Lead -acid battery charging module CN3768 module charging module three -stage charging 12V constant current

Note: The default charging current is 200mA. If you need other charging current, please modify the RS1 resistor by yourself

CN3768 module related parameters and settings

Input voltage: 15-24VDC overcharge: 14.80VDC Fu charge voltage: 13.55VDC charging current: 4AMAX (set through RS1 on the board) CN3768 has a trickle, constant current, overcharging and floating charging mode, which is very suitable for 12V lead acidCharging the battery.In the over -charging and floating charging mode, the typical values ​​of charging voltage are 14.8V and 1355V, respectively; in the Hengliu charging mode, the charging current through the external resistance RS1 settings

1) Settings of charging current:

ICH = 0.12V One RS1 where: ICH is a constant current charging current

RS1 is the resistance required for the constant current on the board.

2)
Status indication:

The CN3768 has a leak -opening state indicator output CHRG tube foot.In the constant stream, constant current and over -charging, the chrg tube foot is pulled down by the internal transistor to the low level, and the chrg tube foot in other states is high -resistant.When the battery is not received to the charger, the CN3768 charges the output capacitor to the floating charging voltage and keeps it in the floating charging state.When the state indicates the function without the state, the chrg foot is received to the ground

The state indicates the status of the charger status corresponding to the state indicator port.This is the red LED connected to the chrg tube foot

Chrg tube foot

Low level (red LED bright) state description: trickle, constant current and overcharge mode

High -resistant state (red LED extinguishing) state description: Three possible cases of floating charging mode, or VCC foot voltage lower than low voltage lock lock voltage, or VCC pipe foot voltage lower than the BAT tube foot voltage

Remarks: For more relevant information, please refer to the CN3768 specification book (Baidu)