The PMP40042 is a D-CAP Aux. isolated power supply reference design solution for the Telecom & Server applications. High integration and low switching loss: with the UVLO: OTP: OCP: SS and Prebias Start-up: the module enables a high efficiency for 48V system application. A low cost & compact transformer is embedded on the board. The board size is very compact (31mm * 11.9mm * 5mm).