The LM/04HV are monolithic switching regulators de- VIN Range 6V to 42V (LM) .. the front page of this datasheet, the inductor and LED can. Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. 2All trademarks are the property of. The LM/04HV is a buck regulator derived controlled cur- .. Reproduction of TI information in TI data books or data sheets is permissible.

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You must log in or register to reply here. Welcome to our site! Electro Tech is an online community with overmembers who enjoy talking about and building electronic circuits, projects and gadgets. By continuing to use this site, you are consenting to our use of cookies. Which brings up another question: So in an effort to cool it off while still running I blew onto the board Ok now for the problem Operating frequnecy is about kHz, set be a k resistor Forums New posts Search forums.

LM3404 Buck LED driver IC overview

Or should I try to match my source more carefully to my load? From the LM datasheet this seems to be a suitable diode for use in this situation So conduction dissipation alone becomes 0.


Up to about 25mA Thanks for all your time, and help And to my surprise it works the first time I turn the power on.

This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register. For a better experience, please enable JavaScript in your browser before proceeding. Would a higher rated diode with a larger package be of any use to help dissipate heat more effectivly, and hope to keep it operating normally Which is why I have the input voltage at 12VDC Articles Top Articles Search resources.

LM from Texas Instruments

To participate you need to register. Thanks again for all your help The inductor is a 22uH 1A inductor The inductors datasheet is here Datashset Questions Started by norbss Yesterday at Thread starter cjurczak Start date Dec 27, I know its not much, and the board is kind of messy, but it gets the job done Started by fastline Yesterday at 8: Click here to register now.

If, for instance, the LED is at 3. If, on the other hand, you are running from 25V you said you are using 30V datashert you have 3.

No where near the designed mA Media New media New comments Search media. I unplugged the power everything cooled down promptly I was hoping this design would be an energy efficient solution I threw together a small PCB to test and make sure I have everything working. Supply voltage for the system is a 12VDC switching psu Sorry for the delayed response, I’m been on the lm4304 and I didn’t have anymore specifics This board is being use km3404 as a proof of concept, since I have never used this chip before I seems dropping all this energy on the diode would be inefficient Just saying hello Started by MichaelaJoy Yesterday at 6: I’d appreciate any comments or previous experience on this topic Eventually I’d like to incorporate it into a larger project, but not unless I can iron out this bugs Replacing a 4 pin leaded inductor with a 2 pin Started by gkmaia Yesterday at And upon applying power everything repeated After letting it run at for a few moments longer it settled at about 16mA and I noticed that they recirculating diode is hot to the touch Ubergeek63 Well-Known Member Dec 28,