BATTERY CHARGING SYSTEM INCLUDING CURRENT OBSERVER CIRCUITRY TO AVOID BATTERY VOLTAGE OVERSHOOT BASED ON BATTERY CURRENT DRAW

摘要

According to one aspect of the present disclosure, there is provided a battery charging system. The battery charging system includes battery charging circuitry configured to provide charging current to a battery. The battery charging system further includes feedback circuitry configured to generate a feedback signal indicative of a battery charging condition, wherein the battery charging system is configured to control the battery charging current based on, at least in part, the feedback signal. The battery charging system further includes feed forward circuitry configured to adjust the feedback signal to decrease battery charging current when a decrease in battery current draw exceeds a threshold, and wherein the feed forward circuitry is configured to decrease the battery charging current faster than the feedback circuitry.

主权项

1. A battery charging system, comprising:
pulse width modulation (PWM) circuitry configured to generate a PWM signal having a controllable duty cycle; voltage feedback loop circuitry configured to generate a feedback signal to said PWM circuitry based on a battery charging condition, wherein said PWM circuitry is further configured to adjust said duty cycle of said PWM signal based on said feedback signal; and current monitoring circuitry configured to adjust said feedback signal when a decrease in battery current draw exceeds a predetermined threshold, wherein the current monitoring circuitry is configured to adjust the duty cycle of the PWM signal faster than the voltage feedback circuitry.