Analog Devices Inc. MAX17853 Power Management IC

The MAX17853 can measure 14x cell voltages and combine six temperatures or system voltage measurements with fully redundant measurement engines in 263µs or perform all inputs solely with the ADC measurement engine in 156µs. There are 14x internal balancing switches rated for >300mA for cell-balancing current, each supporting extensive built-in diagnostics. Up to 32x devices can be daisy-chained to manage 448x cells and monitor 192x temperatures.

Cell and bus-bar voltages ranging from -2.5V to +5V are measured differentially over a 65V common-mode range, with a typical accuracy of 1mV (3.6V cell, +25°C). If oversampling is enabled, up to 128x measurements per channel can be averaged internally with 14-bit resolution and combined with digital post-processing IIR (Infinite Impulse Response) filtering for increased noise immunity. The system can shut itself down in the event of a thermal overload by measuring its die temperature.

The MAX17853 uses an Analog Devices battery-management UART or SPI protocol for robust communications. It is optimized to support a reduced feature set of internal diagnostics and rapid-alert communication through both embedded communication and hardware-alert interfaces, supporting ASIL-D (Automotive Safety Integrity Level D) and FMEA (Failure Modes and Effects Analysis) requirements.

The MAX17853 is offered in a 10mm² LQFP (Low Profile Quad Flat Pack) package and features a wide operating temperature range of -40°C to +125°C.