CN2525727Y - Wide voltage low power consumption switch power source of waiting machine - Google Patents

Wide voltage low power consumption switch power source of waiting machine Download PDF

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Publication number
CN2525727Y
CN2525727Y CN 01277047 CN01277047U CN2525727Y CN 2525727 Y CN2525727 Y CN 2525727Y CN 01277047 CN01277047 CN 01277047 CN 01277047 U CN01277047 U CN 01277047U CN 2525727 Y CN2525727 Y CN 2525727Y
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CN
China
Prior art keywords
resistance
power source
voltage
rectifier
filter capacitor
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Expired - Fee Related
Application number
CN 01277047
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Chinese (zh)
Inventor
欧振忠
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Individual
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Individual
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Priority to CN 01277047 priority Critical patent/CN2525727Y/en
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Publication of CN2525727Y publication Critical patent/CN2525727Y/en
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Expired - Fee Related legal-status Critical Current

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  • Rectifiers (AREA)
  • Inverter Devices (AREA)

Abstract

The utility model relates to a wide voltage low power consumption switch power source of waiting machine, wherein, a isolating diode D5 in a voltage regulator circuit is serially connected between a sampling tube DW1 and a filter capacitor C2; one end of a switch device Q3 is connected with a high frequency transformer coil N1 and a capacitor C3, while the other end of the switch device Q3 is connected with a temperature compensation resistance Rt and a current sampling resistance R7 and connected with the base electrode of a switch device Q2 via a resistance R8; a control electrode of the switch device Q3 is connected with a collector electrode starting the resistance R5 and Q2; a coil N3, a rectifier D6, filter capacitors C5, C6, a resistance R9 and a voltage stabilizing device DW2 form the circuit output for CPU power source; a coil N4, a rectifier D7 and a filter capacitor C7 form the circuit output for main switch power source to start and control. The switch power source of waiting machine is extremely little in power consumption, constant in power output, little in power dissipation, safe, reliable, low in manufacture cost and suitable for various electric appliances.

Description

Wide voltage low-power consumption standby Switching Power Supply
Technical field
The utility model belongs to small-power standby switches field of power supplies.
Background technology
Existing standby switches power supply, electricity consumption is generally 100-200mw, but the standby total power consumption reaches 1-20w, and operating voltage range is little, and standby safety is poor.As use transformer stand-by circuit power consumption big, heavy and perishable; Also big with RCC Switching Power Supply power consumption, in colour TV, reach 1.5～3w.Other is also all very big as frequency reducing standby power power consumption, and there is serious potential safety hazard in the power supply level shifter circuit.
Summary of the invention
The technical problems to be solved in the utility model is to reduce the power consumption of standby power significantly, and increases its function of use scope.Standby switches power supply of the present utility model solves the problems of the technologies described above with following technical scheme: in voltage stabilizing circuit, and isolating diode D 5Be connected on probe tube DW 1Negative electrode and filter capacitor C 2Between; Switching device Q 3An end and with high-frequency transformer coils N 1Capacitor C 3Connect the other end and thermo-compensator Rt, current sampling resistor R 7Connect, simultaneously through resistance R 8With switching device Q 2Base stage connect Q 3The control utmost point meets Q 2Collector electrode and through resistance R 5With coil N 1Forward end connects; Coil N 3Backward end and rectifier D 6Anode connects, D 6Negative electrode and filter capacitor C 5, C 6Positive pole, voltage-stabilizing device DW 2Positive pole join, at C 5And C 6Between be connected to resistance R 9, coil N 4Forward end and rectifier D 7Anode connects, D 7Negative electrode and filter capacitor C 7The anodal connection.
Standby switches power supply of the present utility model can high efficiency use in as the wide-voltage range of AC80～400v, and for example output is 5v * 40m for CPU power A=200mw and startup are 20 with power v* 2m ADuring=40mw, total power consumption also can provide multiple different independent current source less than 500mw, can be used for remote-control master switch mains switch machine simultaneously and be used for low pressure, overvoltage protection power supply.Because this switching power circuit is designed to permanent power output, need not voltage negative feedback circuit, has also improved functional reliability,, can not cause the cpu system large tracts of land to damage even voltage stabilizing circuit lost efficacy yet.Circuit element all can be made into a module in the colour TV standby power, area occupied is minimum, and cost is also very low.The utility model switch standby power also can be used with multiple Switching Power Supply, realizes dc switch machine or alternating-current switch machine.
Description of drawings
Fig. 1 is the utility model standby switches power principle block diagram.
Fig. 2 is the utility model standby switches power supply main circuit figure.
Embodiment
Rectifier D 1～D 4One end and current-limiting resistance R 2, fuse RD polyphone, another termination AC capacitor C 1With discharge resistance R 1The output cathode of rectifier and switching device Q 1Upper end, probe tube DW 1Negative electrode, isolating diode D 5, filter capacitor C 2Positive pole, starting resistance R 5One end, capacitor C 3With high-frequency transformer coils N 1Forward end connects; Rectifier D 1～D 4Output negative pole and switching device Q 2Emitter, Q 1Lower end, resistance R 4, Rt, R 7Lower end, coil N 2Backward end, capacitor C 2Negative pole join.At DW 1And C 2Between isolating diode D is arranged 5The current-limiting protection resistance R 3With DW 1Series connection back and switching device Q 1The control utmost point, resistance R 4Connect.
Switching device Q 3A termination capacitor C 3With coil N 1, the other end and thermo-compensator Rt, current sampling resistor R in parallel 7Connect, the control utmost point meets Q 2Collector electrode and through resistance R 5With coil N 1Forward end connects; Q 2Base stage through resistance R 8Connect Q 3One end and Rt and R 7, the coil N of high frequency transformer 4Forward end and rectifier D 7Polyphone back and filter capacitor C 7The anodal connection.N 4Backward end and C 7Negative pole connects.Coil N 3Backward end and rectifier D 6Polyphone back and filter capacitor C 5Anodal, filter capacitor C 6Positive pole and voltage-stabilizing device DW 2Positive pole link C 5And C 6Between string resistance R arranged 9N 3Forward end and C 5, C 6Negative pole and DW 2Negative pole link.
After inserting power supply, electric current is through fuse RD, current-limiting resistance R 2And AC capacitor C 1With discharge resistance R 1After the step-down, through rectifier D 1～D 4Rectification enters by switching device Q again 1, probe tube DW 1, the current-limiting protection resistance R 3, anti-false triggering resistance R 4, isolating diode D 5, filter C 2The voltage stabilizing circuit voltage regulation filtering of forming obtains stable low-voltage dc voltage output.Work as D 5Anode voltage is lower than DW 1During conducting voltage, DW 1, R 3, R 4, Q 1No power consumption has only D 5Very little forward conduction loss is arranged.Work as D 5Anode voltage raises, DW 1When being conducting to a certain degree, Q 1Conducting, D at this moment 5, DW 1, R 3, R 4All do not have electric energy loss, have only Q 1Very little conduction loss is arranged.Because of DW 1ON time is very short, so DW 1, R 3, R 4Loss all can ignore, so the voltage stabilizing circuit power consumption is minimum.Switching device Q 3Control circuit by Q 2And R 8Form.Current sampling resistor R 7Participate in the control of control circuit with thermistor Rt.Be in coil N 2Forward end and Q 3Capacitance C between the control utmost point 4And resistance R 6Formed exciting circuit, made R 5When starting, reach little power consumption.Electric current after the voltage stabilizing is through the filtering capacitor C 2, suppress capacitor C 3Arrive high-frequency transformer coils N 1And connection switching device Q 3Above circuit constitutes constant-power control circuit.By high-frequency transformer coils N 3, rectifier D 6, filter capacitor C 5, C 6, R 9, voltage-stabilizing device DW 2The voltage stabilizing circuit of forming constitutes one the tunnel and is output as V 01, use for CPU, by high-frequency transformer coils N 4, rectifier D 7, filter capacitor C 7Constitute another road output V 02Use for main switch power initiation and control.

Claims (3)

1, a kind of wide voltage low power standby Switching Power Supply has circuit such as step-down, rectification, voltage stabilizing, filtering, high frequency conversion, output, it is characterized in that isolating diode D in voltage stabilizing circuit 5Be connected on probe tube DW 1Negative electrode and filter capacitor C 2Between; Switching device Q 3One end and with high-frequency transformer coils N 1, capacitor C 3Connect the other end and thermo-compensator Rt, current sampling resistor R 7Connect, simultaneously also through resistance R 8With switching device Q 2Base stage connect; Q 3The control utmost point meets Q 2Collector electrode and through resistance R 5With coil N 1Forward end connects.
2, standby switches power supply as claimed in claim 1 is characterized in that high-frequency transformer coils N 3Backward end and rectifier D 6Anode connects, D 6Negative electrode and filter capacitor C 5, C 6Anodal, voltage-stabilizing device DW 2Positive pole join, at C 5And C 6Between be connected to resistance R 9
3, standby switches power supply as claimed in claim 1 or 2 is characterized in that high-frequency transformer coils N 4Forward end and rectifier D 7Anode connects, D 7Negative electrode and filter capacitor C 7The anodal connection.
CN 01277047 2001-12-10 2001-12-10 Wide voltage low power consumption switch power source of waiting machine Expired - Fee Related CN2525727Y (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 01277047 CN2525727Y (en) 2001-12-10 2001-12-10 Wide voltage low power consumption switch power source of waiting machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 01277047 CN2525727Y (en) 2001-12-10 2001-12-10 Wide voltage low power consumption switch power source of waiting machine

Publications (1)

Publication Number Publication Date
CN2525727Y true CN2525727Y (en) 2002-12-11

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN 01277047 Expired - Fee Related CN2525727Y (en) 2001-12-10 2001-12-10 Wide voltage low power consumption switch power source of waiting machine

Country Status (1)

Country Link
CN (1) CN2525727Y (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100367782C (en) * 2004-03-26 2008-02-06 四川长虹电器股份有限公司 Method and device for single tube reverse exciting power source for realizing low standby power loss
CN101873074A (en) * 2010-05-14 2010-10-27 保定中恒电气有限公司 Three-phase miniature high frequency switching power supply

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100367782C (en) * 2004-03-26 2008-02-06 四川长虹电器股份有限公司 Method and device for single tube reverse exciting power source for realizing low standby power loss
CN101873074A (en) * 2010-05-14 2010-10-27 保定中恒电气有限公司 Three-phase miniature high frequency switching power supply

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C19 Lapse of patent right due to non-payment of the annual fee
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