CN106026663A - Micro-processing circuit-based linear filter bipolar switching power supply - Google Patents

Micro-processing circuit-based linear filter bipolar switching power supply Download PDF

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Publication number
CN106026663A
CN106026663A CN201610410196.0A CN201610410196A CN106026663A CN 106026663 A CN106026663 A CN 106026663A CN 201610410196 A CN201610410196 A CN 201610410196A CN 106026663 A CN106026663 A CN 106026663A
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China
Prior art keywords
pole
resistance
polar capacitor
circuit
audion
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CN201610410196.0A
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Chinese (zh)
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不公告发明人
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Chengdu Juhuicai Technology Co Ltd
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Chengdu Juhuicai Technology Co Ltd
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Priority to CN201610410196.0A priority Critical patent/CN106026663A/en
Publication of CN106026663A publication Critical patent/CN106026663A/en
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/14—Arrangements for reducing ripples from dc input or output
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M3/00—Conversion of dc power input into dc power output
    • H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
    • H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
    • H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
    • H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
    • H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
    • H02M3/33507—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of the output voltage or current, e.g. flyback converters
    • H02M3/33523—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of the output voltage or current, e.g. flyback converters with galvanic isolation between input and output of both the power stage and the feedback loop

Abstract

The invention discloses a micro-processing circuit-based linear filter bipolar switching power supply. The micro-processing circuit-based linear filter bipolar switching power supply is characterized by mainly comprising a control chip U1, a transformer T, a reference voltage circuit, a triode VT1, a diode D1, a polar capacitor C7, a linear filter circuit, a micro-processing circuit, a voltage regulating circuit, a switch control circuit and the like, wherein the linear filter circuit is connected between the reference voltage circuit and a dotted terminal of a primary induction coil L2 of the transformer T in series; the micro-processing circuit is connected between the reference voltage circuit and a primary induction coil L1 of the transformer T in series; the voltage regulating circuit is connected between the reference voltage circuit and a VCC pin of the control chip U1 in series; and the switch control circuit is connected with an OUT pin and an I pin of the control chip U1 separately. According to the micro-processing circuit-based linear filter bipolar switching power supply, input voltage can be automatically adjusted; and the condition that the micro-processing circuit-based linear filter bipolar switching power supply can output stable voltage is effectively ensured, so that the detection accuracy on various functions of a battery protection circuit board is improved.

Description

A kind of linear filtering formula bipolarity Switching Power Supply based on micro-processor interface circuit
Technical field
The present invention relates to electronic applications, specifically, be that a kind of linear filtering formula based on micro-processor interface circuit is double Polarity switch power supply.
Background technology
At present, battery manufacturer is typically necessary after having made battery protection circuit and comes with bipolar power supply The various functions detecting this battery protection circuit is the most up to standard, i.e. uses bipolar power supply to realize right The overvoltage of battery protection circuit, quickly calibrated and test under-voltage, stream excessively.So-called bipolar power supply is Refer to that during this corona discharge, the electric current of its power source internal is to flow to positive pole from negative pole, and to its electricity during this power source charges Electric current within source is to flow to negative pole from positive pole (no matter its internal electric current of traditional common power is in what feelings All can only flow to positive pole from negative pole under condition, and negative pole can not be flowed to from positive pole).But, institute the most on the market The bipolar power supply sold exists for the problem of piezoelectric voltage unstable properties, thus causes battery protecting circuit The various functions detection of plate is inaccurate, has had a strong impact on using and promoting of its profound level.
Therefore it provides the stable bipolar power supply of a kind of power supply performance is the task of top priority.
Summary of the invention
It is an object of the invention to overcome bipolar power supply of the prior art to exist for unstable the lacking of electrical property Fall into, it is provided that a kind of based on micro-processor interface circuit linear filtering formula bipolarity Switching Power Supply.
The present invention is achieved through the following technical solutions: a kind of linear filtering formula based on micro-processor interface circuit is bipolar Property Switching Power Supply, mainly by control chip U1, transformator T, reference voltage circuit, audion VT1, N Pole AO pin with control chip U1 after resistance R11 is connected, the base stage of P pole and audion VT1 The diode D1 being connected, positive pole colelctor electrode with audion VT1 after resistance R12 is connected, negative pole Polar capacitor C7, the P pole of ground connection is connected with the non-same polarity of transformator T secondary inductance coil L3, N The diode D5 that pole Same Name of Ends with transformator T secondary inductance coil L3 after polar capacitor C6 is connected, Be serially connected in the voltage-regulating circuit between the VCC pin of reference voltage circuit and control chip U1, one end with The resistance R8 that VCC pin is connected, the other end is connected with voltage-regulating circuit of control chip U1, string It is connected on the linear filtering circuit between the Same Name of Ends of reference voltage circuit and transformator T former limit inductance coil L2, It is serially connected in the micro-processor interface circuit between reference voltage circuit and the former limit inductance coil L1 of transformator T, Yi Jifen The ON-OFF control circuit composition not being connected with OUT pin and the I pin of control chip U1；Described three poles The emitter stage of pipe VT1 is connected with reference voltage circuit respectively with control chip U1；Described on-off control electricity The non-same polarity of limit former with transformator T, road inductance coil L2 is connected；The GND of described control chip U1 Pin and the equal ground connection of RC pin.
The transmitting of described linear filtering electricity routing amplifier P2, audion VT5, one end and audion VT5 Pole is connected, the resistance R39 of the other end and ground connection, negative pole is connected with the electrode input end of amplifier P2, The polar capacitor C14 that positive pole is connected with the base stage of audion VT5, positive pole inputs with the positive pole of amplifier P2 End is connected, the polar capacitor C13 of ground connection after negative pole resistance R32, positive pole after inductance L5 with amplifier The pole that the electrode input end of P2 is connected, negative pole outfan with amplifier P2 after resistance R37 is connected Property electric capacity C15, P pole colelctor electrode with audion VT5 after resistance R33 is connected, N pole is through resistance R38 Diode D10, the N pole that negative pole with polar capacitor C15 is connected afterwards after resistance R36 with amplifier P2 The diode that outfan is connected, P pole negative input with amplifier P2 after resistance R34 is connected D11, and positive pole N pole with diode D11 after resistance R35 is connected, negative pole and amplifier P2 Negative input be connected after ground connection polar capacitor C16 composition；The electrode input end of described amplifier P2 As the input of linear filtering circuit and it is connected with reference voltage circuit；The outfan of described amplifier P2 The Same Name of Ends of limit inductance coil L2 former with transformator T is connected.
Described voltage-regulating circuit by voltage stabilizing chip U2, audion VT4, positive pole after resistance R22 with steady Pressure chip U2 VIN pin be connected, negative pole as voltage-regulating circuit input and and reference voltage The polar capacitor C10 that circuit is connected, positive pole sequentially after resistance R23 and resistance R24 with polar capacitor C10 The polarity electricity that positive pole is connected, negative pole ADJ pin with voltage stabilizing chip U2 after resistance R25 is connected Holding C11, one end is connected with the ADJ pin of control chip U2, the base stage of the other end and audion VT4 The adjustable resistance R26 being connected, positive pole VOUT pin with voltage stabilizing chip U2 after resistance R27 is connected Connect, polar capacitor C12, P pole that negative pole is connected with the emitter stage of audion VT4 after resistance R30 with The positive pole of polar capacitor C12 is connected, N pole colelctor electrode with audion VT4 after resistance R28 is connected Diode D9, P pole be connected with the positive pole of polar capacitor C12, N pole after resistance R29 with diode The Zener diode D8 that the N pole of D9 is connected, and P pole after resistance R21 with polar capacitor C10's The diode D7 group that positive pole is connected, N pole is connected with the P pole of Zener diode D8 after resistance R31 Become；The N pole of described diode D9 be connected with the negative pole of polar capacitor C11 after ground connection；Described voltage stabilizing two The N pole of pole pipe D8 as the outfan of voltage-regulating circuit and after resistance R8 with control chip U1's VCC pin is connected.
Described reference voltage circuit by amplifier P1, audion VT2, negative pole after resistance R3 with audion The polar capacitor that the base stage of VT2 is connected, positive pole anelectrode with amplifier P1 after resistance R1 is connected C3, positive pole emitter stage with audion VT2 after resistance R7 is connected, the positive pole of negative pole and amplifier P1 The polar capacitor C5 that input is connected, negative pole negative input with amplifier P1 after resistance R6 is connected Connect, polar capacitor C2 that positive pole is connected with the RC pin of control chip U1 after resistance R13, negative pole After resistance R2, the outfan with amplifier P1 is connected, positive pole is connected with the emitter stage of audion VT1 Polar capacitor C1, one end is connected with the negative pole of polar capacitor C1, the transmitting of the other end and audion VT1 The resistance R9 that pole is connected, and one end is connected with the negative pole of polar capacitor C11, the other end and control core The resistance R10 composition that the AO pin of sheet U1 is connected；The negative electrode ground connection of described amplifier P；Described three The grounded collector of pole pipe VT2, its emitter stage is connected with the negative pole of polar capacitor C10；Described control core The VR pin of sheet U1 is connected with the positive pole of polar capacitor C2；The anelectrode of described amplifier P1 and polarity The positive pole of electric capacity C1 is collectively forming the input of reference voltage circuit；The electrode input end of described amplifier P1 It is connected with micro-processor interface circuit.
Described ON-OFF control circuit is by field effect transistor MOS, and audion VT3, P pole is through adjustable resistance R14 Be connected with the grid of field effect transistor MOS afterwards, N pole is connected with the OUT pin of control chip U1 Diode D3, negative pole is connected with the source electrode of field effect transistor MOS, positive pole after resistance R15 with control core The polar capacitor C9 that the I pin of sheet U1 is connected, positive pole is connected with the I pin of control chip U1, bears The polar capacitor C8 of pole ground connection, one end is connected with the source electrode of field effect transistor MOS, the other end and audion Resistance R16, the N pole that the base stage of VT3 is connected is connected with the drain electrode of field effect transistor MOS, P pole is through electricity Zener diode D4, the N pole being connected with the emitter stage of audion VT3 after resistance R17 is after resistance R20 Be connected with the Same Name of Ends of transformator T secondary inductance coil L3, P pole after resistance R18 with audion VT3 The Zener diode D6 that is connected of emitter stage, and one end is connected, separately with the negative pole of polar capacitor C6 The resistance R19 composition that one end is connected with the P pole of Zener diode D6；The current collection of described audion VT3 Pole ground connection；The non-same polarity of the drain electrode of field effect transistor MOS limit former with transformator T inductance coil L2 is connected.
Described micro-processor interface circuit is by N pole limit inductance coil L1 former with transformator T of the same name after resistance R5 The diode D2 that end is connected, P pole electrode input end with amplifier P1 after resistance R4 is connected, one End be connected with the electrode input end of amplifier P1, other end limit former with transformator T inductance coil L1 same The name inductance L4 that is connected of end, and positive pole is connected with the P pole of diode D2, negative pole and transformator T The polar capacitor C4 composition that the non-same polarity of former limit inductance coil L1 is connected.
For the practical effect of the present invention, described control chip U1 the most preferentially uses UC3845 integrated Chip realizes；The most described voltage stabilizing chip U2 the most preferentially have employed the integrated chip of LM317T and realizes.
The present invention compared with prior art, has the following advantages and beneficial effect:
(1) voltage of input can be automatically adjusted by the present invention, effectively ensure that the present invention can export surely Fixed voltage, thus improve the accuracy that the various functions of battery protection circuit is detected by the present invention.
(2) ripple voltage in voltage can be suppressed by the present invention, is effectively controlled by ripple voltage Within 0.004%, ensure that the present invention can export burning voltage.
(3) voltage pulsation of input can be adjusted by the present invention, makes voltage keep stable, ensures that The present invention can export stable voltage.
(4) control chip of the present invention have employed the integrated core of UC3845, this chip have blood pressure lowering, voltage stabilizing, Programmable current limits and the function of overcurrent protection, ensures that the present invention can export stable electricity Pressure.
Accompanying drawing explanation
Fig. 1 is the overall structure schematic diagram of the present invention.
Fig. 2 is the electrical block diagram of the voltage-regulating circuit of the present invention.
Fig. 3 is the electrical block diagram of the linear filtering circuit of the present invention.
Detailed description of the invention
Below in conjunction with embodiment and accompanying drawing thereof, the present invention is described in further detail, but the enforcement of the present invention Mode is not limited to this.
Embodiment
As it is shown in figure 1, the present invention is mainly by control chip U1, transformator T, reference voltage circuit, three poles Pipe VT1, N pole AO pin with control chip U1 after resistance R11 is connected, P pole and audion The diode D1 that the base stage of VT1 is connected, positive pole after resistance R12 with the colelctor electrode phase of audion VT1 Connection, polar capacitor C7, the P pole of minus earth and the non-same polarity of transformator T secondary inductance coil L3 Be connected, N pole Same Name of Ends with transformator T secondary inductance coil L3 after polar capacitor C6 is connected Diode D5, the Voltage Cortrol being serially connected between the VCC pin of reference voltage circuit and control chip U1 electricity Road, one end is connected with the VCC pin of control chip U1, the other end is connected with voltage-regulating circuit Resistance R8, is serially connected in the line between the Same Name of Ends of reference voltage circuit and transformator T former limit inductance coil L2 Property filter circuit, is serially connected in the micro-process between reference voltage circuit and the former limit inductance coil L1 of transformator T Circuit, and the ON-OFF control circuit group being connected with OUT pin and the I pin of control chip U1 respectively Become；The emitter stage of described audion VT1 is connected with reference voltage circuit respectively with control chip U1；Institute The non-same polarity stating ON-OFF control circuit limit former with transformator T inductance coil L2 is connected；Described control chip The GND pin of U1 and the equal ground connection of RC pin.
Wherein, described reference voltage circuit by amplifier P1, audion VT2, resistance R1, resistance R2, Resistance R3, resistance R6, resistance R7, resistance R9, resistance R10, resistance R13, polar capacitor C1, Polar capacitor C2, polar capacitor C3, and polar capacitor C5 form.
During connection, the negative pole of polar capacitor C3 base stage with audion VT2 after resistance R3 is connected, Its positive pole anelectrode with amplifier P1 after resistance R1 is connected.The positive pole of polar capacitor C5 is through resistance After R7, the emitter stage with audion VT2 is connected, its negative pole is connected with the electrode input end of amplifier P1.
Meanwhile, the negative pole of polar capacitor C2 negative input with amplifier P1 after resistance R6 be connected, Its positive pole RC pin with control chip U1 after resistance R13 is connected.The negative electricity of polar capacitor C1 Be connected with the outfan of amplifier P1 after resistance R2, its positive pole is connected with the emitter stage of audion VT1. One end of resistance R9 is connected with the negative pole of polar capacitor C1, the emitter stage of its other end and audion VT1 It is connected.One end of resistance R10 is connected with the negative pole of polar capacitor C11, its other end and control chip The AO pin of U1 is connected.
The negative electrode ground connection of described amplifier P；The grounded collector of described audion VT2, its emitter stage with The negative pole of polar capacitor C10 is connected；The VR pin of described control chip U1 is with polar capacitor C2 just Pole is connected；The anelectrode of described amplifier P1 and the positive pole of polar capacitor C1 are collectively forming reference voltage electricity The input on road；The electrode input end of described amplifier P1 be connected with micro-processor interface circuit and with external power source phase Connect.
Further, described ON-OFF control circuit is by field effect transistor MOS, audion VT3, adjustable resistance R14, resistance R15, resistance R16, resistance R17, resistance R18, resistance R19, resistance R20, polarity Electric capacity C8, polar capacitor C9, diode D3, Zener diode D4, and Zener diode D6 form.
During connection, the P pole of diode D3 after adjustable resistance R14 with the grid phase of field effect transistor MOS Connect, its N pole is connected with the OUT pin of control chip U1.The negative pole of polar capacitor C9 is imitated with field Should the source electrode of pipe MOS be connected, its positive pole I pin with control chip U1 after resistance R15 is connected. Polar capacitor C8 positive pole is connected with the I pin of control chip U1, its minus earth.The one of resistance R16 End is connected with the source electrode of field effect transistor MOS, its other end is connected with the base stage of audion VT3.
Meanwhile, the N pole of Zener diode D4 be connected with the drain electrode of field effect transistor MOS, its P pole warp After resistance R17, the emitter stage with audion VT3 is connected.The N pole of Zener diode D6 is through resistance R20 Afterwards the Same Name of Ends with transformator T secondary inductance coil L3 be connected, its P pole after resistance R18 with three poles The emitter stage of pipe VT3 is connected, and one end of resistance R19 is connected with the negative pole of polar capacitor C6, it The other end is connected with the P pole of Zener diode D6.The grounded collector of described audion VT3；Field effect Should the non-same polarity of drain electrode limit former with transformator T inductance coil L2 of pipe MOS be connected.
Further, described micro-processor interface circuit by resistance R4, resistance R5, diode D2, inductance L4, And polar capacitor C4 composition.
During connection, the N pole of diode D2 limit inductance coil L1 former with transformator T same after resistance R5 Name end is connected, its P pole electrode input end with amplifier P1 after resistance R4 is connected.Inductance L4 One end be connected with the electrode input end of amplifier P1, its other end and transformator T former limit inductance coil The Same Name of Ends of L1 is connected.The positive pole of polar capacitor C4 is connected with the P pole of diode D2, its negative pole with The non-same polarity of transformator T former limit inductance coil L1 is connected.
As in figure 2 it is shown, described voltage-regulating circuit is by voltage stabilizing chip U2, audion VT4, resistance R21, Resistance R22, resistance R23, resistance R24, resistance R25, adjustable resistance R26, resistance R27, resistance R28, resistance R29, resistance R30, resistance R31, polar capacitor C10, polar capacitor C11, polarity electricity Hold C12, diode D7, diode D8, and diode D9 composition.
During connection, the positive pole of polar capacitor C10 after resistance R22 with the VIN pin phase of voltage stabilizing chip U2 Connect, its negative pole as the input of voltage-regulating circuit and is connected with reference voltage circuit.Polar capacitor The positive pole of C11 is sequentially connected through resistance R23 positive pole with polar capacitor C10 after resistance R24, it is born Pole ADJ pin with voltage stabilizing chip U2 after resistance R25 is connected.One end of adjustable resistance R26 and control The ADJ pin of coremaking sheet U2 is connected, its other end is connected with the base stage of audion VT4.
Meanwhile, the positive pole of polar capacitor C12 after resistance R27 with the VOUT pin phase of voltage stabilizing chip U2 Connect, its negative pole is connected with the emitter stage of audion VT4.The P pole of diode D9 is after resistance R30 Be connected with the positive pole of polar capacitor C12, its N pole after resistance R28 with the colelctor electrode phase of audion VT4 Connect.The P pole of Zener diode D8 is connected with the positive pole of polar capacitor C12, its N pole is through resistance R29 It is connected with the N pole of diode D9 afterwards.The P pole of diode D7 after resistance R21 with polar capacitor C10 Positive pole be connected, P pole with Zener diode D8 after resistance R31, its N pole is connected.
The N pole of described diode D9 be connected with the negative pole of polar capacitor C11 after ground connection；Described voltage stabilizing two The N pole of pole pipe D8 as the outfan of voltage-regulating circuit and after resistance R8 with control chip U1's VCC pin is connected.
As it is shown on figure 3, described linear filtering electricity routing amplifier P2, audion VT5, resistance R32, electricity Resistance R33, resistance R34, resistance R35, resistance R36, resistance R37, resistance R38, resistance R39, pole Property electric capacity C13, polar capacitor C14, polar capacitor C15, polar capacitor C16, diode D10, two poles Pipe D11, and inductance L5 composition.
During connection, one end of resistance R39 is connected with the emitter stage of audion VT5, its other end with connect Ground.The negative pole of polar capacitor C14 is connected with the electrode input end of amplifier P2, its positive pole and audion The base stage of VT5 is connected.The positive pole of polar capacitor C13 is connected with the electrode input end of amplifier P2, it Ground connection after negative pole resistance R32.The positive pole of polar capacitor C15 is defeated with the positive pole of amplifier P2 after inductance L5 Enter that end is connected, its negative pole outfan with amplifier P2 after resistance R37 is connected.
Meanwhile, the P pole of diode D10 colelctor electrode with audion VT5 after resistance R33 be connected, Its N pole negative pole with polar capacitor C15 after resistance R38 is connected.The N pole of diode D11 is through electricity Be connected with the outfan of amplifier P2 after resistance R36, its P pole negative with amplifier P2 after resistance R34 Pole input is connected.The positive pole of polar capacitor C16 N with diode D11 after resistance R35 is extremely connected Connect, its negative pole be connected with the negative input of amplifier P2 after ground connection.
The electrode input end of described amplifier P2 as linear filtering circuit input and with reference voltage electricity Road is connected；The Same Name of Ends of outfan limit former with the transformator T inductance coil L2 of described amplifier P2 is connected Connect.
During operation, the voltage of input can be automatically adjusted by the present invention, and the present invention can also be to the electricity of input Pressure fluctuation is adjusted, and makes voltage keep stable, thus improves each to battery protection circuit of the present invention The accuracy of item Function detection.Ripple voltage in voltage can be suppressed by the present invention, effectively by ripple Control of Voltage, within 0.004%, ensures that the present invention can export burning voltage.Meanwhile, the present invention Control chip have employed the integrated core of UC3845, this chip have blood pressure lowering, voltage stabilizing, programmable current limit, with And the function of overcurrent protection, ensure that the present invention can export stable voltage.In order to preferably implement The present invention, described voltage stabilizing chip U2 the most preferentially have employed the integrated chip of LM317T and realizes.
According to above-described embodiment, can well realize the present invention.

Claims (7)

1. a linear filtering formula bipolarity Switching Power Supply based on micro-processor interface circuit, it is characterised in that main Will be by control chip U1, transformator T, reference voltage circuit, audion VT1, N pole is after resistance R11 Be connected with the AO pin of control chip U1, diode that P pole is connected with the base stage of audion VT1 D1, positive pole colelctor electrode with audion VT1 after resistance R12 is connected, the polar capacitor of minus earth C7, P pole is connected with the non-same polarity of transformator T secondary inductance coil L3, N pole is through polar capacitor C6 The diode D5 that Same Name of Ends with transformator T secondary inductance coil L3 is connected afterwards, is serially connected in reference voltage Voltage-regulating circuit between the VCC pin of circuit and control chip U1, one end is with control chip U1's The resistance R8 that VCC pin is connected, the other end is connected with voltage-regulating circuit, is serially connected in reference voltage electricity Linear filtering circuit between the Same Name of Ends of road and transformator T former limit inductance coil L2, is serially connected in reference voltage Micro-processor interface circuit between circuit and the former limit inductance coil L1 of transformator T, and respectively with control chip The ON-OFF control circuit composition that the OUT pin of U1 is connected with I pin；The transmitting of described audion VT1 Pole is connected with reference voltage circuit respectively with control chip U1；Described ON-OFF control circuit is former with transformator T The non-same polarity of limit inductance coil L2 is connected；GND pin and the RC pin of described control chip U1 are equal Ground connection.
A kind of linear filtering formula bipolarity based on micro-processor interface circuit the most according to claim 1 switchs Power supply, it is characterised in that described linear filtering electricity routing amplifier P2, audion VT5, one end and three poles The emitter stage of pipe VT5 is connected, the resistance R39 of the other end and ground connection, and negative pole is defeated with the positive pole of amplifier P2 Enter the polar capacitor C14 that end is connected, positive pole is connected, positive pole and amplifier with the base stage of audion VT5 The electrode input end of P2 is connected, the polar capacitor C13 of ground connection after negative pole resistance R32, and positive pole is through inductance L5 Afterwards the electrode input end with amplifier P2 be connected, negative pole after resistance R37 with the outfan of amplifier P2 Polar capacitor C15, the P pole being connected colelctor electrode with audion VT5 after resistance R33 is connected, N Diode D10, the N pole that pole negative pole with polar capacitor C15 after resistance R38 is connected is through resistance R36 Afterwards the outfan with amplifier P2 be connected, P pole after resistance R34 with the negative input of amplifier P2 The diode D11 being connected, and positive pole N pole with diode D11 after resistance R35 be connected, negative Pole be connected with the negative input of amplifier P2 after ground connection polar capacitor C16 composition；Described amplifier The electrode input end of P2 as the input of linear filtering circuit and is connected with reference voltage circuit；Described put The Same Name of Ends of outfan limit former with the transformator T inductance coil L2 of big device P2 is connected.
A kind of linear filtering formula bipolarity based on micro-processor interface circuit the most according to claim 2 switchs Power supply, it is characterised in that described voltage-regulating circuit is by voltage stabilizing chip U2, and audion VT4, positive pole is through electricity Be connected with the VIN pin of voltage stabilizing chip U2 after resistance R22, negative pole is as the input of voltage-regulating circuit And the polar capacitor C10 being connected with reference voltage circuit, positive pole is sequentially after resistance R23 and resistance R24 Be connected with the positive pole of polar capacitor C10, negative pole after resistance R25 with the ADJ pin of voltage stabilizing chip U2 The polar capacitor C11 being connected, one end is connected with the ADJ pin of control chip U2, the other end and three The adjustable resistance R26 that the base stage of pole pipe VT4 is connected, positive pole after resistance R27 with voltage stabilizing chip U2's Polar capacitor C12, the P pole that VOUT pin is connected, negative pole is connected with the emitter stage of audion VT4 After resistance R30 the positive pole with polar capacitor C12 be connected, N pole after resistance R28 with audion VT4 Diode D9, the P pole that is connected of colelctor electrode be connected with the positive pole of polar capacitor C12, N pole is through resistance The Zener diode D8 being connected with the N pole of diode D9 after R29, and P pole after resistance R21 with The positive pole of polar capacitor C10 is connected, N pole P with Zener diode D8 after resistance R31 is extremely connected The diode D7 composition connect；The N pole of described diode D9 is connected with the negative pole of polar capacitor C11 and is followed by Ground；The N pole of described Zener diode D8 as the outfan of voltage-regulating circuit and after resistance R8 with control The VCC pin of coremaking sheet U1 is connected.
A kind of linear filtering formula bipolarity based on micro-processor interface circuit the most according to claim 3 switchs Power supply, it is characterised in that described reference voltage circuit is by amplifier P1, and audion VT2, negative pole is through resistance After R3 the base stage with audion VT2 be connected, positive pole after resistance R1 with the anelectrode phase of amplifier P1 The polar capacitor C3 connected, positive pole emitter stage with audion VT2 after resistance R7 is connected, negative pole with The polar capacitor C5 that the electrode input end of amplifier P1 is connected, negative pole after resistance R6 with amplifier P1 The pole that negative input is connected, positive pole is connected with the RC pin of control chip U1 after resistance R13 Property electric capacity C2, after negative pole resistance R2 the outfan with amplifier P1 be connected, positive pole and audion VT1 The polar capacitor C1 that is connected of emitter stage, one end is connected with the negative pole of polar capacitor C1, the other end with The resistance R9 that the emitter stage of audion VT1 is connected, and one end is connected with the negative pole of polar capacitor C11, The resistance R10 composition that the other end is connected with the AO pin of control chip U1；The negative electricity of described amplifier P Pole ground connection；The grounded collector of described audion VT2, its emitter stage is connected with the negative pole of polar capacitor C10 Connect；The VR pin of described control chip U1 is connected with the positive pole of polar capacitor C2；Described amplifier P1 The positive pole of anelectrode and polar capacitor C1 be collectively forming the input of reference voltage circuit；Described amplifier The electrode input end of P1 is connected with micro-processor interface circuit.
A kind of linear filtering formula bipolarity based on micro-processor interface circuit the most according to claim 4 switchs Power supply, it is characterised in that described ON-OFF control circuit is by field effect transistor MOS, audion VT3, P pole warp After adjustable resistance R14 the grid with field effect transistor MOS be connected, the OUT pipe of N pole and control chip U1 The diode D3 that foot is connected, negative pole is connected with the source electrode of field effect transistor MOS, positive pole is through resistance R15 The I pin of the polar capacitor C9 being connected with the I pin of control chip U1 afterwards, positive pole and control chip U1 Be connected, the polar capacitor C8 of minus earth, one end is connected with the source electrode of field effect transistor MOS, another Hold resistance R16, the N pole being connected with the base stage of audion VT3 to be connected with the drain electrode of field effect transistor MOS, Zener diode D4, the N pole that P pole emitter stage with audion VT3 after resistance R17 is connected is through resistance After R20 the Same Name of Ends with transformator T secondary inductance coil L3 be connected, P pole after resistance R18 with three poles The Zener diode D6 that the emitter stage of pipe VT3 is connected, and one end is connected with the negative pole of polar capacitor C6 Connect, resistance R19 that the other end is connected with the P pole of Zener diode D6 composition；Described audion VT3 Grounded collector；The drain electrode of field effect transistor MOS and the non-same polarity of transformator T former limit inductance coil L2 It is connected.
A kind of linear filtering formula bipolarity based on micro-processor interface circuit the most according to claim 5 switchs Power supply, it is characterised in that described micro-processor interface circuit is by N pole limit former with transformator T inductance after resistance R5 The Same Name of Ends of coil L1 is connected, P pole electrode input end with amplifier P1 after resistance R4 is connected Diode D2, one end is connected with the electrode input end of amplifier P1, the other end is electric with the former limit of transformator T The inductance L4 that is connected of Same Name of Ends of sense coil L1, and positive pole is connected with the P pole of diode D2, bear The polar capacitor C4 composition that the non-same polarity of limit former with transformator T, pole inductance coil L1 is connected.
A kind of linear filtering formula bipolarity based on micro-processor interface circuit the most according to claim 6 switchs Power supply, it is characterised in that described control chip U1 is the integrated chip of UC3845；Described voltage stabilizing chip U2 Then have employed the integrated chip of LM317T.
CN201610410196.0A 2016-06-12 2016-06-12 Micro-processing circuit-based linear filter bipolar switching power supply Pending CN106026663A (en)

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Application Number Priority Date Filing Date Title
CN201610410196.0A CN106026663A (en) 2016-06-12 2016-06-12 Micro-processing circuit-based linear filter bipolar switching power supply

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Application publication date: 20161012