NXP Semiconductors Lithium-Ion Battery Cell Controller

Battery Cell Controllers from NXP

NXP's Li-ion battery cell controllers sense vital cell characteristics (voltage, temperature, current) and provide highly accurate cell balancing.

It meets the requirements of automotive and industrial equipment, making it ideal for automotive battery management, energy storage systems, and uninterruptible power supply applications.

NXP Li-Ion Battery Cell Controller Solution Block Diagram

The lithium-ion battery cell controller solution provided by NXP consists of multiple ICs as shown in the diagram on the right.

・Cell controller: MC33771C, MC33772C

The MC33771C is capable of "cell voltage" and "cell balancing control" for 7 to 14 cells.

It has seven analog input pins capable of measuring temperature, and devices with a P in the model number have a current measurement function.

By connecting in a daisy chain, it is possible to control up to 800 cells.

- High-speed isolation transformer communication conversion IC: MC33664

This is a conversion IC that enables communication between a microcontroller and a transformer physical layer (TPL) isolation transformer.

・General-purpose automotive microcontrollers: S32K1, S32K3

By utilizing the S32 automotive microcontroller platform provided by NXP, development of automotive applications can be realized more smoothly.

Battery Cell Controller Lineup

function	MC33772C	MC33771C
Battery Cell	3 ~ 6	7 ~ 14
Supply voltage range (Max)	6 V ~ 30 V (40 V)	9.6 V ~ 61.6V (75 V)
Cell Input Voltage Range	-0.3 V ~ 5 V	-0.3 V ~ 5 V
measurement error	± 0.8 mV (Vcell =3.3 v Ta = 25°c)	± 0.8 mV (Vcell =3.3 v Ta = 25°c)
Total Measurement Error (TME) (After aging: MLS3 and 1000h HTOL)	± 3.9 mV Vpwr=6V..30V, Vcell=1.5V..4.3V, -40~85°C	± 3.9 mV Vpwr=9.6V..61.6V, Vcell=1.5V..4.3V, -40°C..85°C
Measurement averaging function	Configurable Averaging Samples 2n n=0..8, (1,2,4,..256)	Configurable Averaging Samples 2n n=0..8, (1,2,4,..256)
Functional safety	ASIL C ASIL D Compliance	ASIL C ASIL D Compliance
Communication method	TPL：2 Mbps SPI：4 Mbps	TPL：2 Mbps SPI：4 Mbps
Daisy Chain MAX Node	63	63
CRC Bit	8	8
Cell Balancing	<300 mA	<300 mA
Cell balancing sleep mode	Yes	Yes
GPIO / Analog measurement inputs	7	7
I2C Controller	EEPROM Only	EEPROM Only
Current Channels	1	1
Coulomb Counter	1	1
Package	48-pin LQFP-EP (-40~105°C)	64-pin LQFP-EP (-40~105°C)
Cell Controller document	Fact Sheet Product Summary	Fact Sheet Product Summary
Cell Controller Evaluation Board	KIT33772CTPLEVB (TPL) (User Manual) FRDM33772CSPEVB (SPI) (User Manual)	RD33771CDSTEVB (TPL) (User Manual) FRDM33771CSPEVB (SPI) (User Manual)
TPL conversion IC document Evaluation Board	MC33664 (Product Overview) FRDMDUAL33664EVB (User Manual)
Automotive Arm MCUs Evaluation Board	S32K1 (Fact Sheet)、S32K3 (Fact Sheet) S32K144EVB (User Manual)
Cell Battery Emulator Evaluation Board	BATT-6EMULATOR (User Manual) BATT-14AAAPACK (User Manual)	BATT-14CEMULATOR (User Manual) BATT-14EXTENDER (User Manual)