AL1791/1792/1793/1794

Document number:37957 Rev. 3 - 2

6 of 18

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September 2015

© Diodes Incorporated

AL1791/1792/1793/1794

Pin Descriptions

Pin

Part Number

Descriptions

Name

U-DFN4030-14

EN

1

Active-high to Enable, Internally Pulled Down

PWM4/GND

2

PWM Signal Input for channel 4, Internally Pulled Down for AL1794. GND for AL1791, AL1792,

and AL1793.

PWM3/GND

3

PWM Signal Input for channel 3, Internally Pulled Down for AL1793 and AL1794. GND for AL1791

and AL1792.

PWM2/GND

4

PWM Signal Input for channel 2, Internally Pulled Down for AL1792, AL1793, and AL1794. GND

for AL1791.

PWM1

5

PWM Signal Input for channel 1, Internally Pulled Down (Tied to GND when this channel is NOT

used).

LED1

6

Channel 1 LED Cathode

LED2/GND

7

Channel 2 LED Cathode for AL1792, AL1793, and AL1794. GND for AL1791.

GND

8

Ground

LED3/GND

9

Channel 3 LED Cathode for AL1793 and AL1794. GND for AL1791 and AL1792.

LED4/GND

10

Channel 4 LED Cathode for AL1794. GND for AL1791, AL1792, and AL1793.

LEDPG

11

LED Power Good Indication. Asserted Low to report insufficient headroom. Needs an external pull-

up resistor.

FAULTB

12

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

REF

13

VIN

14

Voltage Input

Exposed PAD

Exposed PAD

Exposed pad. Internally connected to GND.

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

It should not be used as electrical conduction path.