Current share circuit for DC to DC converters

Details Current share circuit for DC to DC converters Current share circuit for DC to DC converters

1993-09-17

1996-05-28

Wong, Peter S.

Electric power conversion systems

Current conversion

Having plural converters for single conversion

307 82, 323225, H02M 3155

Patent

active

055218091

ABSTRACT:
A matched pair of npn transistor configured as emitter followers provide high impedance isolation for input error voltage busses in the current share circuitry used with parallel connected current programmed dc to dc converters. The matched emitter followers offer the bus isolation of buffer amplifiers but do not add the detrimental offset voltage to the input error signals. Trimmable current sinks are connected to the emitters of the transistors to guarantee equal VBE drops. Slight intentional unbalancing can be introduced using the current sources to improve stability. The current share circuitry equalizes main FET switching currents not load currents reducing FET stresses. A programmable differential amplifier is provided which can accommodate different regulator output voltages. Diagnostic circuitry monitors share circuitry operation.

REFERENCES:
patent: 3675114 (1972-07-01), Nercessian
patent: 4035715 (1977-07-01), Wyman et al.
patent: 4195333 (1980-03-01), Hedel
patent: 4257070 (1981-03-01), Sommer et al.
patent: 4276590 (1981-06-01), Hansel et al.
patent: 4308468 (1981-12-01), Olson
patent: 4414598 (1983-11-01), Nowell
patent: 4415960 (1983-11-01), Clark, Jr.
patent: 4425613 (1984-01-01), Shelly
patent: 4511814 (1985-04-01), Matsuo et al.
patent: 4542305 (1985-09-01), Blauschild
patent: 4609828 (1986-09-01), Small
patent: 4618779 (1986-10-01), Wiscombe
patent: 4635178 (1987-01-01), Greenhalgh
patent: 4675555 (1987-06-01), Okajima et al.
patent: 4717833 (1988-01-01), Small
patent: 4734844 (1988-03-01), Rhoads
patent: 4760276 (1988-07-01), Lethellier
patent: 4766364 (1988-08-01), Biamonte et al.
patent: 4856023 (1989-08-01), Singh
patent: 4866295 (1989-09-01), Leventis et al.
patent: 4877972 (1989-10-01), Sobhani et al.
patent: 4924170 (1990-05-01), Henze
patent: 4939393 (1990-07-01), Petty
patent: 5010470 (1991-04-01), Lipman et al.
patent: 5014179 (1991-05-01), Latos
patent: 5023746 (1991-06-01), Epstein
patent: 5027255 (1991-06-01), Zeitlin et al.
patent: 5036452 (1991-07-01), Loftus
patent: 5043603 (1991-08-01), Ohba et al.
patent: 5051608 (1991-09-01), Ten Pierick et al.
patent: 5087871 (1992-02-01), Losel
patent: 5136183 (1992-08-01), Moyal et al.
patent: 5142168 (1992-08-01), Matsunaga
patent: 5157269 (1992-10-01), Jordan et al.
patent: 5164890 (1992-11-01), Nakagawa et al.
patent: 5200643 (1993-04-01), Brown
patent: 5204809 (1993-04-01), Andresen
patent: 5376830 (1994-12-01), Ashley et al.
patent: 5428523 (1995-06-01), McDonnal

Affiliated with

Also associated with

Rating

Current share circuit for DC to DC converters does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Current share circuit for DC to DC converters, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Current share circuit for DC to DC converters will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-791810