By Renesas 114
Intersil's ISL94202 is a high integration battery front end that measures the cell voltages for 3- to 8-cells, has a high side current sense measurement, can measure up to two temperature sensors, can control high side nMOS protection FETs in a series charge/discharge configuration, and can control external passive cell balancing switches. The device can operate with an external microcontroller with communication controlled by the I2C serial bus or it can be used as a standalone protector. In standalone mode, the IS94202 protects the pack from overvoltage, undervoltage, pack short-circuit, pack over temperature, and large cell mismatches. The internal EEPROM non-volatile store can be user configured to program protection settings in the standalone mode to enable low cost packs without the need of an external microcontroller. Power consumption is 13 µA (typ) in sleep mode and less than 1 µA in power down mode enabling long term pack storage without fully discharging the battery cells.