AS1101 AMSCO, AS1101 Datasheet - Page 8

• Manufacturer Part Number: AS1101
• Description: (AS1101 - AS1104) Low-Dropout LED Drivers
• Manufacturer: AMSCO

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AS1101, AS1102, AS1103, AS1104
Data Sheet
7.1 Setting the LED Current
The current going into the LEDs is approximately OCMR times greater then the current I
by V
For V
Typical Performance Characteristics on page 5. For any other option, the value of I
graph “I
LED Brightness can also be adjusted by driving pin ENABLE or pin CTRL with a PWM signal.
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SET
SET
SET
and R
= 3V and a specific LED current, the R
vs. V
SET
CTRL
(see Figure 4) according to the formula:
” on page 7.
I
LED
= OCMR x (V
SET
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value can be determined using the diagram shown in Section 6
Revision 1.3
SET
R
SET
- V
CTRL
)
SET
can be determined using the
SET
austriam i c r o
. LED current is controlled
Setting the LED Current
systems
(EQ 1)
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