led driver

I'm using an AL8843 LED driver and have assembled the circuit according to the datasheet. I used a 390mΩ Rset resistor to set the output current to 256mA. As per the datasheet, I left the CTRL pin floating to operate the driver at maximum power. However, after powering up the circuit (Input...

Hey all! I have some problems getting LP5036 led driver to work. Mainly, the most weird thing that is happening is that LEDs are turned on, even if IC is in reset. Meaning, as soon as I apply power, all LEDs turn on and I cannot control them via I2C interface. It looks like the OUT pins are...

I am wanting to use a Mean Well 65W DC to DC LED driver powered off of a 24v Mean Well power supply. The data sheet recommends this circuit and they provide enough information I think I could make my own common mode chokes but I thought it would be easier to buy them on Digikey. I see they...

I have a Phillips 24 inch monitor/tv given to me by a friend that I am trying to repair (model number 24PFL3603/F7). I did the flashlight test on the screen and I can see the picture (well, actually I saw the "no input" message as the tv was not connected to any inputs at the time), so that...

I am a complete beginner at designing circuits and my English sounds like a 5-year-old talking. So, please beer with me. I was thinking of building an aquarium light. As plants need a full spectrum of light to grow properly, this is the selection of colours I came up with by watching many...

Hello, guys! Recently, I've been facing issue on dimming LED drivers from Diodes Incorporated. As example, the LED drivers I'm in trouble with is: AL8843SP. On datasheet, the manufacturer says CTRL pin must be drive with: open drain output or push pull output stage. I build those circuits, but...

Hi all, I am trying to build some underwater lights for my boat. I am using 10 pcs of 3W RGB 6 pin leds in series and i have tested the output. I am currently using a constant current constant voltage driver. I would like to make a pcb capeable of driving the 10 leds and controling them with...

AC DC rechargeable Led bulb driver mainly build with two different ICS. First one is drive several leds in series when power is available. Second one is drive several leds in parallel, also charge the lithium battery, when power cut happens the second IC drive the leds in parallel using the...

hello I have a practical task to make a simple LED lamp. I was using LDD-1000 for that purpose. But it does have minimal duty cycle of 20% (output is filtered so it's 20% of max. current) . Was looking for an alternative that could provide smooth control of current from 0A to 1A. Kinda lost in...

I want to make a circuit that will convert a PWM signal to an analog signal. I want the circuit to be able to work on higher frequencies as well though (up to 15 kHz). Would an RC filter be the best method? Any reference design examples for this?

What is a good driver for a 30W RGB LED? I got it ages ago then forgot about it but might want to use it in a project now. Here is a picture, also I would like the driver to be able to be controlled with an arduino. This is the link, but don't worry I also put a heatsink and fan on the back of...

Hi, everyone! I've made a LED buck-boost (BB) driver based on LM3429. It's for automotive lighting, so Vin = 9-14.5 V, LED string consist of 10 white leds. V_out is about 30V, I_out=1.3A. All components were calculated according to LM3429 datasheet for BB topology. All datasheet recommendations...

First time repairing a LED. A year after purchase, my barn light started flashing non stop every seconds. At first I thought it was the light sensor but changing it did not solve the issue. The next possible culprit would be the driver, but unfortunately there is nothing written on it to...

Hello forum! I am a beginner in electronics and for a lighting project I bought a dimmable trafo and a touch dimmer with the hope to be able to combine these. The trafo is a MeanWell LDB-600L, that is a 600mA constant current trafo with a "DIM" input that takes either a PWM signal (100-1kHz)...

Hi All, I wanted to have the LM317 as LED driver for the DRL (Daytime Running Lights) in my car. I want the DRL current to be 200mA and have chosen 6.2 ohms. Now I want the DRL current to be 50mA when I switch on the Fog lights, hence I have chosen 25 ohms (if this is non-standard then I will...

hello I am designing high power led lamp for vehicles using this led. led datasheet this led has If up to 6A and Vf is around 3 V, I am going to use it at 4A for longer life. My input voltage source is car battery so voltage range is 12V - 16 V I am hoping to connect two leds in series. since...

Dear Team, Please see the attached image which shows the circuit of driving LED using an opamp. We are fixing current through LED using opamp. I am clear about how they obtained the current equation.Isense=Vin/Rsense because opamp is in negative feedback My question is why they are not...

Bilgisayarı led ekran ile nasıl iletişim kurabilirim. Bilgisayarla led ekranı rs 485 protokolü ile nasıl iletişim kurabilirim. Led ekranda c ile yazılmış bir yazılım var. Java se kullanarak bilgisayar led ekran ile iletişim kurmak istiyorum. led ekran görüntüsü Java dilini kullanarak Android ve...

Hi all, I'm working on a micro controller project to do race timing for rowing regattas. It's coming along pretty nicely and I want to add one component: A finish light that will be turned on and off by the microcontroller. The light needs to be seen from a distance in sunny conditions. I want...

HI all, I want to understand the proper way to make a dimming function for the XL6005. I found some schemes that suggest using the EN Pin: And some that use the FB Pin: So which one should do the work and what PWM signal should I use?