ST Launches Lithium Battery Management IC 'L9962'

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ST Launches Lithium Battery Management IC 'L9962'

Published2026.09.09 15:50

Improved Voltage Measurement Precision and Battery Lifespan with 12-bit ADC and Maximum 70mA Cell Balancing Current

STMicroelectronics (ST) has launched a new lithium battery management IC featuring a 12-bit ADC and high-current cell balancing capability. The product targets various portable and mobile equipment including cordless power tools, medical devices, lightweight mobility solutions, and UPS systems.

On the 9th, ST unveiled the L9962, which supports lithium-ion (Li-ion) and lithium polymer (Li-Po) battery packs configured in series with up to 10 cells maximum.

The company stated that it performs high-precision voltage measurement using a 12-bit ADC (Analog-to-Digital Converter) and reduces voltage deviation between cells with cell balancing current up to 70mA maximum, thereby improving battery condition.

Additionally, it supports 5µA standby mode and 2µA deep sleep mode, providing advantages in securing operation time.

The L9962 periodically measures each cell voltage based on programmable loop time, and automatically activates balancing and protection functions upon detection of overvoltage or low voltage conditions.

The method involves comparing total stack voltage and cell count through validity checking to determine any anomalies.

ST stated that it maintains high voltage measurement accuracy across the entire operating temperature range.

It incorporates a high-precision current sensing amplifier for stack current measurement using Coulomb Counting method and also features overcharge, overdischarge, and short discharge protection functions.

It provides current measurement accuracy of 0.25% across the entire temperature range, and production line calibration is possible with single-point calibration.

Thermal monitoring using NTC thermistors also detects overheating and low-temperature conditions.

Additionally, it features system integration functions including battery pack fuse management, configurable high-side/low-side pre-driver, and built-in 3.3V LDO (Low-Dropout Regulator).

The host system can read information such as State-of-Charge (SOC) and State-of-Health (SOH) through the I2C interface.

The L9962 is supplied in a 48-pin TQFP package measuring 7mm × 7mm, and is available for purchase starting at $2.89 per unit based on 1,000-unit orders.

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