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| AMC7150 Datasheet, PDF (11/12 Pages) ADDtek Corp – 1.5A Power LED Driver | |||
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AMC7150
6. Thermal Issue of AMC7150: Temperature vs. Current
AMC7150 can work well under ambient temperature from -40â to +125â. Put the
AMC7150 EVM board into the programmable chamber to simulate the extreme temperature
environment, the AMC7150 EVM board can work well, as the measured waveforms of LED
current and the oscillating waveform of CT shown in the following table:
Table AMC7150 EVM can work well under ambient temperature from -40â to +125â.
Ambient
Temperature
Room
Temperature
Measured waveforms
Test condition
CH1ï¼iL
CH2ï¼CT
Vcc=12V
Rsen=0.5Ω
L=180uH
LED=1pcs
CT=820pF
Vf,LED=3.34V
Low
Temperature
-40â
CH1ï¼iL
CH2ï¼CT
Vcc=12V
Rsen=0.5Ω
L=180uH
LED=1pcs
CT=820pF
Vf,LED=3.626V
High
Temperature
+125â
CH1ï¼iL
CH2ï¼CT
Vcc=12V
Rsen=0.5Ω
L=180uH
LED=1pcs
CT=820pF
Vf,LED =3.2V
Copyright © 2006, ADDtek Corp.
http://www.addmtek.com
6-1
DA011 ï¼ September 1, 2006
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