DocumentCode :
2398536
Title :
A new linear regulator features switch mode overcurrent protection [for power supplies]
Author :
Mammano, R. ; Radovsky, Jonathan ; Harlan, George
Author_Institution :
Unitrode IC Corp., Santa Ana, CA, USA
fYear :
1989
fDate :
13-17 Mar 1989
Firstpage :
159
Lastpage :
164
Abstract :
A linear regulator control circuit for power supply applications is presented which, in addition to offering benefits such as low input-output differential and a precise reference voltage, features a unique and innovative approach to overload protection. By using duty-ratio, switch-mode protection, this circuit eliminates both the high internal dissipation of constant current limiting and the latch-up tendencies of limiting with current foldback. It is argued that while the power supply designer needs to incorporate foldback current limiting to reduce power dissipation, the customer needs constant-current limiting to insure reliable sharing. It is the contention of this work that what they both really need is duty-ratio protection
Keywords :
controllers; electric current control; overcurrent protection; power supplies to apparatus; control circuit; duty-ratio; foldback current limiting; linear regulator; overcurrent protection; overload protection; power dissipation; power supplies; switch-mode protection; Current limiters; Current supplies; Latches; Power supplies; Protection; Regulators; Switches; Switching circuits; Threshold voltage; Voltage control;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Applied Power Electronics Conference and Exposition, 1989. APEC' 89. Conference Proceedings 1989., Fourth Annual IEEE
Conference_Location :
Baltimore, MD
Type :
conf
DOI :
10.1109/APEC.1989.36964
Filename :
36964
Link To Document :
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