Patent ID: 9236797
Filing Date: 2016-01-12
CPC Classification: H02M,H05B

Claim Text:
1. A system, comprising: a first converter for receiving a pre-stage input DC voltage from a power source, and providing a pre-stage output DC voltage which includes a first DC voltage or a second DC voltage; a modulator, coupled to the first converter, the modulator controlling the first converter; a second converter, coupled to the first converter; and a controller, coupled to the second converter, the controller controlling an operation mode of the second converter and notifying the modulator about the operation mode of the second converter, wherein: the modulator and the controller receive an external voltage indication signal indicating whether the pre-stage output DC voltage is the first DC voltage or the second DC voltage; the modulator controls the first converter to output the pre-stage output DC voltage based on the voltage indication signal; and the modulator notifies the controller about whether the pre-stage output DC voltage reaches a target level.