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AS1111 Fiches technique(PDF) 13 Page - ams AG

No de pièce AS1111
Description  Low?밆ropout LED Drivers
PDF  22 Pages
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Fabricant  AMSCO [ams AG]
Site Internet  http://www.ams.com
Logo AMSCO - ams AG

AS1111 Fiches technique(HTML) 13 Page - ams AG

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ams Datasheet
Page 13
[v1-06] 2015-Apr-07
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AS1111 − Detailed Description
Setting of the LED Current
The current going into the LEDs is approximately OCMR times
greater than the current ISET. The LED current is controlled by
VSET and RSET according to the formula:
For VSET = 3V and a specific LED current, the value of RSET can
be determined using the graphs shown in Figure 12 and
Figure 13. For any other option, the value of ISET can be
determined using the graph in Figure 8.
LED brightness can also be adjusted by driving pin EN or pin
CTRL with a PWM signal.
Detailed Description
(EQ1)
ILED
OCMR
VSET VCTRL
–
RSET
-------------------------------------
⋅
=



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