MAX17853ACB/V+

Wesentliche Merkmale

1. High-Precision 14-Cell Voltage Measurement

• 14 differential cell voltage acquisition channels, 65V wide common-mode input range, supports 3S~14S series lithium battery packs
• Ultra-high measurement accuracy: ±1mV @ 25°C / 3.6V cell; ±4.5mV full temperature range (-40°C ~ +125°C)
• Dual redundant measurement architecture (ADC + independent comparator) to satisfy ASIL-D fault detection requirements
• Full pack bus-bar voltage simultaneous sampling without extra peripheral circuits

2. On-Chip High-Current Passive Cell Balancing

• 14 independent integrated balancing power switches, programmable balancing current up to 300mA per cell
• Multiple auto-balancing modes: driving mode, parking static balance, timer automatic equalization, emergency discharge mode
• Separate timer register for each cell to avoid over-discharge of single cells; supports odd/even group balance configuration

3. Multi-Channel Auxiliary Signal Acquisition

• 6 configurable auxiliary analog input pins: connect NTC temperature sensors, pack voltage, external GPIO status
• Built-in die internal temperature sensor with automatic thermal shutdown protection
• All analog channels support oversampling averaging (up to 128x) + digital IIR filtering to suppress EMC industrial noiseAnalog Devices

4. Isolated Daisy-Chain Communication Interface

• Dual optional communication protocols: dedicated BMS UART or standard SPI
• Capacitively isolated daisy-chain bus, up to 32 chips cascaded, supporting total 448 battery cells and 192 temperature sensors
• Max communication baud rate 2Mbps with automatic rate detection, PEC packet error check for transmission reliability
• Ultra-low 1.5μs per-chip transmission delay, hardware global fault alarm pin for fast MCU notificationAnalog Devices

5. Ultra-Low Power & Full Safety Protection

• Operating voltage range: 9V ~ 65V wide high-voltage battery rail input
• Power consumption: standby mode 2mA, shutdown leakage only 2μA to reduce static battery drain
• Multi-layer independent fault diagnosis: cell OV/UV, over-temperature, inter-cell mismatch, communication loss
• Complete FMEA safety design, meets automotive ASIL-D voltage/temp/communication safety standards

6. Package & Automotive Specifications

• Package: 64-pin LQFP, 10mm × 10mm body size surface mount
• Operating temperature: -40°C ~ +125°C (AEC-Q100 Grade 1 automotive grade)
• MSL 3 moisture sensitivity level, tray bulk packaging (+ suffix T for tape-and-reel mass production)
• Fully RoHS, halogen-free, SVHC compliant, factory pre-calibrated internal oscillator without external crystal

Typische Anwendungen