Electronic component for power supply and a power supply device

Details Electronic component for power supply and a power supply device Electronic component for power supply and a power supply device

2007-01-23

2007-01-23

Berhane, Adolf (Department: 2838)

Electricity: power supply or regulation systems

Output level responsive

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

Reexamination Certificate

active

11338711

ABSTRACT:
This invention provides a semiconductor integrated circuit for drive and a module for building a synchronous rectifier type switching regulator that is able to correctly detect and prevent a reverse current flowing through a coil (inductance element) during light load using a comparator and has a good power efficiency. In a synchronous rectifier type switching regulator including a reverse current detection circuit that is able to detect a state in which a reverse current flows through the inductance element (coil) and a reverse current prevention function, a switching element for synchronous rectification is formed by a plurality of parallel transistors and the transistors are controlled so that a part of them are not driven during light load.

REFERENCES:
patent: 6504351 (2003-01-01), Eagar et al.
patent: 6870354 (2005-03-01), Nishimaki
patent: 2006/0113980 (2006-06-01), Yoshida
patent: 2002-281743 (2002-09-01), None

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