Storage battery automatic charger circuit (1)

Published:2011/7/13 19:17:00 Author:TaoXi | Keyword: Storage battery, automatic charger | From:SeekIC

The circuit is as shown in figure 4-8. FU is the short circuit protection tube, LED1 is the power supply instruction, you can change the output voltage of IC1 by changing IC1, the center port of RP2 supplies the reference voltage to the positive phase input port of the voltage comparator IC2, R3 is the charge current sampling resistance, VD can be used to prevent the battery discharging, LED2 is the charging state instruction, C1 and C2 can be used to prevent the pulse interference. The control principle of the stop-charging is: the charging current decreases with the charging process, and the voltage drop of R3 decreases too. If it is lower than the set value of RP2, the electrical level of pin-2 is lower than the electrical level of pin-3, pin-6 has the low electrical level, VD is in the reverse biasing state, the charging current is 0.



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