led driver
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