BQ24188YFFT

The BQ24188YFFT is a high-efficiency synchronous charge-pump, constant-current and constant-voltage linear charger for single-cell Li-ion, Li-polymer batteries. It is designed to charge single-cell Li-ion/Li-polymer batteries with a programmable charge current up to 2.8A. It is specified for an input voltage range from 4.5 V to 32 V. The BQ24188YFFT offers programmable charge current settings and optimal system cost.

The BQ24188YFFT is specifically designed to handle a wide input power range, making it suitable for a variety of applications. The device has a wide range of operation and excellent performance characteristics. This includes low quiescent current, low noise, low on-resistance and wide voltage and temperature range.

BQ24188YFFT Application Fields

The BQ24188YFFT can be used in a wide range of applications such as smart phones, tablets, portable digital devices, portable media players, wireless headsets, digital cameras, digital camcorders, electronic dictionaries and other portable electronic applications. It is ideal for use in applications that require precise control over the charging current and voltage.

BQ24188YFFT Working Principle

The BQ24188YFFT is a high-efficiency, synchronous charge-pump controller for Li-ion, Li-polymer batteries. It features adjustable charge current and voltage, allowing precise control of the charging process. The BQ24188YFFT provides three independent charging modes: prequalification, conditioning, and fast charge.

In prequalification mode, the battery is charged at a constant current, up to an adjustable prequalification voltage. As the battery voltage increases, the current is reduced to maintain the prequalification voltage. In conditioning mode, the voltage is held constant at an adjustable level; the current slowly reduces over time. The fast-charge mode operates at an adjustable constant current, with an adjustable voltage limit.

The input voltage range of the BQ24188YFFT is 4.5V to 32V. The input current is limited to a maximum of 2.8A with an adjustable voltage setting of 4.2V to 20V. The charge current is adjustable over the 0.1-2.8A range in 3 modes, allowing precise control of the charging process. The entire charging process is optimized for small form factor and minimal cost.

Conclusion

The BQ24188YFFT is a high-efficiency, synchronous charge-pump, constant-current and constant-voltage linear charger for single-cell Li-ion, Li-polymer batteries. It is specifically designed to handle a wide input power range, making it suitable for a variety of applications. It offers a wide range of operation and excellent performance characteristics including low quiescent current, low noise, low on-resistance and wide voltage and temperature range. It also provides programmable charge current settings and optimal system cost.