Title :
Design of a delta-sigma modulated switching power supply
Author :
Dunlap, S. ; Fiez, Terri
Author_Institution :
Sch. of Electr. Eng. & Comput. Sci., Washington State Univ., Pullman, WA, USA
Abstract :
An alternative control solution for a switching power supply using a delta-sigma (ΔΣ) modulator in place of a PWM controller is presented. The ΔΣ modulator controller does not exhibit the spikes in the noise spectrum characteristic of the PWM controller. A multi-bit ΔΣ modulator controller reduces the output noise floor below the conventional PWM controller noise floor. While the PWM is shown to have better power transfer efficiency, possible alternatives are suggested to increase the ΔΣ modulator controller efficiency
Keywords :
controllers; power control; sigma-delta modulation; switched mode power supplies; delta-sigma modulator controller; design; noise; power transfer efficiency; switching power supply; Circuits; Delta modulation; Filters; Frequency; Noise reduction; Power supplies; Pulse width modulation; Pulsed power supplies; Switches; Voltage control;
Conference_Titel :
Circuits and Systems, 1998. ISCAS '98. Proceedings of the 1998 IEEE International Symposium on
Conference_Location :
Monterey, CA
Print_ISBN :
0-7803-4455-3
DOI :
10.1109/ISCAS.1998.704243
