Littelfuse PLEDxUx Series - Manual (Page 2)

2
PLED Open LED Protectors
Revision: November 12, 2013
©2013 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com for current information.
PLED Unidirectional Series
PLED Unidirectional Series
Package Symbol Parameter Value Unit
QFN 3x3 DO-214AA
T
J
Operating Junction Temperature Range -40 to +150 °C
T
S
Storage Temperature Range -65 to +150 °C
R
θJA
Thermal Resistance: Junction to Ambient
DO-214AA: 90 1
DO-214AA: 40 2
QFN: 120 1
QFN: 60 3
°C/W
Thermal Considerations
I
H
I
T
I
S
V
DRM
V
T
+V -V
+I
-I
V
BR
I
T
V
F
V-I Characteristics
0.4
-40 -20
0.6
0.8
1.0
1.2
1.4
1.6
1.8
2.0
Case Temperature (T
C
) – ˚C
fo
oit
a
R
i H
i H
T(
C
C˚
52
=)
25 ˚C
0 20 40 60 80 100 120 140 160
ON/OFF
Switch
PWM
LED
Driver
V bat
12 Vdc
+
-
2.0 Ω, 1/4 W
110 k Ω, 1/4 W
Q2
2N2222
Q1
Unidiretional
PLED Control
Circuit
MT 2
MT1
-8
-40 -20
-6
-4
0
2
4
6
8
10
12
14
Junction Temperature (T
J
) – ˚C
re
P
fo
tn
ecV
BR
–
eg
na
h
C%
25 ˚C
0 20 40 60 80 100 120 140 160
V
BR
vs. Junction Temperature
Normalized DC Holding Current vs. Case Temperature LED Interference Test Circuit
Notes:
1) Standard FR-4 PCB with Copper Pads (Recommended Size)
2) Aluminum PCB
Thickness: 1.6mm
Grade: 1-2 W/mK Thermal Conductivity
Trace thickness: 2 oz
Insulation layer thickness: 215 µm
Solder Pad Dimensions: 2.0mm x 2.8mm (Recommended Size)
3) Aluminum PCB
Thickness: 1.6mm
Grade: 1-2 W/mK Thermal Conductivity
Trace thickness: 2 oz
Insulation layer thickness: 60 µm
Solder Pad Dimensions: 1.27mm x 2.54mm (Recommended Size)