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MAX17823B Datasheet(PDF) 1 Page - Maxim Integrated Products |
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MAX17823B Datasheet(HTML) 1 Page - Maxim Integrated Products |
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1 / 121 page  EVALUATION KIT AVAILABLE ________________________________________________________________________________________________________________________________________________________________ MAX17823B 12-Channel High-Voltage Data Acquisition System General Description The MAX17823B is a data acquisition system for the management of high-voltage battery modules. The system features a 12-bit SAR ADC that can measure 12 cell voltages and two temperatures in 161 µs. There are 12 internal switches for cell-balancing and extensive built-in diagnostics. Up to 32 devices can be daisy-chained together to manage 384 cells and monitor 64 temperatures. Cell voltages (0V to 5V) are measured differentially over a 65V common-mode range. Cell measurements have a typical accuracy of 2mV (3.6V cell, 25°C). If oversampling is enabled, up to 128 measurements per channel can be averaged internally with 14-bit resolution. The system can shut itself down in the event of a thermal overload by measuring its own die temperature. The system uses Maxim’s battery-management UART protocol for robust communications and when used in conjunction with the MAX17880 12-channel battery monitor, it is ideal for automotive battery- management systems that require a high safety integrity level. Applications • High-Voltage Battery Stacks • Electric Vehicles (EVs) • Hybrid Electric Vehicles (HEVs) • Electric Bikes • Battery-Backup Systems (UPS) • Super-Cap Systems • Battery-Powered Tools Benefits and Features • AEC-Q100 Grade 2 Temperature Range - -40°C to 105°C • Operating Voltage from 9V to 65V • Ultra-Low Power Operation - Standby Mode: 2mA - Shutdown Mode: 2µA • 12 Cell-Voltage Measurement Channels - 2mV Accuracy (3.6V, +25°C) - 5mV Accuracy (0°C to +45°C) - 10mV Accuracy (-40°C to +105°C) • 12 Cell-Balancing Switches - Up to 150mA per switch - Emergency Discharge Mode • Two Temperature Measurement Channels • Die Temperature Measurement • Automatic Thermal Protection • 29 Voltage Threshold Alerts - 12 Over-Voltage Faults - 12 Under-Voltage Faults - Two Over-Temperature Faults - Two Under-Temperature Faults - One Cell Mismatch Alert (highest cell versus lowest cell) • Four GPIOs • Built-in Diagnostics to Support ASIL D and FMEA Requirements • Battery-Management UART Protocol − Daisy-Chain up to 32 Devices − Communication Port Isolation − Up to 2Mbps Baud Rate (auto-detect) − 1.5µs Propagation Delay per Device − Packet-Error Checking (PEC) • Factory-Trimmed Oscillators − No External Crystals Required • 10mm x 10mm Package (64-pin LQFP) Ordering Information appears at end of data sheet. 19-6912; Rev 5; 9/19 |
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