Switching regulator with high efficiency starting resistor...

Details Switching regulator with high efficiency starting resistor... Switching regulator with high efficiency starting resistor...

H - Electricity

02

M

321/29

H02M 3/335 (2006.01)

Patent

CA 1132195

ABSTRACT OF THE DISCLOSURE A switching regulator includes an inrush current pro- tective resistor and a starter circuit for a pulse width modu- lator consisting of a starting resistor and a capacitor. At initial starting mode, the inrush current protective resistor is connected to the starter circuit, and after starting both of the inrush current protective resistor and starting resistor are disconnected so as to reduce power dissipation or con- sumption thereby. At the same time, a DC voltage source for the pulse width modulator is derived from a rectified secondary voltage through the starting capacitor.

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