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专利名称：DC-to-DC converter using coupled inductor
current sensing and predetermined on time
发明人：Christopher A. Ludden,Clay A. Dunsmore申请号：US07/634252申请日：19901226公开号：US05101335A公开日：19920331
摘要：A DC-to-DC converter is operated in accordance with a predetermined primarycircuit ON time and a sensed predetermined secondary circuit current level to provideimproved charging performance and extended battery life. Energy is stored in theprimary of a coupled inductor when power in the primary, provided by a battery having aninternal impedance which varies over the battery's lifetime, is switched ON for apredetermined time t.sub.ON. Upon expiration of time t.sub.ON, power is switched OFF,whereupon stored energy is transferred to the secondary via a flyback type process, thuscharging a storage capacitor. A preventing means prevents a premature switching ON ofpower in the primary subsequent to the expiration of time t.sub.ON. The energy storagecycle repeats when current sensed in the secondary decreases below a predeterminedminimum current threshold.
申请人：EASTMAN KODAK COMPANY
代理人：Michael J. Balconi-Lamica
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