bq2003 is a nickel cadmium or nickel-metal hydride battery fast charge and conditioning circuit, which supports switch-mode current regulation or external regulator gate control, and can be easily integrated into the system or used alone.
The BQ2003 is a monolithic CMOS device designed to provide comprehensive fast charge control functions along with high-speed switching power control circuitry. It supports the charging and conditioning of one or more cells in nickel cadmium or nickel-metal hydride batteries, offering features such as hysteretic PWM switch-mode current regulation or gated control of an external regulator.
The device includes safety mechanisms for fast-charge termination based on temperature rise rate (∆T/∆t), negative delta voltage (- ∆V), maximum voltage, maximum temperature, and maximum time. It also provides direct LED outputs to display battery and charge status and supports an optional top-off charge phase.
The device is used for fast charging and conditioning of nickel cadmium or nickel-metal hydride batteries.
Termination can be triggered by rate of temperature rise, negative delta voltage, maximum voltage, maximum temperature, or maximum time.