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batt bord help
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batt bord help

by geir102 on Mon Sep 07, 2009 1:51 pm

Hi!

I need to build something like the batt bord, and i have some questions..

1. VCC from the dc jack is connected to the usb pin 1, if the voltage is higher than 5v. How come this dosent blow ut the usb?

2. Will this still work if the circuit draws more then 500 mA??
geir102
 
Posts: 60
Joined: Sat Mar 29, 2008 3:01 pm

Re: batt bord help

by Chuck on Thu Sep 10, 2009 5:30 pm

1. Which battery board? The LM3622 on the LiPoly board, has power (positive DC) to Pin 8, not Pin 1.
I believe its rated to 24 volts. Though I'm in the club that says to not over supply circuits needlessly.
Pin 1 is the low voltage threshold detection select pin. Its all in the datasheet.
Chuck
 
Posts: 55
Joined: Sun Dec 14, 2008 6:34 am

Re: batt bord help

by geir102 on Wed Sep 16, 2009 7:40 am

i see a was a bit quick here :) I meant the LM3622 bord, and i meant pin 1 one the usb :)
geir102
 
Posts: 60
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Re: batt bord help

by Chuck on Thu Sep 17, 2009 4:12 pm

Thats simple, don't use the power supply and the usb at the same time. :)
Chuck
 
Posts: 55
Joined: Sun Dec 14, 2008 6:34 am

Re: batt bord help

by geir102 on Tue Sep 22, 2009 6:09 am

aha so no protection, thanks :)
geir102
 
Posts: 60
Joined: Sat Mar 29, 2008 3:01 pm

Please be positive and constructive with your questions and comments.