SEPM Series
RGB Multi Chip LED Modules
Features and Benefits
▪
High efficiency, 50 1m/W with all LEDs illuminated;
equivalent to CCFLs
▪
Low thermal resistance, R
θJC
= 6°C/W
▪
High optical output, 25 lm, with all LEDs illuminated
▪
Superior directivity
▪
5.23 mm × 13.7 mm case footprint, and
low 2.5-mm overall package height
▪
Silver-plated leadframe
▪
LED array of 8 RGB chips
Description
The SEPM series of LEDs provides a range of high-powered
AlGaInP red (λ
D
= 616 nm), and InGaN green (523 nm) and
blue (461 nm) LEDs that can be used in general lighting
applications, amusement and gaming equipment, and for
backlighting TFT displays. Each module combines 8 LED
chips in 4 separate channels.
Modular design allows the SEPM devices to be easily assembled
into string arrays by simply connecting the modules in series.
The devices also provide superior color balance throughout
the display because of the high density of LEDs that can be
achieved. This also minimizes the distance that power and
control lines must run between LEDs and from the LEDs to
the control electronics.
The white thermoplastic case is an innovative Sanken original
design with exceptional heat dissipation properties. The white
resin compound is especially formulated for superior reflectance
and transmittance of the generated light. Enhanced thermal
dissipation is achieved through the incorporated heatsink on the
bottom of the package. The heatsink can be mated directly to an
external radiator through the PCB for superior heat conduction
allowing dense placement of modules.
The leadframe is plated with silver, providing a highly-reflective
surface for the bottom and sides of the emitting area. The
terminals and heatsink are also silver-plated.
Package:
16-pin, 1.27-mm pitch, surface mount
Not to scale
V
B
5 to 20 V
L1
10
μH
Typical Application
D1
C
O
2.2
μF/50
V
8 SEPM modules, 8 LEDs each
SEP8Mx
SEP8Mx
SEP8Mx
SEP8Mx
SEP8Mx
SEP8Mx
SEP8Mx
SEP8Mx
5V
1
μF
36 V SW SW OVP
LED1
SEL1
SEL2
LED2
SEL3
Allegro
VIN
A8500 LED3
0.1
μF
LED Driver
10 V
IC
LED4
EN
PWM
APWM
LED5
SKIP
COMP
LED6
FSET
ISET
LED7
AGND PGND LED8
The SEPM devices can be mounted in tight
arrays on a single PCB substrate for ease of
manufacture and to provide a dense, uniform
appearance when illuminated.
The application shown here uses eight
SEP8Mx LED modules, each populated by
eight LEDs connected in series. Different
combinations of LEDs can be placed in the
modules
48101.001, Rev. 3
SEPM Series
Selection Guide
Part Number
LEDs
Channels
Color
Circuit
RGB Multi Chip LED Modules
Internal Circuit Diagram
(Pin Numbers Shown)
Packing
16
Red
SEP8MA4001
8
Green
Blue
2 LEDs in series
4 LEDs, 2 in series
2 LEDs in series
15
14
13
12
11
10
9
1000 pieces per reel
G
1
16
G
2
15
R
3
14
R
4
13
G
5
12
G
6
11
B
7
10
B
8
9
1000 pieces per reel
Red
SEP8MA8001
8
Green
Blue
2 LEDs in parallel
4 LEDs in parallel
2 LEDs in parallel
G
1
B
2
R
3
G
4
G
5
R
6
B
7
G
8
Absolute Maximum Ratings
Characteristic
Forward Current (Continuous)
Forward Current (Pulsed)
Reverse Voltage
Isolation Voltage
Operating Temperature
Storage Temperature
Symbol
I
f
I
fp
V
R
V
IS
T
opr
T
stg
Measured from device pins to heatsink, with DC voltage applied
Per element
Frequency, f = 1 kHz, pulse width, t
w
= 100
μs
Notes
Rating
40
100
5
±60
–40 to 85
–40 to 90
Units
mA
mA
V
V
°C
°C
Maximum Allowable Forward Current, I
f
(mA)
120
100
80
60
40
20
0
0
10
Duty Cycle (on-time), (%)
100
Maximum Allowable Forward Current, I
f
(mA)
Maximum Allowable Forward Current
versus Duty Cycle
T
A
= 25°C, t
w
≤
100
μs
Maximum Allowable Forward Current
versus Ambient Temperature
50
R
40
30
20
10
0
120
Without heatsink
0
20
40
60
80
100
50
30
15
JA
(°C/W)
Ambient Temperature, T
A
(°C)
All performance characteristics given are typical values for circuit or
system baseline design only and are at the nominal operating voltage and
an ambient temperature, T
A
, of 25°C, unless otherwise stated.
Allegro MicroSystems, Inc.
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
www.allegromicro.com
2
SEPM Series
RGB Multi Chip LED Modules
Operating Characteristics
Red LED AlGaInP, blue LED and green LED InGaN
Characteristic
Electrical
Red
SEP8MA4001
Forward Voltage (per LED channel)
V
f
SEP8MA8001
Reverse Current (per LED channel)
Optical
Red
Luminous Flux (all channels)
Φ
Green
Blue
Red
Dominant Wavelength
λ
D
Green
Blue
Thermal
Thermal Resistance
R
θJC
R
θJA
Junction to heat sink
Junction to ambient
–
–
6
120
–
–
°C/W
°C/W
I
f
= 20 mA T
A
= 25°C
I
f
= 20 mA / LED
3.5
12.0
1.5
615
518
455
5.0
17.0
2.2
625
524
460
–
–
–
635
530
465
lm
lm
lm
nm
nm
nm
I
R
V
R
= 5 V
Green
Blue
Red
Green
Blue
Each subcircuit: 2 chips in series;
I
f
= 20 mA, T
A
= 25˚C
3.4
5.4
5.2
1.7
2.7
2.6
–
4.4
6.4
6.2
2.2
3.2
3.1
–
5.4
7.8
7.6
2.7
3.9
3.8
10
V
V
V
V
V
V
μA
Symbol
Conditions
Min.
Typ.
Max.
Units
Each subcircuit: 1 chip in parallel;
I
f
= 20 mA, T
A
= 25˚C
Chromaticity
T
A
= 25°C, I
f
= 20 mA
0. 9
0. 8
0. 7
0. 6
0. 5
Y
0. 4
0. 3
0. 2
0. 1
0
0
0.1
0.2
0.3
0.4
X
0.5
0.6
0.7
0.8
0.146,
0. 038
0.699,
0.301
0. 151,
0.698
R
G
B
Allegro MicroSystems, Inc.
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
www.allegromicro.com
3
SEPM Series
RGB Multi Chip LED Modules
Directivity
T
A
= 25°C, I
f
= 20 mA, Viewing Angle
1,2
=
2θ
1/2
100
75
Long Axis Direction
Short Axis Direction
100
75
Red LEDs
50
2
1/2
=124°
Red LEDs
50
2
1/2
=121°
25
25
0
10
20
30
40
50
60
70
80
90
Relative Intensity (%)
Relative Intensity (%)
Green LEDs
100
100
75
Green LEDs
75
50
2
1/2
=133°
50
25
25
100
75
-90
-80
-70
-60
-50
-40
-30
-20
-10
100
75
Blue LEDs
50
Blue LEDs
2
1/2
=131°
50
25
25
0
10
20
30
40
50
60
70
80
90
Short Axis
Long Axis
Module
Top View
is the angular displacement from the indicated device
axis to 50% of peak intensity, on one side of that axis.
2
Viewing Angle, 2θ , is the included angle between
1/2
–
θ
1/2
and
θ
1/2
for the indicated axis.
1/2
1
θ
Relative Luminescence Spectrum
Blue at 100%, T
A
= 25°C, I
f
= 20 mA
Relative Luminescence (%)
100
80
60
40
20
0
380
Blue
Red
Green
430
Emission Frequency (nm)
480
530
580
630
-90
-80
-70
-60
-50
-40
-30
-20
-10
680
730
780
-90
-80
-70
-60
-50
-40
-30
-20
-10
0
10
20
30
40
50
60
70
80
90
0
0
-90
-80
-70
-60
-50
-40
-30
-20
-10
0
10
20
30
40
50
60
70
80
90
2
1/2
=116°
0
10
20
30
40
50
60
70
80
90
0
0
-90
-80
-70
-60
-50
-40
-30
-20
-10
-90
-80
-70
-60
-50
-40
-30
-20
-10
2
1/2
=116°
0
10
20
30
40
50
60
70
80
90
0
0
Allegro MicroSystems, Inc.
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
www.allegromicro.com
4
SEPM Series
RGB Multi Chip LED Modules
Forward Current versus Forward Voltage
2 LEDs in Series
Red LEDs
100
Green LEDs
100
100
Blue LEDs
I
f
(mA)
I
f
(mA)
I
f
(mA)
10
6.0
10
5.0
10
3.0
4.0
5.0
6.0
6.5
7.0
7.5
8.0
6.0
7.0
8.0
V
f
(V)
V
f
(V)
V
f
(V)
Luminous Flux versus Forward Current
Red LEDs
2 LEDs in Series
20
18
16
14
12
10
8
6
4
2
0
0
10
20
30
40
50
60
60.0
50.0
Green LEDs
4 LEDs in Series
10.0
8.0
Blue LEDs
2 LEDs in Series
(lm)
0
10
20
30
40
50
60
(lm)
(lm)
40.0
30.0
20.0
10.0
0.0
6.0
4.0
2.0
0.0
0
10
20
30
40
50
60
I
f
(mA)
I
f
(mA)
I
f
(mA)
Allegro MicroSystems, Inc.
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
www.allegromicro.com
5
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