AMLD-Z_13 Datasheet, PDF (5/13 Pages) AIMTEC – Up to 1000mA | LED Driver

Series AMLD-Z
Up to 1000mA | LED Driver
Output Current Adjustment by External DC Control Voltage (VCTRL) (continued):
+Vin
[ ^{VADJ =}
R3
R2 + R3
X 2.5
+Vin
If VCTRL = Vin
R1 _4.7K
R2
10K
1 _R3
TL431
R1 4.7K
If Vin is between 7 VDC and 36 VDC it is
recommended to use the circuit shown below
1
KDZTR-27B
VADJ
10K
AMLD-Z
-Vin
+Vout
1^st LED
1
-Vout
Last LED
1
R2
10K
1 _R3
TL431
If Vin is between 36 VDC and 60 VDC it is
recommended to use the circuit shown below
VADJ
10K
AMLD-Z
-Vin
+Vout
1^st LED
1
-Vout
Last LED
1
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
The output current is given by:
Ioutnom ≈
Iout x Radj
(Radj + 50K)
If RADJ is between 0 and 2M ohm, the maximum adjustment
range of Iout is 25% to 90% (for Vin – Vout < 20V)
CADJ
RADJ
VADJ
AMLD-Z
-Vin
+Vout
1^st LED
1
-Vout
1
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