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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