bq2028

www.ti.com bq2028 SLUSB22B – OCTOBER 2012 – REVISED NOVEMBER 2012 4Kb EEPROM with Single-Wire HDQ Interface and Temperature Sensor Check for Samples: bq2028 FEATURES 1 Serial Non-Volatile Memory (NVM) – 512 Byte (4Kb) EEPROM – Provides Battery Pack NVM storage for bq27505-E1 Fuel Gauge: – Manufacturing Data – Operational History – Resistance Tables – State of Health Information Single Wire HDQ Communications Port Integrated 2.5V LDO Linear Regulator – Ultra-low power “shutdown” mode (1µA Typical) via auto-timeout and/or host command – Wake up from shutdown via HDQ break Internal Die-Temperature Sensor – ±5°C Range = –40°C to 85°C – Raw AD to Temperature Conversion Performed by Host Firmware Package – 12-pin, 1490 × 2350 µm WCSP (YZG), 0.625mm Max Thickness, 0.5mm Pitch DESCRIPTION The Texas Instruments bq2028 serial 4Kb nonvolatile memory (EEPROM) with integrated temperature sensor and LDO linear regulator provides pack-side memory storage and temperature monitoring for a single-cell system-side battery fuel gauge solution such as the bq27505-E1. The bq2028 communicates with the bq27505-E1 gauge over a single-wire HDQ interface with a minimal overhead protocol yet ensures error free data transfer. REGIN bq2028 2.5-V LDO VDD HDQ HDQ and control 512 x 8b EEPROM Internal temperature sensor VSS 1 Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products a...