Current mode PWM boost circuit and feedback signal sensing...

Details Current mode PWM boost circuit and feedback signal sensing... Current mode PWM boost circuit and feedback signal sensing...

2007-02-01

2009-11-03

Sterrett, Jeffrey L (Department: 2838)

Electricity: power supply or regulation systems

In shunt with source or load

Using choke and switch across source

C323S287000, C323S288000

Reexamination Certificate

active

07612543

ABSTRACT:
A feedback signal sensing method includes the steps of: providing a pulse width modulation (PWM) signal having a period; charging a capacitor by a current source during a pulse duration of the period, so as to form an equivalent slope compensation ramp signal; conducting an inductor current flowing from a boost inductor to flow through an equivalent resistor during the pulse duration of the period, so as to form an equivalent inductor current signal; and using a coupling characteristic of the capacitor together with the equivalent slope compensation ramp signal and the equivalent inductor current signal to form a feedback signal.

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patent: 2007/0108947 (2007-05-01), Liao

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