Non-polar safe charger circuit

Abstract

The invention relates to a non-polar safe charger circuit in the battery charging circuit field. The technical scheme includes that a triac is serially connected to an output end of a power transformer B and provided with an input anode and an output anode connected to two polarity output ends respectively, a polarity output end of a polarity identification circuit is connected to a pin 1 and a pin 4 of an IC (integrated circuit) through a resistor R2, a pin 2 and a pin 3 of the IC are connected to another polarity output end, a control pole G is connected to a pin 6 and a pin 7 of the IC, and the second anode of the triac is connected to a diode D1 and a diode D2 which are opposite in polarity and then connected to a pin 8 and a pin 5 of the IC through a R1, so that an automatic polarity identification and conversion circuit is formed. The non-polar safe charger circuit is simple in structure and convenient in use. A charger can be protected during short circuit of output ends, any pole of batteries can be switched in for correctly charging the batteries, and the non-polar safe charger circuit is especially suitable for charging of mobile phone batteries, storage batteries and the like. (The IC can be a photocoupler, an optical coupling relay and an optical coupling triac, and the pin 1, the pin 2, the pin 3 and the pin 4 of the IC are positive light-emitting diodes respectively.

Description

Technical field: [0001] The invention relates to a stepless safety charger circuit in the field of battery charging circuits. Background technique [0002] There are many types of battery chargers on the market, but they must be connected according to the correct polarity of the battery and the power supply, and the polarity output terminal must not be short-circuited, otherwise the battery or charger will be burned, or even a fire may be caused. Summary of the invention: [0003] The purpose of the present invention is to provide a non-polar safety charger circuit that automatically recognizes the polarity of the battery in view of the defects in the prior art. [0004] The technical solution is: a bidirectional thyristor is connected in series from the output end of the power transformer B, one anode is input and the other anode is output to both ends of the polarity output, and the polarity identification circuit is connected to IC1 and 4 pins through the resistance R2 from the p...

AI Technical Summary

Problems solved by technology

[0002] At present, there are many kinds of battery chargers on the market, but they must be connected according to the correct polarity of the battery and the power supply, and the polarity output terminals cannot be short-circuited, otherwise the battery or charger will be burned, and even cause a fire.

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