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ATX modding revisited

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LAN_403

Part Scavenger

Sun Aug 20 2006, 03:53AM

Registered Member #79 Joined: Thu Feb 09 2006, 11:35AM
Location: Arkansas
Posts: 673

I was wanting to mox an old PSU so that it puts out 15V. This is the datasheet for the SMPS controller

, but I don't know what I should be doing instead. It's not the usual '494 equivalent. Where should I send the new volt reference? I tried sending it to Vfb, but it doesn't change anything at all.

uzzors2k

Sun Aug 20 2006, 08:53AM

Registered Member #95 Joined: Thu Feb 09 2006, 04:57PM
Location: Norway
Posts: 1308

Have you been able to induce any voltage changes yet? If not try fidling with the resistors around vfb, comp and current sense until you get something. Sorry I can't be of more help, but I've only done mods on TL494s.

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