Multiphase synchronous buck converter with improved power...

Details Multiphase synchronous buck converter with improved power... Multiphase synchronous buck converter with improved power...

Filed on

2005-05-17

Date issued

2005-05-17

Examiner

Nguyen, Matthew V. (Department: 2838)

Patent Class

Electricity: power supply or regulation systems

SubClass

Output level responsive

SubSubClass

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

Other Related Categories

C363S097000

Type

Reexamination Certificate

Status

active

Patent number

06894464

Description

ABSTRACT:
A multi-phase synchronous buck converter having plural single phase synchronous buck converter stages, connected together to provide an output current to a load. A sensing circuit in each converter stage includes a variable gain current sense amplifier that determines the current through the shunt MOSFET to generate an output signal representative of the output current provided by that converter stage. The gains of the current sense amplifiers in each converter stage are preset such that the output signals from all the amplifiers are substantially equal, thereby balancing the power loss in all the converter stages by adjustment of the output currents using varying current sense gains to compensate for variations in the RDS-ONof the shunt MOSFETS.

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patent: 6246220 (2001-06-01), Isham et al.
patent: 6437545 (2002-08-01), Sluijs
patent: 6437546 (2002-08-01), Kunii et al.
patent: 6469482 (2002-10-01), Jahanshir et al.
patent: 6522115 (2003-02-01), Greitschus

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