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MIC2299 Folha de dados(PDF) 13 Page - Micrel Semiconductor

Nome de Peças MIC2299
Descrição Electrónicos  3.5A Minimum, 2MHz High Brightness LED Driver
PDF  14 Pages
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Fabricante Electrônico  MICREL [Micrel Semiconductor]
Página de início  http://www.micrel.com
Logo MICREL - Micrel Semiconductor

MIC2299 Folha de dados(HTML) 13 Page - Micrel Semiconductor

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Micrel, Inc.
MIC2299
October 2007
13
M9999-101907-B
LED Protection
The operation of the Power LED must be limited to short
pulses to prevent overheating. This is usually controlled
by the micro controller in a typical application. For further
fail-safe protection, or where a micro controller is not
used, the temperature of the LED can be limited by the
addition of an NTC thermistor. The value should be
>100k
Ω at its maximum safe operating temperature.
This will then limit current drive to the LED as
temperature rises further and prevents overheating. This
thermistor should be connected directly from BRT to
GND. Reference Figure 10.
Figure 10. LED Thermal Protection



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