CN207184308U - A kind of power supply control chip power supply circuit - Google Patents
A kind of power supply control chip power supply circuit Download PDFInfo
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- CN207184308U CN207184308U CN201720275575.3U CN201720275575U CN207184308U CN 207184308 U CN207184308 U CN 207184308U CN 201720275575 U CN201720275575 U CN 201720275575U CN 207184308 U CN207184308 U CN 207184308U
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Abstract
The utility model discloses a kind of power supply control chip power supply circuit, startup power supply module including connecting input power VIN, connect the power supply handover module and auxiliary power module of startup power supply module, power supply handover module is connected with auxiliary power module, and the output end of auxiliary power module is used to connect electrical equipment；Startup power supply module includes being sequentially connected to input power VIN first switch pipe Q1 and the first electric capacity C1；Power supply handover module includes the first delay circuit and first switch circuit.The utility model has the characteristics that quick startup, the technology circuit of stable operation, solves existing chip and starts the problems such as circuit power consumption after spread of voltage, stable operation is excessive.
Description
Technical field
The utility model belongs to Switching Power Supply application field, and in particular to a kind of power supply control chip power supply circuit.
Background technology
Switch power technology extensive use in frequency conversion equipment, and power supply control chip is the core of Switching Power Supply,
Stable operation of the normal work of chip to frequency conversion equipment is most important.As the operating mode that frequency control is applied is more complicated, people
Startup to power supply control chip requires higher, and such as startup is fast, loss is low, and more crucially chip start-up course will be stablized,
So that frequency conversion equipment can normally start and stable operation.
The content of the invention：
The problem of the utility model will exist for above-mentioned background technology, there is provided a kind of power supply control chip power supply circuit,
Use extensive, stability height.
In order to solve the above technical problems, the technical solution of the utility model is：
A kind of power supply control chip power supply circuit, includes connection input power VIN startup power supply module, and connection starts electricity
The power supply handover module and auxiliary power module of source module, power supply handover module are connected with auxiliary power module, accessory power supply mould
The output end of block is used to connect electrical equipment；Startup power supply module includes being sequentially connected to input power VIN first switch pipe
Q1 and the first electric capacity C1；Power supply handover module includes the first delay circuit and first switch circuit.
It is preferred that first switch pipe Q1 drain electrode passes through resistance R1 connection input power VIN, first switch pipe Q1 grid
It is connected by resistance R2 with first switch pipe Q1 drain electrode, first switch pipe Q1 source electrode connects the first electric capacity C1 one end, the
One electric capacity C1 other end ground connection, the first electric capacity C1 earth terminal also pass through voltage-stabiliser tube ZD1 connection first switch pipes Q1 grid
Pole.
It is preferred that voltage-stabiliser tube ZD1 negative electrode connection first switch pipe Q1 grid, voltage-stabiliser tube ZD1 anode connection first
Electric capacity C1 earth terminal.
It is preferred that the first delay circuit includes the 3rd diode D3,3rd resistor R3 and the 3rd electric capacity C3, the 3rd diode
D3 negative pole connection auxiliary power module, the 3rd diode D3 positive pole connection 3rd resistor R3 one end, 3rd resistor R3's
The other end is grounded by the 3rd electric capacity C3, and the electric capacity C3 of 3rd resistor R3 connections the 3rd one end connects first switch circuit simultaneously.
It is preferred that first switch circuit includes the 4th resistance R4, the 5th resistance R5 and the second triode Q2, the second triode
Q2 colelctor electrode connection first switch pipe Q1 grid, the second triode Q2 grounded emitter, the second triode Q2 base stage
It is grounded by the 4th resistance R4, the 5th resistance R5 is connected between the second triode Q2 base stage and emitter stage.
It is preferred that auxiliary power module includes assists winding T1, the second diode D2, the second electric capacity C2, the 6th resistance R6
With the 4th diode D4, negative pole connection the voltage source VCC, the 4th diode D4 of the 4th diode positive pole connect the 6th resistance R6
One end, the 6th resistance R6 other end connects one section of the second electric capacity C2, the other end ground connection of the second electric capacity, assists winding T1
One section of ground connection, the assists winding T1 other end connects the second diode D2 positive pole, the second diode D2 negative pole connection the
Six resistance R6, the 6th resistance R6 the second electric capacity of connection C2 one section of first delay circuit of connection.
It is preferred that first switch pipe Q1 is N-type metal-oxide-semiconductor, the first diode D1 and the second diode D2 are the pole of NPN type two
Pipe.
The beneficial effects of the utility model are：The utility model has the characteristics that quick startup, the skill of stable operation
Art circuit, solve existing chip and start the problems such as circuit power consumption after spread of voltage, stable operation is excessive.The utility model proposes
The power supply circuit of power supply control chip ensure the power supply stability of chip by setting up the first delay circuit so that auxiliary electricity
Source has the sufficiently long time to establish；After first switch circuit make it that accessory power supply output is stable, the first startup power supply is cut off, greatly
Ground reduces the power consumption of circuit.In addition, the delay time of the first delay circuit is controllable, suitable circuit element may be selected
Parameter value adjusts delay time；Second delay circuit can be in the case of transformer output short-circuit, can be with delay start power supply
The time re-powered to chip.
Brief description of the drawings
Fig. 1 is conventional power source control chip power supply circuit,
Fig. 2 is the utility model circuit modular structure schematic diagram,
Fig. 3 is the utility model circuit diagram.
Embodiment
The utility model is described further with reference to the accompanying drawings and examples.
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the operation principle in embodiment is carried out in detail, clearly to say
State, the reference numerals in certain accompanying drawing represent general similar device.
Fig. 1 is a kind of existing power supply control chip power supply circuit schematic diagram, and input power VIN charges through R to electric capacity C,
Voltage VCC on C is the power supply of power supply chip, and after chip operation, assists winding T is also chip power supply by D, and electric
It is very big to hinder power consumption on R.Cause greatly to waste, influence the stability of circuit.
As shown in Figure 2 to Figure 3, a kind of power supply control chip power supply circuit, connection input power VIN startup power supply is included
Module 11, the power supply handover module 13 and auxiliary power module 12 of connection startup power supply module 11, power supply handover module 13 with it is auxiliary
Power module 12 is helped to connect, the output end of auxiliary power module 12 is used to connect electrical equipment；Startup power supply module 11 include according to
Secondary the first switch pipe Q1 for being connected to input power VIN and the first electric capacity C1；Power supply handover module 13 includes the first delay circuit
131 and first switch circuit 132.
First switch pipe Q1 drain electrode passes through electricity by resistance R1 connection input power VIN, first switch pipe Q1 grid
Resistance R2 is connected with first switch pipe Q1 drain electrode, and first switch pipe Q1 source electrode connects the first electric capacity C1 one end, the first electric capacity
C1 other end ground connection, the first electric capacity C1 earth terminal also pass through voltage-stabiliser tube ZD1 connection first switch pipes Q1 grid.
Voltage-stabiliser tube ZD1 negative electrode connection first switch pipe Q1 grid, voltage-stabiliser tube ZD1 anode connect the first electric capacity C1's
Earth terminal.
First delay circuit 131 includes the 3rd diode D3,3rd resistor R3 and the 3rd electric capacity C3, the 3rd diode D3
Negative pole connection auxiliary power module 12, the 3rd diode D3 positive pole connection 3rd resistor R3 one end, 3rd resistor R3's
The other end is grounded by the 3rd electric capacity C3, and the electric capacity C3 of 3rd resistor R3 connections the 3rd one end connects first switch circuit simultaneously
132。
First switch circuit 132 includes the 4th resistance R4, the 5th resistance R5 and the second triode Q2, the second triode Q2
Colelctor electrode connection first switch pipe Q1 grid, the second triode Q2 grounded emitter, the second triode Q2 base stage leads to
The 4th resistance R4 ground connection is crossed, the 5th resistance R5 is connected between the second triode Q2 base stage and emitter stage.
First switch pipe Q1 selects N-type metal-oxide-semiconductor, and the first diode D1 and the second diode D2 select NPN type diode.
Auxiliary power module 12 includes assists winding T1, the second diode D2, the second electric capacity C2, the 6th resistance R6 and the
Four diode D4, negative pole connection the voltage source VCC, the 4th diode D4 of the 4th diode positive pole connect the 6th resistance R6's
One end, the 6th resistance R6 other end connect one section of the second electric capacity C2, and the other end of the second electric capacity is grounded, assists winding T1
One section of ground connection, the assists winding T1 other end connects the second diode D2 positive pole, the second diode D2 negative pole connection the
Six resistance R6, the 6th resistance R6 the second electric capacity of connection C2 one section of first delay circuit 131 of connection.
First switch pipe Q1 control input power supply VIN charge to the first electric capacity C1, and the first electric capacity C1 voltage is used to start
Power supply control chip, auxiliary power module 12 is connected with the first startup power supply VCC and is controlled by power supply control chip to be supplied for chip
Electricity, auxiliary power module 12 are powered for power supply handover module 13 simultaneously, after auxiliary power module 12, which exports, to be established, delay one
The section time, after the output of auxiliary power module 12 is stable, power supply handover module 13 turns off startup power supply module 11, by auxiliary electricity
Source module 12 is chip power supply.
It is chip stable power-supplying that auxiliary power module 12, which is used for after power supply control chip starts,.Power supply handover module 13
Input power provided by auxiliary power module, the input power is through the 3rd diode D3,3rd resistor R3 and the 3rd electric capacity C3
Ground connection；
A kind of power supply control chip power supply circuit operation principle of the present embodiment is：When startup power supply module 11 connects input electricity
After the VIN of source, VIN powers through first resistor R1, second resistance R2, voltage-stabiliser tube Z1 to first switch pipe Q1 gate-to-source, so as to
First switch pipe Q1 is turned on, and input power VIN charges through R1, first switch pipe Q1 to the first electric capacity C1, the first electric capacity C1 electricity
Press (i.e. the first startup power supply VCC), voltage (accessory power supply) is produced by the assists winding of power supply control chip control, this voltage is same
When by the second diode D2, the 6th resistance R6, the first diode D1 to chip provide power supply, in addition the voltage cut as power supply
The input of block 12 is changed the mold, the 3rd diode D3,3rd resistor R3 is flowed through and the first delay circuit is used as to the 3rd electric capacity C3 chargings, the
After three electric capacity C3 are full of, the second triode Q2 turns on because of the voltage on the 5th resistance R5, so as to cut off startup power supply as electricity
Source control chip power supply, greatly reduce the power consumption of circuit.Can be by selecting suitable 3rd resistor R3 and the 3rd electric capacity C3
Value come control startup power supply accessory power supply foundation after shut-off delay time, so as to ensure power supply control chip can stablize open
After dynamic, steady operation, the power consumption of circuit is reduced to minimum.Especially, after frequency converter main power source power down, input voltage is worked as
VIN drops to after switching power supply of frequency converter is stopped, be made up of the 3rd electric capacity C3, the 4th resistance R4, the 5th resistance R5
Two delay circuits, switching tube off state can be maintained certain time, avoid causing the power consumption of redundancy.
A kind of application circuit of the power supply control chip powering mode of switching power supply of frequency converter is the utility model is related to, especially
It is for excessive and high to the power consumption requirements application background of the load transients starting current of chip.The utility model can realize electricity
The switching of source control chip power supply, meet that load starts the high current requirement of moment.After accessory power supply foundation, power supply
Chip power is switched to accessory power supply to power by handover module.Consequently, it is possible to powering mode, you can meet what load started
Transient high-current, can also solve the problems, such as circuit power consumption.
It should be appreciated that for those of ordinary skills, can according to the above description be improved or converted,
And all these modifications and variations should all belong to the protection domain of the appended claims for the utility model.
Claims (6)
- A kind of 1. power supply control chip power supply circuit, it is characterised in that：Startup power supply module including connecting input power VIN (11) the power supply handover module (13) and auxiliary power module (12), the power supply for, connecting the startup power supply module (11) are cut Mold changing block (13) is connected with the auxiliary power module (12), and the output end of the auxiliary power module (12) is used to connect electricity consumption Equipment；The startup power supply module (11) includes being sequentially connected to input power VIN first switch pipe Q1 and the first electric capacity C1； The power supply handover module (13) includes the first delay circuit (131) and first switch circuit (132).
- A kind of 2. power supply control chip power supply circuit according to claim 1, it is characterised in that：The first switch pipe Q1 Drain electrode by the resistance R1 connections input power VIN, the grid of the first switch pipe Q1 passes through resistance R2 and described the One switching tube Q1 drain electrode connection, source electrode connection the first electric capacity C1 of first switch pipe Q1 one end, described first Electric capacity C1 other end ground connection, the earth terminal of the first electric capacity C1 also pass through the voltage-stabiliser tube ZD1 connections first switch pipe Q1 Grid.
- A kind of 3. power supply control chip power supply circuit according to claim 2, it is characterised in that：The voltage-stabiliser tube ZD1's Negative electrode connects the grid of the first switch pipe Q1, and the anode of the voltage-stabiliser tube ZD1 connects the earth terminal of the first electric capacity C1.
- A kind of 4. power supply control chip power supply circuit according to claim 3, it is characterised in that：First delay circuit (131) the 3rd diode D3,3rd resistor R3 and the 3rd electric capacity C3 are included, the negative pole connection of the 3rd diode D3 is described auxiliary Power module (12) is helped, the positive pole of the 3rd diode D3 connects one end of the 3rd resistor R3, the 3rd resistor R3 The other end be grounded by the 3rd electric capacity C3, described in one end of 3rd resistor R3 connections the 3rd electric capacity C3 connects simultaneously First switch circuit (132).
- A kind of 5. power supply control chip power supply circuit according to claim 4, it is characterised in that：The first switch circuit (132) the 4th resistance R4, the 5th resistance R5 and the second triode Q2 are included, described in the colelctor electrode connection of the second triode Q2 First switch pipe Q1 grid, the grounded emitter of the second triode Q2, the base stage of the second triode Q2 pass through institute The 4th resistance R4 ground connection is stated, the 5th resistance R5 is connected between the base stage and emitter stage of the second triode Q2.
- A kind of 6. power supply control chip power supply circuit according to claim 5, it is characterised in that：The auxiliary power module (12) assists winding T1, the second diode D2, the second electric capacity C2, the 6th resistance R6 and the 4th diode D4 are included, the described 4th Negative pole connection the voltage source VCC, the 4th diode D4 of diode positive pole connect one end of the 6th resistance R6, described The 6th resistance R6 other end connects one section of the second electric capacity C2, the other end ground connection of second electric capacity, the assists winding T1 one section of ground connection, the other end of the assists winding T1 connect the second diode D2 positive pole, the second diode D2's Negative pole connects the 6th resistance R6, one section of connection, first delay of the 6th resistance R6 connections the second electric capacity C2 Circuit (131).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720275575.3U CN207184308U (en) | 2017-03-21 | 2017-03-21 | A kind of power supply control chip power supply circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720275575.3U CN207184308U (en) | 2017-03-21 | 2017-03-21 | A kind of power supply control chip power supply circuit |
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| Publication Number | Publication Date |
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| CN207184308U true CN207184308U (en) | 2018-04-03 |
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ID=61732366
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| CN201720275575.3U Active CN207184308U (en) | 2017-03-21 | 2017-03-21 | A kind of power supply control chip power supply circuit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112260529A (en) * | 2020-10-15 | 2021-01-22 | 西安爱科赛博电气股份有限公司 | High-voltage direct-current input switching power supply and starting auxiliary source locking method |
-
2017
- 2017-03-21 CN CN201720275575.3U patent/CN207184308U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112260529A (en) * | 2020-10-15 | 2021-01-22 | 西安爱科赛博电气股份有限公司 | High-voltage direct-current input switching power supply and starting auxiliary source locking method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address |
Address after: 430040 workshop D, no.6, ligongyuan Road, Science Park, Wuhan University of technology, Donghu Development Zone, Wuhan City, Hubei Province Patentee after: Wuhan Gangdi Technology Co.,Ltd. Address before: 430223 No. 6, Ligong Road, science and Technology Park, Donghu New Technology Development Zone, Wuhan City, Hubei Province Patentee before: WUHAN GUIDE ELECTRIC DRIVE TECHNOLOGY Co.,Ltd. |
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| CP03 | Change of name, title or address |