CN104779801A - Multiplexed output low-power-consumption standby switching power supply - Google Patents
Multiplexed output low-power-consumption standby switching power supply Download PDFInfo
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- CN104779801A CN104779801A CN201510125885.2A CN201510125885A CN104779801A CN 104779801 A CN104779801 A CN 104779801A CN 201510125885 A CN201510125885 A CN 201510125885A CN 104779801 A CN104779801 A CN 104779801A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
Abstract
The invention relates to a switching power supply. Aiming at the problem of high standby power in the prior art, the invention provides a multiplexed output low-power-consumption standby switching power supply which is characterized by comprising an MCU input control end, a 5V voltage output end, a rectifying and filtering circuit, an adsorption circuit, a switch transformer, a control chip, a chip power supply, a non-isolated output rectifier filter, an open-loop protection circuit, a power supply automatic cutting-off circuit, an isolated output rectifier filter, an LDO-5V (Low Dropout Regulator-to-5V) circuit, a feedback circuit and a mode switching circuit. A power supply management scheme is adopted, so that the power supply can work in two working modes, namely, a standby mode and a normal working mode. In standby mode, the power supply only outputs 5V power to an MCU and the rest of outputs are all cut off. Meanwhile, a low-power-consumption and high-efficiency LDO is selected to carry out secondary voltage stabilization, so that power consumption is low in the standby mode and efficiency is high in the normal working mode. The multiplexed output low-power-consumption standby switching power supply is suitable for the multiplexed output low-power-consumption standby switching power supply.
Description
Technical field
The present invention relates to Switching Power Supply, particularly the low power consumption switch power source of waiting machine of multiple-channel output.
Background technology
Power supply is each electronic equipment, the indispensable important component part of household appliances, but Switching Power Supply is again because its efficiency is high, volume is little, cost is low, and is widely used.
At present, each household appliances ubiquity problem, standby power is very high, much even reaches several more than W.Because a large amount of household appliances are in holding state for a long time, cause the huge waste of the energy.Current great majority use the household appliances of Switching Power Supply due to technical reason, in the standby state, because do not cut off other power supplys beyond MCU power supply completely, make a lot of circuit still be in power consumption state, cause standby power still very high.Along with the release of the new energy consumption standard of country, it is also proposed clear and definite requirement to stand-by power consumption, in the near future, requiring the stand-by power consumption of the white appliances such as refrigerator, air-conditioning, black appliances product will be more and more lower.In order to respond national energy-saving, environmental protection policy, the standby power reducing household appliances will become a trend, and higher energy consumption standard also will be released.
In prior art mostly now by Switching Power Supply owing to not managing power supply, whenever power supply always has voltage to export, and now use the three terminal regulator inefficiency of secondary pressure, quiescent dissipation high, cause idling consumption high, normal work limitation rate is lower in addition.Adopt power management scheme in this example, make power supply can be operated in two kinds of mode of operations, i.e. standby mode and normal mode of operation.When standby mode, power supply only exports 5V and powers to MCU, and all the other each roads export all cut-off.Meanwhile, select low-power consumption, high efficiency LDO does when secondary pressure makes standby low in energy consumption, normal work limitation rate is high.
This example provides a kind of doubleway output, controlled low power consumption switch power source of waiting machine, particular circuit configurations as shown in Figure 1, comprises MCU input control end, 5V voltage output end, rectification post filtering circuit 01, absorbing circuit 02, switch transformer 03, control chip 04, chip power 05, non-isolated output rectification filter 06, open loop protective circuit 07, power supply is autotomyed deenergizing 08, isolation and amplifier rectifying and wave-filtering 09, LDO turns 5V circuit 10, feedback circuit 11 and mode switching circuit 12, described mode switching circuit 12 is connected with MCU input control end and feedback circuit 11 respectively, feedback circuit 11 respectively with isolation and amplifier rectifying and wave-filtering 09, LDO turns 5V circuit 10 and control chip 04 connects, control chip 04 respectively with absorbing circuit 02, switch transformer 03 and chip power 05 connect, and chip power 05 is connected with open loop protective circuit 07 and switch transformer 03 respectively, switch transformer 03 respectively with isolation and amplifier rectifying and wave-filtering 09, absorbing circuit 02, rectification post filtering circuit 01, chip power 05 and non-isolated output rectification filter 06 connect, absorbing circuit 02 is connected with rectification post filtering circuit 01, non-isolated output rectification filter 06 deenergizing 08 of autotomying with open loop protective circuit 07 and power supply is respectively connected, isolation and amplifier rectifying and wave-filtering 09 and LDO turn 5V circuit 10 and are connected, and LDO turns 5V circuit 10 and is connected with 5V voltage output end.
Wherein, as shown in Figure 2, described rectification post filtering circuit 01 is high-voltage aluminium electrolysis capacitance C1; Described absorbing circuit 02 comprises high tension porcelain capacitance C7, TVS pipe two VD2 and diode five VD5; Described switch transformer 03 comprises armature winding B1, auxiliary winding B2, non-isolated exports winding B3, isolation and amplifier winding B4 and electric capacity 22 C22; Described control module 04 comprises control chip D4, resistance ten R10 and electric capacity 16 C16;
The positive pole of high-voltage aluminium electrolysis capacitance C1 is connected with one end of high tension porcelain capacitance C7, the positive pole of diode five VD5 and one end of armature winding B1 respectively, the other end of armature winding B1 is connected with the port eight of the positive pole of diode five VD5, the port seven of control chip D4 and control chip D4 respectively, and the negative pole of diode five VD5 is connected with the negative pole of TVS pipe two VD2 and the other end of high tension porcelain capacitance C7 respectively; One end of auxiliary winding B2 is connected with the port five of control chip D4 respectively by chip power 05, thermally, the other end of non-isolated winding B3 is connected with non-isolated output rectification filter 06 one termination of the auxiliary other end of winding B2, one end of non-isolated winding B3 and electric capacity 22 C22; The other end difference of electric capacity 22 C22, one end of isolation and amplifier winding B4 connect isolator; the other end of isolation and amplifier winding B4 is connected with isolation and amplifier rectifying and wave-filtering 09; the port one of control chip D4 is connected with one end of resistance ten R10; the port three of the other end of resistance ten R10, the port two of D4, D4, one end of electric capacity 16 C16 and the negative pole of high-voltage aluminium electrolysis capacitance C1 connect thermally, and the other end of electric capacity 16 C16 is connected with the port four of D4 and open loop protective circuit 07 respectively.
Chip power 05 comprises diode one VD1, electrochemical capacitor two C2 and resistance one R1, one end of described resistance one R1 is connected with one end of auxiliary winding B2, the other end of resistance one R1 is connected with the positive pole of diode one VD1, the negative pole of diode one VD1 is connected with the positive pole of electrochemical capacitor two C2 and the port five of control chip D4 respectively, and the negative pole of electrochemical capacitor C2 connects thermally.
Non-isolated output rectification filter 06 comprises diode six VD6, electrochemical capacitor 17 C17; the positive pole of diode six VD6 is connected with the other end of non-isolated winding B3; the negative pole of diode six VD6 is connected with the positive pole of electrochemical capacitor 17 C17 and open loop protective circuit 07 respectively, and the negative pole of electrochemical capacitor 17 C17 connects thermally.
Open loop protective circuit 07-1 comprises resistance 12 R12, resistance 21 R21, triode one V1 and zener diode three VD3, one end of resistance 21 R21 is connected to the positive pole of electrochemical capacitor 17 C17 and the negative pole of diode six VD6, the other end of resistance 21 R21 connects the negative pole of zener diode three VD3, the positive pole of zener diode three VD3 is connected to the base stage of triode one V1 and one end of resistance 12 R12, the other end of resistance 12 R12 is connected to thermally, the collector electrode of triode one V1 is connected to the port four of D4, the emitter of triode one V1 is connected to thermally.
Power supply deenergizing 08 of autotomying comprises PMOS two Q2, triode three V3, voltage stabilizing didoe four VD4, inductance three L3, resistance 22 R22, resistance 23 R23, resistance 26 R26, resistance 27 R27, filter capacitor 18 C18 and filter capacitor 13 C13, one end of resistance 22 R22, one end of resistance 26 R26 and the source electrode of PMOS two Q2 are connected with the positive pole of electrochemical capacitor 17 C17 respectively, the grid of PMOS two Q2 is connected with the other end of resistance 26 R26 and one end of resistance 27 R27 respectively, the other end of resistance 27 R27 is connected with the collector electrode of triode three V3, the ground level of triode three V3 is connected with one end of resistance R23 with the positive pole of zener diode four VD4 respectively, the negative pole of zener diode four VD4 is connected with the other end of resistance 22 R22, the other end of resistance 23 R23 and the emitter of triode three V3 connect thermally respectively, the drain electrode of PMOS two Q2 is connected with one end of inductance three L3, the other end of inductance three L3 is connected with the positive pole of filter capacitor 18 C18 and one end of filter capacitor 13 C13 respectively, the negative pole of filter capacitor 13 C18 is connected thermally with the other end of filter capacitor 13 C13.
Isolation and amplifier rectifying and wave-filtering 09 comprises diode 14 VD14, resistance two R2, Leaded Ceramic Disc Capacitor eight C8, electrochemical capacitor nine C9, inductance one L1 and electrochemical capacitor ten C10, the positive pole of diode 14 VD14 is connected with the other end of isolation and amplifier winding B4, the negative pole of diode 14 VD14 is connected with one end of electrochemical capacitor nine C9 positive pole and inductance one L1 respectively, resistance two R2 is parallel to after connecting with electric capacity eight C8 on diode 14 VD14, the other end of inductance one L1 is connected to the positive pole of electrochemical capacitor ten C10, the negative pole of electrochemical capacitor nine C9 and the negative pole of electrochemical capacitor ten C10 are connected to isolator.
Feedback circuit 11 comprises resistance four R4, resistance seven R7, resistance eight R8, resistance 24 R24, resistance 30 R30, resistance 31 R31, optocoupler PC-2, electric capacity 19 C19 and accurate integrated regulator D5;
Described mode switching circuit 12 comprises triode six V6, resistance 25 R25 and resistance 32 R32;
One end of resistance four R4 is connected to the positive pole of electrochemical capacitor nine C9, the other end of resistance four R4 is connected with one end of resistance seven R7 and the positive pole of optocoupler one PC1 respectively, the negative pole of optocoupler one PC1 respectively with one end of resistance 24 R24, the other end and the accurate integrated regulator D5 port three of resistance seven R7 are connected, the anode of light-operated brilliant valve pipe of optocoupler one PC1 is connected with the port four of control chip D4, the negative electrode of the light-operated brilliant valve pipe of optocoupler one PC1 connects thermally, the other end of resistance 24 R24 is connected with one end of electric capacity 19 C19, the other end of electric capacity 19 C19 respectively with resistance eight R8, one end of resistance 30 R30 and the port one of accurate integrated regulator D5 are connected, the other end of resistance eight R8 is connected with the positive pole of electrochemical capacitor ten C10, the other end of resistance 30 R30 is connected with one end of resistance 31 R31 and the collector electrode of triode six V6 respectively, one end of resistance 25 R25 and one end of resistance 32 R32 are connected respectively to the ground level of triode six V6, the other end of resistance 32 R32 is connected with MCU input control end, the other end of resistance 31 R31, the port two of D5, the emitter of the resistance 25 R25 other end and triode V6 connects coldly respectively.
LDO turns 5V circuit 10 and comprises LDO, output filter capacitor C14 and output filter capacitor C12, LDO port three and port six are connected with the positive pole of electrochemical capacitor ten C10 respectively, the port one of LDO is connected with one end of output filter capacitor C12 with the positive pole of filter capacitor C14 respectively, and the negative pole of filter capacitor C14, the other end of filter capacitor 12 C12, the port two of LDO and port five connect isolator.
During work, the Rectified alternating current of civil power after rectification is input to filter circuit 01, be connected to absorbing circuit 02, be input to switch transformer 03, by the control signal that control chip 04 provides, transformation is carried out to the voltage being input to switch transformer 03, and the voltage signal after transformation is exported to chip power 05, non-isolated output rectification filter 06 and isolation and amplifier rectifying and wave-filtering 09.Open loop protective circuit 07 connects non-isolated output filtering 06 and control chip 04 pair of power supply carries out overvoltage protection.Power supply autotomy deenergizing 08 according to the voltage condition of non-isolated output rectification filter 06 carry out from turn off.The output voltage that LDO turns 5V circuit 10 pairs of isolation and amplifier rectifying and wave-filterings 09 carries out secondary pressure output 5V.Mode switching circuit 12 receives the signal controlling feedback circuit 11 that MCU provides, and realizes power mode and switches.
Summary of the invention
Technical problem to be solved by this invention, is just to provide a kind of low power consumption switch power source of waiting machine of multiple-channel output, to reach the effect of the standby power reducing household appliances.
The present invention solve the technical problem, and the technical scheme of employing is, a kind of low power consumption switch power source of waiting machine of multiple-channel output, comprises MCU input control end, 5V voltage output end, rectification post filtering circuit 01, absorbing circuit 02, switch transformer 03, control chip 04, chip power 05, non-isolated output rectification filter 06, open loop protective circuit 07, power supply is autotomyed deenergizing 08, isolation and amplifier rectifying and wave-filtering 09, LDO turns 5V circuit 10, feedback circuit 11 and mode switching circuit 12, described mode switching circuit 12 is connected with MCU input control end and feedback circuit 11 respectively, feedback circuit 11 respectively with isolation and amplifier rectifying and wave-filtering 09, LDO turns 5V circuit 10 and control chip 04 connects, control chip 04 respectively with absorbing circuit 02, switch transformer 03 and chip power 05 connect, and chip power 05 is connected with open loop protective circuit 07 and switch transformer 03 respectively, switch transformer 03 respectively with isolation and amplifier rectifying and wave-filtering 09, absorbing circuit 02, rectification post filtering circuit 01, chip power 05 and non-isolated output rectification filter 06 connect, absorbing circuit 02 is connected with rectification post filtering circuit 01, non-isolated output rectification filter 06 deenergizing 08 of autotomying with open loop protective circuit 07 and power supply is respectively connected, isolation and amplifier rectifying and wave-filtering 09 and LDO turn 5V circuit 10 and are connected, and LDO turns 5V circuit 10 and is connected with 5V voltage output end.
Concrete, described rectification post filtering circuit 01 is high-voltage aluminium electrolysis capacitance C1; Described absorbing circuit 02 comprises high tension porcelain capacitance C7, TVS pipe two VD2 and diode five VD5; Described switch transformer 03 comprises armature winding B1, auxiliary winding B2, non-isolated exports winding B3, isolation and amplifier winding B4 and electric capacity 22 C22; Described control module 04 comprises control chip D4, resistance ten R10 and electric capacity 16 C16;
The positive pole of high-voltage aluminium electrolysis capacitance C1 is connected with one end of high tension porcelain capacitance C7, the positive pole of diode five VD5 and one end of armature winding B1 respectively, the other end of armature winding B1 is connected with the port eight of the positive pole of diode five VD5, the port seven of control chip D4 and control chip D4 respectively, and the negative pole of diode five VD5 is connected with the negative pole of TVS pipe two VD2 and the other end of high tension porcelain capacitance C7 respectively; One end of auxiliary winding B2 is connected with the port five of control chip D4 respectively by chip power 05, thermally, the other end of non-isolated winding B3 is connected with non-isolated output rectification filter 06 one termination of the auxiliary other end of winding B2, one end of non-isolated winding B3 and electric capacity 22 C22; The other end of electric capacity 22 C22 is connected isolator with one end of isolation and amplifier winding B4; the other end of isolation and amplifier winding B4 is connected with isolation and amplifier rectifying and wave-filtering 09; the port one of control chip D4 is connected with one end of resistance ten R10; the port three of the other end of resistance ten R10, the port two of D4, D4, one end of electric capacity 16 C16 and the negative pole of high-voltage aluminium electrolysis capacitance C1 connect thermally, and the other end of electric capacity 16 C16 is connected with the port four of D4 and open loop protective circuit 07 respectively.
Concrete, described chip power 05 comprises diode one VD1, electrochemical capacitor two C2, resistance one R1, one end of described resistance one R1 is connected with one end of auxiliary winding B2, the other end of resistance one R1 is connected with the positive pole of diode one VD1, the negative pole of diode one VD1 is connected with the positive pole of electrochemical capacitor two C2 and the port five of control chip D4 respectively, and the negative pole of electrochemical capacitor C2 connects thermally.
Concrete; described non-isolated output rectification filter 06 comprises diode six VD6, electrochemical capacitor 17 C17; the positive pole of diode six VD6 is connected with the other end of non-isolated winding B3; the negative pole of diode six VD6 is connected with the positive pole of electrochemical capacitor 17 C17 and open loop protective circuit 07 respectively, and the negative pole of electrochemical capacitor 17 C17 connects thermally.
Concrete, described open loop protective circuit 07-1 resistance 12 R12, resistance 21 R21, triode one V1, zener diode three VD3, one end of resistance 21 R21 is connected to the positive pole of electrochemical capacitor 17 C17 and the negative pole of diode six VD6, the other end of resistance 21 R21 connects the negative pole of zener diode three VD3, the positive pole of zener diode three VD3 is connected to the base stage of triode one V1 and one end of resistance 12 R12, the other end of resistance 12 R12 is connected to thermally, the collector electrode of triode one V1 is connected to the port four of D4, the emitter of triode one V1 is connected to thermally.
Concrete; described open loop ring protection circuit 07-2 (accompanying drawing 3) resistance 12 R122, triode 11 V11, zener diode 33 VD33; the emitter of triode 11 V11 is connected with the positive pole of electrochemical capacitor 17 C17; the collector electrode of triode 11 V11 is connected with the positive pole of electrochemical capacitor two C2; the base stage of triode 11 V11 is connected with one end of resistance 12 R122; the other end of resistance 12 R122 is connected with the negative pole of zener diode 33 VD33, and the positive pole of zener diode 33 VD33 connects thermally.
Concrete, described power supply deenergizing 08 of autotomying comprises PMOS two Q2, triode three V3, voltage stabilizing didoe four VD4, inductance three L3, resistance 22 R22, resistance 23 R23, resistance 26 R26, resistance 27 R27, filter capacitor 18 C18 and filter capacitor 13 C13, one end of resistance 22 R22, one end of resistance 26 R26 and the source electrode of PMOS two Q2 are connected with the positive pole of electrochemical capacitor 17 C17 respectively, the grid of PMOS two Q2 is connected with the other end of resistance 26 R26 and one end of resistance 27 R27 respectively, the other end of resistance 27 R27 is connected with the collector electrode of triode three V3, the ground level of triode three V3 is connected with one end of resistance R23 with the positive pole of zener diode four VD4 respectively, the negative pole of zener diode four VD4 is connected with the other end of resistance 22 R22, the other end of resistance 23 R23 and the emitter of triode three V3 connect thermally respectively, the drain electrode of PMOS two Q2 is connected with one end of inductance three L3, the other end of inductance three L3 is connected with the positive pole of filter capacitor 18 C18 and one end of filter capacitor 13 C13 respectively, the negative pole of filter capacitor 13 C18 is connected thermally with the other end of filter capacitor 13 C13.
Concrete, described isolation and amplifier rectifying and wave-filtering 09 comprises diode 14 VD14, resistance two R2, Leaded Ceramic Disc Capacitor eight C8, electrochemical capacitor nine C9, inductance one L1 and electrochemical capacitor ten C10, the positive pole of diode 14 VD14 is connected with the other end of isolation and amplifier winding B4, the negative pole of diode 14 VD14 is connected with one end of electrochemical capacitor nine C9 positive pole and inductance one L1 respectively, resistance two R2 is parallel to after connecting with electric capacity eight C8 on diode 14 VD14, the other end of inductance one L1 is connected to the positive pole of electrochemical capacitor ten C10, the negative pole of electrochemical capacitor nine C9 and the negative pole of electrochemical capacitor ten C10 are connected to isolator.
Concrete, described feedback circuit 11 comprises resistance four R4, resistance seven R7, resistance eight R8, resistance 24 R24, resistance 30 R30, resistance 31 R31, optocoupler PC-2, electric capacity 19 C19 and accurate integrated regulator D5;
Described mode switching circuit 12 comprises triode six V6, resistance 25 R25 and resistance 32 R32;
One end of resistance four R4 is connected to the positive pole of electrochemical capacitor nine C9, the other end of resistance four R4 is connected with one end of resistance seven R7 and the positive pole of optocoupler one PC1 respectively, the negative pole of optocoupler one PC1 respectively with one end of resistance 24 R24, the other end and the accurate integrated regulator D5 port three of resistance seven R7 are connected, the anode of light-operated brilliant valve pipe of optocoupler one PC1 is connected with the port four of control chip D4, the negative electrode of the light-operated brilliant valve pipe of optocoupler one PC1 connects thermally, the other end of resistance 24 R24 is connected with one end of electric capacity 19 C19, the other end of electric capacity 19 C19 respectively with resistance eight R8, one end of resistance 30 R30 and the port one of accurate integrated regulator D5 are connected, the other end of resistance eight R8 is connected with the positive pole of electrochemical capacitor ten C10, the other end of resistance 30 R30 is connected with one end of resistance 31 R31 and the collector electrode of triode six V6 respectively, one end of resistance 25 R25 and one end of resistance 32 R32 are connected respectively to the ground level of triode six V6, the other end of resistance 32 R32 is connected with MCU input control end, the other end of resistance 31 R31, the port two of D5, the emitter of the resistance 25 R25 other end and triode V6 connects coldly respectively.
Concrete, described LDO turns 5V circuit 10 and comprises LDO, output filter capacitor C14 and output filter capacitor C12, LDO port three and port six are connected with the positive pole of electrochemical capacitor ten C10 respectively, the port one of LDO is connected with one end of output filter capacitor C12 with the positive pole of filter capacitor C14 respectively, and the negative pole of filter capacitor C14, the other end of filter capacitor 12 C12, the port two of LDO and port five connect isolator.
The invention has the beneficial effects as follows: adopt power management scheme, make power supply can be operated in two kinds of mode of operations, i.e. standby mode and normal mode of operation.When standby mode, power supply only exports 5V and powers to MCU, and all the other each roads export all cut-off.Meanwhile, select low-power consumption, high efficiency LDO does when secondary pressure makes standby low in energy consumption, normal work limitation rate is high.
Accompanying drawing explanation
Fig. 1 is the structured flowchart of the low power consumption switch power source of waiting machine embodiment 1 of a kind of multiple-channel output of the present invention;
Fig. 2 is the circuit diagram of the low power consumption switch power source of waiting machine embodiment 1 of a kind of multiple-channel output of the present invention;
Fig. 3 is the circuit diagram of the low power consumption switch power source of waiting machine embodiment 2 of a kind of multiple-channel output of the present invention;
Wherein, rectification post filtering circuit 01, absorbing circuit 02, switch transformer 03, control chip 04, chip power 05, non-isolated output rectification filter 06, open loop protective circuit 07, power supply is autotomyed deenergizing 08, isolation and amplifier rectifying and wave-filtering 09, LDO turns 5V circuit 10, feedback circuit 11, mode switching circuit 12, high-voltage aluminium electrolysis capacitance C1, high tension porcelain capacitance C7, TVS pipe two VD2, diode five VD5, armature winding B1, auxiliary winding B2, non-isolated exports winding B3, isolation and amplifier winding B4, electric capacity 22 C22, control chip D4, resistance ten R10, electric capacity 16 C16, diode one VD1, electrochemical capacitor two C2, resistance one R1, resistance 12 R12, resistance 21 R21, triode one V1, zener diode three VD3, resistance 12 R122, triode 11 V11, zener diode 33 VD33, PMOS two Q2, triode three V3, voltage stabilizing didoe four VD4, inductance three L3, resistance 22 R22, resistance 23 R23, resistance 26 R26, resistance 27 R27, filter capacitor 18 C18, filter capacitor 13 C13, diode 14 VD14, resistance two R2, Leaded Ceramic Disc Capacitor eight C8, electrochemical capacitor nine C9, inductance one L1, electrochemical capacitor ten C10, resistance four R4, resistance seven R7, resistance eight R8, resistance 24 R24, resistance 30 R30, resistance 31 R31, optocoupler PC-2, electric capacity 19 C19, accurate integrated regulator D5, triode six V6, resistance 25 R25, resistance 32 R32, output filter capacitor C14 and output filter capacitor C12.
Embodiment
Technical scheme of the present invention is described in detail below in conjunction with drawings and Examples:
The present invention is directed to the problem that in prior art, standby power is very high, a kind of low power consumption switch power source of waiting machine of multiple-channel output is provided, it is characterized in that, comprise MCU input control end, 5V voltage output end, rectification post filtering circuit 01, absorbing circuit 02, switch transformer 03, control chip 04, chip power 05, non-isolated output rectification filter 06, open loop protective circuit 07, power supply is autotomyed deenergizing 08, isolation and amplifier rectifying and wave-filtering 09, LDO turns 5V circuit 10, feedback circuit 11 and mode switching circuit 12, described mode switching circuit 12 is connected with MCU input control end and feedback circuit 11 respectively, feedback circuit 11 respectively with isolation and amplifier rectifying and wave-filtering 09, LDO turns 5V circuit 10 and control chip 04 connects, control chip 04 respectively with absorbing circuit 02, switch transformer 03 and chip power 05 connect, and chip power 05 is connected with open loop protective circuit 07 and switch transformer 03 respectively, switch transformer 03 respectively with isolation and amplifier rectifying and wave-filtering 09, absorbing circuit 02, rectification post filtering circuit 01, chip power 05 and non-isolated output rectification filter 06 connect, absorbing circuit 02 is connected with rectification post filtering circuit 01, non-isolated output rectification filter 06 deenergizing 08 of autotomying with open loop protective circuit 07 and power supply is respectively connected, isolation and amplifier rectifying and wave-filtering 09 and LDO turn 5V circuit 10 and are connected, and LDO turns 5V circuit 10 and is connected with 5V voltage output end.Adopt power management scheme, make power supply can be operated in two kinds of mode of operations, i.e. standby mode and normal mode of operation.When standby mode, power supply only exports 5V and powers to MCU, and all the other each roads export all cut-off.Meanwhile, select low-power consumption, high efficiency LDO does when secondary pressure makes standby low in energy consumption, normal work limitation rate is high.
Embodiment 1
Embodiment 2
The basic circuit of this example is identical with embodiment 1, wherein difference is that open loop protective circuit 07-2 in this example as shown in Figure 3, comprise resistance 12 R122, triode 11 V11 and zener diode 33 VD33, the emitter of triode 11 V11 is connected with the positive pole of electrochemical capacitor 17 C17, the collector electrode of triode 11 V11 is connected with the positive pole of electrochemical capacitor two C2, the base stage of triode 11 V11 is connected with one end of resistance 12 R122, the other end of resistance 12 R122 is connected with the negative pole of zener diode 33 VD33, the positive pole of zener diode 33 VD33 connects thermally.
In sum, the present invention adopts power management scheme, makes power supply can be operated in two kinds of mode of operations, i.e. standby mode and normal mode of operation.When standby mode, power supply only exports 5V and powers to MCU, and all the other each roads export all cut-off.Meanwhile, select low-power consumption, high efficiency LDO does when secondary pressure makes standby low in energy consumption, normal work limitation rate is high.
Claims (10)
1. a low power consumption switch power source of waiting machine for multiple-channel output, is characterized in that, comprises MCU input control end, 5V voltage output end, rectification post filtering circuit (01), absorbing circuit (02), switch transformer (03), control module (04), chip power (05), non-isolated output rectification filter (06), open loop protective circuit (07), power supply is autotomyed deenergizing (08), isolation and amplifier rectifying and wave-filtering (09), LDO turns 5V circuit (10), feedback circuit (11) and mode switching circuit (12), described mode switching circuit (12) is connected with MCU input control end and feedback circuit (11) respectively, feedback circuit (11) respectively with isolation and amplifier rectifying and wave-filtering (09), LDO turns 5V circuit (10) and control module (04) and connects, control module (04) respectively with absorbing circuit (02), switch transformer (03) and chip power (05) connect, chip power (05) is connected with open loop protective circuit (07) and switch transformer (03) respectively, switch transformer (03) respectively with isolation and amplifier rectifying and wave-filtering (09), absorbing circuit (02), rectification post filtering circuit (01), chip power (05) and non-isolated output rectification filter (06) connect, absorbing circuit (02) is connected with rectification post filtering circuit (01), non-isolated output rectification filter (06) deenergizing (08) of autotomying with open loop protective circuit (07) and power supply is respectively connected, isolation and amplifier rectifying and wave-filtering (09) and LDO turn 5V circuit (10) and are connected, and LDO turns 5V circuit (10) and is connected with 5V voltage output end.
2. the low power consumption switch power source of waiting machine of a kind of multiple-channel output according to claim 1, is characterized in that, described rectification post filtering circuit (01) is high-voltage aluminium electrolysis capacitance (C1); Described absorbing circuit (02) comprises high tension porcelain capacitance (C7), TVS pipe two (VD2) and diode five (VD5); Described switch transformer (03) comprises armature winding (B1), auxiliary winding (B2), non-isolated output winding (B3), isolation and amplifier winding (B4) and electric capacity 22 (C22); Described control module (04) comprises control chip (D4), resistance ten (R10) and electric capacity 16 (C16);
The positive pole of high-voltage aluminium electrolysis capacitance (C1) is connected with one end of one end of high tension porcelain capacitance (C7), the positive pole of TVS pipe two (VD2) and armature winding (B1) respectively, the other end of armature winding (B1) is connected with the port eight of the positive pole of diode five (VD5), the port seven of control chip (D4) and control chip (D4) respectively, and the negative pole of diode five (VD5) is connected with the negative pole of TVS pipe two (VD2) and the other end of high tension porcelain capacitance (C7) respectively, one end of auxiliary winding (B2) is connected respectively by the port five of chip power (05) with control chip (D4), thermally, the other end of non-isolated winding (B3) is connected with non-isolated output rectification filter (06) one termination of the auxiliary other end of winding (B2), one end of non-isolated winding (B3) and electric capacity 22 (C22), the other end of electric capacity 22 (C22) is connected isolator with one end of isolation and amplifier winding (B4), the other end of isolation and amplifier winding (B4) is connected with isolation and amplifier rectifying and wave-filtering (09), the port one of control chip (D4) is connected with one end of resistance ten (R10), the other end of resistance ten (R10), the port two of control chip (D4), the port three of control chip (D4), one end of electric capacity 16 (C16) and the negative pole of high-voltage aluminium electrolysis capacitance (C1) connect thermally, the other end of electric capacity 16 (C16) is connected with the port four of control chip (D4) and open loop protective circuit (07) respectively.
3. the low power consumption switch power source of waiting machine of a kind of multiple-channel output according to claim 2, it is characterized in that, described chip power (05) comprises diode one (VD1), electrochemical capacitor two (C2) and resistance one (R1), one end of described resistance one (R1) is connected with one end of auxiliary winding (B2), the other end of resistance one (R1) is connected with the positive pole of diode one (VD1), the negative pole of diode one (VD1) is connected with the positive pole of electrochemical capacitor two (C2) and the port five of control chip (D4) respectively, the negative pole of electrochemical capacitor (C2) connects thermally.
4. the low power consumption switch power source of waiting machine of a kind of multiple-channel output according to claim 3; it is characterized in that; described non-isolated output rectification filter (06) comprises diode six (VD6), electrochemical capacitor 17 (C17); the positive pole of diode six (VD6) is connected with the other end of non-isolated winding (B3); the negative pole of diode six (VD6) is connected with the positive pole of electrochemical capacitor 17 (C17) and open loop protective circuit (07) respectively, and the negative pole of electrochemical capacitor 17 (C17) connects thermally.
5. the low power consumption switch power source of waiting machine of a kind of multiple-channel output according to claim 4, it is characterized in that, described open loop protective circuit (07-1) comprises resistance 12 (R12), resistance 21 (R21), triode one (V1) and zener diode three (VD3), one end of resistance 21 (R21) is connected to the positive pole of electrochemical capacitor 17 (C17) and the negative pole of diode six (VD6), the other end of resistance 21 (R21) connects the negative pole of zener diode three (VD3), the positive pole of zener diode three (VD3) is connected to the base stage of triode one (V1) and one end of resistance 12 (R12), the other end of resistance 12 (R12) is connected to thermally, the collector electrode of triode one (V1) is connected to the port four of control chip (D4), the emitter of triode one (V1) is connected to thermally.
6. the low power consumption switch power source of waiting machine of a kind of multiple-channel output according to claim 5, it is characterized in that, described open loop protective circuit (07-2) (accompanying drawing 3) comprises resistance 12 (R122), triode 11 (V11) and zener diode 33 (VD33), the emitter of triode 11 (V11) is connected with the positive pole of electrochemical capacitor 17 (C17), the collector electrode of triode 11 (V11) is connected with the positive pole of electrochemical capacitor two (C2), the base stage of triode 11 (V11) is connected with one end of resistance 12 (R122), the other end of resistance 12 (R122) is connected with the negative pole of zener diode 33 (VD33), the positive pole of zener diode 33 (VD33) connects thermally.
7. the low power consumption switch power source of waiting machine of a kind of multiple-channel output according to claim 5 or 6, it is characterized in that, described power supply deenergizing (08) of autotomying comprises PMOS two (Q2), triode three (V3), voltage stabilizing didoe four (VD4), inductance three (L3), resistance 22 (R22), resistance 23 (R23), resistance 26 (R26), resistance 27 (R27), filter capacitor 18 (C1) 8 and filter capacitor 13 (C13), one end of resistance 22 (R22), one end of resistance 26 (R26) and the source electrode of PMOS two (Q2) are connected with the positive pole of electrochemical capacitor 17 (C17) respectively, the grid of PMOS two (Q2) is connected with the other end of resistance 26 (R26) and one end of resistance 27 (R27) respectively, (collector electrode of V3 is connected for the other end and the triode three of resistance 27 (R27), (ground level of V3 is connected with one end of resistance (R23) with the positive pole of zener diode four (VD4) triode three respectively, the negative pole of zener diode four (VD4) is connected with the other end of resistance 22 (R22), the other end of resistance 23 (R23) and the emitter of triode three (V3) connect thermally respectively, the drain electrode of PMOS two (Q2) is connected with one end of inductance three (L3), the other end of inductance three (L3) is connected with the positive pole of filter capacitor 18 (C18) and one end of filter capacitor 13 (C13) respectively, the negative pole of filter capacitor 13 (C18) is connected thermally with the other end of filter capacitor 13 (C13).
8. the low power consumption switch power source of waiting machine of a kind of multiple-channel output according to claim 7, it is characterized in that, described isolation and amplifier rectifying and wave-filtering (09) comprises diode 14 (VD14), resistance two (R2), Leaded Ceramic Disc Capacitor eight (C8), electrochemical capacitor nine (C9), inductance one (L1) and electrochemical capacitor ten (C10), the positive pole of diode 14 (VD14) is connected with the other end of isolation and amplifier winding (B4), the negative pole of diode 14 (VD14) is connected with one end of electrochemical capacitor nine (C9) positive pole and inductance one (L1) respectively, resistance two (R2) is parallel to after connecting with electric capacity eight (C8) on diode 14 (VD14), the other end of inductance one (L1) is connected to the positive pole of electrochemical capacitor ten (C10), the negative pole of electrochemical capacitor nine (C9) and the negative pole of electrochemical capacitor ten (C10) are connected to isolator.
9. the low power consumption switch power source of waiting machine of a kind of multiple-channel output according to claim 8, it is characterized in that, described feedback circuit (11) comprises resistance four (R4), resistance seven (R7), resistance eight (R8), resistance 24 (R24), resistance 30 (R30), resistance 31 (R31), optocoupler one (PC1), electric capacity 19 (C19) and accurate integrated regulator (D5);
Described mode switching circuit (12) comprises triode six (V6), resistance 25 (R25) and resistance 32 (R32);
One end of resistance four (R4) is connected to the positive pole of electrochemical capacitor nine (C9), the other end of resistance four (R4) is connected with one end of resistance seven (R7) and the light-emitting diode positive pole of optocoupler one (PC1) respectively, the light-emitting diode negative pole of optocoupler one (PC1) respectively with one end of resistance 24 (R24), the other end and accurate integrated regulator (D5) port three of resistance seven (R7) are connected, the anode of the light-operated brilliant valve pipe of optocoupler one (PC1) is connected with the port four of control chip (D4), the negative electrode of the light-operated brilliant valve pipe of optocoupler one (PC1) connects thermally, the other end of resistance 24 (R24) is connected with one end of electric capacity 19 (C19), the other end of electric capacity 19 (C19) respectively with resistance eight (R8), one end of resistance 30 (R30) and the port one of accurate integrated regulator (D5) are connected, the other end of resistance eight (R8) is connected with the positive pole of electrochemical capacitor ten (C10), the other end of resistance 30 (R30) is connected with one end of resistance 31 (R31) and the collector electrode of triode six (V6) respectively, one end of resistance 25 (R25) and one end of resistance 32 (R32) are connected respectively to the ground level of triode six (V6), the other end of resistance 32 (R32) is connected with MCU input control end, the other end of resistance 31 (R31), the port two of accurate integrated regulator (D5), the emitter of resistance 25 (R25) other end and triode (V6) connects coldly respectively.
10. the low power consumption switch power source of waiting machine of a kind of multiple-channel output according to claim 9, it is characterized in that, described LDO turns 5V circuit (10) and comprises LDO, output filter capacitor (C14) and output filter capacitor (C12), LDO port three and port six are connected with the positive pole of electrochemical capacitor ten (C10) respectively, the port one of LDO is connected with one end of output filter capacitor (C12) with the positive pole of filter capacitor (C14) respectively, the negative pole of filter capacitor (C14), the other end of filter capacitor 12 (C12), port two and the port five of LDO connect isolator.
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| CN201510125885.2A CN104779801A (en) | 2015-03-20 | 2015-03-20 | Multiplexed output low-power-consumption standby switching power supply |
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| CN201510125885.2A CN104779801A (en) | 2015-03-20 | 2015-03-20 | Multiplexed output low-power-consumption standby switching power supply |
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| CN106059302A (en) * | 2016-07-18 | 2016-10-26 | 宁波三星医疗电气股份有限公司 | Switching power supply feedback circuit |
| CN106533175A (en) * | 2015-09-11 | 2017-03-22 | 亚荣源科技（深圳）有限公司 | Retracing type power converter |
| CN110932534A (en) * | 2019-11-29 | 2020-03-27 | 中国电子科技集团公司第十三研究所 | Spurious suppression device, frequency source and electronic equipment |
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Application publication date: 20150715 |