02micro Inc.

O2 Micro, Incorporated

Xin Dong

Songtao Chen

Guo Xing Li

Ruichao Tang

Jiankui Guo

Chutao Zheng

Celin He

Guoxing Li

A circuit for charging a battery pack includes a transformer and a charger controller. The transformer is operable for receiving an input power and for providing a charging power according to a driving signal to charge the battery pack. The charger controller is operable for monitoring a status of the battery pack, for selecting a charging mode from multiple charging modes according to the status, and for generating the driving signal according to the charging mode to adjust the charging power. The charger controller further executes a state machine that stores data indicating predetermined battery statuses that cause saturation of the transformer, and that selects a protection mode in which said charging power is restricted if the status of the battery pack matches to one of the predetermined battery statuses.

Circuits and methods for battery charging

A circuit for charging a battery may include a switch operable for conducting a current flowing through the switch, and a first amplifier coupled to the switch and operable for adjusting the current according to an amount of power dissipation associated with the switch.

Charging systems that control power dissipation in a charging path

A circuit for charging a battery pack includes a power converter and a charger controller. The power converter is operable for receiving an input power, and for providing a charging power for charging the battery pack. The power converter provides galvanic isolation between input circuitry and output circuitry of the circuit. The input circuitry shares a first ground potential with the input power, and the output circuitry shares a second ground potential with the charging power. The charger controller in the input circuitry includes a modulator for generating a driving signal to drive the power converter and control the charging power.

Growing community of inventors

Shenzhen, China

Xin Dong