Datasheet

Series AMLDLW-Z
Up to 1000mA | LED Driver
www.aimtec.com Tel: [phone] Toll free: + 1 888 9 AIMTEC
(924 6832)
F 051e R9 5 of 11 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.
Output Current Adjustment by PWM Control (Dimming):
A PWM signal must have a frequency of greater than 100Hz to prevent any visible flicker.
Output Current Adjustment by PWM Control (Flash):
Discharge
Vcc
Reset
Out
CRT_V
GND
NE 555
Trigger
Threshold
7
84
3
5
1
2
6
+++
-
--
10uF
35V
10uF
16V
AMSR-7805-Z
+Vin
-Vin
1
1
1N4148
+
-
VR
100K
470
+
-
+
-
1
3.3K
1N4148
2SD11782K
210
100nF
100nF
100nF
100nF
PMW
AMLDLW-Z
Pin 2 (VADJ)
AMLDLW-Z
Pin 1
AMLDLW-Z
-Vin
VADJ
1
st
LED
+Vout
1
1
-Vout
MCU
GND
1
10K
Last LED