MCP165X 3W White LED Demo Board User’s Guide

DS51513A-page 6

 2004 Microchip Technology Inc.

The MCP1651R has a low input voltage status indicator that will provide visual

indication (via a red LED) when the input voltage is approaching 2.8V.

FIGURE 1-1:

MCP165X 3W White LED Demo Board Flow Chart

Power-Up

LED @ Full Power

Constantly On

Switch

Pressed

for 2 sec?

LED Dimmed by ~50%

by Toggling SHDN

LED Flashing @

Fast Rate

LED Flashing @

Slow Rate

Automatically

Run Through

Demo

Yes

No

No

Yes

No

Yes

Yes

No

Switch

Pressed

for 2 sec?

Switch

Pressed

for 2 sec?

Switch

Pressed

for 2 sec?