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1. (WO2017066254) ADAPTIVE BUS VOLTAGE AUTO-SELECTION SYSTEM

Pub. No.:    WO/2017/066254    International Application No.:    PCT/US2016/056548
Publication Date: Fri Apr 21 01:59:59 CEST 2017 International Filing Date: Thu Oct 13 01:59:59 CEST 2016
IPC: H02M 7/12
G05F 1/10
Applicants: TEXAS INSTRUMENTS INCORPORATED
TEXAS INSTRUMENTS JAPAN LIMITED
Inventors: COHEN, Isaac
Title: ADAPTIVE BUS VOLTAGE AUTO-SELECTION SYSTEM
Abstract:
In described examples, an adaptive bus voltage auto-selection system (10) includes an input bridge (12) configured to rectify an AC input line voltage to generate a DC bus voltage. The system (10) also includes a voltage monitor (14) configured to monitor an amplitude of the AC input line voltage and to generate an activation signal based on the amplitude of the AC input line voltage relative to a predetermined reference voltage. The system (10) further includes an anti-series transistor switch pair (16) that is controlled via the activation signal to selectively couple and decouple the input bridge (12) to an output stage (18) to provide the DC bus voltage at a first amplitude based on a first state of the activation signal and at a second amplitude based on a second state of the activation signal, respectively.