halogen supply

star882 · 14th January 2010, 04:03 AM

I'm reverse engineering the power supply out of a 50w halogen lamp in order to modify the power supply for other uses. The design is practically identical to the ones I have found online except it has a 0.22uF ceramic capacitor parallel to the output. What is that for? Is it part of a resonant circuit?

Jaac · 14th January 2010, 01:13 PM

Maybe this document will help you

http://www.st.com/stonline/products/...re/an/3707.pdf

gr

star882 · 14th January 2010, 01:46 PM

I already looked at that. The one I have is almost identical except it has that capacitor parallel to the output.

Jaac · 14th January 2010, 02:21 PM

Maybe a kind of load when no lamp is connected ?

coloradosound · 14th January 2010, 02:56 PM

Quote:

Originally Posted by star882

I already looked at that. The one I have is almost identical except it has that capacitor parallel to the output.

Probably to remove power supply noise.

14th January 2010, 04:03 AM	#1
star882 diyAudio Member Join Date: Mar 2007	halogen supply I'm reverse engineering the power supply out of a 50w halogen lamp in order to modify the power supply for other uses. The design is practically identical to the ones I have found online except it has a 0.22uF ceramic capacitor parallel to the output. What is that for? Is it part of a resonant circuit? __________________ "Fully on MOSFET = closed switch, Fully off MOSFET = open switch, Half on MOSFET = poor imitation of Tiffany Yep." - also applies to IGBTs!

14th January 2010, 01:13 PM	#2
Jaac diyAudio Member Join Date: Oct 2002 Location: Steenwijk	Maybe this document will help you http://www.st.com/stonline/products/...re/an/3707.pdf gr __________________ The right tool for the right job, a very nice Solarboat \|\| Ready for a groupbuy ? CLick

14th January 2010, 01:46 PM	#3
star882 diyAudio Member Join Date: Mar 2007	I already looked at that. The one I have is almost identical except it has that capacitor parallel to the output. __________________ "Fully on MOSFET = closed switch, Fully off MOSFET = open switch, Half on MOSFET = poor imitation of Tiffany Yep." - also applies to IGBTs!

14th January 2010, 02:21 PM	#4
Jaac diyAudio Member Join Date: Oct 2002 Location: Steenwijk	Maybe a kind of load when no lamp is connected ? __________________ The right tool for the right job, a very nice Solarboat \|\| Ready for a groupbuy ? CLick

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