Cell Monitoring Units for Automotive
Compact, high-performance power solutions designed for fast charging and reliability
Overview
Introducing our advanced Cell Monitoring Unit, designed to support up to 16 cells in series and multiple chemistries such as Li-Ion, LiFePO4, and NMC. This unit features three 20-bit ΣΔ ADCs for precise sensing of cell voltage, pack voltage, current, temperature, and auxiliary signals, with ±1 mV ADC TME and ultra-low long-term drift. It provides high-accuracy cell voltage measurements within 15.625 μs for all cell channels, supports busbar connection, and includes low-power mode and cell balancing with up to 300 mA per channel.
The unit enables isolated differential daisy-chain communication at 1 Mbps, supports optional ring architecture for stackability, and offers wireless BLE communication at 2.4 GHz. Integrated DC-DC converter switches support a wide input voltage range of 6 V to 100 V, and 9 multipurpose GPIOs allow for various sensor connections and digital I/Os. Enhanced security is ensured through an authentication engine for secure communications, while comprehensive battery and cell protections include overvoltage (OV), undervoltage (UV), overtemperature (OT), undertemperature (UT), and open-wire detection.
Key features
- Fully integrated 16S cell with monitoring, balancing, and protection
- Integrated RISC-V MCU with H/W accelerators
- State of Charge (SOC) Estimation
- State of Health (SOH) Estimation
- SHA-256 Authentication
- Wireless NFC Interface
- Enhanced protections including voltage, current, and temp
- Integrated robust ESD/EMI/EMC
- EMI/EMC: CISPR25 class 5
- Extended temperature range -40 °C to +125 °C
- Standard QFN package
Block diagram
Related application
Battery Management
System
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