Title :
Digitally controlled low-EMI switching converter with random pulse position modulation
Author :
Wu, Jui-Chi ; Mu, Chin-Wei ; Yang, Chun-Hung ; Tsai, Chien-Hung
Author_Institution :
Dept. of Electr. Eng., Nat. Cheng Kung Univ., Tainan, Taiwan
Abstract :
A fully digital controlled low-EMI switching converter combining RPPM (random pulse position modulation), our improved version of hybrid DPWM (digital pulse width modulator) and AEDPWM (area-efficient DPWM) schemes is proposed to achieve low-EMI (electromagnetic interference) with reduced area and power consumption. A FPGA-controlled prototype buck converter operating at 1 MHz switching frequency with 1.8 V input voltage and 0.6-1.2V output voltage is presented to demonstrate the technique. The resulting switching noise suppression capability is up to 18 dB in average.
Keywords :
PWM power convertors; electromagnetic interference; field programmable gate arrays; interference suppression; pulse position modulation; switching convertors; FPGA-controlled prototype buck converter; RPPM; area-efficient DPWM; digital pulse width modulator; digitally controlled low-EMI switching converter; electromagnetic interference; field programmable gate arrays; frequency 1 MHz; hybrid DPWM; input voltage; output voltage; power consumption; random pulse position modulation; switching frequency; switching noise suppression; voltage 0.6 V to 1.2 V; voltage 1.8 V; Digital control; Digital modulation; EMP radiation effects; Electromagnetic interference; Energy consumption; Pulse modulation; Pulse width modulation; Pulse width modulation converters; Switching converters; Voltage;
Conference_Titel :
Solid-State Circuits Conference, 2009. A-SSCC 2009. IEEE Asian
Conference_Location :
Taipei
Print_ISBN :
978-1-4244-4433-5
Electronic_ISBN :
978-1-4244-4434-2
DOI :
10.1109/ASSCC.2009.5357164
