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LM213xb

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matrix0110

Post subject: LM213xb

Posted: Sat Nov 05, 2005 21:36

Joined: Tue Nov 02, 2004 15:00
Posts: 48

hi

http://forum.lcdinfo.com/viewtopic.php?t=659

Is it enough to a LM213xb display (negative voltage)

thanks

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csaba911

Post subject:

Posted: Sun Nov 06, 2005 1:13

Joined: Sat Jun 12, 2004 22:38
Posts: 22

You'll need at least -10 V, my crkt is is only give you -12 at no load and not more than -3-4 at 2mA load.

Csaba

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One~Zero

Post subject: Re: LM213xb

Posted: Sun Nov 06, 2005 3:52

Joined: Thu Dec 09, 2004 16:01
Posts: 218
Location: NH, USA

matrix0110 wrote:

hi

http://forum.lcdinfo.com/viewtopic.php?t=659

Is it enough to a LM213xb display (negative voltage)

thanks

What's the negative voltage requirement for your LCD? There are plenty of simple circuits for this type of thing, but helps to know what your requirements are. Post a data sheet if you have one.

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matrix0110

Post subject:

Posted: Sun Nov 06, 2005 8:35

Joined: Tue Nov 02, 2004 15:00
Posts: 48

hi

-10,5 V and (I think) 2mA (VEE) 35mA (IDD)

I see a voltage inverter with max767 or something like that, but I can't find :-(

(it gives more (-12) from +5V)

sorry for the mistakes

thanks

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matrix0110

Post subject:

Posted: Sun Nov 06, 2005 8:37

Joined: Tue Nov 02, 2004 15:00
Posts: 48

here is the datasheet:

http://www.datasheetarchive.com/search. ... sType=part

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matrix0110

Post subject:

Posted: Thu Nov 10, 2005 18:14

Joined: Tue Nov 02, 2004 15:00
Posts: 48

is it enough or not??

I see a schematic with max767 but now I cant find, can somebody show me?

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One~Zero

Post subject:

Posted: Thu Nov 10, 2005 18:56

Joined: Thu Dec 09, 2004 16:01
Posts: 218
Location: NH, USA

Look at the datasheet for the MAX635-637
http://pdfserv.maxim-ic.com/en/ds/MAX635-MAX637.pdf

On page 5 there is a circuit for a -10vdc out.

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matrix0110

Post subject:

Posted: Fri Nov 11, 2005 15:03

Joined: Tue Nov 02, 2004 15:00
Posts: 48

thanks

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