Series AMLDP-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.C

4 of 18

North America only

Output Current Adjustment by External DC Control Voltage:

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.

Ioutnom= Iout x Radj

Radj + 200K

The nominal output current is given by:

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

If the value of Radj is between 0 to 2M

Ω, the maximum adjustment range will be 25% to 90%, (for Vin –Vout <10VDC)

The nominal output current is given by:

Vadj

1.25

Iout

Ioutnom =

AMLDP-Z

-Vin

VADJ

Last LED

+Vout

1

1

-Vout

0.3 -1.25V

GND

AMLDP-Z

-Vin

VADJ

+Vout

1

1

-Vout

+5v

10K

30K

R2

R1

Vctrl

VADJ =

R2

R1 + R2

X Vctrl

AMLDP-Z

-Vin

VADJ

+Vout

1

1

-Vout

+Vin

1

TL431

10K

10K

4.7K

AMLDP-Z

-Vin

VADJ

+Vout

1

1

-Vout

RADJ

CADJ