AL3065

Document number: DS37677 Rev. 1 - 2

2 of 15

www.diodes.com

April 2015

© Diodes Incorporated

AL3065

Pin Descriptions

Pin Number

Pin Name

Function

1

CH4

LED current sink 4. Leave the pin open directly if not used.

2

ISET

LED current set pin. The corresponding maximum current of all 4 strings is set through connecting a

resister from this pin to GND.

3

OVP

Overvoltage protection pin. When the OVP pin voltage exceeds 2.0V, the OVP is triggered and the power

switch is turned off. When the OVP pin voltage drops below Hysteresis voltage, the OVP is released and

the power switch will resume normal operation.

4

RT

Frequency control pin.

5

EN

ON/OFF control pin. Forcing this pin voltage above 2.4V enables the IC while below 0.5V shuts down the

IC. When the IC is in shutdown mode, all functions are disabled to reduce the supply current below 3µA.

6

CS

Power switch current sense input.

7

OUT

Boost converter power switch gate output. This pin outputs high voltage (10V) to drive the external N-

MOSFET.

8

VCC

10V linear regulator output pin. This pin should be bypassed to GND with a ceramic capacitor.

9

VIN

Supply input pin. A capacitor (typical 10µF) should be connected between the VIN and GND to keep the

DC input voltage constant.

10

ADIM

Analog dimming pin, used in conjunction with DIM. When a DC voltage between 0V and 1.5V is applied

to this pin analog dimming is achieved if DIM is tied HIGH. When a capacitor is connected between this

pin and GND, the PWM signal applied to the DIM pin is filtered and modulates the output current. When

this pin is connected to a HIGH level, direct PWM dimming is achieved.

11

COMP

Soft-start and control loop compensation.

12

DIM

PWM dimming control pin, used in conjunction with ADIM. Apply the PWM signal to this pin. Tie this pin

to logic HIGH level, for analog dimming.

13

CH1

LED current sink 1. Leave the pin open directly if not used.

14

CH2

LED current sink 2. Leave the pin open directly if not used.

15

GND

Ground

16

CH3

LED current sink 3. Leave the pin open directly if not used.