PLED Series
PLED Open LED Protectors
HF
RoHS
PLED Series
Description
The open LED protector provides a switching electronic
shunt path when an LED in an LED array fails as an open
circuit. This ensures that the entire array of LEDs will
continue to function even if a single LED in the array does
not. This provides higher reliable lighting functions in
applications such as headlights, aircrafts, aircraft runway
lighting, roadside warning lights, etc. This device is
compatible with one, two and three watt LEDs that have
a nominal 3V forward characteristic. The PLED series is
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.
Features & Benefits
• Fast switching
• Compatible with PWM
dimming speeds of up to
10 KHz
• RoHS compliant and
halogen-free
Agency Approvals - PENDING
Agency
Agency File Number
E133083
Schematic Symbol
MT
2
• Automatically resets after
power cycle
• Available in low profile,
small footprint QFN
and Standard DO214AA
packages
• Compatible with industrial
lighting environments
MT1
Cathode
Control
Circuit
Electrical Characteristics
V
BR
breakdown
Part Number
Marking
Min
PLED6Q12
PLED6S
PLED9Q12
PLED9S
PLED13Q12
PLED13S
PLED18Q12
PLED18S
PL6
PL6
PL9
PL9
PL13
PL13
PL18
PL18
6
6
9
9
13
13
18
18
Volts
Max
16
16
18
18
26
26
33
33
V
DRM
breakdown
Volts
Min
6
6
9
9
13
13
18
18
I
H
mAmps
Min
5
5
5
5
5
5
5
5
I
S
mAmps
Max
100
100
100
100
100
100
100
100
I
T
@V
T
Amps
Max
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
V
T
@ I
T
= 1
Amp
Volts
Max
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
Critical rate of
rise dV/dt
Volts
Max
250V/µs
250V/µs
250V/µs
250V/µs
250V/µs
250V/µs
250V/µs
250V/µs
©2010 Littelfuse, Inc.
Specifications are subject to change without notice.
2
Revision: July 08, 2010
PLED Series
PLED Series
PLED Open LED Protectors
Thermal Considerations
Package
QFN 3x3
Symbol
DO-214
Parameter
Operating Junction Temperature Range
Storage Temperature Range
Thermal Resistance: Junction to Ambient
Value
-40 to +150
-65 to +150
DO-214: 90
QFN: 120
Unit
°C
°C
°C/W
T
J
T
S
R
θ
JA
V-I Characteristics
+I
V
BR
vs. Junction Temperature
14
I
T
I
S
I
H
P e rc e n t o f V
BR
C h a n g e – %
12
10
8
6
4
2
0
-4
-6
-8
-40 -20
0
20
40
60
80
100 120 140 160
-V
V
T
V
drm
V
BR
+V
25 ˚C
-I
Junction Temperature (T
J
) – ˚C
Normalized DC Holding Current vs. Case Temperature
2.0
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
-40 -20
0
20
40 60
80 100 120 140 160
LED Interference Test Circuit
Q1
i
H
(T
C
= 2 5 ˚C )
2.0
, 1/4 W
110 k
, 1/4 W
LED
Driver
i
H
25 ˚C
+
-
R a tio o f
V
bat
12 Vdc
PWM
Q2
2N2222
MT
2
Control
Circuit
PLED
MT
1
Case Temperature (T
C
) – ˚C
ON/OFF
Switch
©2010 Littelfuse, Inc.
Specifications are subject to change without notice.
3
Revision: July 08, 2010
PLED Series
PLED Series
PLED Open LED Protectors
6 LEDs in Series 50% Duty Cycle 10Khz
5 LEDs and 1 PLED in Series 50% Duty Cycle 10Khz
Note: These two graphs show the current magnitude through the LED string with and without the PLED included. There is no noticeable effect on the LED current magnitude when the
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.)
PLED in the Off-State 10Khz
PLED device zeners and then turns fully on 10Khz
Channel 1: current through LEDs (318 mA)
Channel 2: voltage across PLED device (4.5 V)
Channel 1: current through LEDs (346 mA) and PLED device once it is fully turned on 2.5 μsec later
Channel 2: voltage across PLED device (21.3 V before PLED crowbars with 2 V drop)
©2010 Littelfuse, Inc.
Specifications are subject to change without notice.
4
Revision: July 08, 2010
PLED Series
PLED Series
PLED Open LED Protectors
Soldering Parameters
Reflow Condition
- Temperature Min (T
s(min)
)
Pre Heat
- Temperature Max (T
s(max)
)
- Time (min to max) (t
s
)
Average ramp up rate (Liquidus Temp
(T
L
) to peak
T
S(max)
to T
L
- Ramp-up Rate
Reflow
- Temperature (T
L
) (Liquidus)
- Temperature (t
L
)
Pb – Free assembly
150°C
200°C
60 – 180 secs
3°C/second max
3°C/second max
217°C
60 – 150 seconds
260
+0/-5
°C
30 seconds
6°C/second max
8 minutes max
260°C
Peak Temperature (T
P
)
Time within 5°C of actual peak
Temperature (t
p
)
Ramp-down Rate
Time 25°C to peak Temperature (T
P
)
Do not exceed
Environmental Specifications
High Temperature
Voltage Blocking
Temperature Cycling
Biased Temperature &
Humidity
High Temperature
Storage
Low Temperature
Storage
Thermal Shock
Resistance to
Solder Heat
MIL
-STD-750: Method 1040, Condition A
80% min V
DRM
(VAC-peak), 150°C,
504 hours
MIL
-STD-750: Method 1051
-65°C to 150°C, 15-minute dwell,
100 cycles
EIA/JEDEC: JESD22-A101
52VDC, 85°C, 85%RH, 1008 hours
MIL
-STD-750: Method 1031
150°C, 1008 hours
-65°C, 1008 hours
MIL
-STD-750: Method 1056
0°C to 100°C, 5-minute dwell,
10-second transfer, 10 cycles
MIL
-STD-750: Method 2031
260°C, 10 seconds
Physical Specifications
Terminal Material
Terminal Finish
Body Material
Copper Alloy
100% Matte Tin Plated
UL recognized epoxy meeting flammability
classification 94V-0
©2010 Littelfuse, Inc.
Specifications are subject to change without notice.
5
Revision: July 08, 2010
PLED Series
PLED Series
PLED Open LED Protectors
Dimensions - QFN (3x3) Package
TOP VIEW
A
BOTTOM VIEW
C
J
E
Dimensions
A
B
Inches
Min
0.114
0.114
0.075
0.011
0.076
0.035
0.000
0.004
0.004
0.056
0.038
0.096
0.082
Typ
0.118
0.118
0.079
0.015
0.080
0.039
0.004
0.008
0.008
0.060
0.042
0.100
0.086
Max
0.122
0.122
0.083
0.019
0.084
0.043
0.008
0.012
0.012
0.064
0.046
0.104
0.090
Min
2.900
2.900
1.900
0.285
1.930
0.900
0.000
0.100
0.100
1.143
0.970
2.440
2.080
Millimeters
Typ
3.000
3.000
2.000
0.385
2.030
1.000
0.100
0.200
0.200
1.530
1.070
2.540
2.180
Max
3.100
3.100
2.100
0.485
2.130
1.100
0.200
0.300
0.300
1.630
1.170
2.640
2.280
B
F
C
E
F
END VIEW
H
K1
SIDE VIEW
K2
H
J
K1
K2
M2
M1
N2
N1
M2
M1
1.27mm
0.050”
1.50mm
0.059”
M1
M2
N1
N2
2.54mm
0.100”
Recommended solder pad layout
(Reference Only)
Dimensions - DO-214 AA Package
B
D
CASE TEMPERATURE
MEASURING POINT
Dimensions
A
Inches
Min
0.130
0.201
0.077
0.159
0.030
0.075
0.002
0.077
0.006
Max
0.156
0.220
0.087
0.181
0.063
0.096
0.008
0.104
0.016
Millimeters
Min
3.30
5.10
1.95
4.05
0.75
1.90
0.05
1.95
0.15
Max
3.95
5.60
2.20
4.60
1.60
2.45
0.20
2.65
0.41
C
A
B
C
D
K
H
F
E
F
G
E
G
H
K
0.079"
(2.0mm)
0.110"
(2.8mm)
0.079"
(2.0mm)
Recommended
Soldering Pad Outline
©2010 Littelfuse, Inc.
Specifications are subject to change without notice.
6
Revision: July 08, 2010
PLED Series
嵌入式系统
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