All Questions
10
questions
3
votes
2
answers
80
views
Current peak on a low EMI buck LED driver
I'm designing a buck LED driver using the LT8376 and I'm following the typical application for a low EMI solution (page 26).
On the output, the schematic proposes a 100 nF capacitor in parallel with ...
- 83
1
vote
1
answer
494
views
Sanity checking an LM2596-ADJ constant current supply design for driving LEDs
I've designed, in simulation, an adjustable constant-current supply based on an LM2596-ADJ buck converter IC.
I chose STW8B12C LEDs for simulation because three of them in series roughly matches up ...
- 10.8k
1
vote
2
answers
234
views
What power supply do I need for this LED driver?
I'm putting together a project where I'll be driving 4 x 10W RGB LEDs (these ones) with one PicoBuck LED driver. I'll be using all three channels on the LEDs at the same time and controlling dimming ...
- 19
5
votes
2
answers
492
views
Open-loop Buck LED dimming
About this buck LED driver...
TL/DR the questions:
1) I intend to drive the FET from a microcontroller PWM via a suitable FET driver. This open loop control scheme seems too simple. Is it a trap? I ...
- 79.5k
3
votes
3
answers
425
views
Setting current on Diodes Inc PAM2863 LED driver IC, with external resistor AND driving different voltage to VSET
I'm looking to use the Diodes Inc PAM2863 DC-DC LED driver in a project.
The datasheet gives a V=IR method for setting the average output current with an external resistor, where Iout = 0.1 / Rs.
...
- 31
6
votes
3
answers
937
views
Reduce output current ripple on hysteretic buck converters
I am learning to use a new type of regulator: a buck with hysteretic control, therefore with no fixed frequency and no output capacitor.
As example, I was trying out the ILD4001 for an LED driver. ...
- 1,305
1
vote
3
answers
178
views
Is there anything wrong with my current setup for LED
I'm planning on building my own 5W high power LED Lamp, and this is my current setup:
Circuit
My power source is going to be 3 Li Ion Batteries in series, giving 14.8 volts for most of the time.
I ...
- 43
1
vote
1
answer
244
views
Buck Boost Driver to switch 2 LED chains
simulate this circuit – Schematic created using CircuitLab
I'm working on a project to turn 2 LED strings (each containing 6 HB LEDs).
Here is my question.
The Buck Boost driver I'm using is ...
- 161
1
vote
0
answers
631
views
Failed attempt to make LM3404 drive a 10W white led
I'm attempting to drive a 10W white led (ebay type, 8-11V, 1A) with a LM3404. I've approximated their reference circuit:
I've used a 33uH (1.6A) inductor as L1 and a schottky diode (SS24, 2A 40V) as ...
0
votes
1
answer
344
views
LED array at high current or high voltage?
Is it more efficient to drive LEDs at a high current and low voltage, than a lower current and high voltage?
I'm in a situation where I have to design an LED driver for a custom CoB emitter, so can ...
- 1,315