UC3843 based and 12 V to 20 V efficient boost circuit
A circuit and main circuit technology, applied in output power conversion devices, electrical components, regulating electrical variables, etc., can solve the problem of difficult to meet the charging needs of high-power electronic products, and achieve the effect of improving conversion efficiency and ensuring safe and stable work.
Inactive Publication Date: 2013-08-14
HANGZHOU DIANZI UNIV
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Problems solved by technology
[0002] With the rapid development of the electronics industry, there are more and more types of mobile power supplies, and the output voltage of most mobile power supplies is 5 volts (V), which is difficult to meet people's charging needs for high-power electronic products.
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[0017] The present invention is further analyzed below in conjunction with accompanying drawing.
[0018] Such as figure 1 As shown, the present invention includes a temperature and over-discharge protection circuit 1, an output circuit 2, and a single-chip microcomputer control circuit 3; the output terminal of the temperature and over-discharge protection circuit 1 is connected to the input terminal signal of the output circuit 2, and the input terminal is connected to the single-chip microcomputer control circuit 3 The input terminal signal is connected, and the 12V power supply provides power to the temperature and over-discharge protection circuit 1, the output circuit 2, and the single-chip microcomputer control circuit 3.
[0019] Such as figure 2 As shown, the temperature and over-discharge protection circuit 1 includes a relay Relay, a MOS transistor Q1, a diode D1, and a resistor R1; after the first pin of the relay Relay is connected to the third pin and the catho...
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The invention discloses a UC3843 based and 12 V to 20 V efficient boost circuit. The output voltage of the conventional mobile power source is 5 V, which cannot meet the charging requirement of people for high-power electronic products. The circuit includes a temperature and overdischarge protection circuit, an output circuit and a singlechip control circuit, wherein the output end of the temperature and overdischarge protection circuit is in signal connection with the input end of the output circuit; the input end of the temperature and overdischarge protection circuit is in signal connection with that of the singlechip control circuit; a 12 V power source is used for charging the temperature and overdischarge protection circuit, the output circuit and the singlechip control circuit. When voltage of 12 V is input to the circuit, the circuit can output the voltage of 20 V through adopting a boost circuit topology circuit; a double parallel connection freewheel diode structure and a current detection ring circuit are adopted to improve the conversion efficiency of the output circuit, so that when the circuit outputs at the voltage of 20 V, the conversion efficiency is higher than 90%; and the adopted temperature and overdischarge protection circuit ensures the safe and stable operation of the circuit.
Description
technical field [0001] The invention belongs to the technical field of mobile power supplies, and in particular relates to a 12V to 20V high-efficiency boost circuit based on UC3843. Background technique [0002] With the rapid development of the electronics industry, there are more and more types of mobile power supplies, and the output voltage of most mobile power supplies is 5 volts (V), which is difficult to meet people's charging needs for high-power electronic products. Contents of the invention [0003] The purpose of the present invention is to provide a UC3843-based 12V to 20V high-efficiency boost circuit for the deficiencies of the prior art. [0004] The invention includes a temperature and over-discharge protection circuit, an output circuit, and a single-chip microcomputer control circuit; the output end of the temperature and over-discharge protection circuit is connected to the input end signal of the output circuit, the input end is connected to the input ...
Claims
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Inventor 秦会斌张京朱挺锋龚三三黎夏
Owner HANGZHOU DIANZI UNIV