Series AMLD-Z

Up to 1000mA | LED Driver

www.aimtec.com

Tel: +1 514 620 2722

Toll free: + 1 888 9 AIMTEC

(924 6832)

F 051e R12.G

7 of 13

North America only

Driving the VADJ from a Microcontroller

The VADJ can be driven from an open drain output of a microcontroller as shown below. The diode and resistor serve to

suppress any possible high amplitude negative voltage spikes to the VADJ input resulting from the drain to source

capacitance of the FET. Any negative voltage spikes will cause errors in output current and/or unstable driver operation.

AMLD-Z

-Vin

VADJ

+Vout

1

1

-Vout

MCU

GND

1

3.3K

Last LED

Output Current Adjustment by PWM Control (Dimming):

A PWM signal must have a frequency of greater than 100Hz to prevent any visible flicker.

Discharge

Vcc

Reset

Out

CRT_V

GND

NE 555

Trigger

Threshold

7

8

4

3

5

1

2

6

+

+

+

-

-

-

10uF

35V

10uF

16V

AMSR-7805-Z

+Vin

-Vin

1

1N4148

+

-

VR

100K

470

+

-

+

-

1

3.3K

1N4148

2SD11782K

PMW

AMLD-Z

Pin 4 (VADJ)

AMLD-Z

Pin 2,3

210

100nF

100nF

100nF

100nF

Output Current Adjustment by PWM Control (Flash):

Discharge

Vcc

Reset

Out

CRT_V

GND

NE 555

Trigger

Threshold

7

8

4

3

5

1

2

6

+

+

+

-

-

-

100nF

10uF

16V

AMSR-7805-Z

+Vin

-

Vin

+

-

+

-

+

-

1

3.3K

1N4148

2SD11782K

PMW

AMLD-Z

Pin 4 (VADJ)

AMLD-Z

Pin 2,3

VR

100K

2K

210

10uF

35V

100nF

100nF

10uF

16V