MC33771 is a lithium-ion battery controller IC designed for automotive and industrial control applications such as HEV, EV, ESS, and UPS systems. characteristic:
ADC conversion for differential voltage and current of batteries, as well as Coulomb counting and temperature measurement
Embedded balanced transistors and rich diagnostic functions can simplify applications.
Support standard SPI and transformer isolation daisy chain (using MC33664) for communication with MCU to achieve data processing and control.
MC33771 is compatible with the MPC5xxx32-bit MCU series.
Data manual, security manual, and application tips with confidentiality agreement (NDA).
The main features of NXP battery cell controller MC33771B are as follows:
supply voltage
- 9.6V ≤ VPWR ≤ 61.6V working voltage, 75V transient voltage
Advanced voltage and temperature measurement
- 14 channels for measuring cell voltage
14 battery cells
Total stack voltage measurement
0.8 mV maximum total voltage measurement error
7 ADC/universal IO/temperature sensor inputs
Synchronous advanced current measurement
- Integrate current sensor with PGA
Accuracy up to ± 0.5%, range from milliampere to several thousand ampere
Built in Coulomb counter
Onboard passive balancing
- Onboard 300mA low on resistance passive cell balanced MOSFET with diagnostic function
Sleep pattern balance
Programmable balanced timer for each MOSFET
Isolate daisy chain or SPI communication
- 2.0Mbps, two pairs of twisted pair cables, differential, isolated
Addressable during initialization
4Mbps SPI
Diagnosis, functional safety, and stability
- OV/UV, OT/UT, OC fault verification
Sleep mode OV/UV, OT/UT monitoring
Supports ISO 26262 standard, up to ASIL D safety level
Supports hot swapping and AEC Q-100
