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The MC33771 is a Li-Ion battery cell controller IC designed for automotive and industrial applications such as HEV, EV, ESS, UPS systems. Featuring:

ADC conversions on the differential cell voltages and currents as well as coulomb counting and temperature measurements.
Embedded balancing transistors and diagnostics to simplify applications.
Support standard SPI and transformer isolated daisy chain communication (with MC33664) to an MCU for processing and control.
The MC33771 is compliant with MPC5xxx 32-bit MCU families.

Supply Voltage
- 9.6 V ≤ VPWR ≤ 61.6 V operation, 75 V transient
Advanced Voltage and Temperature Measurement
- 14 Cell Voltage Measurement Channels
- Total Stack Voltage Measurement
- 0.8 mV 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
Onboard Passive Balancing
- Onboard 300mA Low Rdson passive cell balancing MOSFETs with diagnostics
- Balancing in Sleep mode
- Programmable balancing timer for each MOSFET
Isolated Daisy Chain or SPI communication
- 2.0 Mbps, 2 wire twisted pair differential, isolated
- Addressable on initialization
- 4Mbps SPI
Diagnostics, Functional Safety and Robustness
- OV/UV, OT/UT, OC fault verification
- Sleep mode OV/UV, OT/UT monitoring
- Support ISO 26262, up to ASIL D safety capability
- Hot plug capable and AEC Q-100
Product Longevity Program
- This product is included in the NXP Product Longevity program ensuring a stable supply of products for your embedded designs. MC33771B is included in the 15-year program

NXP solutions meet the stringent requirements EV charging systems, with accurate power measurement, device management and data security.

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