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US 9,590,495 B2Granted
Holdup time circuit and method for bridgeless PFC converter
AssigneeFuturewei Technologies, Inc.
InventorsDianbo Fu, Hengchun Mao, Bing Cai
Life of this patent
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Abstract
An embodiment holdup time circuit of a bridgeless power factor correction circuit comprises a charge device, an energy storage apparatus and a discharge device. The charge device comprises a first terminal coupled to a bridgeless power factor correction circuit and a second terminal coupled to the energy storage apparatus. The discharge device comprises a first terminal coupled to the energy storage apparatus and a second terminal coupled to the bridgeless power factor correction circuit.
Claims20
A circuit comprising:
- a charge device comprising
- (a) a first terminal coupled to a bridgeless power factor correction circuit;
- and
- (b) a second terminal coupled to an energy storage apparatus;
- a discharge device comprising
- (a) a third terminal coupled to the energy storage apparatus;
- and
- (b) a fourth terminal coupled to the bridgeless power factor correction circuit;
- the energy storage apparatus;
- and
- the bridgeless power factor correction circuit comprising
- (a) a first boost converter, a second boost converter and a first switch coupled between an input of the first boost converter of the bridgeless power factor correction circuit and ground;
- and
- (b) a second switch coupled between an input of the second boost converter of the bridgeless power factor correction circuit and ground.
11 more elements
A system comprising:
- a bridgeless power factor correction circuit comprising
- (a) a first boost converter coupled between an input ac source and an output;
- (b) a second boost converter coupled between the input ac source and the output;
- (c) a first switch coupled between an input of the first boost converter and ground;
- (d) a second switch coupled between an input of the second boost converter and ground;
- (e) a first surge protection diode coupled between the input of the first boost converter and the output;
- and
- (f) a second surge protection diode coupled between the input of the second boost converter and the output;
- a charge device comprising
- (a) a first terminal coupled to the bridgeless power factor correction circuit;
- and
- (b) a second terminal coupled to an energy storage apparatus;
- a discharge device comprising
- (a) a third terminal coupled to the energy storage apparatus;
- and
- (b) a fourth terminal coupled to the bridgeless power factor correction circuit;
- and
- the energy storage apparatus.
15 more elements
A method comprising:
- charging an energy storage apparatus through a charge device, wherein the charge device is coupled between a bridgeless power factor correction circuit and the energy storage apparatus;
- detecting a dropout of an input ac source;
- and
- discharging the energy storage apparatus through a discharge device, wherein the discharge device is coupled between the energy storage apparatus and an input of the bridgeless power factor correction circuit.
1 more element
Dependencies are inferred from the claim text.