40V Adjustable Current Sink Linear LED Driver

Version:PRE.002

Page 6

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DD313-4

Timing Diagram

Input

Output

50%

90%

50%

10%

Figure 3. Output timing

Pin Description

PIN NAME

I/O

DESCRIPTIONS

IOUT

O

Low output voltage constant current sink output

VCC

-

Supply voltage

REXT

I/O

A resistor between REXT and GND sets maximum current

PWM IN

I

PWM input

GND

-

Ground

ALARM OUT

O

Open drain output for reporting LED open circuit and driver thermal

issue