MAXREFDES1277

The MAXREFDES1277 reference design enables quick evaluation of the MAX17852/53 for 48V two-Wheeler battery management applications (BMS).

This design showcases capabilities of the MAX17852/53 like individual 14-cell voltage measurements, pack voltage, temperature (up to four sensors using general purpose inputs/outputs [GPIOs]), pack current (MAX17852 only) measurement, and passive cell balancing.

The MAX17852/53 supports ASIL-D requirements for cell voltage, temperature, current, communication, and failure mode effects analysis (FMEA).

Other features include the following:

• 3 to 14 cell voltage measurement with ±2mV accuracy at 5°C to 40°C
• Supports flexi pack configuration
• Pack current measurement using external current sense resistor
• Passive cell balancing up to 300mA with internal switch with odd or even cell balancing scheme (single cell or group)
  • Auto cell balancing configuration with undervoltage (UV) threshold and timer options
  • Manual cell balancing configuration
• Four configurable auxiliary inputs for temperature, voltage, or GPIO
• Internal die temperature measurement
• Individually configurable safety alert
  • Overvoltage (OV), undervoltage, overtemperature and undertemperature faults
  • One cell-mismatch alert
• Selectable universal asynchronous receivertransmitter (UART) or serial peripheral interface (SPI)
• UART configurations with packet error checking (PEC)
  • Dual UART configuration with redundancy
  • Single UART configuration
• Single-side component placement
• Compatible with MAX17852EVKIT software along with MINIQUSB board

Table 1 shows an overview of the design specification.

This document describes the hardware shown in Figure 1.