Date: 16/07/2009

TI's new battery fuel gauge IC supporting JEITA profile for portable computers

TI's introduces the battery fuel gauge integrated circuits (ICs) of bq20z4x and bq20z6x family with enhanced charging and includes the Japan Electronics and Information Technology Association (JEITA) profile.

The new battery fuel gauges uses TI's Impedance Track technology and provide more reliable capacity measurement for two- to four-cell battery packs used in laptops and netbooks, portable industrial and medical electronic equipment.

The bq20z4x and bq20z6x devices are pin-compatible with bq20z7x and bq20z9x series of products with Impedance Track. The bq20z45 and bq20z65 are single-package ICs with integrated battery protection, while the bq20z40 and bq20z60 are dual-package ICs requiring a companion bq29330 analog front end device. The bq20z6x family supports LED functionality.

Full configurability of all JEITA parameters:

Configurable according to temperature, charging currents and charging voltages
Charging voltage and cell over-voltage threshold varies with temperature
Charging current can be adjusted based on battery voltage and temperature

Other features of bq20z4x and bq20z6x are,

Cell voltage-based taper termination improves charge termination accuracy.
Provides enhanced cell imbalance detection in charge mode.
Two independent thermistor controls enable simultaneous monitoring of battery temperature and MOSFETs.
Access to lifetime data simplifies diagnostics.

Package:
bq20z45 and bq20z65: 38-pin TSSOP
bq20z40 and bq20z60: 20-pin TSSOP
bq29330: 30-pin TSSOP


Price:
bq20z45 and bq20z65: Each $4.40 in 1K pieces
bq20z40 and bq20z60: Each $3.40 in 1K pieces
bq29330: Each $1.00 in 1K pieces

For further details visit: www.ti.com/bq20z4x-pr