Series AMLDLW-Z

Up to 1000mA | LED Driver

www.aimtec.com

Tel: +1 514 620 2722

Toll free: + 1 888 9 AIMTEC

(924 6832)

F 051e R9

4 of 11

North America only

Resistive Dimming Control

A simplified dimming control can be achieved using a variable resistor connected between VADJ and GND. Capacitor CADJ

is optional, it is installed to limit AC mains interference and high frequency noise. The recommended value of CADJ is

0.22µF.

NOTE: Typical error is ±10% with resistive dimming control

Output Current Adjustment by PWM Control:

Driving VADJ Directly

A Pulse Width Modulated (PWM) signal with a duty cycle of DPWM can be applied directly to VADJ pin as shown below.

Model Number

X

AMLDLW-3035Z

0.280

AMLDLW-3050Z

0.197

AMLDLW-3070Z

0.1388

AMLDLW-30100Z

0.095

Driving VADJ Via Open Collector Transistor

The VADJ can also be driven via an open collector transistor as shown below.

The diode and resistor serve to suppress any possible high amplitude negative voltage spikes to the VADJ input resulting

from the collector to emitter capacitance of the transistor. Any negative voltage spikes will cause errors in output current

and/or unstable driver operation.

AMLDLW-Z

-Vin

VADJ

+Vout

1

1

-Vout

PWM

0V

1.25V

GND

Last LED

AMLDLW-Z

-Vin

VADJ

+Vout

1

1

-Vout

RADJ

CADJ

The output current is given by:

0.1 x DPWM

X

Iout ˜

[for 0<DPWM<1]

AMLDLW-Z

-Vin

VADJ

+Vout

1

1

-Vout

PWM

0V

GND

1

Last LED

1.25V

10K