FX4040G7XX Datasheet, PDF (4/6 Pages) Vishay Siliconix – Universal Constant Current Control 1 Channel and 2 Channels The Smallest and Low Profile Constant Current Control 0 - 2.0A, up to 35V, with 170W/in3

FX4040G7XX
Vishay
DEMONSTRATION BOARD
TEST SET-UP AND OPERATION
1. Connect the DB according to the circuit drawing below
without connecting the LED
2. Use DC power supply, with at least capability of 40V; 2A.
3. For applying up to 35V input voltage please add 10µF
(at least 35V rating) between points R₀ and V_L.
4. Connect R₀ resistor between points Vin and R_0.
5. Adjust R₀ to full CCW.
6. Connect the LED or equivalent resistor value according to
the circuit drawing below.
7. Adjust power supply to a minimum of 1V above the LED
voltage*.
8. Increase R₀ value by adjusting it CW. See how the output
current rises.
*note: W_D**= (Vin - V_L) I_L < 1.5W
Vin - VL = < 20V
**WD = Power Dissipation
0.64in
(16.3 mm)
VISHAY
FX4040G7XX
B0014
0.874 in
(22.2 mm)
RECOMMENDED BOARD LAYOUT
0.1 in (2.54 mm)
8
Ø Pad Recommended 0.060 in
1
Ø Drill size
5
0.040 in (1.02 mm)
0.1 in (2.54 mm)
4
0.1 in
(2.54 mm)
0.1 in
(2.54 mm)
0.23in
(5.84 mm)
0.016 in
0.031 in
(0.41 mm) x (0.79 mm)
0.31 in
(7.9 mm)
Standard Strip 0.1" (2.54 mm) Centers,
Double Row
All Positions Filled
View from bottom side
PIn 1
Configuration
GND
Vin
V_L
R₀
Single Component
Pin
5
4
3
Double Component Channel 1 Double Component Channel 2
Pin
Pin
6, 7
5
8
4
1
3
2
Channel 1
R0
C0
Channel 2
R0
C0
5
Vin
3
4
R0
VL
A
8
Vin
2
1
R0
VL
A
+
+
-
GND
V
-
GND
V
6, 7
6, 7
Document Number: 10138
Revision: 22-Sep-04
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