US 9,312,767 B2Granted

Reconfigurable multiphase power stage for switched mode chargers

AssigneeInfineon Technologies Austria AG

InventorsChristoph Sandner, Cheow Guan Lim, Matteo Agostinelli, Mark Schauer

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Abstract

Methods, devices, and integrated circuits are disclosed for providing a buck converter charger in a multiphase buck converter topology comprising at least a first phase, a second phase, and an alternative charging switch, wherein the first phase includes a first high-side switch and a first low-side switch and the second phase includes a second high-side switch and a second low-side switch. The methods, devices, and integrated circuits may control at least one phase to operate as a boost converter, control at least one phase to operate as buck converter, and close the alternative charging switch in the multiphase buck converter topology to connect an alternative charging source to a system voltage output, the alternative charging switch coupled to the first phase between the first high-side switch and the first low-side switch.

Claims20

Dependent claims

A method for a buck converter charger in a multiphase buck converter topology comprising at least a first phase, a second phase, and an alternative charging switch, wherein the first phase includes a first high-side switch and a first low-side switch and the second phase includes a second high-side switch and a second low-side switch, the method comprising:

controlling at least one phase to operate as a boost converter;
controlling at least one phase to operate as buck converter;
controlling a duty cycle of at least one of the at least one phase operating as the boost converter and the at least one phase operating as the buck converter to provide a first charging profile to a system voltage output;
closing the alternative charging switch in the multiphase buck converter topology to connect an alternative charging source to the system voltage output, the alternative charging switch coupled to the first phase between the first high-side switch and the first low-side switch;
and
controlling a duty cycle of at least one of the at least one phase operating as the boost converter and the at least one phase operating as the buck converter to provide a first charging profile to a system voltage output.

3 more elements

A multiphase buck converter comprising:

a first phase including a first high-side switch and a first low-side switch;
a second phase including a second high-side switch and a second low-side switch;
an alternative charging switch;
and
a controller configured to:
control at least one phase to operate as a boost converter;
control at least one phase to operate as buck converter;
control a duty cycle of at least one of the at least one phase operating as the boost converter and the at least one phase operating as the buck converter to provide a first charging profile to a system voltage output;
close the alternative charging switch in the multiphase buck converter to connect an alternative charging source to the system voltage output, the alternative charging switch coupled to the first phase between the first high-side switch and the first low-side switch;
and
control a duty cycle of at least one of the at least one phase operating as the boost converter and the at least one phase operating as the buck converter to provide the second charging profile to a system voltage output.

8 more elements

Dependencies are inferred from the claim text.

Facts

Application: 14/099,411Filed 6 Dec 2013
Published: US 2015/0162828 A111 Jun 2015
Granted: 12 Apr 2016
Term ends: Not estimatedThe source records don’t support an estimate.

Classification10 codes

H02M 3/1584
Including plural semiconductor devices as final control devices for a single load: with a plurality of power processing stages connected in parallel
H02J 4/25
Networks integrating separated AC and DC power sections: for transfer of electric power between AC and DC networks, e.g. for supplying the DC…
H02J 7/00
Circuit arrangements for charging or discharging batteries or for supplying loads from
H02J 7/02
Circuit arrangements for charging or discharging batteries or for supplying loads from batteries: for charging batteries from AC mains by converters