Hybrid control techniques for series resonant converter

摘要

A DC to DC converter system, includes inverter circuitry having a first and a second switch, the inverter circuitry further configured to generate a first and a second gate control signal, the signals configured to open and close the first and second switch, respectively, and generate an AC signal from a DC input signal. The system further includes transformer circuitry configured to transform the AC signal into a sinusoidal AC signal, second stage circuitry configured to rectify the sinusoidal AC signal to a DC output signal, and hybrid control circuitry configured to modulate the first and second gate control signals, wherein the modulation comprises pulse frequency modulation (PFM) and pulse width modulation (PWM).

主权项

1. A DC to DC converter system, comprising:
inverter circuitry having a first and a second switch, said inverter circuitry further configured to generate a first and a second gate control signal configured to open and close said first and said second switch, respectively, and generate an AC signal from a DC input signal; transformer circuitry configured to transform said AC signal into a sinusoidal AC signal; second stage circuitry configured to rectify said sinusoidal AC signal to a DC output signal; and control circuitry configured to modulate said first and said second gate control signals, wherein said modulation comprises pulse frequency modulation (PFM) and pulse width modulation (PWM), the control circuitry configured to switch between the pulse width modulation (PWM) under first load conditions and the pulse frequency modulation (PFM) under second load conditions, the second load conditions being greater than the first load conditions.