FX5959G701 Datasheet, PDF (9/11 Pages) Vishay Siliconix – Power LED Driver the Smallest and Low Profile, Constant Current Source 0 - 2.0A, 2.5V to 7V, with 450W/in3 Power Density and High Efficiency

DEMONSTRATION BOARD
TEST SET-UP AND OPERATION
Pins SD (Shut Down), PWM and SYNC (Synchronization) are
internally connected on the demo board to Vin.
1. Connect the DB according to the circuit drawing below
without connecting the LED
2. Use DC power supply, with current capability of twice the
output current.
3. Adjust V_TP with R1 trimmer to a typical voltage of 0.6V above
the V_L (LED voltage).
4. Connect the LED or equivalent resistor value according to
the circuit drawing below and adjust R0 trimmer to the
required current.
5. Input voltage can be adjusted between 2.5V to V_TP.
FX5959G701
Vishay
R0
Current Adjust
1.223in
(31.07 mm)
0.332 in
8.44 mm)
Ø0.105 in
(2.66 mm)
R0
0.1 in
(2.54 mm)
R1
1.13 in
(28.7 mm)
Ø0.105 in
(2.66 mm)
0.23in
(5.84 mm)
0.31 in
(7.9 mm)
0.1 in
(2.54 mm)
PIN (0.64 mm)
View from bottom side
PIn 1
PIN No:
1
2
3
4
5
6
7
8
Description
GND
VL
GND
Vin
Vin
GND
VL
TP
RECOMMENDED BOARD LAYOUT
0.1 in (2.54 mm)
8
Ø Pad Recommended 0.060 in
1
Ø Drill size
5
0.040 10 (1.02 mm)
0.1 in (2.54 mm)
4
Standard Strip 0.1" (2.54 mm) Centers,
Double Row
All Positions Filled
V
R1
R0
Vin
R1
VTP
R0 VL
SD
PWM/PSM
+
SYNC
-
GND
FX5959G701ADJ Demo Board
A
V
Document Number: 10135
Revision: 18-Jan-05
For technical questions, contact [e-mail]
For marketing questions, contact [e-mail]
www.vishay.com
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