One of the battery charge status indication circuits
Source: InternetPublisher:containsmachine Keywords: Battery charging BSP transistor Updated: 2021/10/30
In order to monitor the working status of the charger, a charging status indicator can be set in the charger circuit.
The circuit is shown in the figure. When charging, the transistor VT is on and the light-emitting diode VL is on; when the battery is full,
VT is off and VL is off.
The detection resistance can be calculated according to the following formula: where j is the charging current. A.
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