Electric power conversion systems – Current conversion – With starting arrangement
Patent
1999-11-05
2000-09-26
Berhane, Adolf Deneke
Electric power conversion systems
Current conversion
With starting arrangement
363 21, 363 97, H02M 3335
Patent
active
061250465
ABSTRACT:
A switching power supply having a high efficiency starting circuit uses a field effect transistor to provide initial starting current to a pulse width modulated signal generator within a switching control circuit. The field effect transistor (FET) has a drain connected to a source of supply voltage, a source connected to the PWM signal generator, and a gate connected to a feedback voltage that is derived from an output voltage of the switching power supply. During start up of the switching power supply, the FET provides current to the PWM signal generator. When the feedback voltage reaches a predetermined level, the FET supplies substantially near zero current to the PWM signal generator, thereby eliminating the electrical inefficiencies typically associated with a conventional switching power supply starting circuit.
REFERENCES:
patent: 4236198 (1980-11-01), Ohsawa et al.
patent: 4263645 (1981-04-01), Zellmer
patent: 5014178 (1991-05-01), Balakrishnan
patent: 5285369 (1994-02-01), Balakrishnan
patent: 5436820 (1995-07-01), Furmanczyk
patent: 5459652 (1995-10-01), Faulk
patent: 6002598 (1999-12-01), Seinen et al.
Jang Kyung-Oun
Kim Chang-Ho
Kim Dae-Bong
Shin Dong-Myeong
Berhane Adolf Deneke
Fairfield Korea Semiconductor Ltd.
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