NXP Semiconductors MC33772 Li-ion Battery Cell Controller

NXP Semiconductors MC33772 Li-ion Battery Cell Controller is a 6-channel power management IC (PMIC) designed for automotive and industrial applications. This module is ideal for use in hybrid electric vehicles (HEVs), electric vehicles (EVs), energy storage systems (ESS), and uninterruptible power supply (UPS) systems. The MC33772 PMIC features analog-to-digital converter (ADC) conversions on the differential cell voltages and currents as well as coulomb counting and temperature measurements. The information is digitally transmitted through the SPI or transformer isolation (TPL) to a microcontroller for processing. Balancing transistors and diagnostics are integrated into the MC33772 to simplify application design. With functional verification and diagnostics, this NXP MC33772 solution supports ISO 26262 SafeAssure® functional safety standards for the automotive industry.

Features

Supply voltage
- 7.0V ≤ V_PWR ≤ 30V operation, 42V transient (daisy chain mode)
- 5.0V ≤ V_PWR ≤ 30V operation, 42V transient (SPI mode)
Advanced voltage and temperature measurement
- 6 cell voltage measurement channels
- Total stack voltage measurement
- 0.8mV maximum total voltage measurement error
- 7 ADC/GPIO/temperature sensor inputs
Synchronized advanced current measurement
- Integrated current sensor with PGA
- ±0.5% accuracy from milliamps to kiloamps
- Integrated coulomb counter
Isolated daisy chain or SPI communication
- 2.0Mbps, 2-wire twisted pair differential, isolated
- Addressable on initialization
- 4Mbps SPI

Onboard passive balancing
- Onboard 300mA Low R_DSON passive cell balancing MOSFETs with diagnostics
- Balancing in Sleep mode
- Programmable balancing timer for each MOSFET
Diagnostics, functional safety, and robustness
- OV/UV, OT/UT, OC fault verification
- Sleep mode OV/UV, OT/UT monitoring
- Supports ISO 26262, up to ASIL D safety capability
- Hot-plug capable
- Qualified in compliance with AECQ-100
- 48-pin LQFP or QFP package