4 200 mA Time Charge 3S NiMH Design

Figure 4-1 provides a solution that will charge 3 series NiMH battery cells at 200 mA for 14 hours.

• R-ISET will set fast charge current to 200 mA, 1.5 kΩ.
• R-CHM_TMR will set chemistry to NiMH with a 14 hour charge timer, 11 kΩ.
• R-VSET will set the cell count to 3 and enable optional intermittent charge, 18 kΩ.
• /CE pin is connected to host MCU for external device control.
• R-TS is required, a 10 kΩ resistor is connected to GND to disable this function.
• STAT1/STAT2 LEDs are used together to indicate charge status and faults, they are optional.

This application supports medium capacity multi-cell NiMH batteries.

Figure 4-1 NiMH 200-mA Time Charge Design