Dual-output switched-capacitor DC-DC converter with peseudo-three-phase swap-and-cross control and amplitude modulation mechanism

This paper presents an inductorless dual-output switched-capacitor DC-DC converter employing pseudo-three-phase swap-and-cross control (PTPSCC) and an amplitude modulation mechanism (AMM). The AMM circuit scales the amplitudes of the driving signals for the switches according to the loading conditio...

Full description

Saved in:
Bibliographic Details
Main Authors: Chia-Min Chen, Chun-Yen Chiang, Chen-Cheng Du, Fang-Ting Chou, Chung-Chih Hung
Format: Conference Proceeding
Language:English
Subjects:
Amplitude modulation
Capacitors
Clocks
DC-DC converter
output ripple
Power transistors
switched-capacitor
Switches
Voltage control
Online Access:Request full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:This paper presents an inductorless dual-output switched-capacitor DC-DC converter employing pseudo-three-phase swap-and-cross control (PTPSCC) and an amplitude modulation mechanism (AMM). The AMM circuit scales the amplitudes of the driving signals for the switches according to the loading conditions in order to minimize switching losses. To reduce output ripples, average charge distribution, and improve regulation, the PTPSCC circuit continuously switches power transistors to deliver enough charge to the outputs by keeping at least one flying capacitor connected to each output. The two outputs were regulated at 2.5 V and 0.8 V with input ranges of 1.7-2 V. The maximum output loading was 100 mA for both outputs. A power efficiency of 90.5% was achieved at a maximum total output power of 330 mW with a switching frequency of 500 kHz. The maximal peak-to-peak output ripple voltages for the two outputs under 100 mA load currents were suppressed to below 26 mV and 20 mV, respectively.
DOI:10.1109/ASSCC.2013.6690981