Driving circuit compatible with two different direct-current power supplies
A drive circuit, DC power supply technology, applied in the direction of electrical components, etc., can solve the problems of unsatisfactory use, single DC power supply method, incompatibility, etc., to reduce the current size, prolong the power supply time, and reduce heat generation.
Pending Publication Date: 2020-05-05
ZHEJIANG SUNSHINE MEIJIA LIGHTING CO LTD +1
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Problems solved by technology
However, when there is no commercial power for this kind of LED work light, usually only one kind of DC power supply can be selected for power supply, such as using a DC generator or a vehicle-mounted DC power supply or using a dry battery for power supply. When two or more DC power sources coexist, It is not compatible, so that the DC power supply method is relatively simple, and it cannot be used without the required DC power supply.
Method used
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Embodiment 1
[0022] A drive circuit compatible with two different DC power supplies, such as figure 1 with 2 As shown, it includes a high-voltage DC power supply 10, a low-voltage DC power supply 20, a voltage detection circuit 40, a first isolation diode D1, a second isolation diode D2, a current control circuit 50, a constant current control circuit 60, a voltage stabilizing circuit 70, a single-chip microcomputer 80, and The signal conversion compensation circuit 90, wherein the input terminals of the voltage detection circuit 40 are respectively connected to the high-voltage DC power supply 10 and the low-voltage DC power supply 20, and the output terminals of the voltage detection circuit 40 are respectively connected to the input terminal of the first isolation diode D1 and the second isolation diode D2 The input terminal of the first isolation diode D1 is connected to the input terminal of the current control circuit 50, the output terminal of the current control circuit 50 is connecte...
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The invention discloses a driving circuit compatible with two different direct-current power supplies. The circuit comprises a high-voltage direct-current power supply, a low-voltage direct-current power supply, a voltage detection circuit, a first isolation diode, a second isolation diode, a current control circuit and a constant current control circuit. The input end of the voltage detection circuit is connected with the high-voltage direct-current power supply and the low-voltage direct-current power supply. The output end of the voltage detection circuit is connected with the input ends ofthe first isolation diode and the second isolation diode. The output end of the first isolation diode is connected with the input end of the current control circuit, and the output end of the currentcontrol circuit is connected with the input end of the constant current control circuit. The output end of the second isolation diode is connected with the input end of the constant current control circuit. The output end of the constant current control circuit is connected with an LED load. The driving circuit provided by the invention is compatible with two different direct-current power supply modes, so that an LED working lamp is suitable for various different working conditions.
Description
Technical field [0001] The invention relates to the technical field of LED lighting drive circuits, in particular to a drive circuit compatible with two different DC power supplies. Background technique [0002] The LED work light is a kind of lighting product that can be used for indoor or outdoor lighting. The existing LED work light is usually powered by city power and cannot be used in places where the power is cut off or there is no city power. For this reason, LED work lights that are compatible with city power and direct current have appeared on the market. When there is city power, you can use city power to supply power, and when there is no city power, you can use DC power for power supply. But this kind of LED work light usually can only choose a DC power supply when there is no city power, such as a DC generator or a vehicle DC power supply or a dry battery for power supply. When two or more DC power sources coexist, It is not compatible, making the DC power supply mo...
Claims
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IPC IPC(8): H05B45/30H05B45/345
Inventor 丁英杰李阳徐泉江余彬
Owner ZHEJIANG SUNSHINE MEIJIA LIGHTING CO LTD