Supports voltage and current measurement for 4–17 series cells. In this solution, the AFE achieves a voltage measurement accuracy of ±2.9 mV, which is currently the highest standard in the industry. Cell balancing adds measurement-oriented functionality to reduce software complexity; it includes multiple module self-test features; adds current open-circuit detection and internal reference source diagnostics; and provides a highly reliable system safety design.

• Feature
  

  -Supports 4–17 series lithium battery management

  -Supports 5-channel temperature measurement

  -Supports pre-charge and pre-discharge management

  -Supports charger and load connection detection

  -Supports internal self-diagnostics

  -Supports multiple operating modes

• Specifications
  

  KA49701 (1-chip battery monitoring IC)

  -Battery measurement accuracy: ±2.9 mV (industry-leading performance)

  -Ultra-low power consumption: down to 60 µA (measurement enabled)

  -High voltage tolerance: 90 V

  -High-safety design with enhanced current open-wire detection

  -High integration with minimal external components

  M253 (32-bit Arm® Cortex® -M23)

  -Operating Frequency: 48 MHz

  -Operating voltage: 1.75 V to 5.5 V

  -Operating temperature: –40 °C to +105 °C

  -EFT immunity: 4.4 kV

  -ESD (HBM): 7 kV

• System Block Diagram