NUD4001 & NUD4011 LED Drivers - Electronic Circuits Projects Diagrams Free

Monkey19939 · 5th June 2006, 05:14 AM

NUD4001 & NUD4011 LED Drivers from ON Semiconductors seem too easy to use when all others are using Buck-Topology ICs with Inductors, Capacitors, Resistors & MOSFETs.

http://www.onsemi.com/PowerSolutions....do?id=NUD4011

Need advices on these 2 ICs, Pro & Cons. Thank you very much.

justDIY · 5th June 2006, 01:33 PM

the 4011 looks like an adjustable shunt regulator to me, such a low current is the dead giveaway ... keep in mind, the "other" led drivers with inductors and what-not are primarly designed for high-brightness leds, requiring 100's if not 1000's of mA to operate. Trying to regulate a 3 amp luxeon III array using a linear regulator is an exercise in pain

the 4001 is just a lower voltage version, and the trade off is, it can handle more current ... paralleling devices is interesting. I bet the part still gets warm under a heavy load!

Monkey19939 · 5th June 2006, 05:13 PM

Thank you JustDIY

My load is a cluster of White LED x 24, Vf=3V, If=20mA with AC120V as Vin. Need to figure out a simplier way of driving these LEDs, never used NUD4xxxx before and try to avoid high component counts, ie. Buck-Topology if I can.

justDIY · 5th June 2006, 07:11 PM

yea, a high voltage shunt regulator is the perfect fit for this application.

just make sure you give those little so8 chips a big copper pour as a heatsink.

Monkey19939 · 5th June 2006, 08:14 PM

Will put in 2-in square 2 oz copper as heatsink.
Thank you JustDIY

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5th June 2006, 05:14 AM	(permalink)
Monkey19939	NUD4001 & NUD4011 LED Drivers NUD4001 & NUD4011 LED Drivers from ON Semiconductors seem too easy to use when all others are using Buck-Topology ICs with Inductors, Capacitors, Resistors & MOSFETs. http://www.onsemi.com/PowerSolutions....do?id=NUD4011 Need advices on these 2 ICs, Pro & Cons. Thank you very much.

5th June 2006, 01:33 PM	(permalink)
justDIY	the 4011 looks like an adjustable shunt regulator to me, such a low current is the dead giveaway ... keep in mind, the "other" led drivers with inductors and what-not are primarly designed for high-brightness leds, requiring 100's if not 1000's of mA to operate. Trying to regulate a 3 amp luxeon III array using a linear regulator is an exercise in pain the 4001 is just a lower voltage version, and the trade off is, it can handle more current ... paralleling devices is interesting. I bet the part still gets warm under a heavy load! __________________ If you don't have a planet, what good are gold bars? want to contact me directly? gmail gordonthree check out my project website: http://projects.dimension-x.net Favorite numbers: 09 F9 11 02 9D 74 E3 5B D8 41 56 C5 63 56 88 C0 Last edited by justDIY; 5th June 2006 at 07:10 PM.

5th June 2006, 05:13 PM	(permalink)
Monkey19939	Thank you JustDIY My load is a cluster of White LED x 24, Vf=3V, If=20mA with AC120V as Vin. Need to figure out a simplier way of driving these LEDs, never used NUD4xxxx before and try to avoid high component counts, ie. Buck-Topology if I can.

5th June 2006, 07:11 PM	(permalink)
justDIY	yea, a high voltage shunt regulator is the perfect fit for this application. just make sure you give those little so8 chips a big copper pour as a heatsink. __________________ If you don't have a planet, what good are gold bars? want to contact me directly? gmail gordonthree check out my project website: http://projects.dimension-x.net Favorite numbers: 09 F9 11 02 9D 74 E3 5B D8 41 56 C5 63 56 88 C0

5th June 2006, 08:14 PM	(permalink)
Monkey19939	Will put in 2-in square 2 oz copper as heatsink. Thank you JustDIY