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7

iP2003

The PCB layout and bypassing issues have been addressed with the internal design of the iP2003. One

of the most critical elements of proper PCB layout with iP2003 is the placement of the external input

bypass capacitors and the routing of the connecting power tracks. The iPOWIR Block will function

normally without any additional external input bypass capacitors. However, the addition of the external

capacitors will improve the long term reliable operation of the block.

PCB Layout Guidelines

It is recommended that the designer uses the following guidelines:

1.

The diagram below suggests the addition of the input bypass capacitors either on the top side of

the PCB (capacitors C1-C4) or top and bottom side (C5, C6), if placement on the bottom side is

feasible. Although there is a certain degree of bypassing inside the iP2003, these external

capacitors must be placed as close to the iPOWIR device as possible.

2.

In the diagram below, observe the routing of the power tracks that connect the external bypass

capacitors.

3.

Provide a mid-layer solid ground plane with connections to the top through vias.

4.

Refer to IR application note AN-1029 to determine the size of the vias and the copper weight and

thickness when designing the PCB.