Smart Battery Monitor

The PS331 multichemistry smart battery monitors are advanced smart battery monitor ICs from PowerSmart, incorporating the latest Smart Battery System (SBS) Specification updates and revisions. Included is an advanced SMBus communications engine that is compliant with the SMBus V1.1 Packet Error Checking (PEC) CRC-8 error correction protocols. The PS331 implements updated firmware to process all the revised Smart Battery Data (SBData) V1.1 data values. The PS331 integrates an advanced RISC microprocessor, a precise 14-bit digital to analog converter, and an external serial EEPROM for storage of key operational parameters.

An output pin is provided that can be set to activate on an over-voltage or over-temperature condition. This ‘SAFEOUT’ pin can be used to activate a fuse or other safety device for added safety in battery pack designs. The PS331 can be easily customized for applications of Nickel or Lithium based battery cell chemistries using the external EEPROM. Upgrades to previously assembled battery packs are simple via the standard SMBus serial communications interface.

• Performs all major Li Ion, NiMH battery monitoring and reporting functions providing up to 1% accuracy in capacity measurement
• Additional output pin for over voltage or over temperature safety fuse operation (SAFEOUT)
• High accuracy measurement of charge / discharge current, voltage, and temperature with on-chip 14-bit integrating A/D
• Precise capacity reporting for all lithium and nickel chemistries using PowerSmart patented algorithms and 3D battery cell models
• 3D models and “learned” parameters stored in external EEPROM; fully field reprogrammable via SMBus interface
• Complete hardware and software development tools available