초록 ▼

A buffer battery power supply circuit is provided. In one embodiment, a battery charger circuit supplies a total output current which is delivered to both an active system and a battery. The total output current and the current delivered to a battery are sensed and compared to a preset threshold tot

A buffer battery power supply circuit is provided. In one embodiment, a battery charger circuit supplies a total output current which is delivered to both an active system and a battery. The total output current and the current delivered to a battery are sensed and compared to a preset threshold total output current signal and threshold battery current signal, respectively. The compared signals generate error signals which are provided as feedback to the battery charger circuit, so that the total output current can be controlled. In another embodiment, in addition to sensing the total output current and the battery current, the total output voltage is sensed and multiplied by the total output current, generating a total output power error signal. The error signals are provided as feedback to the battery charger circuit, so that the total output current and/or the total output voltage can be controlled.

대표청구항 ▼

[ What is claimed is:] [1.]1. A power supply systems comprising a charger circuit for generating a duty cycle for delivering power to an active system and a battery; a first feedback loop to sense the total output current generated by the charger circuit and a second feedback loop to sense the curre

[ What is claimed is:] [1.]1. A power supply systems comprising a charger circuit for generating a duty cycle for delivering power to an active system and a battery; a first feedback loop to sense the total output current generated by the charger circuit and a second feedback loop to sense the current delivered to said battery by said charger circuit; said first and second feedback loops including error circuits for generating an error signal to said charger circuit, wherein said charger circuit adjusting said duty cycle for adjusting the total output current delivered to the active system and the battery based on the value of said error signal.