ZSLS7031 Datasheet

© 2016 Integrated Device Technology, Inc.

16

January 26, 2016

3.4

Printed Circuit Board (PCB) Design Considerations

The guidelines in this section are strongly recommended when laying out application circuits. As for all switching

power supplies, especially those providing high current and using high switching frequencies, layout is an impor-

tant design step. If the layout is not well-designed, the regulator could show instability as well as EMI problems.

For additional information, refer to the IDT application note PCB Layout Design Guidelines for LED Driver Circuits

available at www.IDT.com.

bypass capacitors should be mounted as close to the ZSLS7031 as possible.

Switching signal traces should be kept as short as possible and not be routed in parallel to one another so as to

prevent coupling. Power ground and signal ground should be separated, and the traces of power ground should

be kept as short as possible.

Figure 3.3 shows, as an example, the layout of the ZSLS7031 Demonstration Board comprising a 20W isolated

flyback design on a 28mm x 71mm PCB area. Note: This board’s component labels are different from those in

previous schematics and equations. Figure 3.4 shows the corresponding circuit diagram.

Figure 3.3

ZSLS7031PCB-D1v1 Demonstration Board Layout