MC33775A Datasheet | NXP Semiconductors

description The MC33775A is a lithium-ion battery cell controller IC designed for automotive applications, such as hybrid electric vehicle (HEV) and electric vehicle (EV). It can be used in industrial applications, such as energy storage system (ESS) and uninterruptible power supply (UPS) systems. The device measures differential high precision cell voltages as well as temperatures. Additionally, the device provides an extensive set of passive cell voltage balancing features to equalize the individual cell voltages across the battery stack. The device offers serial peripheral interface (SPI) and an isolated daisy chain interface for munication with the host MCU. The MC33775A offers increased safety level and a low bill of materials. 1.2 Features and benefits - AEC-Q100 grade 1 qualified: - 40 °C to +125 °C ambient temperature range - ISO 26262 ASIL D support for cell voltage, module voltage, and temperature measurements - Cell voltage measurement - 4 to 14 cells per device - Supports bus bars with ±5 V input voltage - 16-bit resolution and ±1 m V typical measurement accuracy with ultra low long-term drift - 120 µs synchronicity of cell voltage measurements - Integrated configurable digital filter - External temperature and auxiliary voltage measurements - Eight analog inputs - 5 V input range, configurable as absolute or ratiometric - 16-bit resolution and ±5 m V typical measurement accuracy - Integrated configurable digital filter - Module voltage measurement - 9.6 V to 65 V input range - 16-bit resolution and 0.3 % measurement accuracy - Integrated configurable digital filter - Internal measurement - Two redundant internal temperature sensors - Supply voltages - External transistor current - Cell voltage balancing - 14 internal balancing field effect transistors (FETs), up to 300 m A per channel (max) - Simultaneous passive balancing of all channels - Global balancing timeout timer - Timer controlled balancing with individual timers with 10 s resolution and up to 45...