Littelfuse PLEDxUx User Manual
PLED Open LED Protectors
2
PLED Unidirectional Series
PLED Unidirectional Series (PLEDxUx)
Description
PLED Unidirectional Series (PLEDxUx Series) open LED
protectors provide a switching electronic shunt path around
a single LED that fails as an open circuit. This ensures
the remaining string of LEDs will continue to function
even though a single LED in the string has failed open.
It also provides reverse battery or reverse power polarity
protection.
PLED Unidirectional Series devices were designed to
enable higher reliability in outdoor LED lighting applications
such as street lighting, outdoor signage, aircraft runway
lighting, roadside warning lights and other applications.
Compatible with one, two and three watt LEDs that have
a nominal 3V forward characteristic, PLED Unidirectional
Series devices are available in two surface mount packages,
the DO-214AA and the Quad Flat Pak No-lead (QFN). The
QFN’s low profile, chip scale package (CSP) is ideal for
dense board applications.
Agency Approvals
Agency Agency File Number
E133083
Features & Benefits
• Fast switching
• Reverse Battery/Power
Protection
Schematic Symbol
• Automatically resets after
power cycle
MT
• Available in low prole,
small footprint QFN
Control
Circuit
and Standard DO214AA
packages
• Compatible with industrial
MT1
Cathode
(bar marking side)
lighting environments
Electrical Characteristics (All parameters are measured at T=25°C unless otherwise noted)
Part Number Marking
PLED6UQ12 PL6U
PLED6US PL6U
PLED9UQ12 PL9U
PLED9US PL9U
PLED13UQ12 PL13U
PLED13US PL13U
PLED18UQ12 PL18U
PLED18US PL18U
V
BR
breakdown
Volts Volts mAmps mAmps Amps Volts Amps Volts Volts
Min Max Min Max Max Max Max Max Max Max
6 16 6
9 18 9
13 26 13
18 33 18
V
DRM
breakdown
I
H
30 50 1. 0 1. 2 1. 0 1. 0 250V/µs
I
IT@V
S
T
VT @ IT =
1 Amp
• Compatible with PWM
frequencies up to 10 kHz
• RoHS compliant and
halogen-free
F
VF @ IF =
1 Amp
IF@V
Critical rate of
rise dV/dt
©2013 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com for current information.
1
Revision: November 12, 2013
PLED Unidirectional Series
PLED Open LED Protectors
QFN 3x3
=)
Q1
C%
PLED Unidirectional Series
Thermal Considerations
Package Symbol Parameter Value Unit
T
DO-214AA
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)
J
T
S
R
θ
JA
Thermal Resistance: Junction to Ambient
Operating Junction Temperature Range -40 to +150 °C
Storage Temperature Range -65 to +150 °C
DO-214AA: 90
DO-214AA: 40
QFN: 120
QFN: 60
1
2
°C/W
1
3
V-I Characteristics
Normalized DC Holding Current vs. Case Temperature LED Interference Test Circuit
H
i
fo oitaR
VBR vs. Junction Temperature
+I
14
12
I
T
I
S
I
H
V
-V
F
+V
V
V
DRM
T
V
BR
I
T
-I
2.0
1.8
C˚ 52
1.6
1.4
C
T(
1.2
H
i
1.0
25 ˚C
0.8
0.6
0.4
-40 -20
0 20 40 60 80 100 120 140 160
– egnah
10
8
6
BR
4
2
0
reP fo tnecV
-4
-6
-8
-40 -20
2.0 Ω, 1/4 W
110 kΩ, 1/4 W
+
V
bat
12 Vdc
-
PWM
25 ˚C
0 20 40 60 80 100 120 140 160
Junction Temperature (TJ) – ˚C
LED
Driver
Q2
2N2222
MT2
Control
Circuit
ON/OFF
Switch
MT1
Unidiretional
PLED
Case Temperature (TC) – ˚C
©2013 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com for current information.
2
Revision: November 12, 2013
PLED Unidirectional Series
Loading...