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  3. NXP — MC33772C Lithium-Ion Battery Cell Controller IC

NXP — MC33772C Lithium-Ion Battery Cell Controller IC

 

NXP

NXP MC33772C 6-Channel Li-ion Battery Cell Controller IC

The MC33772C 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 with averaging up to 256 samples 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 up to 63 nodes in one daisy chain
  • Loopback support for one daisy chain

MC33772C supports ISO26262 with single chip ASIL C and up to ASIL D functional safety capability. With comprehensive integrated diagnostics, it enables low BOM & development cost for BMS with high functional safety target.

MC33772C is pin to pin compatible with MC33772B and compatible with MC3366X.

MC33772C Block Diagram

NXP – MC33772C Block Diagram

Features

High-performance integrated functions

Operating voltage:

  • 5V ≤ VPWR ≤ 30 V operation, 42V transient (for SPI communication)
  • 7V ≤ VPWR ≤ 30 V operation, 42V transient (for TPL communication)
  • 4.0 Mbps SPI or isolated 2.0 Mbps differential communication
  • Bi-directional transceiver to support up to 63 nodes in daisy chain
  • Life-time guaranteed high accuracy 6 cell voltage measurement channels with integrated averaging (up to 256 sample)
  • Total stack voltage measurement
  • 0,8 mV maximum total voltage measurement error
  • Synchronized Coulomb counter & current measurement with ±0.5% accuracy (±1500 A)
  • 7 ADC/GPIO/temperature sensor inputs
  • Onboard 300 mA passive cell balancing with diagnostics

Comprehensive integrated functional safety features

  • Designed to support ISO 26262, up to ASIL D system safety capability
Quality & robustness
  • AEC-Q100 automotive Qualified
  • Temp range: -40°C to 105°C
  • Operational low-power mode
  • Hot plug capable / EMC/ESD robustness

Target Applications

Automotive:

  • 12 V to high voltage battery packs
  • Battery junction box

Industrial:

  • E-bikes, E-scooters, E-forklifts
  • Energy storage systems (ESS)
  • Uninterruptible power supply (UPS)

MC33772B and MC33772C Differences

Parameter MC33772B MC33772C
Voltage Channels 3 – 6 (single meas.) 3 – 6 (averaging from 1-256)
Supply Vpwr Range (Max Transient) 6 V..30 V (40 V) 6 V..30 V (40 V)
Cell Terminal Input Voltage Range -0.3V to 5V -0.3V to 5V
Typical Measurement Error ± 0.8 mV ± 0.8 mV
Max Total Measurement Error (TME) for Cell Terminal Voltage
(After aging: MLS3 & 1000h HTOL)		 ± 3.9 mV(Vpwr=9.6~61.6V, Vcell=1.5~4.3V, -40~60°C) ± 3.9 mV(Vpwr=9.6~61.6V, Vcell=1.5~4.3V, -40~60°C)
Functional Safety Single-chip ASIL C
ASIL D Compliance at system level		 Single-chip ASIL C
ASIL D Compliance at system level
Isolated communication Speed 2 Mbps 2 Mbps
Communication Isolation Inductive Inductive, Capacitive (centralized systems)
Max Nodes per Daisy Chain 15 63
Node to node comm. Delay 0 < 950 ns
Loopback support with open line tolerance No Yes
4Mbps SPI communication Yes Yes
CRC Bit 8 8
Comms bit 40 48
Integrated Balancing <300 mA <300 mA
Balancing sleep mode Yes Yes
GPIO / Analog measurement inputs 7 7
Current Channels 1 1
Coulomb counter 1 1
Package 48-pin LQFP-EP (-40~105 °C) 48-pin LQFP-EP (-40~105 °C)
BOM cost 1(reference) 0.75

 

Development Tools

The MC33772C development kits provide an evaluation platform for designing Battery applications using the MC33772C Li-Ion battery cell controller IC

Easy to Use tools: Fast Evaluation of Device performance

The FRDM33772CSPEVB Evaluation Board (EVB) features the MC33772C, a 6-channel battery cell controller for automotive and industrial Li-ion battery applications. It supports cell voltage measurement, passive cell balancing and GPIOs.

The kit is designed to support customer development and evaluation. The device can be connected to NXP 6-cell battery emulator or a customer Li-ion battery module with 3~6 cells in series. The battery cell information is transferred to the microcontroller unit (MCU) through an SPI interface

NXP – FRDM33772CSPEVB Evaluation Board (EVB)

The KIT33772CTPLEVB Evaluation Board (EVB) features the MC33772C, a 6-channel battery cell controller for automotive and industrial Li-ion battery applications. It supports cell voltage measurement, passive cell balancing and GPIOs.

The kit is designed to support customer development and evaluation. The device can be connected to NXP 6-cell battery emulator or a customer Li-ion battery module with 3~6 cells in series. Up to 63 KIT33772CTPLEVB can be connected within a daisy chain. The battery cell information is transferred to the microcontroller unit (MCU) through an isolated differential communication bus using FRDMDUAL33664EVB

NXP – KIT33772CTPLEVB Evaluation Board (EVB)

Evaluation Kit Ecosystem – TPL Communication

NXP – Evaluation Kit Ecosystem – TPL Communication

Evaluation Kit Ecosystem – SPI Communication

NXP – Evaluation Kit Ecosystem – SPI Communication

 

NXP – MC33772C Battery Cell Controller