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Power Supplies for LED Driving, 2nd Edition by Steve Winder

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Chapter 3

Driving LEDs

Abstract

This chapter builds on the previous chapter about light-emitting diodes (LEDs). We discovered that LEDs need a constant current and here methods of producing a constant current are discussed. Both linear and switching power supplies are introduced, with advantages and disadvantages being discussed. Parallel and series connection options are also discussed, with the effect of temperature included. Suggestions for methods of testing LED drivers are given.

Keywords

light-emitting diode
LED
constant current
linear regulator
switching regulator
parallel connection
series connection
current limiter
temperature dependency
power supply

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