Power Integrations provides a recommended PCB layout in their application notes and evaluation boards. It's essential to follow these guidelines to minimize electromagnetic interference (EMI) and ensure proper thermal performance.
The input capacitor should be selected based on the input voltage, ripple current, and ESR requirements. A low-ESR ceramic capacitor with a voltage rating of at least 1.5 times the maximum input voltage is recommended.
The maximum junction temperature (Tj) for the CAP018DG-TL is 150°C. However, it's recommended to design for a maximum Tj of 125°C to ensure reliable operation and minimize thermal stress.
To ensure EMC, follow proper PCB layout and design guidelines, use a shielded transformer, and add EMI filters as necessary. Additionally, ensure that the device is properly grounded and that the input and output cables are properly routed.
The recommended output capacitor value and type depend on the specific application requirements. A general guideline is to use a low-ESR ceramic capacitor with a value of 10-22 μF and a voltage rating of at least 1.5 times the output voltage.
CAP018DG-TL datasheet
by Power Integrations
