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Old 12-18-2013, 04:56 AM #1
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Lightbulb RT9163 -Driver circuit help?

I'm wondering if anyone can help me out here, i've been going through my spare bits and i keep seeing a RT9163 SMD in alot of my CD/DVD drives.

My LM317's have been in the post for about a month now and im looking for some alternatives for low power laser drivers (no more than 250mA at most).

and so im asking if this Linear voltage regulator could fit into a modified LM317 circuit?

Datasheet: http://www.cheertech.com.tw/RichTek%.../DS9163-22.pdf

i dont mind if theyre in-efficient or anything i just want them to be able to power some IR and Red LD's ive got from 4x DVD-RW's.

any help and circuit designs are greatly appreciated.


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Old 12-18-2013, 05:28 AM #2
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Default Re: RT9163 -Driver circuit help?

Those won't work. You need the adjustable types.
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Old 12-18-2013, 05:32 AM #3
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Default Re: RT9163 -Driver circuit help?

Any idea's on alternate Circuits / Components that i might be able to make from scavenged parts? (mostly full computers) i have all the resistors and capacitors i need but i just cant find those regulators!
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Old 12-18-2013, 06:17 AM #4
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Default Re: RT9163 -Driver circuit help?

Look for the 1117 type regulators. But they also have versions that are fixed so you still need to check which version is present.

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Old 12-18-2013, 06:52 AM #5
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Default Re: RT9163 -Driver circuit help?

cant seem to find any of those, although looking on the web i've seen alot of Drivers for LED's and such that regulate some part of the current using Transistors and zener diodes.

could i possibly make a circuit from these ? i have 100 of these zener diodes and quite a few Transistors.

just trying to find some sort of circuit that can power a LD but not use a LM317 / 1117 etc etc.
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Old 12-18-2013, 07:27 AM #6
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Default Re: RT9163 -Driver circuit help?

Have a look around here:
Current Sources, Sinks and Mirrors in Audio

you can scale the circuits up for more current to use for LDs.

Last edited by djQUAN; 12-18-2013 at 07:29 AM.
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