L9961 Overview
L9961 is part of a plete 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 voltage and temperature conversion via external NTC. Voltage monitoring functions are cyclically performed with a programmable loop time.
L9961 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
- 12-bit voltage measurement with maximum error of ±15 mV in the [1.5
- 4.5] V
- Measures stack voltage, with over/under voltage detection and plausibility
- 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