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Thread starter dr pepper Start date Aug 24, To participate you need to register. Any ideas on where it is or what I should be looking for?
Here is an image of the power supply Here is the datasheet of the TL It was probably caught by reddit’s spam filters.
Welcome to our site! I want to convert an atx power supply so that it has a single output, about 6v to 18v and be controlled from a datashheet voltage power aupply for a ventilation fan. Become a Redditor and subscribe to one of thousands of communities. ECE subscribe unsubscribe 60, readers users here now Discuss anything related to the field of Electrical and Computer Engineering.
DL Datasheet, PDF – Alldatasheet
Not sure whether the regulation is on the 5v line or the 12v line, I dont think they are seperate on this unit, maybe the 5v rail has a switching reg from the 12v rail.
The PSU is shutting down on me with overcurrent spikes in my application. The LM is an opamp, as you say. Click here to register now. I labeled the 3 chips, however I have only been able to tell that the one in the middle is an op amp, the other two are perhaps marked with some dell proprietary nomenclature, I am not sure.
This chip is almost universally used in SMPS because a everybody else’s supply uses it; b it works so damn well; c it’s part of the example circuit on all SMPS power supply controller datasheets; d it’s so damn cheap. I was trying to find the PWM Chip on any of them so I could attempt to disable it like this guy has done: Without knowing for sure i can’t find any hints when googlingit would be my initial guess that the DL is a power-factor correction IC, while the DS is the PWM system.
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Buck switchers should work, either a boost converter or a step down in this situation. Depending on topology, it may be different.
Those white rectangles, southeast of the “1D4” chip, might be opto isolators. Send the moderators a message and we can unblock it as soon as possible. Discuss anything related to the field of Electrical and Computer Engineering. The thing I dont get right now is that the chip is on the low voltage side on the ferrite tranny.
Different products have different specs – if you’re an engineer, keep discussions purely based on merit. Power, electronics, electromagnetics, semiconductors, software engineering, embedded systems – it’s all fair game!
Potentiometer Questions Started by norbss Yesterday at You might be able to hook up a scope to some of the pins on those chips and see which one changes when you load it up to the point where overcurrent kicks in.
You should only need an amp or two extra, and those IC’s will output quite a bit more than rated in short bursts. Then get out yer ohmmeter, datqsheet it on gabeepen tooter, and start buzzing.
Started by fastline Yesterday at 8: 101dl thinking maybe this chip is the part of the circuit that converts 12v from the main output down to 5v.
There is some feedback across the isolation through the 3 white optocouplers, so it may be that i am wrong, but i can’t tell you for sure. But what I need to know is where the PWM control chip is so I can try to disable the overcurrent protection on it. If you do a google image search on DNA and DNA you will find some schematics, any you may be able to piece together some info on those.
I’m thinking that theres a feedback resistor divider and a reference voltage that I can tap into to adjust the output.