NXP battery cell controller MC33771C, 14 channel lithium-ion battery cell controller integrated circuit. MC33771C 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 (averaging 256 samples), as well as Coulomb counting and temperature measurement
Embedded balanced transistors and rich diagnostic functions can simplify applications
Support standard SPI and transformer isolated daisy chain communication with MCU (via MC33664) to achieve data processing and control of 63 nodes in a daisy chain.
Support a daisy chain loop
The main product features of NXP battery cell controller MC33771C and 14 channel lithium-ion battery cell controller integrated circuit are as follows:
supply voltage：
9.6 V ≤ VPWR ≤ 61.6 V operating voltage, 75 V transient voltage
Advanced voltage and temperature measurement：
14 battery voltage measurement channels, integrated average value can reach 256 samples - (MC33771B has no average value)
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
Passive balance on board：
Onboard 300mA low on resistance passive cell balanced MOSFET with diagnostic function
Sleep pattern balance
Programmable balanced timer for each MOSFET
Independent daisy chain or SPI communication：
2.0 Mbps, two pairs of twisted pair cables, differential, isolated
Supports inductance and capacitance coupling - (only applicable to transformer coupling of MC33771B)
Each daisy chain has 63 nodes - (MC33771B has 15 nodes)
Supports one daisy chain loopback - (for MC33771B without loopback function)
Addressable during initialization
4 Mbps SPI
Diagnosis, functional safety, and stability：
OV/UV, OT/UT, OC fault verification
Sleep mode OV/UV, OT/UT monitoring
Supports ISO 26262, up to ASIL D safety level
Supports hot swapping and AEC Q-100
