chip of the present invention：On
Reset circuit includes first comparator (Comp1 is indicated in figure), the second comparator (Comp2 is indicated in figure), the first partial pressure electricity
Hinder (R4 is indicated in figure), the second divider resistance (R5 is indicated in figure) and the 3rd divider resistance (R6 is indicated in figure)；Power chip
Power pins (VDD is indicated in figure) are connected by the first divider resistance, the second divider resistance and the 3rd divider resistance of series connection with ground
Connect, the input anode of first comparator and the input cathode of the second comparator are all connected with the second datum, are specially 2V；First
The input cathode of comparator is connected to the 3rd divider resistance between the second divider resistance, the input anode connection of the second comparator
Between the first divider resistance and the second divider resistance.
Trigger with delay carries the rest-set flip-flop of rising edge delay circuit for R input.
Clamp circuit includes clamp switch pipe (M1 is indicated in figure), operational amplifier (OP1 is indicated in figure), the first clamp point
Piezoresistance (R1 is indicated in figure), the second clamp divider resistance (indicate) R2, the 3rd clamp divider resistance (R3 is indicated in figure) in figure
With clamp controlling switch pipe (M2 is indicated in figure)；First clamp divider resistance, the second clamp divider resistance and the 3rd clamp partial pressure
Resistance be serially connected in clamp circuit export signal between；The output signal connection clamp control of flip-flop circuit with delay is opened
The control terminal of pipe is closed, one end of clamp controlling switch pipe movable end is connected to ground, and the other end is connected to the 3rd clamp divider resistance
Between the second clamp divider resistance；The in-phase input end of operational amplifier is connected to the first clamp divider resistance and the second clamp
Between divider resistance；The inverting input of operational amplifier connects the first datum, is specially 6V；The output of operational amplifier
The control terminal of end connection clamp switch pipe, one end of clamp switch pipe movable end are connected to ground, and other end connection clamp circuit is defeated
Go out signal.
In specific works, after power supply electrifying, the voltage of STG will be pulled up by starting resistance Rst, on the voltage of STG
After the threshold voltage for rising above starting switch pipe Mst, starting switch pipe Mst conductings, charge to start-up capacitance Cvdd, due to
The equivalent resistance of starting switch pipe Mst is very low, therefore will be bright to chip start-up capacitance Cvdd chargings using starting switch pipe Mst
Raising of showing off one's talent or competence starts speed.Since chip power vdd voltage is less than at this timeWith
So VDD_ON signal levels are low at this time, VDD_OFF signal levels are height, and CLP_HI signal levels are height.
When STG signal voltages rise and reach STG_CLP_H, STG voltages, which will be clamped, no longer to be risen, and starts open at this time
Pipe Mst is closed to continue to charge to start-up capacitance Cvdd, whenWhen, VDD_OFF level signals are become by height
It is low, but VDD_ON level signals are still low, so CLP_HI will stay in that height is constant.
WhenWhen, VDD_ON level signals are become higher by low, and chip is started to work, but due to
Chip is just started to work at this time, and the auxiliary winding of transformer can't independently give the power vd D of power chip to provide energy
Amount, but due to there is the presence of rising edge delay circuit, ON_DLY signals will just be changed into high after delay time, herein
In delay time, starting switch pipe Mst provides the power pins VDD continued to power chip to energy, and avoiding problems herein
Stage needs the problem of very big start-up capacitance Cvdd is to maintain vdd voltage, so as to ensure to show using small Cvdd capacitances
Write ground and improve the circuit start time.
After after delay time, ON_DLY signals become higher, and the output of rest-set flip-flop becomes higher, and CLP_HI is lower, the pincers of STG
Position voltage will be reduced to STG_CLP_L voltages, and starting switch pipe Mst will be changed into cut-off state, and the VDD energy of chip will have completely
Transformer compole provides, and whole start-up course terminates.In whole start-up course, the work wave of each key point of start-up circuit
Figure is as shown in Figure 4.
Claims (10)
1. a kind of fast start circuit of power chip, including start resistance, start-up capacitance, for electric diode and current-limiting resistance,
Characterized by further comprising starting switch pipe, electrification reset circuit, flip-flop circuit and clamp circuit with delay；Transformer
Connected for electric winding by series connection for the power pins of electric diode and current-limiting resistance and power chip, start-up capacitance is connected to
Between the power pins and ground of power chip, the power pins signal of power chip passes through electrification reset circuit, touching with delay
Device circuit and clamp circuit output clamp voltage signal are sent out, clamp voltage signal is by starting resistance and the high voltage bus after rectification
Connection, clamp voltage signal are also connected with the control terminal of starting switch pipe, the height behind one end of starting switch pipe movable end and rectification
Press busbar connection, the power pins connection of the other end and power chip；Clamp circuit is used to quickly control when power chip powers on
Starting switch pipe conducting processed, to improve the charge rate of start-up capacitance, ensures power chip fast powering-up；Electrification reset circuit is used
In after power chip fast powering-up, drive signal is persistently provided to clamp circuit by the flip-flop circuit with delay, is ensured
Clamp circuit persistently exports clamp signal when the confession electric winding of transformer cannot independently power to power chip, ensures chip
Power supply is supplied, and stops when confession the electric winding of transformer can be independently independently-powered to power chip giving clamp circuit offer drive
Dynamic signal, to reduce circuit power consumption.
2. the fast start circuit of power chip according to claim 1, it is characterised in that the starting switch pipe is N
Type metal-oxide-semiconductor.
3. the fast start circuit of power chip according to claim 1, it is characterised in that the triggering of the band delay
Device carries the rest-set flip-flop of rising edge delay circuit for R input.
4. the fast start circuit of the power chip according to one of claim 1 ~ 3, it is characterised in that replied by cable on described
Position circuit includes first comparator, the second comparator, the first divider resistance, the second divider resistance and the 3rd divider resistance；Power
The power pins of chip are connected to ground by the first divider resistance, the second divider resistance and the 3rd divider resistance of series connection, and first
The input anode of comparator and the input cathode of the second comparator are all connected with the second datum；The input cathode of first comparator
The 3rd divider resistance is connected between the second divider resistance, the input anode of the second comparator be connected to the first divider resistance and
Between second divider resistance.
5. the fast start circuit of power chip according to claim 4, it is characterised in that second datum
For 2V.
6. the fast start circuit of the power chip according to one of claim 1 ~ 3, it is characterised in that the clamp electricity
Road includes clamp switch pipe, operational amplifier, the first clamp divider resistance, the second clamp divider resistance, the 3rd clamp partial pressure electricity
Resistance and clamp controlling switch pipe；First clamp divider resistance, the second clamp divider resistance and the 3rd clamp divider resistance are serially connected in
Between ground and clamp circuit output signal；The control of the output signal connection clamp controlling switch pipe of flip-flop circuit with delay
End, one end of clamp controlling switch pipe movable end are connected to ground, and the other end is connected to the 3rd clamp divider resistance and the second clamp
Between divider resistance；The in-phase input end of operational amplifier be connected to the first clamp divider resistance and second clamp divider resistance it
Between；The inverting input of operational amplifier connects the first datum；The output terminal connection clamp switch pipe of operational amplifier
Control terminal, one end of clamp switch pipe movable end are connected to ground, other end connection clamp circuit output signal.
7. the fast start circuit of power chip according to claim 6, it is characterised in that first datum
For 6V.
8. the fast start circuit of power chip according to claim 6, it is characterised in that the clamp switch pipe is N
Type metal-oxide-semiconductor.
9. the fast start circuit of power chip according to claim 6, it is characterised in that the clamp controlling switch
Manage as N-type metal-oxide-semiconductor.
A kind of 10. measuring instrument, it is characterised in that the quick startup electricity including the power chip described in one of claim 1 ~ 9
Road, and the power chip of measuring instrument is quickly started using the fast start circuit of the power chip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610316867.7A CN105763036B (en) | 2016-05-13 | 2016-05-13 | The fast start circuit of power chip and the measuring instrument made of the circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610316867.7A CN105763036B (en) | 2016-05-13 | 2016-05-13 | The fast start circuit of power chip and the measuring instrument made of the circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105763036A CN105763036A (en) | 2016-07-13 |
| CN105763036B true CN105763036B (en) | 2018-04-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610316867.7A Active CN105763036B (en) | 2016-05-13 | 2016-05-13 | The fast start circuit of power chip and the measuring instrument made of the circuit |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109103864B (en) * | 2018-09-13 | 2019-09-13 | 广州烽火众智数字技术有限公司 | A kind of compact sedan flow statistical equipment booting delay and protection circuit |
| CN111478605B (en) * | 2020-04-15 | 2021-07-06 | 深圳市稳先微电子有限公司 | Synchronous rectification control chip and AC-DC system |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102097927B (en) * | 2011-01-18 | 2013-11-27 | Bcd半导体制造有限公司 | Starting circuit of switch power supply chip and starting method of starting circuit |
| CN202364112U (en) * | 2011-11-20 | 2012-08-01 | 合肥华耀电子工业有限公司 | Starting circuit of control chip of switching-mode power supply |
| US9019726B2 (en) * | 2012-07-13 | 2015-04-28 | Flextronics Ap, Llc | Power converters with quasi-zero power consumption |
| US9461534B2 (en) * | 2012-08-21 | 2016-10-04 | Stmicroelectronics S.R.L. | Wirelessly activated power supply for an electronic device |
| CN103887960A (en) * | 2014-04-21 | 2014-06-25 | 美芯晟科技（北京）有限公司 | Quick starting control circuit of convertor |
| CN205610475U (en) * | 2016-05-13 | 2016-09-28 | 威胜集团有限公司 | Quick starting circuit of power chip and metering device who makes with this circuit |
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2016
- 2016-05-13 CN CN201610316867.7A patent/CN105763036B/en active Active
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Effective date of registration: 20161116 Address after: 410003, Changsha, Yuelu District, silver basin Ling Ling Street, No. 359 South Road, No., No. two, 1-5 Applicant after: HUNAN SHENG AND ELECTRONIC TECHNOLOGY Co.,Ltd. Address before: 410205 Tongzi, Changsha, Changsha hi tech Development Zone, west slope road, No. 468, Applicant before: WASION Group Ltd. |
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Address after: The two phase of the project wasion Technology Park No. 468 Tongzi high tech Development Zone, Hunan province Changsha road 410205 No. 11 building 101 floor No. 1-8 Applicant after: HUNAN SEEHRE POWER TECHNOLOGY CO.,LTD. Address before: 410003, Changsha, Yuelu District, silver basin Ling Ling Street, No. 359 South Road, No., No. two, 1-5 Applicant before: HUNAN SHENG AND ELECTRONIC TECHNOLOGY Co.,Ltd. |
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| CB02 | Change of applicant information |
Address after: The two phase of the project wasion Technology Park No. 468 Tongzi high tech Development Zone in Hunan province Changsha slope 410205 West Road No. 11 building 101 floor No. 1-8 Applicant after: HUNAN SEEHRE POWER TECHNOLOGY CO.,LTD. Address before: The two phase of the project wasion Technology Park No. 468 Tongzi high tech Development Zone, Hunan province Changsha road 410205 No. 11 building 101 floor No. 1-8 Applicant before: HUNAN SEEHRE POWER TECHNOLOGY CO.,LTD. |
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Effective date of registration: 20231101 Address after: Room 101, 3rd Floor, Building 11, Phase II of Weisheng Science and Technology Park, No. 468 Tongzipo West Road, High tech Development Zone, Changsha City, Hunan Province, 410205 Patentee after: Hunan Shenghe Intelligent Control Technology Co.,Ltd. Address before: 410205 no.1-8, 3rd floor, 101, No.11 plant, phase II project, Weisheng Science Park, no.468, tongzipo West Road, high tech Development Zone, Changsha City, Hunan Province Patentee before: HUNAN SEEHRE POWER TECHNOLOGY CO.,LTD. |
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