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constant current led driver with programmable pwm control

Results 1 - 15 of about 100 for constant current led driver with programmable pwm control

PWM Operating Principles

By: Aabbye | 2011-07-29 | Internet Business
This factor determines the harmonic spectrum for a certain degree of control and for a given modulation pattern. A sufficiently large value of this ratio will reduce all the low-order read more

Inusoidal Carrier-Based PWM

By: Aabbye | 2011-07-29 | Internet Business
In this case the reversal instants, instead of being fixed, are determined by the intersections of a sinusoidal reference voltage of fundamental frequency and an amplitude (or modulation index) M, with a sawtooth modulating waveform of a (carrier) frequency pf (where p is the frequency ratio) [10]. The dominant harmonic of this alternative is that of order p. read more

Constant Current / Constant Voltage - Low Voltage Leds And Their Driving Circuits

By: Anita Samuelis | 2010-11-20 | Home improvement
Since there are several types of LED lights available on the market, making a decision on which one is the best for you is getting more difficult. The below article focuses on the difference between constant current and constant voltage LED lights for household applications. read more

Design Principles and Case LED Driver

By: zerryxu | 2010-12-30 | Electronics
This paper introduces the special lighting applications, and then elaborated on the use of DC / DC switch to constant current constant voltage regulator designed to achieve the basic principles and practical examples, and explains the high power LED driver design and cooling part of the design should be noted issues, concluded that new applications of high power LED driver design the new requirements, National Semiconductor is given a complete solution guide. read more

On The Led Driver Design

By: gaga | 2011-01-03 | Business
LED backlighting in portable products, the position has not wavered, even in large-size LCD backlight which, LED also began to challenge the CCFL (cold cathode fluorescent lamp) and mainstream; in lighting, LED lighting as most semiconductor key components, but also because withstand energy saving, environmental protection, long life, maintenance free, and many other ring and welcomed by the market. Drive circuit is the LED (light emitting diodes) products read more

Design Principles And Case Led Driver

By: zerry | 2011-01-24 | Computer
This article describes the application of special lighting, and then in the DC / DC switching regulator design using constant current and voltage to achieve the basic principles and practical examples described and explained the high power LED driver design and thermal design ... read more

Automotive Applications, High-brightness Led Driver Circuit-led Driver - The Electronics Industry

By: gaga | 2011-01-27 | Business
Issues: Car LED Lighting drive circuit LED Driver Switching Power Supply using the reservation measures Solution: Reduce the switching power supply operating frequency Switching Transistors Placed in the center of board Using fast recovery diodes LED area do not form a current loop Shorten the cables and printed circuit board traces In recent years, rapid development of high-brightness LED applications, especially in the signs, cross Communicate Lights aspects. The automotive applications read more

High Power Rgb Led Driver Supports Color Lighting Design - Electronics Industry

By: zerry | 2011-01-27 | Computer
Architectural and decorative lighting on the appropriate mix of the next generation through the red, green and blue LED output colors can be more comprehensive. In such a high-brightness, multi-LED series applications, the typical on-the decline may reach 22V to 36V, 1A to absorb the current 2A. read more

Led Tube drive technology development trend analysis

By: zll10417 | 2010-10-11 | Business Opportunities
From a technical point of view of the market DC Led Tube light-driven technology needs analysis, high technology, the DC / DC Buck and high-efficiency resonant half-bridge (LLC) + PFC topology and power factor correction ((PFC) + Pulse Width Control (PWM) are two average current mode controller to form the new AC / DC driver IC will appear in a new generation of its vitality. read more

Iwata Buddy Edn's "most Innovative Product Award" Presentation Iw3610 Dimmable Led Driver Ic

By: zerry | 2011-02-23 | Computer
Iwata, the company's digital products, power IC and a leading provider of technology, recently announced that, iW3610 AC / DC Dimmable LED lighting has become a digital power controller for power lighting in EDN 20 Innovation Award Most Innovative Product Award competition category. read more

Building a Programmable Logic Controller Model

By: PLC | 2010-12-16 | Technology
The primary functions of a Programmable Logic Controller (PLC) are reading sensors, executing sequence control programs, and updating actuators. PLCs interact generally with target plants by a time driven approach. That is, PLC captures the state change of the target plants and drives the actuators by acyclic scan. The period of the cyclic scan is called generally by a scan time (T). read more

CMOS LED driver designed to improve the error amplifier

By: zerryxu | 2011-03-30 | Technology
Introduction of modern portable digital devices can not do without the monitor, but as a white backlight LED (such as life, energy consumption) have in many ways better than the (LED) of the traditional CCFL (cold CathodeFluorescentLamps, cold cathode fluorescent lamp) several times or even ten times, by its performance, therefore, as the display backlight has become a trend. read more

Led Panel Light Is A Soft Light

By: hookah | 2010-10-19 | Small Business
Led panel light is a soft light read more

Led panel light is a soft light

By: zll10417 | 2010-10-19 | Business Opportunities
Led panel light is a soft light read more

Small Lcd Backlight Led Driver Circuit Design And Analysis

By: zerry | 2010-12-30 | Computer
Over the past few years, the small color LCD display has been integrated into the increasingly broad range of products. Color display was configured as a luxury phone, but now, even in entry-level phone, color has become a standard. read more