MC33771BSP1AE

The MC33771BSP1AE from NXP Semiconductors is a SMARTMOS lithium-ion battery cell controller IC. It is designed for automotive applications like hybrid electric (HEV) and electric vehicles (EV), as well as industrial uses such as energy storage systems (ESS) and uninterruptible power supply (UPS) systems.

This device performs ADC conversions of differential cell voltages and current, coulomb counting, and temperature measurements. Data is digitally transmitted via SPI or Transformer Isolation (TPL) to a microcontroller. It supports operation from 9.6 V to 63 V, with a transient rating of 75 V. The IC can manage 7 to 14 cells and offers a maximum total voltage measurement error of 0.8 mV.

Key features include isolated 2.0 Mbps differential communication or 4.0 Mbps SPI, synchronized cell voltage/current measurement with coulomb count, and total stack voltage measurement. It provides seven GPIO/temperature sensor inputs and a 5.0 V at 5.0 mA reference supply output. The device includes automatic over/undervoltage and temperature detection, integrated sleep mode monitoring, and onboard 300 mA passive cell balancing with diagnostics.

The MC33771BSP1AE is qualified in compliance with AEC–Q100 and designed to support ISO 26262 up to ASIL D safety systems. It is housed in a 64-LQFP (10x10) package and is suitable for surface mount applications. The operating temperature range is -40°C to 105°C (TA).