Isolated Constant Power Converter Using the HV9922
Many applications require the use of a low cost, low power, bias supply. In consumer products such as televisions and audio/video equipment, a bias supply powers the remote control and logic as the main power converter is turned off. White goods, such as washer/dryers and countertop appliances require very low power for the logic and relay control, as the motors or heating elements are powered from the AC input.
HV9922, isolated constant power converter, design note