L9961 Overview
Description
L9961 is part of a complete battery pack monitoring, balancing, and protecting system for Li-Ion and Li-Polymer cells in 3, 4 or 5 series configurations. The L9961 uses a high precision ADC to provide cell voltage, stack.
Key Features
- 2 μA shipment
- DEEP SLEEP mode current and 5 μA standby consumption (with VREG LDO active) standby consumption (with VREG LDO active)
- Integrated 3.3 V VREG LDO for supplying MCU and LEDs
- Measures cell voltage (3 to 5 cells), with over/undervoltage detection and balance undervoltage protection
- 12-bit voltage measurement with maximum error of ±15 mV in the [1.5 – 4.5] V range, for -40 °C < TJ < 105 °C
- Measures stack voltage, with over/under voltage detection and plausibility check vs. sum of cells
- Measures pack temperature via NTC, with over/undertemperature detection
- Ratiometric temperature measurement with ±0.8% max. gain error in the [0.2 – VREG] V range, for -40 °C < TJ < 105 °C
- Measures battery current, with Coulomb counting, overcurrent (both directions) and short-circuit in discharge protection
- 16-bit signed current measurement with 0.1% full scale error at room temperature
