MC33771BTB1AER2

The MC33771 is a Li-Ion Battery Cell Controller IC designed for automotive and industrial applications such as HEV, EV , ESS, UPS systems.The device performs ADC conversions on the differential cell voltages and currents as well as coulomb counting and temperature measurements. The device features embedded balancing transitors as well as a rich amount of diagnostics features to simplify applications. It communicates through SPI or transformer isolation to a microcontroller for processing and control. The MC33771 is designed for automotive and industrial applications and is compliant with the Qorivva MCUs Families

Supply Voltage

• 9.6 V = VPWR = 61.6 V operation, 70 V transient

Advanced Voltage and Temperature Measurement

• 14 Cell Voltage Measurement Channels
• Total Stack Voltage Measurement
• 7 ADC/GPIO/Temperature Sensor Inputs

Advanced Current Measurement

• Integrated Current sensor with PGA
• ±0.5% accuracy from milliamps to kiloamps
• Coulomb Counter

Onboard Passive Balancing

• Onboard 300mA Low Rdson passive cell balancing MOSFETs
• 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

Diagnostics, Functional Safety and Robustness

• OV/UV, OT/UT, OC fault verification
• Sleep mode OV/UV, OT/UT monitoring
• Single chip ASIL C capable
• Hot plug capable and