CN107634653A - Width input high pressure communication power supply - Google Patents
Width input high pressure communication power supply Download PDFInfo
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- CN107634653A CN107634653A CN201711144598.1A CN201711144598A CN107634653A CN 107634653 A CN107634653 A CN 107634653A CN 201711144598 A CN201711144598 A CN 201711144598A CN 107634653 A CN107634653 A CN 107634653A
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Abstract
The present invention proposes a kind of wide input high pressure communication power supply, and it includes being used for the first binding post for connecting DC power anode and negative pole（T1）With the second binding post（T2）, Switching Power Supply control chip（U1）, high frequency transformer（TB1）, backfeed loop and voltage reference loop etc. is provided.Wide input high pressure communication power supply involved in the present invention; its DC supply input scope can expand to 0 ~ 1200V inputs; power supply primary and secondary side DC5000V isolates; DC3000V isolates between the two-way of output; wide input high pressure communication power supply involved in the present invention is applied to from high-pressure side power taking; isolation and the higher occasion of security requirement, it has the advantages of output overvoltage, under-voltage protection, input overcurrent protection and strong antijamming capability.
Description
Technical field
The present invention relates to communication power supply field, more particularly to a kind of wide input high pressure communication power supply.
Background technology
It is most of in existing communication equipment all to contain control system, all controlled mostly using single-chip microcomputer etc. in control system
Chip is controlled, and the power supply of these control chips is all light current, it is therefore desirable to using Switching Power Supply by external forceful electric power
Light current is converted into be powered for control system., can be defeated but the input voltage range of Switching Power Supply of the prior art is narrower
The voltage entered is, for example, 220V, 380V, 690V, and the voltage range that it is inputted is narrower, therefore the occasion applied is limited.
The content of the invention
In order to solve problems of the prior art, the present invention proposes a kind of wide input high pressure communication power supply, so as to
The scope of input direct voltage is expanded to 0 ~ 1200V of direct current inputs, meet more application scenarios.
To achieve these goals, the present invention proposes a kind of wide input high pressure communication power supply, including is respectively used to connect
First binding post of DC power anode and negative pole（T1）With the second binding post（T2）, first binding post（T1）
Through the 3rd fuse（FU3）Two lines road is drawn, wherein the 23rd resistance that one article of circuit is concatenated（R23）, the 24th
Resistance（R24）, the 25th resistance（R25）, the 26th resistance（R26）, the 27th resistance（R27）, the 28th resistance
（R28）, the 29th resistance（R29）And the 30th resistance（R30）It is connected to model FA13844P Switching Power Supply control
Chip（U1）7 pins；Its another connection is to high frequency power transformer（TB1）13 pins, the high frequency transformer（TB1）
13 pins and 17 pins between winding be primary side winding, the high frequency transformer（TB1）17 pins be connected to the four or two
Pole pipe（D4）Positive pole, its negative pole through parallel connection the 3rd electric capacity（C3）, 3rd resistor（R3）And the 4th resistance（R4）It is connected to institute
State high frequency transformer（TB1）13 pins；
The high frequency transformer（TB1）31 pins and 32 pins between winding be the first vice-side winding, from the high frequency become
Depressor（TB1）31 pin extraction wires be connected to the 3rd Schottky diode（D3）Positive pole, the pole of the 3rd Schottky two
Pipe（D3）Negative pole draw the first positive source connection end, the high frequency transformer（TB1）32 pin extraction wires through second
Fuse（FU2）Draw the first power cathode connection end；The high frequency transformer（TB1）35 pins and 36 pins between around
Group is the second vice-side winding, from the high frequency transformer（TB1）35 pin extraction wires be connected to the second Schottky diode
（D2）Positive pole, second Schottky diode（D2）Negative pole draw second source anode connection terminal, the high frequency transformation
Device（TB1）36 pin extraction wires through the first fuse（FU1）Draw second source negative pole connection end；
The high frequency transformer（TB1）2 pins and 3 pins between winding be the 3rd vice-side winding, from the high frequency transformation
Device（TB1）2 pin extraction wires ground connection（GND）, from the high frequency transformer（TB1）3 pin extraction wires be connected to
One Schottky diode（D1）Positive pole, its negative pole draws 5V power connector ends, and from first Schottky diode
（D1）Negative pole also draw parallel connection the first electrochemical capacitor（C1）, the second electrochemical capacitor（C2）And first resistor（R1）Ground connection
（GND）；The 5V power connector ends and inductance（L1）Connection, from the inductance（L1）Also extraction wire is connected to first luminous two
Pole pipe（FD1）Positive pole, its negative pole is through second resistance（R2）Ground connection（GND）；
From the 5V power connector ends also extraction wire through the 18th resistance（R18）It is connected to the accurate adjustable of model LM431
Reference voltage stabilizing source（U2）Reference edge, the accurate adjustable reference source of stable pressure（U2）Reference edge also through the 20th resistance（R20）
Ground connection（GND）, ten nine resistance of the reference edge also through parallel connection（R19）And the 9th electric capacity（C9）It is connected to the 17th resistance
（R17）One end, the 17th resistance（R17）Another be connected to the accurate adjustable reference source of stable pressure（U2）Negative pole,
The accurate adjustable reference source of stable pressure（U2）Plus earth（GND）, its negative pole is also through the 15th resistance（R15）It is connected to described
5V power connector ends, the 5V power connector ends are through the 13rd resistance（R13）It is connected to model PC817 photoelectrical coupler
（PS1）1 pin, the photoelectrical coupler（PS1）2 pins be connected to the accurate adjustable reference source of stable pressure（U2）Negative pole,
Its 3 pin is connected to COM ends, wherein the COM ends refer to the second binding post for connecting DC power cathode（T2）Through
Four fuses（FU4）The connection end of extraction；The photoelectrical coupler（PS1）4 pins be connected to Switching Power Supply control core
Piece（U1）1 pin, the photoelectrical coupler（PS1）The tenth electric capacity that is also concatenated of 4 pins（C10）And the 22nd electricity
Resistance（R22）It is connected to COM ends；
The Switching Power Supply control chip（U1）1 pin also through the 11st electric capacity（C11）It is connected to COM ends；The Switching Power Supply
Control chip（U1）2 pins be connected to COM ends, its 3 pin is through the 4th electric capacity（C4）COM ends are connected to, from the 4th electric capacity
（C4）Both ends draw the 7th resistance respectively（R7）With the 8th resistance（R8）It is connected to the 6th resistance（R6）First end, described
Six resistance（R6）The second end be connected to model IXBH16N170A metal-oxide-semiconductor（Q1）Grid, the metal-oxide-semiconductor（Q1）Hair
Emitter-base bandgap grading is connected to the 6th resistance（R6）First end, its colelctor electrode is connected to high frequency transformer（TB1）17 pins；The metal-oxide-semiconductor
（Q1）The 5th resistance that is also concatenated of grid（R5）And the tenth resistance（R10）It is connected to Switching Power Supply control chip（U1）6
Pin, the 6th Schottky diode（D6）Positive pole be connected to the 5th resistance（R5）And the tenth resistance（R10）Between line
On, the 6th Schottky diode（D6）Negative pole be connected to the Switching Power Supply control chip（U1）6 pins；It is described to open
Close power supply control chip（U1）4 pins through the 12nd electric capacity（C12）COM ends are connected to, 4 pin is additionally coupled to the 21st electricity
Resistance（R21）One end, the 21st resistance（R21）The other end draw two lines roads, wherein one article through the 13rd electric capacity
（C13）COM ends are connect, another is connected to the Switching Power Supply control chip（U1）8 pins；The Switching Power Supply control chip
（U1）5 pins be connected to COM ends, its 7 pin is also through the 7th electric capacity（C7）COM ends are connected to, 7 pin is additionally coupled to the 5th Xiao
Special based diode（D5）Negative pole, its positive pole is connected to the high frequency transformer（TB1）22 pins, the high frequency transformer
（TB1）22 pins and 21 pins between winding be the 4th vice-side winding, the high frequency transformer（TB1）21 pins be connected to
COM ends；
5th Schottky diode（D5）Negative pole also through the 9th resistance（R9）It is connected to the 2nd 3 of model 2N8550 the
Pole pipe（Q2）Emitter stage, the emitter stage is also through the 12nd resistance（R12）It is connected to the 7th diode（D7）Negative pole, described
Two triodes（Q2）Base stage be connected to the 7th diode（D7）Negative pole, second triode（Q2）Colelctor electrode connect
To model 2N8050 the 3rd triode（Q3）Base stage, the 3rd triode（Q3）Emitter stage be connected to COM ends, its collect
Electrode is connected to second triode（Q2）Base stage, the 7th diode（D7）Positive pole be connected to Switching Power Supply control
Chip（U1）1 pin, 1 pin is additionally coupled to the 9th diode（D9）Positive pole, the 9th diode（D9）Negative pole
Through the 8th electric capacity（C8）COM ends are connected to, the negative pole is also through the 14th resistance（R14）It is connected to the Switching Power Supply control chip（U1）
8 pins, the 8th diode（D8）Positive pole be connected to the 9th diode（D9）Negative pole, the 8th diode（D8）
Negative pole be connected to the Switching Power Supply control chip（U1）8 pins；5th Schottky diode（D5）Negative pole also
The 5th electrochemical capacitor through parallel connection（C5）And the 11st resistance（R11）It is connected to COM ends, the 5th Schottky diode（D5）
Negative pole be additionally coupled to model BZX84-A20 voltage-regulator diode（ZD1）Negative pole, the voltage-regulator diode（ZD1）Just
Sixth electric capacity of the pole through parallel connection（C6）And the 16th resistance（R16）It is connected to COM ends.
The beneficial effect of the program of the present invention is above-mentioned wide input high pressure communication power supply, its DC supply input scope
0 ~ 1200V inputs can be expanded to, power supply primary and secondary side DC5000V isolates, and DC3000V isolates between the two-way of output,
Wide input high pressure communication power supply involved in the present invention is applied to higher from high-pressure side power taking, isolation and security requirement
Occasion, it has the advantages of output overvoltage, under-voltage protection, input overcurrent protection and strong antijamming capability.
Brief description of the drawings
Fig. 1 shows the circuit theory diagrams of wide input high pressure communication power supply involved in the present invention.
Fig. 2 shows the enlarged drawing of part A in Fig. 1.
Fig. 3 shows the enlarged drawing of part B in Fig. 1.
Fig. 4 shows the enlarged drawing of C portion in Fig. 1.
Embodiment
The embodiment of the present invention is further described below in conjunction with the accompanying drawings.
As Figure 1-4, wide input high pressure communication power supply involved in the present invention includes being respectively used to connect dc source
The the first binding post T1 and the second binding post T2 of positive pole and negative pole, the first binding post T1 is through the 3rd fuse
FU3 draws two lines roads, wherein one article of circuit be concatenated the 23rd resistance R23, the 24th resistance R24, the 25th
Resistance R25, the 26th resistance R26, the 27th resistance R27, the 28th resistance R28, the 29th resistance R29 and
30 resistance R30 are connected to model FA13844P Switching Power Supply control chip U1 7 pins；Its another connection is extremely
High frequency transformer TB1 13 pins, the winding between 13 pins and 17 pins of the high frequency transformer TB1 are primary side winding,
17 pins of the high frequency transformer TB1 are connected to the 4th diode D4 positive pole, threeth electric capacity C3 of its negative pole through parallel connection, the
Three resistance R3 and the 4th resistance R4 are connected to 13 pins of the high frequency transformer TB1.
Winding between 31 pins and 32 pins of the high frequency transformer TB1 is the first vice-side winding, from the high frequency
Transformer TB1 31 pin extraction wires are connected to the 3rd Schottky diode D3 positive pole, the 3rd Schottky diode
D3 negative pole draws the first positive source connection end, according to demand, can adjust high frequency transformer TB1 winding so that output
Supply voltage for 5V, 12V, 24V etc..The 32 pin extraction wires of the high frequency transformer TB1 are drawn through the second fuse FU2
First power cathode connection end.Winding between 35 pins and 36 pins of the high frequency transformer TB1 is the second vice-side winding,
The second Schottky diode D2 positive pole, second Xiao are connected to from the 35 pin extraction wires of the high frequency transformer TB1
Special based diode D2 negative pole draws second source anode connection terminal, the 36 pin extraction wires warp of the high frequency transformer TB1
First fuse FU1 draws second source negative pole connection end.
Winding between 2 pins and 3 pins of the high frequency transformer TB1 is the 3rd vice-side winding, is become from the high frequency
Depressor TB1 2 pin extraction wires ground connection GND, first Xiao is connected to from the 3 pin extraction wires of the high frequency transformer TB1
Special based diode D1 positive pole, its negative pole draw 5V power connector ends, and from the negative pole of the first Schottky diode D1
Also draw the first electrochemical capacitor C1, the second electrochemical capacitor C2 and first resistor R1 ground connection GND of parallel connection；The 5V power supplys connection
End is connected with inductance L1, is connected to the first light emitting diode FD1 positive pole from the inductance L1 also extraction wires, and its negative pole is through the
Two resistance R2 are grounded GND.
The precision for being connected to model LM431 through the 18th resistance R18 from the 5V power connector ends also extraction wire can
Reference voltage stabilizing source U2 reference edge is adjusted, the reference edge of the accurate adjustable reference source of stable pressure U2 is also grounded through the 20th resistance R20
GND, ten nine resistance R19 and nineth electric capacity C9 of the reference edge also through parallel connection are connected to the 17th resistance R17 one end, described
17th resistance R17 another negative pole for being connected to the accurate adjustable reference source of stable pressure U2, the accurate adjustable reference voltage stabilizing
Source U2 plus earth GND, its negative pole are also connected to the 5V power connector ends through the 15th resistance R15,5V power supplys connection
End be connected to through the 13rd resistance R13 model PC817 photoelectrical coupler PS1 1 pin, the 2 of the photoelectrical coupler PS1
Pin is connected to the negative pole of the accurate adjustable reference source of stable pressure U2, and its 3 pin is connected to COM ends, wherein the COM ends refer to be used for
The connection end that second binding post T2 of connection DC power cathode is drawn through the 4th fuse FU4；The photoelectrical coupler PS1
4 pins be connected to 1 pin of the Switching Power Supply control chip U1, what 4 pins of the photoelectrical coupler PS1 were also concatenated
Tenth electric capacity C10 and the 22nd resistance R22 are connected to COM ends.
1 pin of the Switching Power Supply control chip U1 is also connected to COM ends through the 11st electric capacity C11；The Switching Power Supply
Control chip U1 2 pins are connected to COM ends, and its 3 pin is connected to COM ends through the 4th electric capacity C4, from the two of the 4th electric capacity C4
Hold and draw the first end that the 7th resistance R7 and the 8th resistance R8 is connected to the 6th resistance R6 respectively, the second of the 6th resistance R6
End is connected to model IXBH16N170A metal-oxide-semiconductor Q1 grid, and the emitter stage of the metal-oxide-semiconductor Q1 is connected to the 6th resistance R6's
First end, its colelctor electrode are connected to high frequency transformer TB1 17 pins；The 5th resistance that the grid of the metal-oxide-semiconductor Q1 is also concatenated
R5 and the tenth resistance R10 is connected to Switching Power Supply control chip U1 6 pins, and the 6th Schottky diode D6 positive pole is connected to
On line between 5th resistance R5 and the tenth resistance R10, the negative pole of the 6th Schottky diode D6 is connected to described
Switching Power Supply control chip U1 6 pins；4 pins of the Switching Power Supply control chip U1 are connected to COM through the 12nd electric capacity C12
End, 4 pin are additionally coupled to the 21st resistance R21 one end, and the other end of the 21st resistance R21 draws two lines
Road, wherein one article connects COM ends, another 8 pins for being connected to the Switching Power Supply control chip U1 through the 13rd electric capacity C13；Institute
5 pins for stating Switching Power Supply control chip U1 are connected to COM ends, and its 7 pin is also connected to COM ends through the 7th electric capacity C7,7 pin
The 5th Schottky diode D5 negative pole is additionally coupled to, its positive pole is connected to 22 pins of the high frequency transformer TB1, the height
Winding between frequency power transformer TB1 22 pins and 21 pins is the 4th vice-side winding, 21 pins of the high frequency transformer TB1
It is connected to COM ends.
The negative pole of the 5th Schottky diode D5 is also connected to the 2nd 3 of model 2N8550 through the 9th resistance R9
Pole pipe Q2 emitter stage, the emitter stage are also connected to the 7th diode D7 negative pole, the two or three pole through the 12nd resistance R12
Pipe Q2 base stage is connected to the negative pole of the 7th diode D7, and the colelctor electrode of the second triode Q2 is connected to model
2N8050 the 3rd triode Q3 base stage, the emitter stage of the 3rd triode Q3 are connected to COM ends, and its colelctor electrode is connected to described
Second triode Q2 base stage, the positive pole of the 7th diode D7 are connected to 1 pin of the Switching Power Supply control chip U1, should
1 pin is additionally coupled to the 9th diode D9 positive pole, and the negative pole of the 9th diode D9 is connected to COM ends through the 8th electric capacity C8,
The negative pole is also connected to 8 pins of the Switching Power Supply control chip U1 through the 14th resistance R14, and the 8th diode D8 positive pole connects
The negative pole of the 9th diode D9 is connected to, the negative pole of the 8th diode D8 is connected to the Switching Power Supply control chip U1
8 pins；Fiveth electrochemical capacitor C5 and ten one resistance R11 of the negative pole of the 5th Schottky diode D5 also through parallel connection
COM ends are connected to, the negative pole of the 5th Schottky diode D5 is additionally coupled to model BZX84-A20 voltage-regulator diode ZD1
Negative pole, the positive pole of the voltage-regulator diode ZD1 the 6th electric capacity C6 and the 16th resistance R16 through parallel connection are connected to COM ends.
During specific use, pass through the first binding post T1 and the external startup voltages of the second binding post T2
（Such as 150V）, now can to the Switching Power Supply control chip U1 7 pins input one startup voltage, and then cause its 6
Pin output pwm signal, to control metal-oxide-semiconductor Q1 to be switched on or off, and then the primary side winding of the high frequency transformer TB1 is obtained
Electricity, high frequency transformer TB1 start working；After the high frequency transformer TB1 starts working, pass through the of the high frequency transformer
7 pin powereds from four vice-side windings to the Switching Power Supply control chip U1, to maintain the Switching Power Supply control chip U1 works
Make；The voltage after transformation is outwards exported by the first vice-side winding and the second vice-side winding of the high frequency transformer TB1；It is logical
The electrical combination crossed at the 3rd vice-side winding output circuit and photoelectrical coupler PS1 of the high frequency transformer TB1 is formed instead
The B1 parts composition backfeed loop being fed back in A1 parts and Fig. 3 in road, that is, Fig. 2, when the Switching Power Supply controls core
When the dutycycle of the pwm signal of piece U1 6 pins output is improper, the related information of above feedback loop to institute can be passed through
Switching Power Supply control chip U1 1 pin is stated, now the Switching Power Supply control chip U1 can adjust the pwm signal of its output
Dutycycle.The effect of circuit in Fig. 4 is to provide voltage reference to the Switching Power Supply control chip U1.
Wide input high pressure communication power supply involved in the present invention, its DC supply input scope can expand to 0 ~ 1200V
Input, power supply primary and secondary side DC5000V isolate, and DC3000V isolates between the two-way of output, and involved in the present invention is wide defeated
Enter high pressure communication power supply to be applied to from high-pressure side power taking, isolation and the higher occasion of security requirement, it, which has, exported
The advantages of pressure, under-voltage protection, input overcurrent protection and strong antijamming capability.
Claims (1)
- A kind of 1. wide input high pressure communication power supply, it is characterised in that：Including being respectively used to connect DC power anode and negative pole The first binding post（T1）With the second binding post（T2）, first binding post（T1）Through the 3rd fuse（FU3）Draw Go out two lines road, wherein the 23rd resistance that one article of circuit is concatenated（R23）, the 24th resistance（R24）, the 25th electricity Resistance（R25）, the 26th resistance（R26）, the 27th resistance（R27）, the 28th resistance（R28）, the 29th resistance （R29）And the 30th resistance（R30）It is connected to model FA13844P Switching Power Supply control chip（U1）7 pins；Its Another connection is to high frequency power transformer（TB1）13 pins, the high frequency transformer（TB1）13 pins and 17 pins it Between winding be primary side winding, the high frequency transformer（TB1）17 pins be connected to the 4th diode（D4）Positive pole, it is negative Threeth electric capacity of the pole through parallel connection（C3）, 3rd resistor（R3）And the 4th resistance（R4）It is connected to the high frequency transformer（TB1）'s 13 pins；The high frequency transformer（TB1）31 pins and 32 pins between winding be the first vice-side winding, from the high frequency become Depressor（TB1）31 pin extraction wires be connected to the 3rd Schottky diode（D3）Positive pole, the pole of the 3rd Schottky two Pipe（D3）Negative pole draw the first positive source connection end, the high frequency transformer（TB1）32 pin extraction wires through second Fuse（FU2）Draw the first power cathode connection end；The high frequency transformer（TB1）35 pins and 36 pins between around Group is the second vice-side winding, from the high frequency transformer（TB1）35 pin extraction wires be connected to the second Schottky diode （D2）Positive pole, second Schottky diode（D2）Negative pole draw second source anode connection terminal, the high frequency transformation Device（TB1）36 pin extraction wires through the first fuse（FU1）Draw second source negative pole connection end；The high frequency transformer（TB1）2 pins and 3 pins between winding be the 3rd vice-side winding, from the high frequency transformation Device（TB1）2 pin extraction wires ground connection（GND）, from the high frequency transformer（TB1）3 pin extraction wires be connected to One Schottky diode（D1）Positive pole, its negative pole draws 5V power connector ends, and from first Schottky diode （D1）Negative pole also draw parallel connection the first electrochemical capacitor（C1）, the second electrochemical capacitor（C2）And first resistor（R1）Ground connection （GND）；The 5V power connector ends and inductance（L1）Connection, from the inductance（L1）Also extraction wire is connected to first luminous two Pole pipe（FD1）Positive pole, its negative pole is through second resistance（R2）Ground connection（GND）；From the 5V power connector ends also extraction wire through the 18th resistance（R18）It is connected to the accurate adjustable of model LM431 Reference voltage stabilizing source（U2）Reference edge, the accurate adjustable reference source of stable pressure（U2）Reference edge also through the 20th resistance（R20） Ground connection（GND）, ten nine resistance of the reference edge also through parallel connection（R19）And the 9th electric capacity（C9）It is connected to the 17th resistance （R17）One end, the 17th resistance（R17）Another be connected to the accurate adjustable reference source of stable pressure（U2）Negative pole, The accurate adjustable reference source of stable pressure（U2）Plus earth（GND）, its negative pole is also through the 15th resistance（R15）It is connected to described 5V power connector ends, the 5V power connector ends are through the 13rd resistance（R13）It is connected to model PC817 photoelectrical coupler （PS1）1 pin, the photoelectrical coupler（PS1）2 pins be connected to the accurate adjustable reference source of stable pressure（U2）Negative pole, Its 3 pin is connected to COM ends, wherein the COM ends refer to the second binding post for connecting DC power cathode（T2）Through Four fuses（FU4）The connection end of extraction；The photoelectrical coupler（PS1）4 pins be connected to Switching Power Supply control core Piece（U1）1 pin, the photoelectrical coupler（PS1）The tenth electric capacity that is also concatenated of 4 pins（C10）And the 22nd electricity Resistance（R22）It is connected to COM ends；The Switching Power Supply control chip（U1）1 pin also through the 11st electric capacity（C11）It is connected to COM ends；The Switching Power Supply Control chip（U1）2 pins be connected to COM ends, its 3 pin is through the 4th electric capacity（C4）COM ends are connected to, from the 4th electric capacity （C4）Both ends draw the 7th resistance respectively（R7）With the 8th resistance（R8）It is connected to the 6th resistance（R6）First end, described Six resistance（R6）The second end be connected to model IXBH16N170A metal-oxide-semiconductor（Q1）Grid, the metal-oxide-semiconductor（Q1）Hair Emitter-base bandgap grading is connected to the 6th resistance（R6）First end, its colelctor electrode is connected to high frequency transformer（TB1）17 pins；The metal-oxide-semiconductor （Q1）The 5th resistance that is also concatenated of grid（R5）And the tenth resistance（R10）It is connected to Switching Power Supply control chip（U1）6 Pin, the 6th Schottky diode（D6）Positive pole be connected to the 5th resistance（R5）And the tenth resistance（R10）Between line On, the 6th Schottky diode（D6）Negative pole be connected to the Switching Power Supply control chip（U1）6 pins；It is described to open Close power supply control chip（U1）4 pins through the 12nd electric capacity（C12）COM ends are connected to, 4 pin is additionally coupled to the 21st electricity Resistance（R21）One end, the 21st resistance（R21）The other end draw two lines roads, wherein one article through the 13rd electric capacity （C13）COM ends are connect, another is connected to the Switching Power Supply control chip（U1）8 pins；The Switching Power Supply control chip （U1）5 pins be connected to COM ends, its 7 pin is also through the 7th electric capacity（C7）COM ends are connected to, 7 pin is additionally coupled to the 5th Xiao Special based diode（D5）Negative pole, its positive pole is connected to the high frequency transformer（TB1）22 pins, the high frequency transformer （TB1）22 pins and 21 pins between winding be the 4th vice-side winding, the high frequency transformer（TB1）21 pins be connected to COM ends；5th Schottky diode（D5）Negative pole also through the 9th resistance（R9）It is connected to the 2nd 3 of model 2N8550 the Pole pipe（Q2）Emitter stage, the emitter stage is also through the 12nd resistance（R12）It is connected to the 7th diode（D7）Negative pole, described Two triodes（Q2）Base stage be connected to the 7th diode（D7）Negative pole, second triode（Q2）Colelctor electrode connect To model 2N8050 the 3rd triode（Q3）Base stage, the 3rd triode（Q3）Emitter stage be connected to COM ends, its collect Electrode is connected to second triode（Q2）Base stage, the 7th diode（D7）Positive pole be connected to Switching Power Supply control Chip（U1）1 pin, 1 pin is additionally coupled to the 9th diode（D9）Positive pole, the 9th diode（D9）Negative pole Through the 8th electric capacity（C8）COM ends are connected to, the negative pole is also through the 14th resistance（R14）It is connected to the Switching Power Supply control chip（U1） 8 pins, the 8th diode（D8）Positive pole be connected to the 9th diode（D9）Negative pole, the 8th diode（D8） Negative pole be connected to the Switching Power Supply control chip（U1）8 pins；5th Schottky diode（D5）Negative pole also The 5th electrochemical capacitor through parallel connection（C5）And the 11st resistance（R11）It is connected to COM ends, the 5th Schottky diode（D5） Negative pole be additionally coupled to model BZX84-A20 voltage-regulator diode（ZD1）Negative pole, the voltage-regulator diode（ZD1）Just Sixth electric capacity of the pole through parallel connection（C6）And the 16th resistance（R16）It is connected to COM ends.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711144598.1A CN107634653A (en) | 2017-11-17 | 2017-11-17 | Width input high pressure communication power supply |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711144598.1A CN107634653A (en) | 2017-11-17 | 2017-11-17 | Width input high pressure communication power supply |
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| CN107634653A true CN107634653A (en) | 2018-01-26 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111830423A (en) * | 2020-06-24 | 2020-10-27 | 东风电驱动系统有限公司 | Isolated high-voltage sampling circuit |
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