AS1111 datasheet(14/23 Pages) AMSOSRAM

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AS1111 数据表(PDF) 14 Page - ams-OSRAM 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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