DocumentCode :
3174590
Title :
Digital controller chip set for isolated DC power supplies
Author :
Prodic, Aleksandar ; Maksimovic, Dragan ; Erickson, Robert W.
Author_Institution :
Dept. of Electr. & Comput. Eng., Colorado Univ., Boulder, CO, USA
Volume :
2
fYear :
2003
fDate :
9-13 Feb. 2003
Firstpage :
866
Abstract :
This paper describes a digital controller chip set for high-frequency DC-DC power converters with galvanic isolation. The secondary-side controller includes an A/D converter and a transmitter that sends a digital error signal as serial data through an opto-coupler. The primary-side controller includes a serial-data receiver, a programmable digital PID regulator, and a high-resolution (10-bit) digital pulse-width modulator. The digital error signal transmission through the isolation boundary eliminates the problem of gain variation when the opto-coupler is used in linear mode. The chip set is tested as a replacement for a conventional analog current-mode controller in a 3.3 V, 20 A, 400 KHz DC power supply. Experimental results with the digital controller show improved dynamic responses compared to the responses obtained with the analog controller.
Keywords :
DC-DC power convertors; PWM power convertors; analogue-digital conversion; digital control; opto-isolators; power supplies to apparatus; programmable controllers; three-term control; 20 A; 3.3 V; 400 kHz; A/D converter; analog controller; analog current-mode controller; digital controller chip set; digital error signal transmission; digital pulse-width modulator; dynamic responses; galvanic isolation; high-frequency DC-DC power converters; isolated DC power supplies; linear mode; opto-coupler; primary-side controller; programmable digital PID regulator; serial data; serial-data receiver; transmitter; DC-DC power converters; Digital control; Error correction; Galvanizing; Power supplies; Pulsed power supplies; Regulators; Space vector pulse width modulation; Three-term control; Transmitters;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Applied Power Electronics Conference and Exposition, 2003. APEC '03. Eighteenth Annual IEEE
Conference_Location :
Miami Beach, FL, USA
Print_ISBN :
0-7803-7768-0
Type :
conf
DOI :
10.1109/APEC.2003.1179318
Filename :
1179318
Link To Document :
بازگشت