Questions tagged [led-driver]

An LED driver is a self-contained power supply that controls the amount of current and voltage supplied to an LED light. An LED constant current driver monitors the loop current of each LED and automatically adjusts the generated DC voltage output to the minimum value needed to produce the highest forward voltage. As mains power is AC and Light Emitting Diodes run on DC, this current needs to be converted by a rectifier

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24 views

Can someone help me design an expandeable led strip system

I want to make an open source expandable system to control WS2812B 5m 60 ip30 (or higher pixel density) led strips. Im going to be using about 40 meters which is about 2400 leds in total but all the ...
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52 views

Need help incorporating a PWM into a circuit

everyone I hope you're staying safe. To preface I am a noob at electronics, and I've learned a lot these past weeks. I need help designing with designing a circuit. To explain my project: I have a ...
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20 views

Unexpected behavior setting non-default I2C address for HT16K33 LED Driver

The HT16K33 is an I2C controlled LED driver. The data sheet shows a standard way of setting the I2C slave address: I have implemented this circuit, but it does not work as expected. For the default ...
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TPS92830-Q1: Unexpected LED Driver Gate Voltage [closed]

Schematic Link: https://a360.co/2XsIdVQ

 We are a small automotive electronics company trying to take advantage of the TPS92830-Q1 3-Channel High-Current Linear LED Controller. Our design drives ...
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43 views

Help with a constant voltage led driver

Maybe the title could be better chosen. Hello, I have a 33V 0.8A constant voltage led driver (see picture below, the item no. is GL-1201C-8 if that can help) which no longer works. I searched online ...
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38 views

What are the maximum number of RGB LEDs that can be hooked up to just one of these I2C RGB LED Drivers?

So this is LP5036 by TI (Datasheet), a 36 channel RGB LED driver I2C interface-able with a micro controller, which means it can drive upto 12 RGB LEDs individually up to my understanding. But using ...
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63 views

Series and parallel LED using

I am planning to build 4 LED-strips using two different 'white' settings (1+1 strip x 4). The LEDs will be driven by a 24V constant voltage dimmable RGB-DALI driver (up to 5A per channel). My idea is ...
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16 views

COB LEDs array in parallel driving circuit

I need to connect half a dozen COB LEDs (36V, 300mA). I can only connect them in parallel, not in series, because of wiring considerations. For them to all be at the same brightness, my understanding ...
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35 views

LED panel wiring

I have matched an led driver (constant current power supply) to a circuit of leds such that no resistors are needed to limit the current by taking advantage of the leds "near" linear voltage ...
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71 views

Trying to design a switchable LED circuit with no experience or skill - please send help - PART 2: I set a transistor on fire, please send more help [closed]

following on from my previous question: Trying to design a switchable LED circuit with no experience or skill - please send help I have an update - a mix of good and bad news... Good news is the LEDs ...
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141 views

ISELED Driver Communication protocol

This is my ISELED Driver Datasheet INLC10AQ & my Microcontroller datasheet S32K142 - 64 pin Microcontroller I have a NXP Microcontroller connected to the above LED Driver. I need to figure of the ...
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36 views

Fusing an In-Wall LED Application

I'm building my own PCB to power 8 in-wall LED's for a stairwell. I'd like to protect the LED's with fuses, but I'm unclear on how the voltage on fuses work. My specs are as follows: LEDs: 5V, ...
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77 views

Creating stable 72V power source

For a lighting project, I want to power 12 programmable LEDS (WS2812b or equivalent) in series, and then have 5 of these sets in parallel. Due to extra resistance, I think I need a constant voltage ...
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103 views

How to drive the gate of a MOSFET with a PWM like signal

I'M trying to use MOSFET as a driver for my 10W LED with 12V supply. This LED will be used as a transmitter with signal coming from Arduino nano. I'm using IRFZ44N MOSFET with a Vgs(min)=2V and Vgs(...
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34 views

Want to understand the led series/parallel and parallel/Series combination circuit

I'm Working on LED load design circuit which is up-to 64V@1.2A. I thought of giving LED's in series and parallel combination with switches to control the voltage but while searching I found one ...
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33 views

Drive series of 1W led with mosfet

I've to switch on for a short time a series of 6 or 7 leds with a 24Vdc. Follow some details... power supply: 24VDC led: 1W CREE XRE Q5 link Power: 1W Voltage: 3-3.7V Current: 300-500mA this small ...
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29 views

Am I calculating my shunt FET power dissipation correctly?

simulate this circuit – Schematic created using CircuitLab I'm designing an LED driver circuit that requires very fast PWM switching at a high resolution (10bit at 30khz requiring a minimum ...
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36x LED 5730 in series: diodes burnt when LED driver (based on BP9833A or MT7854BD) powered up

Background: I have 18W, 36 LED lamp fixture which I cannot change. Originally it has 2x parallel 18off 5730 LEDs and 300mA driver. It works for some time, but diodes starts burning. I thought that ...
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LED driver - current monitoring AC or DC side with Arduino

I have 2 LED strips connected in parallel to the same LED driver (driver is constant current + constant voltage). I have got an Arduino controlling a relay module that switches the lights on or off (...
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35 views

TI TPS6116 Output Voltage

I am designing an LED backlight driver as a sub-circuit for a DPI interface. The backlight in question requires 12.8V. I am trying to use the TPS61161 and have read through all of the documentation ...
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25 views

The number of led lights on a transformer

I want to know how many led 20mA 3V lamps can I run on a 15 volt transformer. I want to have each one controlled separately - in other words I might have only one on or I might have all of the on or ...
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33 views

Powering and dimming white LED from single-cell 3.7 rechargeable lithium battery (with a 3.3V Arduino mini)

I'm designing a circuit for a handheld project that runs from a 1-cell rechargeable Lithium battery (18650 or prismatic). The circuit powers an Arduino Mini Pro running at 3.3VDC. The Arduino board ...
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24 views

LED driver circuit : MP2480

I am trying to drive an XHP70 (single LED) board - XHP70A-0S-01-0D0HM227G using a power supply. I need a functionality to dim the system. I was planning to use a driver board - Monolithic LED driver ...
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75 views

Can the voltage drop of an LED driven at a constant current be higher than the supply voltage?

So I've been working on a constant current LED driver project, and I've run into a weird situation. I'm driving 3 parallel rows of 8 LEDs in series (Luxeon 2835 color, green) using a Sparkfun picobuck ...
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57 views

Noise when using SPI LED driver on 2m cable?

I've made a 2 letter 7 segment display using this LED driver https://www.st.com/en/power-management/stp16cp05.html when I connect it with a 10-20 cm cable to my MCU board it all works OK, but fails ...
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74 views

Two types of LEDs, serial - parallel combination

I am trying to design small DIY grow light for Chilli Peppers. I found ideal to use a combination of Samsung LM301H(https://www.samsung.com/led/lighting/mid-power-leds/3030-leds/lm301h/) and LM351H V2 ...
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53 views

LM317 adjustable constant current source - Why is the voltage between Output and Adj pins is not always 1.25V?

I am trying to create an adjustable constant current circuit using LM317 to drive LEDs of different colors. More specifically, I want the brightness of the LEDs to be the same, therefore, the ...
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32 views

LED Driver Output - Current Adjustment Range

I bought this Led Driver(HLG-480H-48A) for my Strips that use around 43V 9A. I've never used a LED driver before and have got a few questions about them: The output current adjustment range (...
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57 views

How a blue LED works and how this affects how the LED driver is set up? [closed]

How a blue LED works and how this affects how the LED driver is set up? Is Someone here have a good explaination?
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Constant-current driving with LED Driver and Boost DC/DC converter

Novice here, sorry if I'm missing something obvious. I'm trying to drive 4 strips of 6 low-power RGB LEDs each (APF3236LSEEZGKQBKC) on a 3.3V battery. I have a 12-channel LED Driver (TLC6C5912) which ...
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58 views

How to build a complet circuit with the following led in left and the following circuit in the right? [closed]

How to build a complet circuit with the following led in left and the following circuit in the right? ¨
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37 views

Understanding the application of a switching regulator as a constant current LED driver

There is an application note from ON-semiconductors which provides a few diagrams to use a well known MC34063 switching regulator as LED driver. it's around the idea of setting the 1.25v feedback ...
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78 views

Efficiently driving 6 LEDs in parallel

I have a display that has six white LEDs in parallel (common anode) as backlight. The LEDs' forward voltage is 3.2V, the current per LED is 20mA, so 120mA in total. The available voltages in the ...
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48 views

Connect LED-driver (BJT) in circuit

I need some help in this circuit! How can I connect LED-driver (BJT) in this circuit? Then what is the valus of RB and RC that meet the requirements, so that the LED driver works properly. ...
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53 views

Make my battery level indicator dimmable

I wired up this battery level indicator using a 9V battery (power supply is for ease of changing voltage.) It works well with only D1 lit at 6 volts up to all five LEDs at 9 volts. My problem is ...
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Help needed for driving 160 nos - 1.5W RGB SMD LEDs (5074 footprint)

I'm a planted aquarium hobbyist and have been making DIY led lights with 3W LED chips (white and other colour leds in 4 separate channels) driven with meanwell LDD dimmed with arduino. However ...
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39 views

Driving and dimming TFT LCD backlight

I have to add driving/dimming circuit to the design based on NHD-1.8-128160EF-SSXN-F display. The schematics suggested by the manufacturer is practically taken from MIC2289 datasheet (Figure 4-4). ...
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Source voltage driving a series LED strip seems below combined forward voltage

I am currently working on a project to build a digital clock. The digits of the clock are to be made from custom-built seven-segment displays. Each segment of a digit will be made up of a couple of ...
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60 views

BJT Constant Current LED Driver - Inverted behavior?

I'm trying to use build a constant current Led driver, using two BJTs (BC338 and BC547). The idea is to be controlled by Arduino's PWM, for dimming. I'm using the circuit bellow. The led is a white ...
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79 views

High voltage (220V) constant current LED driver using transistors

This electronic circuit is a constant current LED driver using two transistors. It is designed to work with low DC voltage like 5V or 12V. But I'm wondering if it is possible to connect it to 220V ...
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36 views

TLC59116 will not drive LEDs

Having the hardest time with this TLC59116 LED Driver IC from Texas Instruments. I have done a crazy amount of debugging and still cannot get it to drive a single LED. I have followed all the ...
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90 views

Help with powering LED strips from a LED TV

I have two LED stips salvaged from a LED TV. I only have these to LED strips and the ribbon cable that was connected to them from the TVs screen and not other PCB boards or components to help power ...
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78 views

MeanWell PWM dimmer

I'm trying to pilot in PWM 0-10v with a RPI the dimmer input of a MeanWell's HLG-80H-48B LED PSU. It doesn't work at all !! any hint of what could be wrong ? You can find on the following link, the ...
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29 views

How do I control the latch signal for the TLC5958 LED driver?

I would like to drive 512 RGB LEDs with individually controllable brightness. My plan is to 8-way multiplex them so I would like to use an LED driver that is designed for multiplexing LED displays. I ...
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77 views

Help refining a current control loop circuit

As a follow up to this question. (Sorry if this linking other posts is wrong. I'm new to forums) Will this design for an XHP70.2 LED Driver with arduino control work to the params specified? TL;DR: ...
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Will this design for an XHP70.2 LED Driver with arduino control work to the params specified?

I am making a driver PCB to drive an XHP70.2 LED at 15A (~7v) Continuous, Controlled from an Arduino. I am new to OpAmp's so I would like to know: Does this circuit look as though it would function ...
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AL8860 Led Driver: inductor placement

I have two questions concerning the placement of the inductor in an led driver circuit using the AL8860 by Diodes Inc.. I'm refering to the typical application circuit below: In their layout ...
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68 views

Replacing an LED power supply - but originally there were 2 supplies connected parallel

I have a LED lamp. It went wrong and I found out that it's power supply is the cause. Originally two of these supplies were connected parallel (their output connected parallel): Input: AC90-265V 50/...
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61 views

LED Lights Power Issue

I'm a first time user of both LED lights and this website so i hope i can get some help. i've bought some RGB LED lights and connected 5 reels ( 5x5M ) all to the one power supply, which inevitably ...
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46 views

Power dissipation of TLC6C5712-Q1 LED Driver IC

I am using this TI LED Driver IC to drive 9 LEDs I want to calculate the Power Dissipation of the Resistor (20k 1% 0402) which I have connected to the IREF pin. To calculate the power dissipation of ...

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