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In this paper, a controller for a multiphase interleaved buck converter with alternate phase-shedding is realized. With phase-shedding control, the efficiency at low load condition is improved by turning-on appropriate number of phase(s), but the temperature on the active phase(s) is higher than the off phase(s) that cause the temperature unevenly distribution. To solve this problem, the alternate...
In this paper, a novel high step-down DC-DC converter is proposed. The voltage conversion gain of this converter is Vo/Vin=D2. By using the interleaved control, the output current ripple is reduced and the transient response is improved. The operating principles and small-signal analysis are discussed. Finally, a laboratory prototype circuit with input voltage 12 V and output 1.5 V / 50 A is implemented...
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...
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