CN207691685U - A kind of inverse-excitation type accessory power supply - Google Patents
A kind of inverse-excitation type accessory power supply Download PDFInfo
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- CN207691685U CN207691685U CN201820032444.7U CN201820032444U CN207691685U CN 207691685 U CN207691685 U CN 207691685U CN 201820032444 U CN201820032444 U CN 201820032444U CN 207691685 U CN207691685 U CN 207691685U
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- 230000005669 field effect Effects 0.000 claims abstract description 16
- 239000004065 semiconductor Substances 0.000 claims abstract description 14
- 230000005611 electricity Effects 0.000 claims description 9
- 230000006698 induction Effects 0.000 claims description 6
- 230000000087 stabilizing effect Effects 0.000 claims 3
- 230000006641 stabilisation Effects 0.000 abstract description 2
- 238000011105 stabilization Methods 0.000 abstract description 2
- 230000009286 beneficial effect Effects 0.000 abstract 1
- 238000001514 detection method Methods 0.000 description 8
- 238000005516 engineering process Methods 0.000 description 3
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- 230000005347 demagnetization Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
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- 230000005284 excitation Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
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Abstract
The utility model is related to a kind of inverse-excitation type accessory power supplys, including input and regulator circuit, Voltage Feedback and compensation circuit, metal-oxide-semiconductor and its driving circuit, first transformer secondary output rectifying output circuit and the second transformer secondary output rectifying output circuit, wherein, metal-oxide-semiconductor and its driving circuit contain driving chip U1 and field-effect transistor FET1, driving chip U1 is that metal-oxide-semiconductor drives core UC3844, driving chip U1 is provided with 8 pins, input and regulator circuit, Voltage Feedback and compensation circuit and metal-oxide-semiconductor and its driving circuit are connected with each other, first transformer secondary output rectifying output circuit passes through inductance connection with input and regulator circuit, second transformer secondary output rectifying output circuit and Voltage Feedback and compensation circuit.The utility model has the beneficial effects that：Input can be isolated between multiple-channel output, prevent grounding interference；Circuit is simple, output voltage stabilization.
Description
Technical field
The utility model is related to power technique fields, and in particular to a kind of inverse-excitation type accessory power supply.
Background technology
With the development of electronic technology industry, all kinds of power electronic products are more and more, the uses of various power tubes also day
Benefit increases.One of an important factor for driving circuit of power tube is guarantee overall efficiency, the driving power of stability and high efficiency are to ensure
The premise of driving circuit normal work.For diversified driving circuit power supply requirement, the effective auxiliary electricity of inverse-excitation type driving power
Source provides benchmark voltage while driving power pipe for feedback circuit etc..
For example, application No. is 201610218548.2 Chinese invention patent application, a kind of flyback power supply system is disclosed
System, including：Transformer；Control chip, including the first detection circuit and the second detection circuit, the wherein auxiliary winding of transformer
One end is directly grounded, and the other end is grounded via bleeder circuit, and the first detection circuit and the second detection circuit are connected to control chip
The same pin, and be connected to the terminals between the divider resistance in bleeder circuit via the pin and thermistor,
Within the demagnetization time of transformer, the first detection circuit and the second detection circuit alternately overvoltage protection detection and overheat protector
Detection.
In another example application No. is 201220655182.2 Chinese utility model patent, the utility model discloses one kind
Flyback power supply circuit, including the control source electricity corresponding to the primary side A of DC power supply, pwm chip U1, transformer T1
Road, the power supply circuit of pwm chips of the first secondary B corresponding to of transformer T1, transformer T1 second it is secondary while C corresponding to
First via voltage follower circuit and isolation collection voltages feedback circuit, transformer T1 third pair side D corresponding to the second tunnel
Voltage follower circuit；By the mutual cooperation of pwm chip and each parallel circuit, by transformer T1 more secondary sides extension from
And realize the multiple-channel output of flyback power supply circuit.
Traditional reverse excitation circuit is mostly the realization of function to be carried out using the electronic chip of integrated form, and flyback power supply is electric
The higher price of the integrated type electrical chip on road, the price of a chip is usually at 70~80 yuan, and a chip can only be realized
It exports all the way, to realize multiple-channel output, then need multiple chips so that power circuit manufacturing cost is excessively high, and due to chip
Output parameter is unable to flexible modulation, and there are certain limitations during application.
Utility model content
For deficiency in the prior art, the utility model offer is a kind of simple and reliable for structure, at low cost, flexible, and can
Realize the inverse-excitation type accessory power supply of multiple-channel output.
The technical solution of the utility model is：A kind of inverse-excitation type accessory power supply, including input and regulator circuit, Voltage Feedback
And compensation circuit, metal-oxide-semiconductor and its driving circuit, the first transformer secondary output rectifying output circuit and the second transformer secondary output rectification are defeated
Go out circuit, wherein metal-oxide-semiconductor and its driving circuit contain driving chip U1 and field-effect transistor FET1, and driving chip U1 is MOS
Pipe drives core UC3844, driving chip U1 to be provided with 8 pins, and pin 1 is compensation terminal, and pin 2 is Voltage Feedback terminal, is drawn
Foot 3 is current sense input, and pin 4 is RT/CT, and pin 5 is ground terminal, and pin 6 is leading-out terminal, and pin 7 is VCC,
Pin 8 is with reference to output, wherein RT/CT is to provide charging current to capacitance CT by resistance RT, and VCC is control integrated circuit
Positive supply, G is grid in field-effect transistor FET1, D is drain electrode, S is source electrode；Pin 6 is connect with resistance R15, pin 3 with
Capacitance C8 and resistance R7 interconnections, resistance R15 are connect with the grid G of field-effect transistor FET1, the source of field-effect transistor FET1
Pole S is interconnected with resistance R7, resistance R8 and resistance R9, capacitance C8, resistance R8 and resistance R9 interconnection ground connection,
Input and regulator circuit, Voltage Feedback and compensation circuit and metal-oxide-semiconductor and its driving circuit are connected with each other, specific to connect
Mode is that pin 4 is connect with capacitance C11, and pin 8 is interconnected with capacitance C9, resistance R6 and zener diode ZD4, pin 1 and capacitance
C12 connections, pin 2 are interconnected with resistance R1, resistance R2 and resistance R14, and pin 5 is grounded, pin 7 and zener diode ZD1, resistance
R4, capacitance C7, capacitance C13 and resistance R12 interconnections, resistance R4 are connected with zener diode ZD1, and resistance R6 is connect with capacitance C11,
Zener diode ZD4, resistance R5, capacitance C10 are sequentially connected, and capacitance C12, resistance R14 and resistance R2 are sequentially connected, capacitance C6 with
Zener diode ZD5 connections, zener diode ZD5 are connect with capacitance C5 and resistance R1 respectively, and capacitance C7 and the one end capacitance C13 are simultaneously
Connection ground, the other end are connect with resistance R12, and resistance R12 is connect with zener diode ZD3, zener diode ZD3 and resistance R13
Connection, the one end resistance R13 are interconnected with capacitance C6 and zener diode ZD5, and the other end and zener diode ZD3 and inductance L3 are mutual
Connection, resistance R4 connect with resistance R3, and capacitance C2 and capacitance C3 connect and capacitance C1 is connected in parallel ground connection, capacitance C4, resistance R11 and
Resistance R10 parallel connections one end is connect with zener diode ZD2, and the other end is interconnected with resistance R3, inductance L1, capacitance C1 and capacitance C2,
The drain D of zener diode ZD2, inductance L1 and field-effect transistor FET1 interconnect；
With input and regulator circuit by inductance connection, specific connection type is first transformer secondary output rectifying output circuit
Inductance L1 and inductance L2 is arranged in the position of mutual induction, and resistance R21, resistance R16, capacitance C14 and capacitance C15 are in parallel, capacitance
It is in series with zener diode ZD6 between C15 and resistance R16, capacitance C16, capacitance C17 and resistance R17 parallel connections one end capacitance C14,
Capacitance C15 and zener diode ZD6 interconnections, the other end are connect with inductance L2, resistance R21, resistance R16, zener diode ZD6 and
Inductance L2 interconnections；
Second transformer secondary output rectifying output circuit and Voltage Feedback and compensation circuit, specific connection type be inductance L3 with
Inductance L4 is arranged in the position of mutual induction, and resistance R18, resistance R19, capacitance C20 and capacitance C21 are in parallel, capacitance C20 and resistance
Be in series between R19 zener diode ZD7, capacitance C18, capacitance C19 and resistance R20 parallel connections one end capacitance C20, capacitance C21 and
Zener diode ZD7 interconnections, the other end are connect with inductance L4, and resistance R18, resistance R19, zener diode ZD7 and inductance L4 are mutual
Connection.
The advantageous effect of inverse-excitation type accessory power supply described in the utility model is：
1, input can be isolated between multiple-channel output, prevent grounding interference；
2, output voltage can be by changing resistance value Ra, Rb adjustment, and deformable type is more, can be suitably used under a variety of circuit conditions
It uses.
3, circuit is simple, output voltage stabilization, and multichannel boost voltage can be separated according to different demands to adapt to different circuits
Demand, improvement and deformation space it is big.
Description of the drawings
Fig. 1 is the circuit diagram of inverse-excitation type accessory power supply described in the utility model.
In figure shown in label：1- is inputted and regulator circuit, 2- Voltage Feedbacks and compensation circuit, 3-MOS pipes and its driving electricity
Road, 4- the first transformer secondary output rectifying output circuits, 5- the second transformer secondary output rectifying output circuits.
Specific implementation mode
Inverse-excitation type accessory power supply described in the utility model is done into one with specific implementation mode with reference to the accompanying drawings of the specification
Step is described in detail.
As shown in Figure 1, inverse-excitation type accessory power supply described in the utility model, including input and regulator circuit 1, Voltage Feedback and
Compensation circuit 2, metal-oxide-semiconductor and its driving circuit 3, the first transformer secondary output rectifying output circuit 4 and the second transformer secondary output rectification
Output circuit 5, wherein metal-oxide-semiconductor and its driving circuit 3 contain driving chip U1 and field-effect transistor FET1, driving chip U1
Core UC3844, driving chip U1 is driven to be provided with 8 pins for metal-oxide-semiconductor, pin 1 is compensation terminal, pin 2 is pressure feedback port
Son, pin 3 are current sense input, pin 4 is RT/CT, pin 5 is ground terminal, pin 6 is leading-out terminal, pin 7 is
VCC, pin 8 are that reference exports, and G is grid in field-effect transistor FET1, D is drain electrode, S is source electrode；Pin 6 and resistance R15
Connection, pin 3 and capacitance C8 and resistance R7 are interconnected, and resistance R15 is connect with the grid G of field-effect transistor FET1, and field-effect is brilliant
The source S of body pipe FET1 is interconnected with resistance R7, resistance R8 and resistance R9, capacitance C8, resistance R8 and resistance R9 interconnection ground connection；
Input and regulator circuit 1, Voltage Feedback and compensation circuit 2 and metal-oxide-semiconductor and its driving circuit 3 are connected with each other, specifically
Connection type is that pin 4 connect with capacitance C11, pin 8 and capacitance C9, resistance R6 and zener diode ZD4 interconnections, pin 1 and
Capacitance C12 connections, pin 2 are interconnected with resistance R1, resistance R2 and resistance R14, and pin 5 is grounded, pin 7 and zener diode ZD1,
Resistance R4, capacitance C7, capacitance C13 and resistance R12 interconnections, resistance R4 are connected with zener diode ZD1, resistance R6 and capacitance C11
Connection, zener diode ZD4, resistance R5, capacitance C10 are sequentially connected, and capacitance C12, resistance R14 and resistance R2 are sequentially connected, electricity
Hold C6 to connect with zener diode ZD5, zener diode ZD5 is connect with capacitance C5 and resistance R1 respectively, capacitance C7 and capacitance C13
One end earth, the other end are connect with resistance R12, and resistance R12 is connect with zener diode ZD3, zener diode ZD3 and electricity
R13 connections are hindered, the one end resistance R13 is interconnected with capacitance C6 and zener diode ZD5, the other end and zener diode ZD3 and inductance
L3 is interconnected, and resistance R4 is connect with resistance R3, and capacitance C2 and capacitance C3 series connection are connected in parallel ground connection, capacitance C4, resistance with capacitance C1
R11 and resistance R10 parallel connections one end are connect with zener diode ZD2, the other end and resistance R3, inductance L1, capacitance C1 and capacitance C2
Interconnection, the drain D interconnection of zener diode ZD2, inductance L1 and field-effect transistor FET1；
First transformer secondary output rectifying output circuit 4 passes through inductance connection, specific connection type with input and regulator circuit 1
For inductance L1 and inductance L2 is arranged in the position of mutual induction, and resistance R21, resistance R16, capacitance C14 and capacitance C15 are in parallel, electricity
It is in series with zener diode ZD6, capacitance C16, capacitance C17 and resistance R17 parallel connections one end capacitance between appearance C15 and resistance R16
C14, capacitance C15 and zener diode ZD6 interconnections, the other end are connect with inductance L2, resistance R21, resistance R16, zener diode
ZD6 is interconnected with inductance L2；
Second transformer secondary output rectifying output circuit 5 and Voltage Feedback and compensation circuit 2, specific connection type is inductance
L3 and inductance L4 are arranged in the position of mutual induction, and resistance R18, resistance R19, capacitance C20 and capacitance C21 are in parallel, capacitance C20 and
Zener diode ZD7, capacitance C18, capacitance C19 and resistance R20 parallel connections one end capacitance C20, capacitance are in series between resistance R19
C21 and zener diode ZD7 interconnections, the other end are connect with inductance L4, resistance R18, resistance R19, zener diode ZD7 and inductance
L4 is interconnected.
The utility model is not limited to the above embodiment, without departing substantially from the utility model in essence content, this
Any deformation, improvement, the replacement that field technology personnel are contemplated that each fall within the scope of protection of the utility model.
Claims (1)
1. a kind of inverse-excitation type accessory power supply, including input and regulator circuit (1), Voltage Feedback and compensation circuit (2), metal-oxide-semiconductor and
Its driving circuit (3), the first transformer secondary output rectifying output circuit (4) and the second transformer secondary output rectifying output circuit (5),
It is characterized in that, metal-oxide-semiconductor and its driving circuit (3) contain driving chip U1 and field-effect transistor FET1, and driving chip U1 is MOS
Pipe drives core UC3844, driving chip U1 to be provided with 8 pins, pin 1 be compensate terminal, pin 2 is Voltage Feedback terminal, draws
Foot 3 be current sense input, pin 4 be RT/CT, pin 5 is ground terminal, pin 6 is leading-out terminal, pin 7 be VCC,
Pin 8 is with reference to output, and G is grid in field-effect transistor FET1, D is drain electrode, S is source electrode；Pin 6 connects with resistance R15
It connects, pin 3 and capacitance C8 and resistance R7 are interconnected, and resistance R15 is connect with the grid G of field-effect transistor FET1, field effect transistor
The source S of pipe FET1 is interconnected with resistance R7, resistance R8 and resistance R9, capacitance C8, resistance R8 and resistance R9 interconnection ground connection, input and
Regulator circuit (1), Voltage Feedback and compensation circuit (2) and metal-oxide-semiconductor and its driving circuit (3) are connected with each other, specific connection type
It is connect with capacitance C11 for pin 4, pin 8 is interconnected with capacitance C9, resistance R6 and zener diode ZD4, and pin 1 connects with capacitance C12
It connects, pin 2 is interconnected with resistance R1, resistance R2 and resistance R14, and pin 5 is grounded, pin 7 and zener diode ZD1, resistance R4, electricity
Hold C7, capacitance C13 and resistance R12 interconnections, resistance R4 is connected with zener diode ZD1, and resistance R6 is connect with capacitance C11, voltage stabilizing
Diode ZD4, resistance R5, capacitance C10 are sequentially connected, and capacitance C12, resistance R14 and resistance R2 are sequentially connected, capacitance C6 and voltage stabilizing
Diode ZD5 connections, zener diode ZD5 are connect with capacitance C5 and resistance R1 respectively, and capacitance C7 and the one end capacitance C13 simultaneously couple
Ground, the other end are connect with resistance R12, and resistance R12 is connect with zener diode ZD3, and zener diode ZD3 is connect with resistance R13,
The one end resistance R13 is interconnected with capacitance C6 and zener diode ZD5, and the other end is interconnected with zener diode ZD3 and inductance L3, resistance
R4 is connect with resistance R3, and capacitance C2 and capacitance C3 series connection are connected in parallel ground connection, capacitance C4, resistance R11 and resistance R10 with capacitance C1
One end in parallel is connect with zener diode ZD2, and the other end is interconnected with resistance R3, inductance L1, capacitance C1 and capacitance C2, two pole of voltage stabilizing
The drain D of pipe ZD2, inductance L1 and field-effect transistor FET1 interconnect；
First transformer secondary output rectifying output circuit (4) passes through inductance connection, specific connection type with input and regulator circuit (1)
It is arranged in the position of mutual induction for inductance L1 and inductance L2, resistance R21, resistance R16, capacitance C14 and capacitance C15 are in parallel, electricity
It is in series with zener diode ZD6, capacitance C16, capacitance C17 and resistance R17 parallel connections one end capacitance between appearance C15 and resistance R16
C14, capacitance C15 and zener diode ZD6 interconnections, the other end are connect with inductance L2, resistance R21, resistance R16, zener diode
ZD6 is interconnected with inductance L2；
Second transformer secondary output rectifying output circuit (5) and Voltage Feedback and compensation circuit (2), specific connection type are inductance L3
It is arranged in the position of mutual induction with inductance L4, resistance R18, resistance R19, capacitance C20 and capacitance C21 are in parallel, capacitance C20 and electricity
It is in series with zener diode ZD7, capacitance C18, capacitance C19 and resistance R20 parallel connections one end capacitance C20, capacitance C21 between resistance R19
It is interconnected with zener diode ZD7, the other end is connect with inductance L4, resistance R18, resistance R19, zener diode ZD7 and inductance L4
Interconnection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820032444.7U CN207691685U (en) | 2018-01-09 | 2018-01-09 | A kind of inverse-excitation type accessory power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820032444.7U CN207691685U (en) | 2018-01-09 | 2018-01-09 | A kind of inverse-excitation type accessory power supply |
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| Publication Number | Publication Date |
|---|---|
| CN207691685U true CN207691685U (en) | 2018-08-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820032444.7U Expired - Fee Related CN207691685U (en) | 2018-01-09 | 2018-01-09 | A kind of inverse-excitation type accessory power supply |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110557028A (en) * | 2019-09-26 | 2019-12-10 | 特变电工西安电气科技有限公司 | Secondary auxiliary power supply circuit and working method |
| CN117833608A (en) * | 2024-01-03 | 2024-04-05 | 广东芯聚能半导体有限公司 | Gate-adjustable driving voltage circuit |
-
2018
- 2018-01-09 CN CN201820032444.7U patent/CN207691685U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110557028A (en) * | 2019-09-26 | 2019-12-10 | 特变电工西安电气科技有限公司 | Secondary auxiliary power supply circuit and working method |
| CN117833608A (en) * | 2024-01-03 | 2024-04-05 | 广东芯聚能半导体有限公司 | Gate-adjustable driving voltage circuit |
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Granted publication date: 20180803 |