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Charging circuit with short-circuit protection and charger

A charging circuit and short-circuit protection technology, which is applied to battery circuit devices, current collectors, circuit devices, etc., can solve problems such as damage to the charging circuit, complex circuits, and no short-circuit protection function at the output of the charger, and achieve circuit cost savings. Effect

Active Publication Date: 2012-12-05
OCEANS KING LIGHTING SCI&TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The output of traditional chargers usually has no short-circuit protection function. When the output is accidentally short-circuited, the charging circuit will be damaged, and the damaged charger is usually irreparable
There is also an application-specific integrated circuit (IC) to perform short-circuit protection on the output of the charger, but the circuit is complicated and the cost is high

Method used

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  • Charging circuit with short-circuit protection and charger
  • Charging circuit with short-circuit protection and charger

Examples

Experimental program
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Effect test

Embodiment 1

[0019] Such as figure 1 As shown, the charging circuit with short circuit protection includes a charging module 10, a protection diode 20 and an anti-reverse diode 30, wherein: the charging module 10 includes a transformer rectification circuit 11, a control circuit 12, a switch circuit 13, a constant current circuit 14 and a sampling circuit 15, of which:

[0020] The input terminal of the transformer rectifier circuit 11 is connected with the mains, the input terminal of the control circuit 12 is connected with the output terminal of the transformer rectifier circuit 11 and the sampling circuit 15, the output terminal of the control circuit 12 is connected with the input terminal of the switch circuit 13, and the switch The output end of the circuit 13 is connected with the input end of the constant current circuit 14 , and the output end of the constant current circuit 14 is connected with the rechargeable battery through the anti-reverse diode 30 . The control circuit 12 ...

Embodiment 2

[0024] Such as figure 2 As shown, the charging circuit with short circuit protection includes a charging module 10, a protection diode D6 and an anti-reverse diode D2, wherein: the charging module 10 includes a transformer rectification circuit 11, a control circuit 12, a switch circuit 13, a constant current circuit 14 and a sampling circuit 15, of which:

[0025] The transformer rectification circuit 11 includes a transformer T1 and a rectifier D3, the primary coil of the transformer T1 is connected to the mains, the secondary coil is connected to the input terminals 1 and 3 of the rectifier D3, the output terminal 4 of the rectifier D3 is grounded, and the transformer T1 connects the 220V mains Converted to low voltage, the AC is converted to DC by the rectifier D3. The charging circuit also includes an isolation diode D1. The anode of the isolation diode D1 is connected to the DC power, and the cathode is connected to the output terminal 2 of the rectifier D3. The isolat...

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Abstract

The invention discloses a charging circuit with short-circuit protection, which comprises a charging module, a protection diode and an anti-reverse diode, wherein the charging module comprises a voltage transforming and rectifying circuit, a control circuit, a switch circuit, a constant current circuit and a sampling circuit; the input end of the control circuit is connected with the output end of the voltage transforming and rectifying circuit and the sampling circuit, and the output end of the control circuit is connected with the input end of the switch circuit; the control circuit controls on / off of the switch circuit according to the sampling voltage of the sampling circuit, the output end of the switch circuit is connected with the input end of the constant current circuit, the output end of the constant current circuit is connected with the charging battery by the anti-reverse diode, the anode of the protection diode is connected with the input end of the switch circuit, and the cathode of the protection diode is connected with the output end of the charging circuit, when the output end of the charging circuit is in short circuit, the voltage of the input end of the switch circuit is pulled down by the protection diode, so that the switch circuit is cut off. The charging circuit with short-circuit protection is simple and reliable, and saves the circuit cost.

Description

【Technical field】 [0001] The invention relates to a charging circuit, in particular to a charging circuit with short circuit protection and a charger. 【Background technique】 [0002] The output terminals of traditional chargers usually do not have a short-circuit protection function. When the output terminals are accidentally short-circuited, the charging circuit will be damaged, and such damaged chargers are usually irreparable. There is also an application-specific integrated circuit (IC) to perform short-circuit protection on the output terminal of the charger, but the circuit is complicated and the cost is high. 【Content of invention】 [0003] Based on this, it is necessary to provide a simple, reliable and cost-saving charging circuit with short-circuit protection. [0004] A charging circuit with short-circuit protection, including a charging module, a protection diode and an anti-reverse diode, the charging module includes a transformer rectification circuit, a con...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J7/02H02J7/10H02H3/08
Inventor 周明杰管伟芳
Owner OCEANS KING LIGHTING SCI&TECH CO LTD