Patent ID: 6342736
Filing Date: 2002-01-29
Classification: H02J

Abstract:
An inverterless circuit for an uninterruptible power supply that includes a battery, comprising:a. a clock circuit that generates a first periodic signal having a first frequency; b. an AC supply detection circuit that generates a line control signal that is un-asserted when an AC supply is capable of supplying power above a predetermined threshold and that is asserted when the AC supply is not capable of supplying power above the predetermined threshold; c. a control gate, responsive to the first periodic signal and to the line control signal, that generates a power control signal, the power control signal being a periodic signal having the first frequency when the line control signal is asserted and being zero when the line control signal is un-asserted; and d. a power transistor that is gated by the power control signal, and that periodically transfers current from the battery to a load at the first frequency.