The ISL94208IRZ-T battery front end IC is designed for use with a microcontroller and features an analog front-end with overcurrent protection for multi-cell Li-ion battery packs. The ISL94208IRZ-T supports battery packs consisting of four to six cells in series and one or more cells in parallel.
Using an internal analog multiplexer, the ISL94208IRZ-T allows a separate microcontroller with an A/D converter to monitor each cell voltage plus internal and external temperature.
The ISL94208IRZ-T provides integral overcurrent and short-circuit protection circuitry, an internal 3.3V voltage regulator, internal cell balancing switches, and drive circuitry for external FET devices for control of pack charge and discharge.
Feature
- Software selectable overcurrent protection levels and variable protect detection times
- 4 discharge overcurrent thresholds
- 4 short-circuit thresholds
- 4 charge overcurrent thresholds
- 8 overcurrent delay times (charge)
- 8 overcurrent delay times (discharge)
- 2 short-circuit delay times (discharge)
- Automatic FET turn-off and cell balance disable on reaching external (battery) or internal (IC) temperature limit
- Automatic cell balance turn off on IC over-temperature
- Integrated charge/discharge FET drive circuitry
- Internal cell balancing FETs handle up to 200mA of balancing current for each cell
- Sleep operation with negative or positive edge wake-up
- <10μA Sleep mode
