Switching power supply and over-temperature protection method

Details Switching power supply and over-temperature protection method Switching power supply and over-temperature protection method

2011-07-12

2011-07-12

Riley, Shawn (Department: 2838)

Electric power conversion systems

Current conversion

Including automatic or integral protection means

C363S056090, C363S074000, C363S080000, C363S097000, C323S370000

Reexamination Certificate

active

07978487

ABSTRACT:
A switching power supply includes an energy-storing device, a power switch, a driving circuit and a thermal sensing device. The energy-storing device is coupled to an input power source and controlled by the power switch to increase or decrease the power therein. The power switch has a control terminal connected to the driving circuit for switching. The thermal sensing device is connected to the control terminal of the power switch and powered by the driving circuit. When sensing an operation temperature exceeding a predetermined range, the thermal sensing device disables the driving circuit.

REFERENCES:
patent: 3617696 (1971-11-01), Reenstra et al.
patent: 4402298 (1983-09-01), Morita
patent: 5274208 (1993-12-01), Noda
patent: 6597588 (2003-07-01), Matsumoto

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