Charger circuit with output voltage compensation

Abstract

An output voltage compensation charger circuit comprises an AC / DC circuit, an output interface, an charging control circuit and a compensation circuit, wherein, the AC / DC circuit converts DC power into an AC power, and the AC power charges up the battery through the output interface after boosted through the transformer; the charging control circuit is used to increase the voltage of the output interface so as to accelerate charging the battery, and the voltage lost in the circuit compensation circuit is compensated by the compensation circuit; thus, the energy loss caused by the circuit internal resistance can be overcome, maintaining the charging effect of the charger.

Description

technical field [0001] The invention relates to a charger circuit with output voltage compensation. Background technique [0002] At present, most chargers have the function of two-stage charging, that is, users can choose to charge at a normal speed or fast charging; the so-called fast charging refers to directly inputting a large power supply to the battery connected to the charger To charge the battery, while the so-called normal speed charging is to charge the battery with a smaller power source. [0003] Please refer to Fig. 3, the general charger mainly converts an AC power supply 20 into a DC power supply by an AC-to-DC circuit 10, then sends it to a transformer 30 to boost the voltage to output a boosted power supply, and the boosted power supply is then passed through After rectification, a battery 50 is charged through an output interface 40, and a detection circuit 80 is connected to the output interface 40. The detection circuit 80 detects whether the battery 50...

AI Technical Summary

Problems solved by technology

[0004] However, in actual conditions, any line will have its internal resistance. When the boost power output by the transformer 30 is sent to the output interface 40 through the line, part of the energy will be consumed by the internal resistance of the line, causing the output interface 40 to actually output to the output interface 40. The power of the battery 50 is less than the boost power output by the transformer 30, which in turn affects the charging effect of the charger

Although the boosted power output by the transformer 30 can be further enhanced by the control circuit 91 to compensate for the energy consumed by the line to maintain normal charging of the battery 50, the energy loss caused by the internal resistance of the line is related to the power supply for charging the battery 50, so it is fixed The step-up power outputted by the booster transformer 30 cannot properly compensate the energy lost by the line, so the existing charger still has the aforementioned disadvantages to be overcome

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