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To decrease the power consumption of a switching power supply, the most effective approach is to lower the switching frequency. Hence, the current mode pulse-width-modulation (PWM) controller used in a switching regulator must be capable of frequency modulation at light-load condition. The green mode circuit is designed in proposed current mode PWM control IC with the concept of off-time modulation...
A new three-phase, three-level dc to dc phase shifted pulsewidth modulation (PWM) converter is proposed for high power and high input voltage applications. Output voltage is controlled by incorporating phase shift PWM. Clocked gate signals of each leg are phase shifted by 2pi/3 from each other. Major features of the converter include: (1) outer two switches of each leg are turned on and off as zero...
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