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LED DRIVER DESIGN DEVELOPMENT TESTING


regulates the power to an LED or a string (or strings) of LEDs. An LED driver responds to the changing needs of the LED, or LED circuit, An LED driver is an electrical device that regulates power to an LED or a string of LEDs. Using one is very important in preventing damage to your LEDs as the forward voltage (Vf) of a high-power LED changes with temperature Energy-efficient LED drivers for general lighting, display backlighting, automotive, signage and traffic signals. Topologies include buck regulator LED drivers, boost regulator LED drivers, offline LED drivers,

LED driver considerations
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Many of today portable electronics require backlight LED driver solutions with the following features: direct control of current, high efficiency, PWM dimming, overvoltage protection, load disconnect, small size, and ease of use. This article discusses each of these features and

Analytical study of harmonics issued from LED lamp driver
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Index TermsLED, Harmonic, LEDDriver LED lamp I. INTRODUCTIONEven though LED lamp has many advantages, it also has some disadvantages such as generation of harmonics or EMI in the system due to the functioning of switching devices of the LEDdriver

Matching Driver to LED
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Graphs of typical V F vs I F are shown in Figure 1, and it is important to note that current is the independent quantity, reflecting the fact that current control is the key part of an LEDdriver . Choices in Array Design Affects Performance This application note presents the design equations, schematics and source code for a 5.5 W power LED driver using the PIC16F785 MCU. The application, as shown, can be connected to operate as a buck-boost converter or a boost converter. The PIC16F785 makes

A single-stage LED driver for the street lighting system
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Abstract. A single-stage LED driver for the street lighting is proposed. The system consists of a constant current circuit and a constant voltage circuit, and the constant voltage circuit is gotten by integrating a buck-boost circuit and a flyback circuit. The peak current control

High Power IR LED Driver Using the PIC16C781/782
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Early infrared (IR) remote control systems employed a simple on-off modulation of an IR LED to transmit the control data between the remote control and the appliance. Unfortunately, while this method was simple to implement, it suffered from both interference and range

A Digital Constant Current Power LED Driver
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This document describes a power LED driver solution using the PIC12HV615 microcontroller (MCU). The PIC12HV615 is an 8-pin MCU with many integrated analog features. The LED driver circuit is a buck (stepdown) solution and the circuit presented here

Buck Configuration High-Power LED Driver
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The circuit and firmware described in this application note demonstrates a minimal parts count driver/controller for a LumiledsLED. The circuit is based on a buck topology switching power supply using the on-chip comparator peripheral within the PIC12F675 PIC

PowerPSoCMPPT Solar Charger with Integrated LED Driver
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Solar panels consist of photovoltaic cells that use light energy from the sun to generate electricity through photovoltaic effect. Maximum Power Point Tracking, referred to as MPPT, is an electronic system that operates the photovoltaic modules in solar panels to produce

What Type of LED Driver or Power Supply Do I Need
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Conventional AC-DC power supplies and DC-DC converters provide an output that is regulated to provide aconstant-voltage.However, LEDs work most efficiently and safest with a constant-currentdrive. As a result, many new devices have been developed to provide this

Compensating and measuring the control loop of a high-power LED driver
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A mathematical model is always helpful in determining the optimal compensation components for a particular design. However, compensating the loop of a WLED currentregulating boost converter is a bit different than compensating the same converter

Development of a 20V- LED Driver based on the Boost Converter using a FPGA Module
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AbstractWe present the development of a LED (Light Emitting Diode) driver based on the boost power converter. Several DC to DC converter circuits were modeled using B2SPICE to evaluate their characteristics by varying the components and the duty cycle. The drivers

Low Cost, High Power Factor, Dimmable, Monolithic AC-Direct LED Driver with on-Chip Step-Dimmer for Outdoor Lighting Applications
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AbstractIn this paper, we develop a monolithic AC LED driver IC which can drive and dim high voltage LED strings directly from the 220V/60Hz commercial AC power. The proposed AC LED driver delivers a best-in-class dimming performance via a simple concept with a

STEVAL-ILL044V1: 9 W Triac dimmable, high power factor, isolated LED driver based on the HVLED815PF (for US market)
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The STEVAL-ILL044V1 demonstration board showcases STnew LED driver chip, the HVLED815PF. It solves the problem of low-cost drive circuitry for LED replacements for 40 to 60 Watt incandescent or equivalent compact-fluorescent lamps. The HVLED815PF is a new Abstract An integrated full CMOS driver has tieen realized with a modulation current of 60 mA at a maximum bit rate of 150 Mbit/s. A CMOS receiver has been developed which can amplify PIN modulation currents less than 10 pA at the same bit rate of 150 Mbit/s. Both

An electrolytic-free offline LED driver with a ceramic-capacitor-based compact stacked switched capacitor (SSC) energy buffer using virtual inductor active ripple
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Abstract This demonstration shows a ceramic capacitor based stacked switched capacitor (SSC) energy buffer that replaces the limited life electrolytic capacitors used for twice line frequency in an offline LED driver . Two LED drivers are displayed: one with electrolytic

Convert a Buck Regulator into a Smart LED Driver Including Dimming
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With their long lives and low energy consumption, LEDs promise to change the lighting industry, but a key limiter to rapid adoption is the cost of the LEDs themselves. The cost of LED luminaires (complete electric light units) varies, but the cost of the LED, typically around

A PWM Phase-Shift Circuit using an RC Delay for Multiple LED Driver ICs
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AbstractThis paper proposes a PWM phase-shift circuit to make that the LED lighting system distributes the channel currents evenly for any number of LED strings by generating evenly phaseshifted PWM signals for multiple LED driver ICs. The evenly distributed

Research and Development of LED Driver with Power Line Communication for Intelligent Lighting
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Abstract. This paper analyzes the most significant details of development of a modern luminary. One of the effective ways to improve the energy efficiency of lighting systems and luminaries is to use the so called smart luminaries. This means that the luminaries turn on

Design of a Two-Stage Driver for LED MR16 Retrofit Lamps Compatible with Electronic Transformers
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We present a two-stage MR16 LED driver consisting of a boost converter in the first stage and a buck converter in the second stageIndex Terms LEDdriver MR16, retrofit, triac dimmer, electronic transformer I. INTRODUCTION

Single-Stage Flyback LED Driver Meets Class C Limits on Harmonic Currents
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The technology and performance of high-brightness light-emitting diodes (HB LEDs) have undergone significant improvements driven by new applications in liquid-crystal-display (LCD) backlighting, automotive lighting, traffic lights, and general-purpose lighting- . As

A Novel Single-switch High Power Factor LED Driver Topology With High-frequency PWM Dimming Capability
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Abstract In this work, a novel off-line converter with power factor correction (PFC) and pulse- width modulated (PWM) dimming function employing a single active power switch is proposed for LED lighting. The proposed converter is a slightly modified flyback topology

Simulation of a Two Stage High Power Factor Driver for White Power Led
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high-efficiency dimmable LEDdriver for low-power lighting applications

Critical Current Control (C3) and Modelling of a Buck Based LED Driver with Power Factor Correction
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Abstract. Buck converter has a good aptitude for LED driver application. Here a new technique introduced to control and model a buck converter in the closed loop condition using Lagrange equation. To improve the final model accuracy, parasitic elements of the

A Highly Efficient SEPIC-Flyback Integrated Converter as an LED Driver
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ABSTRACT: Light-emitting diodes (LEDs) have been widely used for various lighting applications. A high power factor single-stage single-switch driver can be used to supply LEDs without using an electrolytic capacitor. By integrating the single-ended primary

Reliability of LED driver circuit and its analysis
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Abstract: Recently LED is best option for domestic as well as commercial lighting applications. But in LED lighting driver circuit is very weak link. Reliability study of LED driver is one of the most challenging and time consuming process. This paper proposes

Closed loop DC-DC converter for LED driver circuit
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ABSTRACT This report develops Closed-loop DC-DC converter for LED driver circuit. The aim of this project is to understand the performance of LED driver circuit by using closed loop Buck Converter. The methodology of this project consists of two steps which is circuit

IMPLEMENTATION OF FINFET BASED LINEAR CURRENT MODULATION LED DRIVER IC
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ABSTRACT The Light-Emitting Diode ( LED ) driver is an important part of Visible Light Communication (VLC) systems. The main challenge of the VLC LED driver is to offer a high data transmission rate with high power efficiency. This paper presents the design of a white

LED Driver for Visible Light Communication Using LI-FI
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Abstract-, Visible Light Communication (VLC) system based on white LEDs has emerged an eco-friendly IT green technology using THz Visible light communication in provision of both lighting and wireless access. Installation of new communication cables between oth-Er fixed

Programmable 300 mA Camera Flash LED Driver
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The CAT3612 is a highefficiency 1x/1.5 x fractional charge pump with programmable current in two LED channels. Each channel delivers accurate regulated current up to 150 mA and make CAT3612 ideal for driving one or two flash LEDs. Low noise operation is

ADAPTIVE FEEDBACK CONTROL BASED LED DRIVER FOR LOW-POWER LIGHTING APPLICATIONS
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It is proposed to develop a dimmableLED driver circuit with adaptive feedback control for regulating the LED current and brightness. By using universal input voltage operation, high efficiency and high power factor can be achieved by a coupled inductor single ended

ECE 1270 Pseudo-Lab Report: Design of an LED Driver
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Abstract-This report presents measurements of a diode and models based on linear regression and downhill simplex search to find parameters of a Shockley equation. With respect to the data, the linear regression model has a 10 percent error and the downhill

Analysis and Experiment of Peak Current Controlled Buck LED Driver
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Abstract Realistic amounts of time delay are found to have significant effects on the average output LED current and on the critical inductor value at the boundary between the two conduction modes. Especially, the time delay can provide an accurate LED current for the

A Study on Circuit Design of LED Driver for LED Light and Communication
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Abstract. Replacing legacy lights with LED lights is one of the most effective methods to save energy. We designed the LED driver based on methods that control the constant current for LED Lights and analyze the network system. The proposed LED driver is applied to a

LED DRIVER BOOST CONVERTER
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VCC-0.3 V to+ 10V DRIVE-0.3 V to VCC+ 0.3 V EOR-0.3 V to VCC+ 0.3 V STDN-0.3 V to The lower of (+ 5.0 V) or (VCC+ 0.3 V) SENSE-0.3 V to The lower of (+ 5.0 V) or (VCC+ 0.3 V) Operating Temp.-40 C to+ 85 C Storage Temp.-55 C to+ 125 C Power Dissipation

A model-based approach for a dimming high efficiency control/power LED driver
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AbstractA light emitting diode (LED) controller consisting of a step-down switching converter with current regulation and programmable current ripple is proposed. The dimming features are obtained by regulating the average current by means of a pulse width

An Interleaved Single Stage LED Driver with Coupled Inductors and LC Resonant Converter
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AbstractThis paper proposes an interleaved single-stage LED driver with coupled inductors and LC resonant converter. The papers presents LED driver with coupled inductors and series-resonant converter into a single stage power conversion circuit. In this

LED Driver Powers Halogen Replacement
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High brightness LEDs are an inexpensive, robust, and green replacement to halogen light bulbs. The tungsten filament base to the halogen bulb has a short lifetime compared to the robust LED. The safety hazards of the inert gas, the expense of the UV filter encasement,

Study on Thermal Analysis for Optimization LED Driver ICs
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This research was analyzed thermal characteristics that was appointed disadvantage when smart LED driver ICs was packaged and we applied extracted thermal characteristics for optimal layout design. We confirmed reliability of smart LED driver ICs package without

A Current-Mode Digital Controlled Buck-Boost DC-DC Converter for LED Driver
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Abstract-This paper presents a digital LED Driver that provides a high quality of the back light for display modules. The proposed LED driver is implemented in 0.18 um CMOS process. Proposed LED driver consists of three types of circuits, a buckboost converter,

A Novel Integrated Circuit Driver for LED Lighting
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Besides the typical parts of LEDdriver an integral part was added at the output terminal of error amplifier in the driverIn this way, the LEDdriver displays high performance, in which output current with less 1% error and total effi- ciency as high as 96

High Efficiency ThinSOT White LED Driver Features Internal Switch and Schottky Diode Design Note 325
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The LT3465 white LED driver is ideal for backlight circuits in small, battery-powered portable devicessuch as cellular phones, PDAs and digital cameras. The LT3465 includes important features such as automatic soft-start to prevent large inrush current, open LED

High Efficiency Multi-Channel LED Driver IC with Low Current-Balance Error Using Current-Mode Current Regulator
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Abstract This paper presents a multi-channel light-emitting diode ( LED ) driver IC with a currentmode current regulator. The proposed current regulator replaces resistors for current sensing with a sequentially controlled single current sensor and a single regulation loop for

High-Efficiency Single Stage Power Factor Correction and Step-Down Offline LED Driver
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The NCL30001 is a highly integrated controller combining PFC and isolated step down power conversion in a single stage, resulting in a lower cost and reduced part count solution. This controller is ideal for LED Lighting applications with power requirements

Modelling of 200W LED Driver Circuit Design with LLC Converter
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Abstract LED is a recent technology, which has replaced all other conventional light sources in the past few years and since it is current controlled, accurate driver design is necessary. The LED driver should have the capability of providing constant current regardless of the

One Kind of Wide Input Voltage Flyback LED Driver Power Supply
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Abstract: Flyback switch power supply is designed based on iW1706 and used to drive LED. iW1706 is a high performance AC/DC off-line power supply controller. It using the primary side sensing and quasi resonant operation, and provides the over voltage, over current

An AC LED Driver with Improved Total Harmonic Distortion and Power Factor
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AbstractIn this paper, A Bridgeless Boost converter proposed for improving power factor (PF) and total harmonic distortion (THD) of an AC LED driver . The proposed topology is integration of Boost and Buck-Boost converter. In conventional LED driver there were a bridge rectifier with

PFC LED Driver
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ABSTRACT In the conventional single-stage PFC LED driver with slow feedback response, LED current is easily unstable with visible flicker by randomly distorted line voltage. The proposed single-stage LED driver implements robust LED current regulation against the

Automotive LIN RGB LED Driver
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The NCV7430 is a singlechip RGB driver intended for dedicated multicolor LED applications. The RGB LED driver contains a LIN interface (slave) for parametric programming of LED color and intensity. The device receives instructions through the LIN

Design of Flicker-Free Electrolytic Capacitor-Less Ac-Dc Led Driver
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Abstract: The life of LED driver is mainly dependent on the component used in it. Elimination

16 CHANNEL LED DRIVER WITH DOT CORRECTION AND GRAYSCALE PWM CONTROL
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40 C to 85 C 28-pin HTSSOP PowerPAD TLC5941PWP 40 C to 85 C 32-pin 5 mm x 5 mm QFN TLC5941RHB 40 C to 85 C 28-pin PDIP TLC5941NT (1) For the most current package and ordering information, see the Package Option Addendum at the end of this

Design and Experiment of Slope-compensated Buck LED Driver
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SlopeLEDDesign and Experiment of Slope-compensated Buck LED Driver Marn-Go Kim, Young-Seok Jung, and Nam-Ho Kim Pukyong National University A discrete time domain analysis for the slope- compensated buck LED driver is performed

2-bit I2C-bus LED driver with programmable blink rates
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ƠNo glitch on power-upƠSupports hot insertionƠLow standby currentƠOperating power supply voltage range of 2.3 V to 5.5 VƠ0 Hz to 400 kHz clock frequencyƠESD protection exceeds 2000 V HBM per JESD22-A114, 150 V MM per JESD22-A115 and 1000 V CDM

Digital Simulation of Modified Solar Based LED Driver for Street Light Application
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AbstractIn this paper, a novel design of integrated double buck boost converter with PI filter is proposed for power LED Street light. This circuit consists of only one switch three inductors and three capacitors and this can provide very high power factor with increased

Single Stage Single Switch LED Driver with Improved Power Factor Correction and Soft Switching
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ABSTRACT: Light Emitting Diodes (LEDs) with their current performances have been proved to be the most suitable solution for street lighting applications. Nowadays, a topic of interest in this context is the design for electronic driver in order to take the advantage of LEDs

Dimmable LED Driver Using Double PWM
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AbstractSMPS converter is an electronic device which can be used to increase or decrease the DC electrical power from one level to another. A dimmable driver circuit for Light Emitting Diode lamp with dimming feature is used in this paper. The flyback converter

4-Channel 1-Wire LED Driver in 3 x 3 mm Package
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The CAT3614 is a high efficiency 1x/1.5 x fractional charge pump with programmable dimming current in four LED channels. To ensure uniform brightness in LCD backlight applications, each LED channel delivers an accurate regulated current. Low noise and input

Design, Modelling and Simulation of Multistage High Brightness LED Driver for Street Lighting Application
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AbstractThis paper presents the multistage high brightness (HB) LED driver for the application of street lighting. This paper focus on the reliability because the LEDmay last for greater than 50,000 hours but the drivers may not; hence the driver design has to be such

Investigation and Performance Analysis of DC-DC Converter For High Efficiency Led Driver
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Abstract The need to conserve energy has led to development of low power consuming devices. Out of many one such device is LED used for lightning purposes. The LED requires a specific amount of voltage and current depending upon the type, rating and amount of

A Single-Stage Single-Switch Multiple Output LED Driver Circuit
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A resonant single-stage single-switch eight-output LED driver has increased power factor. The output current of eight LEDs are controlled by controlling one output current which is said to be the passive current balancing technique. When it operates in the critical

ELECTRONICS COMPONENTS SALES AND SERVICE-INTEGRATED CIRCUIT-ANALOG, DIGITAL, DSP, RF IC, WIRLESS IC, VLSI, CAPACITOR, RESISTOR, INDUCTOR, PCB, MODULE, SENSOR