CN203596658U - Power supply control output circuit - Google Patents

Power supply control output circuit Download PDF

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Publication number
CN203596658U
CN203596658U CN201320818831.0U CN201320818831U CN203596658U CN 203596658 U CN203596658 U CN 203596658U CN 201320818831 U CN201320818831 U CN 201320818831U CN 203596658 U CN203596658 U CN 203596658U
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CN
China
Prior art keywords
diode
power supply
triode
comparator
resistance
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Expired - Fee Related
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CN201320818831.0U
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Chinese (zh)
Inventor
黄洪平
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SICHUAN HONGPING ELECTRONICS CO Ltd
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SICHUAN HONGPING ELECTRONICS CO Ltd
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Priority to CN201320818831.0U priority Critical patent/CN203596658U/en
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Publication of CN203596658U publication Critical patent/CN203596658U/en
Expired - Fee Related legal-status Critical Current
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Abstract

The utility model discloses a power supply control output circuit which comprises a power supply unit, a comparison unit, a switching unit and an isolation unit. The power supply unit includes an adapter power supply S1 and a battery power supply S2, wherein the adapter power supply S1 is connected with a power supply output end Vo. The comparison unit includes a comparator N1. The switching unit includes a triode V1, a triode V2 and a field effect transistor V3. The isolation unit includes a diode D1 and a diode D2. With the adoption of the above circuit structure, the power supply control output unit solves a problem of switching between the adapter power supply and the battery power supply, and helps to reduce useless consumption of power and improves the utilization efficiency of the battery.

Description

A kind of power supply control output circuit
Technical field
The utility model relates to power supply control field, specifically a kind of power supply control output circuit.
Background technology
At present, a lot of equipment can be connected with socket power by power supply adaptor, and works out of doors for convenient, also can adopt powered battery, and adaptor power supplies and battery supply all can guarantee the normal work of equipment.But some equipment lacks necessary power supply control, cause in adaptor power supplies in the situation that disconnecting suddenly, battery supply cannot be caught up with, can only restarting equipment, so that battery supply starts equipment to power.In addition, equipment generally includes a lot of parts, and as mainboard, display, input/output unit etc., if switch unreasonablely between adaptor power supplies and battery supply, the useless consumption that is easy to increase power supply also can reduce the service efficiency of battery simultaneously.
Utility model content
The utility model provides a kind of power supply control output circuit, can effectively solve the switching problem between adaptor power supplies and battery supply, reduces the useless consumption of power supply, improves the service efficiency of battery.
The purpose of this utility model is achieved through the following technical solutions: a kind of power supply control output circuit, comprise power subsystem, comparing unit, switch element, isolated location, described power subsystem comprises adaptor power supplies S1, battery supply S2, adaptor power supplies S1 connects power output end Vo, described comparing unit comprises comparator N1, described switch element comprises triode V1, triode V2 and field effect transistor V3, and described isolated location comprises diode D1, diode D2;
Between described adaptor power supplies S1 and earth terminal, be connected with resistance R 1, the resistance R 2 of connecting, the output of resistance R 1 is connected with the in-phase end of comparator N1, between battery supply S2 and earth terminal, be connected with resistance R 3, the resistance R 4 of connecting, the output of resistance R 3 is connected with the end of oppisite phase of comparator N1;
The cathode power supply end of described comparator N1 is respectively by diode D1, diode D2 and battery supply S2, adaptor power supplies S1, the anode of diode D1 is connected with battery supply S2, the anode of diode D2 is connected with adaptor power supplies S1, the negative power supply end ground connection of comparator N1;
The base stage of described triode V1 is connected with the output of comparator N1, grounded emitter, and collector electrode is connected with the cathode power supply end of comparator N1 by series resistor R6;
The base stage of described triode V2 is connected with the collector electrode of diode V1, the grounded emitter of triode V2, and the collector electrode of triode V2 is connected with battery supply S2 by series resistor R8, and the base stage of triode V2 is also connected with battery supply S2 by series resistor R7;
The grid of described field effect transistor V3 is connected with the collector electrode of triode V2, and the source electrode of field effect transistor V3 is connected with battery supply S2, and the drain electrode of field effect transistor V3 meets power output end Vo.
Further, between the output of described comparator N1 and the base stage of triode V1, be connected with resistance R 5.
Further, be connected with the diode D3, the diode D4 that connect between described adaptor power supplies S1 and resistance R 1, the anode of diode D3 is connected with adaptor power supplies S1, the anodic bonding of the negative electrode of diode D3 and diode D4.
Further, the drain electrode of described field effect transistor V3 is connected with capacitor C 1, capacitor C 2, and one end of described capacitor C 1, capacitor C 2 is connected with the drain electrode of field effect transistor V3, the equal ground connection of the other end.
Further, the model that described comparator N1 adopts is LM193.
The utlity model has following beneficial effect:
(1) the utility model, by comparing unit, switch element, has been realized the hot-swap to adaptor power supplies and battery supply, makes power output end can obtain continual and steady voltage stabilizing, thereby guarantees the normal work of equipment.
(2) the utility model is by comparing unit is set, and in the time that adaptor power supplies is powered, battery supply is not in place in circuit, and in the time that adaptor power supplies disconnects, battery supply just accesses, thereby guarantees that battery supply is utilized well, has also avoided too much useless consumption.
Accompanying drawing explanation
Fig. 1 is the electrical block diagram of embodiment 1 of the present utility model;
Fig. 2 is the electrical block diagram of embodiment 2 of the present utility model;
Fig. 3 is the electrical block diagram of embodiment 3 of the present utility model;
Fig. 4 is the electrical block diagram of embodiment 4 of the present utility model.
embodiment
Below in conjunction with embodiment and accompanying drawing, the utility model is described in further detail, but execution mode of the present utility model is not limited only to this.
Embodiment 1:
As shown in Figure 1, a kind of power supply control output circuit described in the present embodiment, comprise power subsystem, comparing unit, switch element, isolated location, power subsystem comprises adaptor power supplies S1, battery supply S2, adaptor power supplies S1 connects power output end Vo, comparing unit comprises comparator N1, and switch element comprises triode V1, triode V2 and field effect transistor V3, and isolated location comprises diode D1, diode D2.
Between the adaptor power supplies S1 of the present embodiment and earth terminal, be connected with resistance R 1, the resistance R 2 of connecting, the output of resistance R 1 is connected with the in-phase end of comparator N1, between battery supply S2 and earth terminal, be connected with resistance R 3, the resistance R 4 of connecting, the output of resistance R 3 is connected with the end of oppisite phase of comparator N1.
The cathode power supply end of the comparator N1 of the present embodiment is respectively by diode D1, diode D2 and battery supply S2, adaptor power supplies S1, the anode of diode D1 is connected with battery supply S2, the anode of diode D2 is connected with adaptor power supplies S1, the negative power supply end ground connection of comparator N1, diode D1, diode D2 play the effect of isolation adaptor power supplies S1 and battery supply S2.
The base stage of the triode V1 of the present embodiment is connected with the output of comparator N1, grounded emitter, and collector electrode is connected with the cathode power supply end of comparator N1 by series resistor R6.
The base stage of the triode V2 of the present embodiment is connected with the collector electrode of diode V1, the grounded emitter of triode V2, the collector electrode of triode V2 is connected with battery supply S2 by series resistor R8, and the base stage of triode V2 is also connected with battery supply S2 by series resistor R7.
The grid of the field effect transistor V3 of the present embodiment is connected with the collector electrode of triode V2, and the source electrode of field effect transistor V3 is connected with battery supply S2, and the drain electrode of field effect transistor V3 meets power output end Vo.
As preferably, the model that the comparator N1 of the present embodiment adopts is LM193.
The operation principle of the present embodiment: in the time of external adaptor power supplies S1, the voltage of adaptor power supplies S1 is greater than the voltage of battery supply S2, the voltage of adaptor power supplies S1 is added to the in-phase end of comparator N1 after resistance R 1, R2 dividing potential drop, the voltage of battery supply S2 is added to the end of oppisite phase of comparator N1 after resistance R 3, resistance R 4 dividing potential drops, because the voltage of in-phase end is higher than the voltage of end of oppisite phase, therefore comparator N1 output high level, triode V1 conducting, triode V2 cut-off, field effect transistor V3 cut-off, the voltage of the direct o adapter power supply of power output end Vo; In the time that adaptor power supplies S1 disconnects, the voltage of the in-phase end of comparator N1 is less than the voltage of end of oppisite phase, the output output low level of comparator N1, triode V1 cut-off, triode V2 conducting, field effect transistor V3 conducting, the voltage of battery supply S2 is through source electrode, the drain electrode of the field effect transistor V3 of conducting, power output end Vo obtains the voltage of battery supply S2, thereby has realized the hot-swap between two kinds of voltages.
Embodiment 2:
As shown in Figure 2; the present embodiment is substantially the same manner as Example 1; different places are; between the output of the comparator N1 of the present embodiment and the base stage of triode V1, be connected with resistance R 5; thereby protection triode V1; too high and the triode V1 a little of the output voltage that prevents comparator N1, and then improve the functional reliability of circuit.
Embodiment 3:
As shown in Figure 3, the present embodiment is substantially the same manner as Example 2, different places are, are connected with the diode D3, the diode D4 that connect between the adaptor power supplies S1 of the present embodiment and resistance R 1, and the anode of diode D3 is connected with adaptor power supplies S1, the anodic bonding of the negative electrode of diode D3 and diode D4, be connected in series after two diodes, can improve the voltage endurance capability of circuit, increase the capacitive reactance of current circuit, reduce the electric current of ac circuit, and then reduce the wastage.
Embodiment 4:
As shown in Figure 4, the present embodiment is substantially the same manner as Example 3, different places are, the drain electrode of the field effect transistor V3 of the present embodiment is connected with capacitor C 1, capacitor C 2, one end of capacitor C 1, capacitor C 2 is connected with the drain electrode of field effect transistor V3, the equal ground connection of the other end, by the filter action of capacitor C 1, capacitor C 2, makes the voltage of output more stable.
The utility model is illustrated by above-described embodiment, but should be understood that, above-described embodiment is the object for giving an example and illustrating just, but not is intended to the utility model to be limited in described scope of embodiments.In addition; it will be understood by those skilled in the art that; the utility model is not limited to above-described embodiment, can also make more kinds of variants and modifications according to instruction of the present utility model, and these variants and modifications all drop in the utility model scope required for protection.

Claims (5)

1. a power supply control output circuit, it is characterized in that: comprise power subsystem, comparing unit, switch element, isolated location, described power subsystem comprises adaptor power supplies S1, battery supply S2, adaptor power supplies S1 connects power output end Vo, described comparing unit comprises comparator N1, described switch element comprises triode V1, triode V2 and field effect transistor V3, and described isolated location comprises diode D1, diode D2;
Between described adaptor power supplies S1 and earth terminal, be connected with resistance R 1, the resistance R 2 of connecting, the output of resistance R 1 is connected with the in-phase end of comparator N1, between battery supply S2 and earth terminal, be connected with resistance R 3, the resistance R 4 of connecting, the output of resistance R 3 is connected with the end of oppisite phase of comparator N1;
The cathode power supply end of described comparator N1 is respectively by diode D1, diode D2 and battery supply S2, adaptor power supplies S1, the anode of diode D1 is connected with battery supply S2, the anode of diode D2 is connected with adaptor power supplies S1, the negative power supply end ground connection of comparator N1;
The base stage of described triode V1 is connected with the output of comparator N1, grounded emitter, and collector electrode is connected with the cathode power supply end of comparator N1 by series resistor R6;
The base stage of described triode V2 is connected with the collector electrode of diode V1, the grounded emitter of triode V2, and the collector electrode of triode V2 is connected with battery supply S2 by series resistor R8, and the base stage of triode V2 is also connected with battery supply S2 by series resistor R7;
The grid of described field effect transistor V3 is connected with the collector electrode of triode V2, and the source electrode of field effect transistor V3 is connected with battery supply S2, and the drain electrode of field effect transistor V3 meets power output end Vo.
2. a kind of power supply control output circuit according to claim 1, is characterized in that: between the output of described comparator N1 and the base stage of triode V1, be connected with resistance R 5.
3. a kind of power supply control output circuit according to claim 1, it is characterized in that: between described adaptor power supplies S1 and resistance R 1, be connected with the diode D3, the diode D4 that connect, the anode of diode D3 is connected with adaptor power supplies S1, the anodic bonding of the negative electrode of diode D3 and diode D4.
4. a kind of power supply control output circuit according to claim 1, is characterized in that: the drain electrode of described field effect transistor V3 is connected with capacitor C 1, capacitor C 2, and one end of described capacitor C 1, capacitor C 2 is connected with the drain electrode of field effect transistor V3, the equal ground connection of the other end.
5. a kind of power supply control output circuit according to claim 1, is characterized in that: the model that described comparator N1 adopts is LM193.
CN201320818831.0U 2013-12-13 2013-12-13 Power supply control output circuit Expired - Fee Related CN203596658U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201320818831.0U CN203596658U (en) 2013-12-13 2013-12-13 Power supply control output circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201320818831.0U CN203596658U (en) 2013-12-13 2013-12-13 Power supply control output circuit

Publications (1)

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CN203596658U true CN203596658U (en) 2014-05-14

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104753165A (en) * 2015-03-27 2015-07-01 国家电网公司 Multi-channel power supply control circuit of electricity measuring device and integrated power control board in electric meter
CN104821653A (en) * 2015-03-27 2015-08-05 国家电网公司 Ammeter and power supply circuit therein, and power supply control method inside the ammeter
CN106663961A (en) * 2014-06-06 2017-05-10 安晟信医疗科技控股公司 Power source switching apparatus and methods for dual-powered electronic devices

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106663961A (en) * 2014-06-06 2017-05-10 安晟信医疗科技控股公司 Power source switching apparatus and methods for dual-powered electronic devices
CN104753165A (en) * 2015-03-27 2015-07-01 国家电网公司 Multi-channel power supply control circuit of electricity measuring device and integrated power control board in electric meter
CN104821653A (en) * 2015-03-27 2015-08-05 国家电网公司 Ammeter and power supply circuit therein, and power supply control method inside the ammeter

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CF01 Termination of patent right due to non-payment of annual fee
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20140514

Termination date: 20171213