CN202565177U - Digital adjustable dual-output precise DC voltage stabilized power supply - Google Patents
Digital adjustable dual-output precise DC voltage stabilized power supply Download PDFInfo
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- CN202565177U CN202565177U CN201220217488XU CN201220217488U CN202565177U CN 202565177 U CN202565177 U CN 202565177U CN 201220217488X U CN201220217488X U CN 201220217488XU CN 201220217488 U CN201220217488 U CN 201220217488U CN 202565177 U CN202565177 U CN 202565177U
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Abstract
The utility model relates to a digital adjustable dual-output precise DC voltage stabilized power supply, falling into the technical field of power device. The circuit device takes a singlechip as control center, and includes a voltage stabilizing circuit, a singlechip peripheral circuit, a keyboard and display circuit, a D/A switching circuit, a phase inverting circuit, a bipolar output circuit and an overload protecting circuit. The singlechip receives keyboard control information, transmits to a display for display and transmits corresponding code to the D/A switching circuit according to displayed voltage value to make it output two paths of analog voltages, one path is directly applied on an input terminal for adjusting output V+, and the other path is applied on an input terminal for adjusting output V- after phase inversion (without amplitude value change). Two adjusting output tubes realize accurate bipolar voltage tracking adjustment and power output through amplification and negative feedback effects. Compared with existing stabilized power supply, the power supply has the advantages of low cost, simple structure, convenient operation, visual display, high control precision, good voltage stabilization and strong practicability.
Description
Technical field
The utility model relates to a kind of D.C. regulated power supply, relates in particular to a kind of digital adjustable two-way output precision DC stabilized voltage power supply, belongs to the application of electronic technology technical field.
Background technology
D.C. regulated power supply can provide the galvanic current source for all kinds of loads; Its application very extensively; How the D.C. regulated power supply that existing market is comparatively cheap adjusts the output size with the mode of manual adjustments potentiometer; Show numerical value with pointer instrument, user's required voltage, electric current are difficult to accurate control; And for Digital DC Voltage-Stabilized Power Source, though control is convenient, demonstration is accurate, price comparison is expensive, is difficult to most of user and accepts.
Summary of the invention
In order to address the above problem; The purpose of the utility model is to provide a kind of digital adjustable two-way output precision DC stabilized voltage power supply; Through two voltage stabilizing circuits, after voltage stabilizing, be respectively single-chip microcomputer and peripheral circuit thereof, bipolarity output circuits provides reliablely and stablely operating voltage; The governor circuit single-chip microcomputer is the control core, and keyboard circuit links to each other with the P1 mouth of single-chip microcomputer, is used for the size of control output voltage, and realizes the step change of output voltage; LED charactron display circuit is used to show the size of current output voltage; The D/A change-over circuit realizes that output voltage values by keyboard to set up is by the transformation of digital quantity to analog quantity; Phase inverter makes the output voltage anti-phase, realizes negative polarity output; Bipolarity output circuits is used to adjust output voltage to be made it to trend towards stablizing, and realizes the accurate tracking of output voltage; Overload protecting circuit is realized when power source loads is overweight, makes CPU can in time turn-off D/A output, and making output voltage is 0, prevents that power supply from burning.Be a kind of cheap, simple in structure, be easy to make and the adjustable two-way output of Practical Digital precision DC stabilized voltage power supply comparatively.
The utility model solves the technical scheme that its technical problem adopted: digital adjustable two-way output precision DC stabilized voltage power supply, it is made up of unipolarity voltage stabilizing circuit, bipolarity voltage stabilizing circuit, keyboard circuit, governor circuit, digital display circuit, D/A change-over circuit, phase inverter, positive polarity overload protecting circuit, negative polarity overload protecting circuit, positive polarity voltage output circuit, reverse voltage output circuit.3 pin of the output V1 of unipolarity voltage stabilizing circuit are connected with the R21～R28 of keyboard circuit, R31 and the R12 of R32, D/A change-over circuit and 8 pin of U2 of governor circuit respectively.3 pin of the positive polarity output terminal V2 of bipolarity voltage stabilizing circuit are connected with 7 pin of the U5 of 7 pin of the U4 of 7 pin of the U3 of 1 pin of positive polarity overload protecting circuit GO1, phase inverter, positive polarity voltage output circuit, reverse voltage output circuit respectively; 3 pin of the negative polarity output V3 of bipolarity voltage stabilizing circuit are connected with 1 pin of negative polarity overload protecting circuit GO2 respectively, 4 pin of the U5 of 4 pin of the U4 of 4 pin of the U3 of phase inverter, positive polarity voltage output circuit, reverse voltage output circuit connect.The button AN+ of keyboard circuit, AN-, BN+, BN-, CN+, CN-, DN+, DN-are connected with 1～8 pin of governor circuit U1 successively.13,14,15 pin of governor circuit U1 are connected with 2,3,1 pin of D/A change-over circuit U2 successively; 10 pin of governor circuit U1 are connected with 1,2 pin of the U10 of digital display circuit; 11 pin of governor circuit U1 are connected with 8 pin of digital display circuit U7～U10 respectively; 39 pin of governor circuit U1 are connected with 3 pin of the GO1 of positive polarity overload protecting circuit, and 38 pin of governor circuit U1 are connected with 3 pin of negative polarity overload protecting circuit GO2.4 pin of the U2 of D/A change-over circuit are connected with 3 pin of the U4 of positive polarity voltage output circuit and are connected with 2 pin of the U3 of phase inverter through R2.6 pin of phase inverter U3 are connected with 3 pin of the U5 of reverse voltage output circuit.2 pin of the GO1 of positive polarity overload protecting circuit are connected with the c pin of the TR1 of positive polarity voltage output circuit.2 pin of negative polarity overload protecting circuit GO2 are connected with the c pin of the TR2 of reverse voltage output circuit.The e pin of the TR1 of positive polarity voltage output circuit is positive polarity voltage output V+.The e pin of the TR2 of reverse voltage output circuit is reverse voltage output V-.
Described unipolarity voltage stabilizing circuit is to be made up of transformer T1, rectifier bridge Q1, V1, C7, C8, C9; Transformer T1 is elementary to be connected with 1,3 pin of rectifier bridge Q1 with next level of city's electrical connection; Its 2 pin of 4 pin ground connection of rectifier bridge Q1 is connected with 1 pin of V1 through C7, C8, and 3 pin of V1 are connected with C9 and are the output of unipolarity voltage stabilizing circuit.
Described bipolarity voltage stabilizing circuit is to be made up of T2, Q2, V2, V3, C10～C15; Transformer T2 is elementary to be connected with 1,3 pin of rectifier bridge Q2 with next level of city's electrical connection; 2 pin of rectifier bridge Q1 are connected with 1 pin of V2 through C10, C11, and 3 pin of V2 are connected with C12 and are the positive polarity voltage output of bipolarity voltage stabilizing circuit.4 pin of rectifier bridge Q1 are connected with 1 pin of V3 through C13, C14, and 3 pin of V3 are connected with C15 and are the reverse voltage output of bipolarity voltage stabilizing circuit.
Described keyboard circuit is to be made up of button AN+, AN-, BN+, BN-, CN+, CN-, DN+, DN-, R21～R28, and the end of R21～R28 interconnects its other end and is connected with the end of AN+, AN-, BN+, BN-, CN+, CN-, DN+, DN-successively.
Described governor circuit is to be made up of U1, JT1, C1, C2, C3, R1, R31, R32; The JT1 two ends are connected with 18,19 pin of U1 respectively and respectively through C1, C2 ground connection; The end of R31, R32 interconnects its other end and is connected with 38,39 pin of U1 respectively, and 9 pin of U1 are connected with 3 pin of the V1 of unipolarity voltage stabilizing circuit through R1 ground connection and through C3.
Described digital display circuit is to be made up of U7～U10, LED1～LED4, R41～R48, R51～R58, R61～R68, R71～R78; 1,2 pin of U7 connect the back and are connected with 13 pin of U8; 1,2 pin of U8 connect the back and are connected with 13 pin of U9; 1,2 pin of U9 connect the back and are connected with 13 pin of U10; 1,2 pin of U10 connect the back and are connected with 10 pin of governor circuit U1; Each of U7～U10 9 pin interconnect, and 8 pin of U7～U10 interconnect the back and are connected with 11 pin of governor circuit U1, and 3,4,5,6,10,11,12,13 pin of U7 are connected with 7,6,4,2,1,9,10,5 pin of LED1 through R41～R48 successively; 3,4,5,6,10,11,12,13 pin of U8 are connected with 7,6,4,2,1,9,10,5 pin of LED2 through R51～R58 successively; 3,4,5,6,10,11,12,13 pin of U9 are connected with 7,6,4,2,1,9,10,5 pin of LED3 through R61～R68 successively, and 3,4,5,6,10,11,12,13 pin of U10 are connected the equal ground connection of 3,8 pin of LED1～LED4 through R71～R78 successively with 7,6,4,2,1,9,10,5 pin of LED4.
Described D/A change-over circuit is to be made up of U2, U6, R10, R11, R12, C6, and 6 pin of U2 are connected with 3 pin of U6 and are connected with 2 pin through C6, and 8 pin of U2 are connected with 3 pin of U6 through R12 and are connected with 1 pin and are connected with 2 pin through R11 through R10.
Described phase inverter is to be made up of U3, R2, R3, and 2 pin of U3 are connected with its 6 pin through R3 and are connected with 3 pin of the U4 of positive polarity voltage output circuit through R2.
Described positive polarity overload protecting circuit is to be made up of optocoupler GO1, R4, and 1,2 pin of GO1 are connected with R4, and 3 pin connect 39 pin of governor circuit U1,4 pin ground connection.
Described negative polarity overload protecting circuit is to be made up of optocoupler GO2, R7, and 1,2 pin of GO2 are connected with R7, and 3 pin connect 38 pin of governor circuit U1,4 pin ground connection.
Described positive polarity voltage output circuit is to be made up of U4, TR1, R5, R6, C4; 6 pin of U4 are connected with the b pin of pliotron TR1; 2 pin of U4 are connected with the e pin of TR1 through R5, and the e pin of TR1 is the positive polarity voltage output of D.C. regulated power supply also through R6, C4 ground connection.
Described reverse voltage output circuit is to be made up of U5, TR2, R8, R9, C5; 6 pin of U5 are connected with the b pin of pliotron TR2; 2 pin of U5 are connected with the e pin of TR2 through R8, and the e pin of TR2 is the reverse voltage output of D.C. regulated power supply also through R9, C5 ground connection.
The beneficial effect of the utility model is: have the output of voltage two-way, equal, the tracking adjusting of amplitude, relevant organizational security is held predeterminated voltage value selection function last time.Directly through keyboard input predeterminated voltage; Can realize the voltage steps of " 1V; 100mV; 10mV, 1mV ", and this installation cost is very cheap, simple in structure, easy to operate, intuitive display, control precision high, voltage stability is good, be easy to make and the adjustable two-way output of Practical Digital precision DC stabilized voltage power supply comparatively.
Description of drawings
Below in conjunction with accompanying drawing and embodiment the utility model is further specified.
Fig. 1 is the square frame syndeton sketch map of the digital adjustable two-way output precision DC stabilized voltage power supply of the utility model.
Fig. 2 is the circuit principle structure sketch map of the digital adjustable two-way output precision DC stabilized voltage power supply of the utility model.
Embodiment
See also Fig. 1, Fig. 2; Digital adjustable two-way output precision DC stabilized voltage power supply, it is made up of unipolarity voltage stabilizing circuit, bipolarity voltage stabilizing circuit, keyboard circuit, governor circuit, digital display circuit, D/A change-over circuit, phase inverter, positive polarity overload protecting circuit, negative polarity overload protecting circuit, positive polarity voltage output circuit, reverse voltage output circuit.3 pin of the output V1 of unipolarity voltage stabilizing circuit are connected with the R21～R28 of keyboard circuit, R31 and the R12 of R32, D/A change-over circuit and 8 pin of U2 of governor circuit respectively.3 pin of the positive polarity output terminal V2 of bipolarity voltage stabilizing circuit are connected with 7 pin of the U5 of 7 pin of the U4 of 7 pin of the U3 of 1 pin of positive polarity overload protecting circuit GO1, phase inverter, positive polarity voltage output circuit, reverse voltage output circuit respectively; 3 pin of the negative polarity output V3 of bipolarity voltage stabilizing circuit are connected with 1 pin of negative polarity overload protecting circuit GO2 respectively, 4 pin of the U5 of 4 pin of the U4 of 4 pin of the U3 of phase inverter, positive polarity voltage output circuit, reverse voltage output circuit connect.The button AN+ of keyboard circuit, AN-, BN+, BN-, CN+, CN-, DN+, DN-are connected with 1～8 pin of governor circuit U1 successively.13,14,15 pin of governor circuit U1 are connected with 2,3,1 pin of D/A change-over circuit U2 successively; 10 pin of governor circuit U1 are connected with 1,2 pin of the U10 of digital display circuit; 11 pin of governor circuit U1 are connected with 8 pin of digital display circuit U7～U10 respectively; 39 pin of governor circuit U1 are connected with 3 pin of the GO1 of positive polarity overload protecting circuit, and 38 pin of governor circuit U1 are connected with 3 pin of negative polarity overload protecting circuit GO2.4 pin of the U2 of D/A change-over circuit are connected with 3 pin of the U4 of positive polarity voltage output circuit and are connected with 2 pin of the U3 of phase inverter through R2.6 pin of phase inverter U3 are connected with 3 pin of the U5 of reverse voltage output circuit.2 pin of the GO1 of positive polarity overload protecting circuit are connected with the c pin of the TR1 of positive polarity voltage output circuit.2 pin of negative polarity overload protecting circuit GO2 are connected with the c pin of the TR2 of reverse voltage output circuit.The e pin of the TR1 of positive polarity voltage output circuit is positive polarity voltage output V+.The e pin of the TR2 of reverse voltage output circuit is reverse voltage output V-.
Described unipolarity voltage stabilizing circuit is to be made up of transformer T1, rectifier bridge Q1, V1, C7, C8, C9; Transformer T1 is elementary to be connected with 1,3 pin of rectifier bridge Q1 with next level of city's electrical connection; Its 2 pin of 4 pin ground connection of rectifier bridge Q1 is connected with 1 pin of V1 through C7, C8, and 3 pin of V1 are connected with C9 and are the output of unipolarity voltage stabilizing circuit.
Described bipolarity voltage stabilizing circuit is to be made up of T2, Q2, V2, V3, C10～C15; Transformer T2 is elementary to be connected with 1,3 pin of rectifier bridge Q2 with next level of city's electrical connection; 2 pin of rectifier bridge Q1 are connected with 1 pin of V2 through C10, C11, and 3 pin of V2 are connected with C12 and are the positive polarity voltage output of bipolarity voltage stabilizing circuit.4 pin of rectifier bridge Q1 are connected with 1 pin of V3 through C13, C14, and 3 pin of V3 are connected with C15 and are the reverse voltage output of bipolarity voltage stabilizing circuit.
Described keyboard circuit is to be made up of button AN+, AN-, BN+, BN-, CN+, CN-, DN+, DN-, R21～R28, and the end of R21～R28 interconnects its other end and is connected with the end of AN+, AN-, BN+, BN-, CN+, CN-, DN+, DN-successively.
Described governor circuit is to be made up of U1, JT1, C1, C2, C3, R1, R31, R32; The JT1 two ends are connected with 18,19 pin of U1 respectively and respectively through C1, C2 ground connection; The end of R31, R32 interconnects its other end and is connected with 38,39 pin of U1 respectively, and 9 pin of U1 are connected with 3 pin of the V1 of unipolarity voltage stabilizing circuit through R1 ground connection and through C3.
Described digital display circuit is to be made up of U7～U10, LED1～LED4, R41～R48, R51～R58, R61～R68, R71～R78; 1,2 pin of U7 connect the back and are connected with 13 pin of U8; 1,2 pin of U8 connect the back and are connected with 13 pin of U9; 1,2 pin of U9 connect the back and are connected with 13 pin of U10; 1,2 pin of U10 connect the back and are connected with 10 pin of governor circuit U1; Each of U7～U10 9 pin interconnect, and 8 pin of U7～U10 interconnect the back and are connected with 11 pin of governor circuit U1, and 3,4,5,6,10,11,12,13 pin of U7 are connected with 7,6,4,2,1,9,10,5 pin of LED1 through R41～R48 successively; 3,4,5,6,10,11,12,13 pin of U8 are connected with 7,6,4,2,1,9,10,5 pin of LED2 through R51～R58 successively; 3,4,5,6,10,11,12,13 pin of U9 are connected with 7,6,4,2,1,9,10,5 pin of LED3 through R61～R68 successively, and 3,4,5,6,10,11,12,13 pin of U10 are connected the equal ground connection of 3,8 pin of LED1～LED4 through R71～R78 successively with 7,6,4,2,1,9,10,5 pin of LED4.
Described D/A change-over circuit is to be made up of U2, U6, R10, R11, R12, C6, and 6 pin of U2 are connected with 3 pin of U6 and are connected with 2 pin through C6, and 8 pin of U2 are connected with 3 pin of U6 through R12 and are connected with 1 pin and are connected with 2 pin through R11 through R10.
Described phase inverter is to be made up of U3, R2, R3, and 2 pin of U3 are connected with its 6 pin through R3 and are connected with 3 pin of the U4 of positive polarity voltage output circuit through R2.
Described positive polarity overload protecting circuit is to be made up of optocoupler GO1, R4, and 1,2 pin of GO1 are connected with R4, and 3 pin connect 39 pin of governor circuit U1,4 pin ground connection.
Described negative polarity overload protecting circuit is to be made up of optocoupler GO2, R7, and 1,2 pin of GO2 are connected with R7, and 3 pin connect 38 pin of governor circuit U1,4 pin ground connection.
Described positive polarity voltage output circuit is to be made up of U4, TR1, R5, R6, C4; 6 pin of U4 are connected with the b pin of pliotron TR1; 2 pin of U4 are connected with the e pin of TR1 through R5, and the e pin of TR1 is the positive polarity voltage output of D.C. regulated power supply also through R6, C4 ground connection.
Described reverse voltage output circuit is to be made up of U5, TR2, R8, R9, C5; 6 pin of U5 are connected with the b pin of pliotron TR2; 2 pin of U5 are connected with the e pin of TR2 through R8, and the e pin of TR2 is the reverse voltage output of D.C. regulated power supply also through R9, C5 ground connection.
Circuit working principle and method for using: at first, after rectifier bridge rectification, filtering, become direct current then, supply subsequent conditioning circuit to use through output 5V and positive and negative 15V voltage after the three terminal integrated voltage stabilizer voltage stabilizing again by the alternating current step-down of power transformer with 220V.Governor circuit is after unipolarity voltage stabilizing circuit energized; CPU (U1) at first carries out to power on and automatically resets, and after the end that resets, internal processes begins to carry out; When the user imported predetermined voltage in keyboard circuit after, governor circuit CPU gave D/A change-over circuit with the code of correspondence.The D/A change-over circuit links to each other with P3.4, P3.5, the P3.6 pin of governor circuit CPU; The voltage setting value of reference voltage that provides according to the adjustable reference source and keyboard circuit input calculates the analog voltage of needs output, and the OUTA pin output through the D/A change-over circuit.The aanalogvoltage of output is divided into two-way, and one the tunnel is delivered directly to positive polarity voltage output circuit and overload protecting circuit thereof, and another road then is transported to reverse voltage output circuit and overload protecting circuit thereof through phase inverter.Phase inverter is that it is constant to become amplitude, opposite polarity voltage OUTA with the OUTA of D/A change-over circuit output.The reverse input end that feedback resistance R5 that connects on positive polarity voltage output circuit and overload protecting circuit thereof and reverse voltage output circuit and the overload protecting circuit utilization emitter follower emitter thereof and R8 feed back to output voltage the amplifier input stage; When importing IN+ in the same way and oppositely input IN-have difference; The adjustment output voltage makes it to trend towards stablizing, thereby realizes the adjustment of output voltage.In addition, when the electric current of load was excessive, the electric current that flows through resistance R 4 and R7 also increased; Voltage also increases, thereby makes the optocoupler conducting that is attempted by above it, and the output low level signal is given governor circuit CPU; Turn-off D/A output, make output voltage, prevent that power supply from burning for reducing to 0; After overload is removed, only need to press any key on the lower keyboard, just can return to the magnitude of voltage before transshipping.Keyboard circuit links to each other with P1.0-P1.7 pin of governor circuit CPU; Keyboard circuit is by " increase " and " minimizing " function of the corresponding 1V (AN+, AN-) of 8 buttons, 100mV (BN+, BN-), 10mV (CN+, CN-), 1mV (DN+, DN-); Whenever by next time; Just on the position of correspondence, increase or reduce by shelves, after the user pressed corresponding button, CPU read the data of I/O mouth; With the operational order of judges, governor circuit CPU carries out the output of corresponding control programs control stabilized voltage power supply.In the digital display circuit, the display part is made up of 4 LED charactrons, in order to show the current output voltage value or not transship that display driver is formed by 4 shift register concatenation that seal in and go out respectively.
Claims (10)
1. a digital adjustable two-way is exported the precision DC stabilized voltage power supply; It is made up of unipolarity voltage stabilizing circuit, bipolarity voltage stabilizing circuit, keyboard circuit, governor circuit, digital display circuit, D/A change-over circuit, phase inverter, positive polarity overload protecting circuit, negative polarity overload protecting circuit, positive polarity voltage output circuit, reverse voltage output circuit, it is characterized in that: 3 pin of the output V1 of unipolarity voltage stabilizing circuit are connected with the R21～R28 of keyboard circuit, R31 and the R12 of R32, D/A change-over circuit and 8 pin of U2 of governor circuit respectively; 3 pin of the positive polarity output terminal V2 of bipolarity voltage stabilizing circuit are connected with 7 pin of the U5 of 7 pin of the U4 of 7 pin of the U3 of 1 pin of positive polarity overload protecting circuit GO1, phase inverter, positive polarity voltage output circuit, reverse voltage output circuit respectively; 3 pin of the negative polarity output V3 of bipolarity voltage stabilizing circuit are connected with 1 pin of negative polarity overload protecting circuit GO2 respectively, 4 pin of the U5 of 4 pin of the U4 of 4 pin of the U3 of phase inverter, positive polarity voltage output circuit, reverse voltage output circuit connect; The button AN+ of keyboard circuit, AN-, BN+, BN-, CN+, CN-, DN+, DN-are connected with 1～8 pin of governor circuit U1 successively; 13,14,15 pin of governor circuit U1 are connected with 2,3,1 pin of D/A change-over circuit U2 successively; 10 pin of governor circuit U1 are connected with 1,2 pin of the U10 of digital display circuit; 11 pin of governor circuit U1 are connected with 8 pin of digital display circuit U7～U10 respectively; 39 pin of governor circuit U1 are connected with 3 pin of the GO1 of positive polarity overload protecting circuit, and 38 pin of governor circuit U1 are connected with 3 pin of negative polarity overload protecting circuit GO2; 4 pin of the U2 of D/A change-over circuit are connected with 3 pin of the U4 of positive polarity voltage output circuit and are connected with 2 pin of the U3 of phase inverter through R2; 6 pin of phase inverter U3 are connected with 3 pin of the U5 of reverse voltage output circuit; 2 pin of the GO1 of positive polarity overload protecting circuit are connected with the c pin of the TR1 of positive polarity voltage output circuit; 2 pin of negative polarity overload protecting circuit GO2 are connected with the c pin of the TR2 of reverse voltage output circuit; The e pin of the TR1 of positive polarity voltage output circuit is positive polarity voltage output V+; The e pin of the TR2 of reverse voltage output circuit is reverse voltage output V-.
2. digital adjustable two-way output precision DC stabilized voltage power supply according to claim 1; It is characterized in that: described keyboard circuit is to be made up of button AN+, AN-, BN+, BN-, CN+, CN-, DN+, DN-, R21～R28, and the end of R21～R28 interconnects its other end and is connected with the end of AN+, AN-, BN+, BN-, CN+, CN-, DN+, DN-successively.
3. digital adjustable two-way output precision DC stabilized voltage power supply according to claim 1; It is characterized in that: described governor circuit is to be made up of U1, JT1, C1, C2, C3, R1, R31, R32; The JT1 two ends are connected with 18,19 pin of U1 respectively and respectively through C1, C2 ground connection; The end of R31, R32 interconnects its other end and is connected with 38,39 pin of U1 respectively, and 9 pin of U1 are connected with 3 pin of the V1 of unipolarity voltage stabilizing circuit through R1 ground connection and through C3.
4. digital adjustable two-way output precision DC stabilized voltage power supply according to claim 1; It is characterized in that: described digital display circuit is to be made up of U7～U10, LED1～LED4, R41～R48, R51～R58, R61～R68, R71～R78; 1,2 pin of U7 connect the back and are connected with 13 pin of U8; 1,2 pin of U8 connect the back and are connected with 13 pin of U9; 1,2 pin of U9 connect the back and are connected with 13 pin of U10; 1,2 pin of U10 connect the back and are connected with 10 pin of governor circuit U1; Each of U7～U10 9 pin interconnect, and 8 pin of U7～U10 interconnect the back and are connected with 11 pin of governor circuit U1, and 3,4,5,6,10,11,12,13 pin of U7 are connected with 7,6,4,2,1,9,10,5 pin of LED1 through R41～R48 successively; 3,4,5,6,10,11,12,13 pin of U8 are connected with 7,6,4,2,1,9,10,5 pin of LED2 through R51～R58 successively; 3,4,5,6,10,11,12,13 pin of U9 are connected with 7,6,4,2,1,9,10,5 pin of LED3 through R61～R68 successively, and 3,4,5,6,10,11,12,13 pin of U10 are connected the equal ground connection of 3,8 pin of LED1～LED4 through R71～R78 successively with 7,6,4,2,1,9,10,5 pin of LED4.
5. digital adjustable two-way output precision DC stabilized voltage power supply according to claim 1; It is characterized in that: described D/A change-over circuit is to be made up of U2, U6, R10, R11, R12, C6; 6 pin of U2 are connected with 3 pin of U6 and are connected with 2 pin through C6, and 8 pin of U2 are connected with 3 pin of U6 through R12 and are connected with 1 pin and are connected with 2 pin through R11 through R10.
6. digital adjustable two-way output precision DC stabilized voltage power supply according to claim 1; It is characterized in that: described phase inverter is to be made up of U3, R2, R3, and 2 pin of U3 are connected with its 6 pin through R3 and are connected with 3 pin of the U4 of positive polarity voltage output circuit through R2.
7. digital adjustable two-way output precision DC stabilized voltage power supply according to claim 1; It is characterized in that: described positive polarity overload protecting circuit is to be made up of optocoupler GO1, R4; 1,2 pin of GO1 are connected with R4, and 3 pin connect 39 pin of governor circuit U1,4 pin ground connection.
8. digital adjustable two-way output precision DC stabilized voltage power supply according to claim 1; It is characterized in that: described negative polarity overload protecting circuit is to be made up of optocoupler GO2, R7; 1,2 pin of GO2 are connected with R7, and 3 pin connect 38 pin of governor circuit U1,4 pin ground connection.
9. digital adjustable two-way output precision DC stabilized voltage power supply according to claim 1; It is characterized in that: described positive polarity voltage output circuit is to be made up of U4, TR1, R5, R6, C4; 6 pin of U4 are connected with the b pin of pliotron TR1; 2 pin of U4 are connected with the e pin of TR1 through R5, and the e pin of TR1 is the positive polarity voltage output of D.C. regulated power supply also through R6, C4 ground connection.
10. digital adjustable two-way output precision DC stabilized voltage power supply according to claim 1; It is characterized in that: described reverse voltage output circuit is to be made up of U5, TR2, R8, R9, C5; 6 pin of U5 are connected with the b pin of pliotron TR2; 2 pin of U5 are connected with the e pin of TR2 through R8, and the e pin of TR2 is the reverse voltage output of D.C. regulated power supply also through R9, C5 ground connection.
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| CN201220217488XU CN202565177U (en) | 2012-05-15 | 2012-05-15 | Digital adjustable dual-output precise DC voltage stabilized power supply |
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| CN201220217488XU CN202565177U (en) | 2012-05-15 | 2012-05-15 | Digital adjustable dual-output precise DC voltage stabilized power supply |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103501106A (en) * | 2013-10-15 | 2014-01-08 | 何志刚 | Bipolar output linear regulated power supply |
| CN105892549A (en) * | 2016-03-31 | 2016-08-24 | 成都惠宝节能科技有限公司 | Third-order filtering type insulation board trimming system based on bipolar regulated power supply |
| CN106602899A (en) * | 2016-11-28 | 2017-04-26 | 中核核电运行管理有限公司 | High-performance power supply module used for reactor core nuclear detection system of nuclear power station |
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2012
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103501106A (en) * | 2013-10-15 | 2014-01-08 | 何志刚 | Bipolar output linear regulated power supply |
| CN105892549A (en) * | 2016-03-31 | 2016-08-24 | 成都惠宝节能科技有限公司 | Third-order filtering type insulation board trimming system based on bipolar regulated power supply |
| CN106602899A (en) * | 2016-11-28 | 2017-04-26 | 中核核电运行管理有限公司 | High-performance power supply module used for reactor core nuclear detection system of nuclear power station |
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