AL1781/1782

Document number: DS41312 Rev. 1 - 2

3 of 18

www.diodes.com

August 2018

© Diodes Incorporated

AL1781/1782

Pin Descriptions

Pin Name

Part Number

Descriptions

AL1781

AL1782

TSSOP-16EP (Type

DX)

VIN

VIN

1

Power Supply for LED Driver

NC

NC

2

Not connected

NC

PWM2

3

PWM Signal Input for Channel-2, Internally Pulled Down for AL1782; Not

Connected for AL1781.

PWM1

PWM1

4

PWM Signal Input for Channel-1, Internally Pulled Down.

GND

GND

5

Ground for LED driver

NC

NC

6

Not connected

NC

LED2

7

Channel-2 LED Cathode for AL1782; Not Connected for AL1781.

NC

LED2

8

Channel-2 LED Cathode for AL1782; Not Connected for AL1781.

LED1

LED1

9

Channel-1 LED Cathode

LED1

LED1

10

Channel-1 LED Cathode

GND

GND

11

Ground for LED driver

GND

GND

12

Ground for LED driver

LEDPG

LEDPG

13

Adaptive thermal management adjusting current output.

FAULTB

FAULTB

14

Fault Report. Asserted Low to report faulty conditions. Needs an external pull-up

resistor.

TP

REF2

15

for AL1781, it is a test pin for AL1781, not to input any voltage to TP pin.

REF1

REF1

16

EP

EP

Exposed PAD

Exposed pad.

It should be externally connected to GND and thermal mass for enhanced thermal

impedance.

It should not be used as electrical conduction path.