Electric power conversion systems – Current conversion – Including d.c.-a.c.-d.c. converter
Patent
1996-03-26
1998-01-20
Krishnan, Aditya
Electric power conversion systems
Current conversion
Including d.c.-a.c.-d.c. converter
H02M 3335
Patent
active
057106975
ABSTRACT:
A power supply controller implementing frequency foldback and volt-second duty cycle clamp features. An oscillator timing capacitor is charged with a fixed current and is discharged with a fixed current when the output voltage is above a predetermined level and with a decreasing current when the output voltage falls below the predetermined level, so as to decrease the power supply operating frequency during short circuit or overload fault conditions. A volt-second duty cycle clamp circuit limits the duty cycle to a maximum value which is independent of the tolerance of a capacitor which sets the maximum duty cycle as a function of the power supply input voltage.
REFERENCES:
patent: 3660751 (1972-05-01), Bulling
patent: 3911352 (1975-10-01), Slack
patent: 4017786 (1977-04-01), Jensen
patent: 4020408 (1977-04-01), Grant
patent: 4127894 (1978-11-01), Bishop et al.
patent: 4352153 (1982-09-01), Voyer
patent: 4386311 (1983-05-01), Bafaro
patent: 4438485 (1984-03-01), Voigt
patent: 4453206 (1984-06-01), Voight
patent: 4455526 (1984-06-01), Miller
patent: 4459539 (1984-07-01), Cordy, Jr.
patent: 4498128 (1985-02-01), Peterson et al.
patent: 4616301 (1986-10-01), Small
patent: 4630187 (1986-12-01), Henze
patent: 4634956 (1987-01-01), Davis et al.
patent: 4678984 (1987-07-01), Henze
patent: 4713740 (1987-12-01), Drabing
patent: 4715001 (1987-12-01), Deem et al.
patent: 4816740 (1989-03-01), Maier
patent: 4823070 (1989-04-01), Nelson
patent: 4858052 (1989-08-01), McDonnal
patent: 4872100 (1989-10-01), Diaz
patent: 4885674 (1989-12-01), Varga et al.
patent: 4891744 (1990-01-01), Yamamoto et al.
patent: 4931717 (1990-06-01), Gray et al.
patent: 5019957 (1991-05-01), Wilkinson
patent: 5077652 (1991-12-01), Faley
patent: 5101175 (1992-03-01), Vaisanen
patent: 5138250 (1992-08-01), Capel
patent: 5177676 (1993-01-01), Inam et al.
patent: 5245520 (1993-09-01), Imbertson
patent: 5282123 (1994-01-01), Boylan et al.
patent: 5321348 (1994-06-01), Vinciarelli et al.
patent: 5325062 (1994-06-01), Bachand et al.
patent: 5335162 (1994-08-01), Martin-Lopez et al.
patent: 5378935 (1995-01-01), Korhonen et al.
patent: 5392206 (1995-02-01), Peterson et al.
patent: 5410467 (1995-04-01), Smith et al.
patent: 5418709 (1995-05-01), Lukemire
patent: 5446417 (1995-08-01), Korhonen et al.
patent: 5457624 (1995-10-01), Hastings
patent: 5481178 (1996-01-01), Wilcox et al.
Unitrode Integrated Circuits Corporation, "Average Current Mode PWM Controller", UC1848, UC2848, UC3848 preliminary data sheet, Nov. 1994, pp. 6/254-6/261.
Richard Redl, et al., "Overload-Protection Methods for Switching-Mode DC/DC Converters classification, Analysis, and Improvements", IEEE 1987, pp. 107-118.
Brian P. Erisman, et al., Toko America, Inc./ IC Design Center, "A Novel Primary-Side Controller and an Error Signal Isolator in Low Cost Five-Pin Packages", IEEE 1993, pp. 1-11.
Toko Inc., "Primary Side Controller", TK75001/75003, data sheet, May 1995, pp. 1-8.
Motorola, "Advance Information High Performance Current Mode Controller", MC44602, data sheet, not dated, pp. 3/419-3/434.
National Semiconductor, "LM3101 Secondary-Side PWM Controller", data sheet, Sep. 1993, pp. 1-18.
Unitrode Integrated Circuits Corp., "Primary Side Controller", UC7501/3-2 UC7501/3-3; data sheet, Jan. 1995, pp. 6/461-6/463.
Cooke Philip R.
Wiggenhorn John R.
Krishnan Aditya
Unitrode Corporation
LandOfFree
Power supply controller having frequency foldback and volt-secon does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Power supply controller having frequency foldback and volt-secon, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Power supply controller having frequency foldback and volt-secon will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-730028