lpcware

Lpcxpresso lpc1769 power problem

Discussion created by lpcware Employee on Jun 15, 2016
Latest reply on Jun 15, 2016 by lpcware
Content originally posted in LPCWare by ranaya on Wed Jun 27 22:21:58 MST 2012
Hi...

I got something strange when powering the xpresso board with an external supply. My analog circuit has a 5v regulator. I connected the 5v pin to VIN (EXT_POW) of the xpresso 1769 board(pin2). 2 LEDs (LED2 and another 1) start to blink continuously. But when I connect the USB cable 5v (VBUS) blinking dosent happen. What could be the reason ? Is it ok to supply regulator 5v to VIN ?? This is my schematic :

[IMG]https://dl.dropbox.com/u/16049803/sup.JPG[/IMG]

Waiting for ur quick replies :)

Thanx

Outcomes