Electricity: electrical systems and devices – Safety and protection of systems and devices – With specific voltage responsive fault sensor
Patent
1996-07-17
1998-09-08
Gaffin, Jeffrey A.
Electricity: electrical systems and devices
Safety and protection of systems and devices
With specific voltage responsive fault sensor
361 18, 361115, H02H 324
Patent
active
058054014
ABSTRACT:
A sleep switch connected to a ramp pin, an undervoltage lockout circuit and a hysteretic differential comparator for use in the undervoltage lockout circuit are disclosed. An integrated circuit has a comparator that receives a voltage from the ramp pin which it compares with a control voltage. The sleep switch connected to the ramp pin is activated when the ramp pin is below a predetermined voltage threshold at which point it puts the integrated circuit into a low power consumption sleep mode. The undervoltage lockout circuit includes a detection leg connected between the supply terminal and ground. A current supply is enabled when the voltage across a resistive portion of a detection leg rises above a first threshold. A differential comparator is responsive to the detection voltage for enabling the current supply. The differential comparator may include three transistors arranged to provide first and second detection thresholds so as to establish a hysteresis.
REFERENCES:
patent: 3430227 (1969-02-01), Hillis
patent: 3573776 (1971-04-01), Dick et al.
patent: 3796896 (1974-03-01), Fulton et al.
patent: 3800168 (1974-03-01), Cochran
patent: 4030015 (1977-06-01), Herko et al.
patent: 4345218 (1982-08-01), Congdon et al.
patent: 4538101 (1985-08-01), Shimpo et al.
patent: 4554412 (1985-11-01), Smith
patent: 4564879 (1986-01-01), Bienstman
patent: 4667265 (1987-05-01), Stanojevic et al.
patent: 4733104 (1988-03-01), Steigerwald et al.
patent: 4740742 (1988-04-01), Gontowski, Jr.
patent: 4800331 (1989-01-01), Vesce et al.
patent: 4806787 (1989-02-01), Kato et al.
patent: 4823070 (1989-04-01), Nelson
patent: 4887022 (1989-12-01), Gontowski
patent: 4972136 (1990-11-01), Banura
patent: 4975823 (1990-12-01), Rilly et al.
patent: 5070322 (1991-12-01), Fujihira
patent: 5099381 (1992-03-01), Wilcox
patent: 5142217 (1992-08-01), Gontowski, Jr.
patent: 5256914 (1993-10-01), Boomer
patent: 5267118 (1993-11-01), Marshall et al.
patent: 5355123 (1994-10-01), Nishiura et al.
patent: 5367247 (1994-11-01), Blocher et al.
patent: 5565807 (1996-10-01), Ward
patent: 5610792 (1997-03-01), DeShazo
patent: 5627460 (1997-05-01), Bazinet et al.
patent: 5642027 (1997-06-01), Windes et al.
"UC3842 Provides Low-Cost Current-Mode Control", SGS Databook 1985.
"A New Integrated Circuit for Current-Mode Control", Power Concepts, Inc. Powercon 10, Mar. 22-24, 1983, San Diego, CA.
"Voltage Regulators" Product Description, Fairchild.
"Designing with a New Secondary Side Post Regulator (SSPR) PWM Controller for Multiple Output Power Supplies", Gedaly Levin, PCIM '95, Nurenberg, German, Jun. 20-22, 1995.
CS5101 Product Objective Specification dated Jun. 28, 1994 (Mar. 1994 APEC Conference).
"A New Secondary Side Post Regulator (SSPR) PWM Controller for Multiple Output Power Supplies", Gedlay Levin, APEC Conference, Mar. 5-9, 1995.
SSPR Block Diagram, Cherry Semiconductor Corporation, APEC Conference Mar. 5-9, 1995.
Levin Gedaly
Sanzo Christopher J.
Schuellein George E.
Theroux Arthur R.
Cherry Semiconductor Corporation
Gaffin Jeffrey A.
Jackson Stephen
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