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MC33771BSP1AER2

Battery cell controller, 7-14 cells, 0.8mV accuracy, ASIL-D, AEC-Q100, TPL/SPI, HLQFP-64

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Manufacturer Part：

MC33771BSP1AER2

Package：

HLQFP-64 (10x10mm, EP)

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Description

Product Overview

The NXP MC33771BSP1AER2 is a SMARTMOS lithium-ion battery cell controller IC managing 7 to 14 cells with 0.8 mV maximum total voltage measurement error. It supports ISO 26262 ASIL-D functional safety and is AEC-Q100 qualified for automotive battery management systems.

Key Specifications

Cell Count 7 to 14 cells
Supply Voltage 9.6 V to 61.6 V (75 V transient)
Voltage Accuracy 0.8 mV max total error
Communication 2.0 Mbps TPL or 4.0 Mbps SPI
Balancing On-board 300 mA passive
GPIO/Temp 7 inputs
Functional Safety ISO 26262 ASIL-D
Operating Temperature -40°C to +105°C
Package HLQFP-64 (10x10mm)

Features

  • ISO 26262 ASIL-D functional safety
  • 0.8 mV max total voltage measurement error
  • 300 mA on-board passive cell balancing
  • Daisy-chain up to 15 nodes
  • Over/under voltage and temperature auto-detection
  • Open/short/leak fault diagnostics
  • Hot plug-in support

Applications

  • 48V and high-voltage battery packs (HEV/EV)
  • E-bikes and e-scooters
  • Energy Storage Systems (ESS)
  • Uninterruptible Power Supply (UPS)

The MC33771BSP1AER2 is a lithium-ion battery cell controller IC from NXP designed for high-voltage battery management systems. It can manage 7 to 14 series-connected cells with industry-leading 0.8 mV maximum total voltage measurement error. The device supports both isolated 2.0 Mbps differential TPL communication and 4.0 Mbps SPI. On-board 300 mA passive cell balancing with diagnostics, 7 GPIO/temperature sensor inputs, and a 5.0V/5.0mA reference output are included. The device is fully ISO 26262 ASIL-D compliant and AEC-Q100 qualified.

The MC33771B measures individual cell voltages through a precision analog front end with a 14-bit ADC. Cell balancing is performed by internal 300 mA discharge FETs across each cell, with diagnostic monitoring. Communication to the host MCU is via either isolated TPL (Transformer Physical Layer) differential signaling or direct SPI. The device supports daisy-chaining of up to 15 nodes for large battery packs. Fault detection includes over/under voltage, over/under temperature, open wire, and leakage faults, all meeting ISO 26262 ASIL-D diagnostic requirements.

Pin Name Type Description
1-14 C0-C14 Analog Cell voltage inputs
15-21 GPIO0-6 I/O General purpose / temp sense
22-25 SPI/COM Digital Communication interface
26 VPWR Power Main supply input
27 VREF Output 5.0V reference output
28-64 Other Mixed Balance, diagnostic, power pins
  • 48V mild-hybrid and high-voltage EV battery packs
  • E-bikes and electric scooters
  • Energy Storage Systems (ESS)
  • Uninterruptible Power Supply (UPS)
  • Grid-scale battery storage
Model Manufacturer Key Difference
MC33772B NXP Reduced cell count (up to 6)
MC33771C NXP Next generation revision
BQ79616 Texas Instruments TI 16-cell controller
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Quality is the core foundation of our long-term global cooperation. With over 20 years of experience in the electronic component industry, Materialparts has built a strict and standardized quality management system covering component sourcing, incoming inspection, full-batch testing, packaging and delivery. We are committed to delivering 100% genuine, high-reliability electronic components for industrial control, automotive electronics, consumer electronics and medical device industries, and fully safeguarding your production and R&D projects.

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Contact Information

Email: info@ic-vendor.com

Tel / WhatsApp: +86 13760382860

Service & Packaging

Materialparts is a professional electronic component supplier based in Shenzhen, China, with over 20 years of global trading experience. We integrate component procurement, quality inspection, technical support, customized packaging, and global delivery services to provide one-stop supply chain solutions. Our business covers industrial control, automotive electronics, consumer electronics, medical devices and other industries. We always adhere to genuine sources, stable supply and considerate after-sales service.

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Contact Information

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Tel / WhatsApp: +86 13760382860
Address: Room 2919, Guoli Building, Huaqiang North, Futian District, Shenzhen, Guangdong, China
 

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