Maxim Integrated Unveils Industry's First Data Acquisition System to Achieve ASIL-D Compliance for Voltage, Current, Temperature and Communication of a Battery Management System
MAX17852 battery monitor IC with integrated current sense amplifier offers up to 16% space savings and up to 20% cost savings
Designers of automotive battery management systems (BMS) can now deliver the highest level of safety for voltage, current, temperature and communication while also saving space and reducing solution cost, with the MAX17852 14-channel, high-voltage, ASIL-D data-acquisition system from Maxim Integrated Products, Inc.. Designed for integration within electric vehicles, hybrid electric vehicles and other transportation systems, the IC is ideal for smart junction box, 48 V and other automotive battery systems which can see voltages up to 400 V and beyond.
OEMs and electric vehicle manufacturers require that all battery systems meet the highest safety requirements set by the ISO26262 guidelines. Through comprehensive diagnostics and a safety-driven architecture, Maxim Integrated designed and manufactured the MAX17852 to enable customers to design their systems to meet the highest ASIL-D standards for voltage, current, temperature and communication. The small, cost effective IC also offers the highest accuracy for delivering voltage, current and temperature data with tight time synchronization. It allows a typical cell voltage measurement of ±0.45 mV at room temperature and a maximum of ±2 mV error in a temperature range of 5 ºC to 40 ºC, enabling car OEMs to get the most mileage range out of their batteries. With a current sense amplifier capability of +/-300 mV, and a gain setting up to 256 times and 0.3% current sense gain error, the MAX17852 provides the fastest, most accurate data for calculating power management, state of health and state of charge. The 14-channel battery data acquisition system integrates a current sense amplifier so that current information is acquired at the same time as cell voltage and temperature. The MAX17852 allows both hall effect sensor and shunt resistors to be used as sensing components.
Highest Safety: ASIL-D rating for voltage, current, temperature and communication enhances safety
Highest Accuracy: Measurement accuracy with best current sense amplifier gain error to allow accurate, time-aligned current measurements to potentially boost mileage
Smaller Size: High integration enables up to 16% smaller size than a discrete solution to save board space
Lower Cost: Integrated current sense amplifier provides up to 20% cost savings
Versatility: The first device that can be adapted to many applications with voltage, current and temperature sensing
Source: Maxim Integrated Products, Inc. press release