Transistor Level Implementation Of Led Driver For Solid State Lighting
This thesis presents the transistor level implementation of led driver for solid state lighting (ssl). Ssl refers to a type of lighting that uses semiconductor light emitting diodes, organic light emitting diodes (oled), or polymer light emitting diodes (pled) as sources of illumination. Led driv...
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| Format: | Thesis |
| Language: | English |
| Published: |
2014
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| Subjects: | |
| Online Access: | http://eprints.usm.my/62902/ http://eprints.usm.my/62902/1/6-Pages%20from%2000001783564.pdf |
| Summary: | This thesis presents the transistor level implementation of led driver for solid state
lighting (ssl). Ssl refers to a type of lighting that uses semiconductor light
emitting diodes, organic light emitting diodes (oled), or polymer light emitting
diodes (pled) as sources of illumination. Led driver is an electrical device that
provides required led voltage and regulates the constant amount of power to the
needs of led or string of led. A buck converter is one type of dc- dc converter
that can step down the dc input voltage to the required led voltage. In the high
input voltage application of the rectified 220-240v ac, the modified buck converter
technique has been applied instead standard buck that requires complicated design of
bootsrap mode. The development of discrete led driver prototype is to prove the
buck converter operation. This circuit design has been integrated with the led driver
integrated circuit (ic) to provide a constant current output to the leds with the
intention to decrease the size, weight and cost. The design of led driver ic is started
with the behavioral modeling technique for proposed control circuit with integrated
power switch, dmos. The obtained parameters from behavioral model have been
implemented in the transistor level design using x-fab xdm10 1.0pm 350v process
technology. In this project, leds string will be driven as much as 20 with the total
forward voltage are 50-60v and the current is 350ma. |
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