How the TOP264 device will support 18V input voltage Posted by: Rahul on Wed, 10/27/2021 How the TOP264 device will support 18V input voltage Comments Hi Rahul, Thank you for showing interest in Power Integrations and its products. TOPSwitch devices will start up at 18Vdc drain voltage. You may also use our design tool, PI Expert, to verify your design together with your specifications. https://piexpertonline.power.com/ Do we have any ready application example to refer Hi Rahul, We currently do not have a design example that allows operation at 18Vdc. You may use our design tool, PI Expert, to generate and verify a design that meets your specifications. https://piexpertonline.power.com/ Hi, P.I expert does not allow <85V VIN. Done transformer design using PIXLs, Thanks.