JAJST23 June 2024 BQ41Z50
ADVANCE INFORMATION
The device manages its supply voltage dynamically according to the operation conditions. Normally, the BAT input is the primary power source to the device. The BAT pin should be connected to the positive termination of the battery stack. The input voltage for the BAT pin ranges from 3V to 28V.
The VCC pin is the secondary power input, which activates when the BAT voltage falls below minimum VCC. This enables the device to source power from a charger (if present) connected to the PACK pin. The VCC pin should be connected to the common drain of the CHG and DSG FETs. The charger input should be connected to the PACK pin.
The BAT input requires a 1μF capacitor connected to VSS and placed as close to the BAT pin as possible. The BAT input also requires a diode between the top of the battery stack and the input capacitor so the input capacitor is not discharged when PACK is shorted to VSS.
The VCC input does not require a capacitor, but if one is added, a 1μF capacitor should be connected as close to the VCC pin as possible.