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In this eBook we will show you everything about the "old" and the new LED that are currently used for new energy saving lighting systems. We will also show you the most important control strategies with software and hardware for the LED. Basics for the common lighting systems will be also provided.

 

This eBook with 112 pages start step by step with the basics of the "old" 20mA LED and the corresponding control strategies. After that we start with the new high power LED that take more than 1W power consumption.

The following chapters concern on the different constant current control application like  Buck-, Boost- and more. At the end we look also to the important  thermal management and the very new OLEDs.

This eBook is for the beginners that want to get all the information about the LED and LED control strategy without any complex mathematical explanation.

 

Content

 
Series resistance and LED

  • Introduction
  • Application
  • Power LED
  • LTSpice
  • LTSpice
  • White LED direct on power supply (Example_01)
  • Simulation (Example 01)
  • We are ready with LED control, or?
  • Voltage- and temperature dependence
  • LED parameter variation
  • Series resistance (Example 02)
  • Series resistance is not so bad!
  • Power LEDs
  • Power LEDs (Example 03)
  • Power LEDs (Example 03)
  • LED film

 Lighting systems

  • Introduction
  • Short history of the lighting systems
  • What is light?
  • Light consists of photons
  • Temperature- and luminescence radiator
  • Characteristic units
  • Why LED?
  • LEDs advantages

 LED

  • Semiconductor diode is open
  • Semiconductor diode is closed
  • Diode with light
  • CIE-Norm diagram for colours
  • Construction and optic
  • Colours and size
  • White colour!
  • Energy
  • Voltage-current characteristic (Example 04)
  • Real voltage-current diagram
  • Voltage current diagram
  • Voltage-current diagram example
  • LED current and LED brightness
  • Variation of the diagram
  • What should be constant current or voltage?
  • Data sheet
  • Life time
  • Driver

 Linear constant current controller

  • Why not series resistance?
  • What is constant voltage controller?
  • What is constant current controller?
  • Linear constant current controller
  • Simulation  (Example 05)
  • What is the problem? (Example 05)
  • Current controller versus series resistance
  • More than one LED (Example 06)
  • Several LEDs from one and the same bucket (Binning)
  • Power consumption (Example 06)
  • Linear controller LT3010 and LED (Example 06a)
  • LED on AC-voltage (Example 07)
  • Disadvantage of the linear controller

 Buck Converter

  • Introduction
  • Switched current
  • Down converter
  • Functionality part 1
  • Functionality part 2
  • SPICE example (Example 08)
  • DC/DC-converter
  • DC/DC-converter as constant current controller
  • Synchron converter
  • Buck and LED in SPICE (Example 09)

 LED-WEBENCH

  • Introduction
  • First example
  • Select the required parameter
  • Circuit proposal
  • Simulation
  • Simulation results
  • LM3402
  • Three LEDs in series
  • Serial/parallel LEDs
  • Series- and parallel connection
  • Other tools

 Boost Converter

  • Introduction
  • Functionality part 1
  • Functionality part 2
  • SPICE model (Example 10)
  • Practical example with IC von TI
  • Brightness dimmer
  • Dimmer with PWM
  • Two frequencies
  • LT3478 (Example 12)
  • Buck and dimmer with the IC LT3474

 Buck-Boost

  • Introduction
  • Inverting variant
  • Inverter
  • SPICE (Example 13)
  • Second invariant version (Example 14)
  • LT3531 (Example 15)
  • Buck or Boost
  • Further DC/DC-converter
  • AC/DC-converter
  • AC/DC-converter (Example 16)
  • Power Factor Correction
  • Semiconductor LED

 Thermal management

  • Everybody produce heating!
  • Life time and temperature
  • Life time and temperature
  • Heating transport
  • Determining the thermal resistance
  • Calculate the heating sink
  • Ventilator

 OLED, Laser Diode, IR-LED

  • Organic and inorganic
  • Dot- and area emitter
  • Application
  • Infrared
  • Laser-diode
  • Photo diode


The end





 


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LED

OLED

Buck

Boost

HB-LED

OSRAM

WEBENCH

LTSPICE

PFC

Power Factor Correction

Switching

LDO

HB-LED

Power-LED

Sepic