Harness, Dickey & Pierce, P.L.C.
Power supplies having feedforward control using pulse modulation and demodulation
Example isolated AC-DC power supplies include a PFC converter coupled to an AC input, a DC-DC converter coupled between the PFC converter and a DC output, and a controller configured to control switching operation of the DC-DC converter. A pulse modulator is coupled to an output of the PFC converter to receive a signal representative of voltage ripple at the output of the PFC converter, and is configured to modulate a pulse signal based on an amplitude of the voltage ripple. A pulse demodulator is coupled to the pulse modulator to receive the modulated pulse signal, and is configured to demodulate the modulated pulse signal and provide a demodulated signal to adjust switching operation of the DC-DC converter. Also disclosed are methods for controlling isolated AC-DC power supplies.
Astec International Limited
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H02M Y02P H02M H02M H02M
inventional additional inventional additional inventional
Shi Jie Guang Quan Zhao Fu Qing Feng
Deng Li Zhou Liu