Current detecting method and device for a DC-DC converter

Details Current detecting method and device for a DC-DC converter Current detecting method and device for a DC-DC converter

2006-08-22

2006-08-22

Patel, Rajnikant B. (Department: 2838)

Electricity: power supply or regulation systems

Output level responsive

Using a three or more terminal semiconductive device as the...

C323S285000

Reexamination Certificate

active

07095218

ABSTRACT:
A current detecting device and method that detects a variation in a current being supplied to a load in supplying variable DC power to the load via an inductor from a synchronous rectification DC-DC converter in which a high-side switch is connected to one electrode of a DC input voltage source and a low-side switch connected to the other electrode. The switches are turned on and off alternately during a prescribed switching period. A low-pass filter is connected to a signal line that leads from a connecting point of the inductor and the switches. An operation circuit detects an output current of the DC-DC converter by performing an operation on the difference between an output voltage of the low-pass filter and an output voltage of the DC-DC converter.

REFERENCES:
patent: 6127814 (2000-10-01), Goder
patent: 6310953 (2001-10-01), Yoshida et al.
patent: 6441597 (2002-08-01), Lethellier
patent: 2002-010627 (2002-01-01), None

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