Patent ID: 7408755
Filing Date: 2008-08-05
Classification: H02H

Abstract:
1. A DC voltage power control circuit comprising: input terminals; output terminals; current limiting circuit operable to limit the amount of current delivered from said input terminals to said output terminals to a predetermined value, said operation of said current limiting circuit being temperature dependent; said current limiting circuit comprising: compensation circuit coupled to one of said output terminals and to said current limiting circuit, said compensation circuit controlling said current limiting circuit in a manner that is temperature dependent, such that said temperature dependence of said current limiting circuit and said compensation circuit substantially cancel each other out; short circuit protection circuit coupled to said first semiconductor switch, said short circuit protection circuit being coupled to and controlling said off state of said first semiconductor switch; said short circuit protection circuit including a timer circuit generating a signal after said first semiconductor switch has been in said current limiting state for a predetermined period of time; said short circuit protection circuit responding to said timer circuit signal by causing said first semiconductor switch to enter said off state; and said short circuit protection circuit comprises: