1
PLED Open LED Protectors
Revision: June 16, 2011
©2011 Littelfuse, Inc.
Specifications are subject to change without notice.
PLED Series
PLED Series
PLED Series
RoHS
Description
PLED Series open LED protectors provide a switching
electronic shunt path when an LED in an LED string fails as
an open circuit. This ensures that the remaining string of
LEDs will continue to function if a single LED does not.
PLED 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 applictions.
Compatible with one, two and three watt LEDs that have
a nominal 3V forward characteristic, PLED Series devices
are available in two surface mount packages, the DO-214
and the Quad Flat Pak No-lead (QFN). The QFN’s low
profile, chip scale package (CSP) is ideal for dense board
applications.
Electrical Characteristics (All parameters are measured at T=25°C unless otherwise noted)
Part Number Marking
VBR
breakdown
VDRM
breakdown IHISIT@VT
VT @ IT = 1
Amp
Critical rate of
rise dV/dt
Volts Volts mAmps mAmps Amps Volts Volts
Min Max Min Min Max Max Max Max
PLED6Q12 PL6
6166
5 100 1.0 1.2 250V/μs
PLED6S PL6
PLED9Q12 PL9
9189
PLED9S PL9
PLED13Q12 PL13
13 26 13
PLED13S PL13
PLED18Q12 PL18
18 33 18
PLED18S PL18
Features & Benefits
t'BTUTXJUDIJOH
t"VUPNBUJDBMMZSFTFUTBGUFS
power cycle
t"WBJMBCMFJOMPXQSPmMF
small footprint QFN
and Standard DO214AA
packages
t$PNQBUJCMFXJUIJOEVTUSJBM
lighting environments
t$PNQBUJCMFXJUI18.
frequencies up to 30 kHz
t3P)4DPNQMJBOUBOE
halogen-free
Agency Approvals
Agency Agency File Number
E133083
Schematic Symbol
Control
Circuit
MT2
MT1
Cathode
HF
2
PLED Open LED Protectors
Revision: June 16, 2011
©2011 Littelfuse, Inc.
Specifications are subject to change without notice.
PLED Series
PLED Series
Package Symbol Parameter Value Unit
QFN 3x3
DO-214
TJ0QFSBUJOH+VODUJPO5FNQFSBUVSF3BOHF -40 to +150 °C
TS4UPSBHF5FNQFSBUVSF3BOHF -65 to +150 °C
3șJA 5IFSNBM3FTJTUBODF+VODUJPOUP"NCJFOU
%01
%02
2'/1
2'/3
°C/8
Thermal Considerations
IH
IT
IS
VDRM
VT
+V
-V
+I
-I
VBR
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 oitaR
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
Vbat
12 Vdc
+
-
2.0 Ω, 1/4 W
110 kΩ, 1/4 W
Q2
2N2222
Q1
Control
Circuit
MT2
MT1
PLED
-8
-40 -20
-6
-4
0
2
4
6
8
10
12
14
Junction Temperature (T
J
) – ˚C
reP fo tnecV
BR
– egnahC%
25 ˚C
0 20 40 60 80 100 120 140 160
VBR vs. Junction Temperature
Normalized DC Holding Current vs. Case Temperature LED Interference Test Circuit
/PUFT
4UBOEBSE'31$#XJUI$PQQFS1BET3FDPNNFOEFE4J[F
"MVNJOVN1$#
5IJDLOFTTNN
(SBEF8N,5IFSNBM$POEVDUJWJUZ
5SBDFUIJDLOFTTP[
*OTVMBUJPOMBZFSUIJDLOFTTVN
4PMEFS1BE%JNFOTJPOT NNYNN3FDPNNFOEFE4J[F
"MVNJOVN1$#
5IJDLOFTTNN
(SBEF8N,5IFSNBM$POEVDUJWJUZ
5SBDFUIJDLOFTTP[
*OTVMBUJPOMBZFSUIJDLOFTTVN
4PMEFS1BE%JNFOTJPOT NNYNN3FDPNNFOEFE4J[F
3
PLED Open LED Protectors
Revision: June 16, 2011
©2011 Littelfuse, Inc.
Specifications are subject to change without notice.
PLED Series
PLED Series
6 LEDs in Series 50% Duty Cycle 10kHz 5 LEDs and 1
PLED
in Series 50% Duty Cycle 10kHz
PLED in the Off-State 10kHz PLED device zeners and then turns fully on 10kHz
$IBOOFMDVSSFOUUISPVHI-&%TN"
$IBOOFMWPMUBHFBDSPTT1-&%EFWJDF7
$IBOOFMDVSSFOUUISPVHI-&%TN"BOE1-&%EFWJDFPODFJUJTGVMMZUVSOFEPOçTFDMBUFS
$IBOOFMWPMUBHFBDSPTT1-&%EFWJDF7CFGPSF1-&%DSPXCBSTXJUI7ESPQ
/PUF5IFTFUXPHSBQITTIPXUIFDVSSFOUNBHOJUVEFUISPVHIUIF-&%TUSJOHXJUIBOEXJUIPVUUIF1-&%JODMVEFE5IFSFJTOPOPUJDFBCMFFGGFDUPOUIF-&%DVSSFOUNBHOJUVEFXIFOUIF
PLED is included in the circuit as compared to the LED current magnitude when the PLED is not in the circuit. (The conversion factor for the test measurement in the graphs above is
10mA/mV for the Pearson coil measurement, therefore, the current magnitude in the first figure is 10mA*8.9 = 89mA, while the second figure is 91mA.)
4
PLED Open LED Protectors
Revision: June 16, 2011
©2011 Littelfuse, Inc.
Specifications are subject to change without notice.
PLED Series
PLED Series
Soldering Parameters
Reflow Condition Pb – Free assembly
Pre Heat
- Temperature Min (Ts(min))150°C
- Temperature Max (Ts(max))200°C
- Time (min to max) (ts)60 – 180 secs
Average ramp up rate (Liquidus Temp
(TL) to peak ¡$TFDPOENBY
TS(max) to TL - Ramp-up Rate ¡$TFDPOENBY
Reflow - Temperature (TL) (Liquidus) ¡$
- Temperature (tL)60 – 150 seconds
Peak Temperature (TP)260+0/-5 °C
Time within 5°C of actual peak
Temperature (tp)30 seconds
Ramp-down Rate ¡$TFDPOENBY
Time 25°C to peak Temperature (TP)NJOVUFTNBY
Do not exceed 260°C
Physical Specifications
Environmental Specifications
High Temperature
Voltage Blocking
.*-45%.FUIPE$POEJUJPO"
80% min V%3. (VAC-peak), 150°C,
504 hours
Temperature Cycling
.*-45%.FUIPE
-65°C to 150°C, 15-minute dwell,
100 cycles
Biased Temperature &
Humidity
&*"+&%&$+&4%"
7%$¡$3)IPVST
High Temperature
Storage
.*-45%.FUIPE
150°C, 1008 hours
Low Temperature
Storage -65°C, 1008 hours
Thermal Shock
.*-45%.FUIPE
0°C to 100°C, 5-minute dwell,
10-second transfer, 10 cycles
Resistance to
Solder Heat
.*-45%.FUIPE
260°C, 10 seconds
Terminal Material Copper Alloy
Terminal Finish .BUUF5JO1MBUFE
Body Material 6-SFDPHOJ[FEFQPYZNFFUJOHnBNNBCJMJUZ
classification 94V-0
5
PLED Open LED Protectors
Revision: June 16, 2011
©2011 Littelfuse, Inc.
Specifications are subject to change without notice.
PLED Series
PLED Series
Dimensions - QFN (3x3) Package
Dimensions - DO-214 AA Package
2.54mm
0.100”
1.50mm
0.059”
1.27mm
0.050”
Recommended solder pad layout
(Reference Only)
H
K1
N2
N1
END VIEW SIDE VIEW
M2 M2
M1
M1
K2
F
E
CJ
B
A
TOP VIEW BOTTOM VIEW
B
D
A
C
H
G
KF
CASE TEMPERATURE
MEASURING POINT
0.079"
(2.0mm)
0.079"
(2.0mm)
0.110"
(2.8mm)
E
Recommended solder pad layout
(Reference Only)
Dimensions Inches .JMMJNFUFST
.JO Typ .BY .JO Typ .BY
A 0.114 0.118 0.122 2.900 3.000 3.100
# 0.114 0.118 0.122 2.900 3.000 3.100
C   0.083 1.900 2.000 2.100
E 0.011 0.015 0.019 0.285 0.385 0.485
F  0.080 0.084 1.930 2.030 2.130
H 0.035 0.039 0.043 0.900 1.000 1.100
J 0.000 0.004 0.008 0.000 0.100 0.200
, 0.004 0.008 0.012 0.100 0.200 0.300
, 0.004 0.008 0.012 0.100 0.200 0.300
. 0.056 0.060 0.064 1.143 1.530 1.630
. 0.038 0.042 0.046   
N1 0.096 0.100 0.104 2.440 2.540 2.640
N2 0.082 0.086 0.090 2.080 2.180 2.280
Dimensions Inches .JMMJNFUFST
.JO .BY .JO .BY
A 0.130 0.156 3.30 3.95
#0.201 0.220 5.10 5.60
C  1.95 2.20
D 0.159 0.181 4.05 4.60
E 0.030 0.063  1.60
F 0.096 1.90 2.45
G 0.002 0.008 0.05 0.20
H 0.104 1.95 2.65
,0.006 0.016 0.15 0.41
6
PLED Open LED Protectors
Revision: June 16, 2011
©2011 Littelfuse, Inc.
Specifications are subject to change without notice.
PLED Series
PLED Series
Tape and Reel Specification - QFN (3x3)
A
B
D
C
W1
N
Reel Dimension
K0
P0
P1
W
D0
A1
D1
P2
E2
F
W0
CARRIER TAPE
COVER TAPE
TE1
B0
Tape Dimension Items
TRAILER
160mm MIN
LEADER
400mm MIN
START
END
CARRIER TAPE COVER TAPE
Leader and Trailer Dimension of the Ttape
CATHODE BAR
ON THIS SIDE
Symbols Description Inches .JMMJNFUFST
.JOJNVN .BYJNVN .JOJNVN .BYJNVN
A3FFM%JBNFUFS N/A 12.992 N/A 330.0
# %SJWF4QPLF8JEUI 0.059 N/A 1.50 N/A
C Arbor Hole Diameter 0.504 0.531 12.80 13.50
D Drive Spoke Diameter  N/A 20.20 N/A
N Hub Diameter 1.969 N/A 50.00 N/A
8 3FFM*OOFS8JEUIBU)VC 0.488  12.40 14.40
A0 1PDLFU8JEUIBUCPUUPN 0.126 0.134 3.20 3.40
# Pocket Length at bottom 0.126 0.134 3.20 3.40
D0 Feed Hole Diameter 0.059 0.063 1.50 1.60
D1 Pocket Hole Diameter 0.059 N/A 1.50 N/A
E1 Feed hole Position 1 0.065  1.65 1.85
E2 Feed hole Position 2 0.400 0.408 10.15 10.35
F Feed hole center-Pocket hole 0.215 0.219 5.45 5.55
, Pocket Depth 0.039 0.051 1.00 1.30
P0 Feed hole Pitch 0.153 0.161 3.90 4.10
P1 Component Spacing 0.311 0.319  8.10
P2 Feed hole center-Pocket hole  0.081 1.90 2.06
T Carrier Tape Thickness 0.010 0.014 0.25 0.35
8 &NCPTTFE$BSSJFS5BQF8JEUI 0.453 0.484 11.50 12.30
8 $PWFS5BQF8JEUI 0.358 0.366 9.10 9.30
Part Marking System
PLX
XXXXX
Cathode Bar to
Indicate Diode Direction
DO-214
PLX
XXXXX
QFN
Cathode Bar to
Indicate Diode Direction
Part Numbering System
Packaging
Package Description Packaging Quantity Industry Standard
Q12 2'/Y 5000 EIA-481-1
SDO-214 2500 EIA-481-1
PLED X Q12
TYPE
PLED: LED Protector
V
6 Volts
9 Volts
13 Volts
18 Volts
PACKAGE TYPE
Q12: 3.0x3.0mm QFN
S: DO-214
DRM
7
PLED Open LED Protectors
Revision: June 16, 2011
©2011 Littelfuse, Inc.
Specifications are subject to change without notice.
PLED Series
PLED Series
DO-214 Embossed Carrier Reel Pack (RP)
Meets all EIA-481-1 Standards
0.472
(12.0) 0.36
(9.2)
0.315
(8.0)
0.157
(4.0)
0.49
(12.4)
0.512 (13.0) Arbor
Hole Dia.
12.99
(330.0)
Dimensions
are in inches
(and millimeters).
Direction of Feed
0.059DIA
(1.5)
Cover tape
Cathode bar on this side