BQ2004ESNTR

The BQ2004ESNTR from Texas Instruments is a versatile battery charger IC that provides comprehensive fast charge control functions. It is suitable for charging nickel-cadmium or nickel-metal hydride batteries, supporting multi-chemistry types.

Key features include hysteretic PWM switch-mode current regulation, pre-charge qualification of temperature and voltage, and configurable LED outputs for battery and charge status indication. Fast-charge termination is supported by voltage, maximum temperature, and maximum time. The device also offers optional top-off charge and pulsed current maintenance charging.

This IC is designed for easy integration into systems or can be used as a stand-alone charger for batteries with one or more cells. It operates over a temperature range of -20°C to 70°C and comes in a 16-SOIC surface mount package. The supply voltage is rated at 5.5V.

The BQ2004E and BQ2004H Fast Charge ICs provide comprehensive fast charge control functions together with high-speed switching power control circuitry on a monolithic CMOS device. Integration of closed-loop current control circuitry allows the bq2004 to be the basis of a cost-effective solution for stand-alone and system-integrated chargers for batteries of one or more cells. Switch-activated discharge-before-charge allows bq2004E/H-based chargers to support battery conditioning and capacity determination. High-efficiency power conversion is accomplished using the bq2004E/H as a hysteretic PWM controller.