Application Note - LM561B

Application Note
Samsung Electronics
LM561B (5630 G2)
rev1.0
Index
Page
1. Introduction
1.1 Product Description
1.1.1 Essential & Elementary light source (LM561B)
4
1.2 Product Information
1.2.1 Feature and Dimension
5
1.2.2 Product code and binning
6
1.2.3 Spectrum Distribution
9
1.2.4 Polar Intensity Diagram
9
2. Package Characteristics
2.1 Measurement DUT for Package Design Guide
10
2.2 Electrical Characteristics
11
2.3 Optical Characteristics
2.3.1 luminous Flux & Efficacy Ratio vs Current & Ts
12
2.3.2 Color Shift vs. Current & Ts
13
2.3.3 Viewing angle vs. CCT
14
2.4 Mechanical Characteristics
2.4.1 Thermal Resistance
15
2.4.2 Derating Curve
17
2
3. Caution
3.1 Mechanical Considerations
3.1.1 Handling Guide
19
3.1.2 Recommended Land Pattern
20
3.1.3 SMT Set
21
3.1.4 Reflow Profile
22
23
4. Revision History
3
1.1 Product Description
1.1.1 Essential & Elementary light source (LM561B)
LM561B is up-graded basic lighting source from the original LED package LM561A. LM561B can contribute superior performance to illumination
maker. LM561B satisfies global standard package form factor and has high
luminous efficacy and harsh reliability properties.
[ LM561B]
LM561B LED package is adjustable to residential high-end LED-tube, FPL
(Flat Panel LED), Bulb lighting and various non-directional applications.
Traditional
lamp
LED
illumination
Incandescent
Street
MR
PAR
Fluorescent
Bulb Down Light
L-tube
LED Lighting
source
LH351A
LM561B
4
FPL
1.2 Product Information
1.2.1 Feature and Dimension
With global standard package dimension, designer can get superior
performance from LM561B.
- Lead Frame Type LED Package : 5.6 x 3.0 x 0.8t mm
- Four pad’s facilitate self-alignment in SMT process
Anode (+)
LED
Zener
Diode
Cathode (-)
LM561B is very attractive solution for the competitive TCO (total cost of
ownership).
- GaN / Al2O3 Chip & SMD type package
- Eco-friendly : RoHS compliant
Cathode(-)
Anode(+)
0.8
(+)
(+)
0.7
2.34
(-)
0.4
5.0
5.6
Anode mark
[Side View]
[ LM561B Package Dimension ]
5
0.98
[Bottom View]
0.8
[Top View]
1.68
0.25
(-)
2.3
3.0
4.6
0.97
1.01
0.32
Unit : ㎜
Tolerance : ±0.1
1.2 Product Information
1.2.2 Product code and binning
LM561B has full color line-up.
Product Code
CCT [K]
CRI (Min.)
SPMWHT541MD5 WAW0S0
2700
80
SPMWHT541MD5 WAV0S0
3000
80
SPMWHT541MD5 WAU0S0
3500
80
SPMWHT541MD5 WAT0S0
4000
80
SPMWHT541MD5 WAR0S0
5000
80
SPMWHT541MD5 WAQ0S0
5700
80
SPMWHT541MD5 WAP0S0
6500
80
- Color CIE binning is according to ANSI bin and suitable for
lighting application.
- As for 5000K, 5700K, 6500K, 10 sub bins are operated.
As for 2700K, 3000K, 3500K, 4000K, 16 sub bins are operated.
0.45
W
V 2700K
0.43
U
T
0.41
R
Cy
0.39
0.37
0.35
Q
P
3000K
3500K
4000K
Black
Body Locus
ANSI
C78.377A
5000K
5700K
6500K
0.33
0.31
0.29
0.29
6
0.33
0.37
0.41
Cx
0.45
0.49
LM561B has 3 kinds of parameter binning, - Voltage, Flux, Color
- Luminous flux (Iv (Φv)) is divided by 3 rank – S1, S2, S3
@If=65mA
Ts=25℃
33
31
S3
29
27
S2
25
S1
(80Ra)
P0-6500K
(80Ra)
Q0-5700K
(80Ra)
R0-5000K
(80Ra)
T0-4000K
(80Ra)
U0-3500K
(80Ra)
V0-3000K
(80Ra)
23
W0-2700K
Luminous Flux [lm]
Luminous Flux Rank - S1. S2,S3
At the same typical forward voltage, luminous efficacy (lm/W) at each flux
rank can be drawn as below graph.
Luminous Efficacy @65mA
@If=65mA
Ts=25℃
160
150
S3
140
S2
130
S1
120
7
(80Ra)
P0-6500K
(80Ra)
Q0-5700K
(80Ra)
R0-5000K
(80Ra)
T0-4000K
(80Ra)
U0-3500K
(80Ra)
V0-3000K
(80Ra)
110
W0-2700K
Luminous Efficacy [lm/W]
170
2.6
2.7
AZ
2.8
A1
2.9
8
A2
3
A3
3.1
Forward Voltage [V]
(80Ra)
P0-6500K
(80Ra)
Q0-5700K
(80Ra)
R0-5000K
(80Ra)
T0-4000K
(80Ra)
U0-3500K
(80Ra)
V0-3000K
(80Ra)
W0-2700K
Luminous Efficacy [lm/W]
(80Ra)
P0-6500K
(80Ra)
Q0-5700K
(80Ra)
R0-5000K
(80Ra)
T0-4000K
(80Ra)
U0-3500K
(80Ra)
V0-3000K
(80Ra)
W0-2700K
Luminous Efficacy [lm/W]
Luminous Efficacy @100mA
170
@If=100mA
Ts=25℃
160
150
140
S3
130
S2
120
S1
110
Luminous Efficacy @150mA
170
160
@If=150mA
Ts=25℃
150
140
S3
130
S2
120
110
S1
- Forward voltage(VF) is divided to 5 rank - A1,A2,A3,A4,A5
A4
3.2
3.3
1.2 Product Information
1.2.3 Spectrum Distribution
Optical spectra of LM561B are shown as below at each CCT 3000K and
5000K. Measured data is just for representative reference only.
※ CCT: 3000K (X: 0.4350, Y: 0.3995)
※ CCT: 5000K (X: 0.3453, Y: 0.3564)
1.2.4 Polar Intensity Diagram
Viewing angle describes the spatial distribution and the value is 120°(FWHM,
Full width at half maximum), FWHM is the difference between the angles
corresponding to 50% of the maximum intensity.
9
2.1 Measurement DUT for Package Design Guide
CCT 5000K, CRI min. 80
CCT 2700K, CRI min. 80
McPCB
(Metal printed
circuit board)
Thermal resistance :
Thermal resistance :
Thermal resistance :
Thermal resistance :
FR-PCB
(FR4 printed
circuit board)
Ts point
When choosing lighting source, designer
deeply considers basic information of LED
Copper electropackage such as physical dimension,
thermal pad
luminous flux rank, color binning, forward
voltage and thermal properties. Datasheet
of LM561B provides these official data and
information to illumination designer.
Beside datasheet, in this application note, more detail characteristics of
LM561B are presented about electrical, optical, thermal and mechanical point
of view. For this, several measurements are experimented and some graphs
and tables are produced from these real testament. Therefore the purpose of
these data is just for relative reference not official value.
Each 2700K and 5000K CCT of LM561B are mounted on Metal-PCB and FRPCB individually. All data is measured at Ts point which is located on cathode
copper area of PCB. Ts is a temperature of solder point beside package lead.
DUT(Device under Test) is made up like as above picture.
When LED is measured by pulse waves, electrical and optical characteristics
have almost similar outputs in accordance with each color and PCB case(Metal,
FR4). But color coordinate shows different migration from each color CCT.
10
2.2 Electrical Characteristics
160
Forward Current (mA)
If constant current is driven into LED
140
package, forward voltage of the LED
would be dropped as temperature
120
goes up, therefore IV curve would shift
100
left side. In right side graph, IV curve of
25℃
LM561B
is shown at each Ts
50℃
80
temperature.
75℃
Let us consider about power
60
85℃
consumption. From IV curve, power
40
consumption could be represented by
2.7
2.8
2.9
3.0
3.1
3.2
3.3
forward current or forward voltage.
Forward Voltage (V)
Below two graphs show these relations.
[Forward Current vs.
And these graphs show very
Forward Voltage]
meaningful point of driving.
If driving mode is set by constant current mode, the variation of power
consumption becomes more less than constant voltage mode over Ts
temperature .
In order to get stable lighting output, LED should be driven by constant current
driving method.
Forward Current vs.
Power Consumption
Forward Voltage vs.
Power Consumption
3.3
Forward Voltage (V)
Forward Current (mA)
160
140
120
100
25℃
50℃
75℃
85℃
80
60
40
3.2
3.1
3.0
25℃
50℃
75℃
85℃
2.9
2.8
2.7
0.0
0.1
0.2
0.3
0.4
0.5
0.6
Power Consumption (W)
0.0
0.1
0.2
0.3
0.4
0.5
Power Consumption (W)
[Power consumption with
constant current mode]
[Power consumption with
constant voltage mode]
11
0.6
2.3 Optical Characteristics
2.3.1 luminous Flux & Efficacy Ratio vs. Current & Ts
220%
110%
25℃
Relative Efficacy Ratio (%)
210%
200%
190%
180%
170%
Relative Luminous Flux Ratio (%)
160%
150%
140%
50℃
100%
75℃
85℃
90%
80%
70%
40 50 60 70 80 90 100 110 120 130 140 150
130%
Forward Current (mA)
120%
110%
25℃
100%
50℃
[Relative Efficacy Ratio
vs. Forward Current]
75℃
90%
At datasheet, luminous flux of each
rank is presented. In left side graph,
70%
relative luminous flux ratio is presented
depending on each Ts temperature.
60%
Each color CCT has similar flux ratio
50%
between 2700K and 5000K. The
40%
reference point of 100% flux ratio is
40 50 60 70 80 90 100 110 120 130 140 150
when driving current is 65mA, typical
Forward Current (mA)
operating current. Therefore we can
[Relative Luminous Flux Ratio
estimate 180% luminous flux ratio at
vs. Forward Current]
140mA, 85℃ Ts.
Voltage binning is also presented at datasheet. If under the same typical voltage of
2.95V, relative luminous efficacy ratio could be presented like as right side graph. At
60℃ Ts, 100mA, roughly 90% efficacy ratio could be expected.
85℃
80%
12
2.3 Optical Characteristics
2.3.2 Color Shift vs. Current & Ts
0.410
0.44
WG
0.43
0.41
Cy
Black
Body Locus
0.40
Cy
0.42
0.39
0.408
WD
40mA
65mA
100mA
150mA
0.404
W4
W1
0.406
ANSI
C78.377A
0.402
0.452
0.38
0.43 0.44 0.45 0.46 0.47 0.48 0.49
Cx
0.454
0.456
Cx
0.458
0.460
[2700K color shift vs. current & Ts]
At datasheet, the variation of X,Y coordination over current is presented. In this
note, the variation is shown on CIE coordination with current and Ts temperature.
As driving current and Ts temperature increase, each color coordination is shift.
These tendencies are come from the thermal effects of blue chip wavelength and
phosphor.
0.39
0.38
RA
0.37
R6
R9
R4
R5
0.35
0.34
R3
R1
0.33
R7
R2
R8
ANSI
C78.377A
0.32
0.33
Black
Body
Locus
0.34
Cx 0.35
0.36
Cy
Cy
0.36
0.365
0.363
0.361
0.359
0.357
0.355
0.353
0.351
0.349
0.347
0.345
0.340
40mA
65mA
100mA
150mA
0.342
[5000K color shift vs. current & Ts]
13
0.344
Cx
0.346
0.348
2.3 Optical Characteristics
2.3.3 Viewing angle vs. color shift (Cx, Cy)
X-asix
Y-asix
Y-asix
0.06
Cx
0.05
Cy
0.04
0.03
0.02
0.01
0.00
-90 -75 -60 -45 -30 -15 0 15 30 45 60 75 90
Angle (degree)
DCx, DCy (relative to Center)
DCx, DCy (relative to Center)
X-asix
0.06
Cx
0.05
Cy
0.04
0.03
0.02
0.01
0.00
-90-75-60-45-30-15 0 15 30 45 60 75 90
Angle (degree)
[2700K Viewing Angle vs. Color Shift]
0.06
X-asix
Y-asix
0.05
Cx
0.04
Cy
0.03
0.02
0.01
0.00
-90 -75 -60 -45 -30 -15 0 15 30 45 60 75 90
Angle (degree)
DCx, DCy (relative to Center)
DCx, DCy (relative to Center)
X-asix
0.06
Y-asix
0.05
Cx
0.04
Cy
0.03
0.02
0.01
0.00
-90-75-60-45-30-15 0 15 30 45 60 75 90
Angle (degree)
[5000K Viewing Angle vs. Color Shift]
14
2.4 Mechanical Characteristics
2.4.1 Thermal Resistance
[JESD 51-1, 51-14 DUT]
Generally LED generates 2 kinds of major outputs. One is optic light and the
other is heat. This property means that there is some relations between light
output and heat dissipation. Therefore luminous flux, efficacy and color shift
are related with real thermal conditions.
Even though in a same LED packages, the properties of LED could be
different with their thermal resistance. How fast heat dissipate and how much
heat can be accumulated in a system are major design factor in LED
illumination designing.
In this note, the thermal resistance of LM561B is measured according to
JEDEC Standards, JESD51-1, 51-14. We use T3Ster to evaluate thermal
resistance and this is structure functions of LM561B.
15
1000000
K(W2s/K2)
10000
100
5000K_McPCB
2700K_McPCB
5000K_FRPCB
2700K_FRPCB
Ⓓ
Ⓑ
Ⓒ
Ⓐ
Ⓔ
1
0.01
0.0001
1E-06
0
10
20
LED Chip
Chip attach material to substrate
Lead-Frame (substrate)
Molding
Solder to PCB
PCB Solder Pads
PCB Dielectric layer
30
Rth [K/W]
40
50
60
Phosphor
Bonding wire
PLED : Thermal Source
TJ : Junction Temp.
RJ-LF
TLF : Lead Frame substrate
RLF-S
TS : Solder Temp.
RJS : Junction-Solder
RSB : Solder to Board
TB : Board Temp.
Aluminium Plate
Classical TIM to heat-sink
TC : Case Temp.
RBC : Board to Case
Heat Sink
RCA : Case to Air
TA : Ambient Temp.
Tambient : Thermal Ground
We could notice that thermal resistances are different from PCB type.
Thermal resistance of LED Package itself is the sum of Ⓐ + Ⓑ. Then Rth of
junction to solder is the sum of Ⓐ + Ⓑ + Ⓒ, 15℃/W, and LED Package have
similar Rth. But Rth of System is different with PCB type. Rth of Metal PCB is
the sum of Ⓐ + Ⓑ + Ⓒ + Ⓓ, and Rth of FR PCB is the sum of Ⓐ + Ⓑ + Ⓒ + Ⓔ.
CCT 5000K, CRI min. 80
FR-PCB
Rth (Package)
Rth (System)
McPCB
CCT 2700K, CRI min. 80
FR-PCB
McPCB
Ⓐ+Ⓑ+Ⓒ
Ⓐ+Ⓑ+Ⓒ
Ⓐ+Ⓑ+Ⓒ
Ⓐ+Ⓑ+Ⓒ
Ⓐ+Ⓑ+Ⓒ+Ⓔ
Ⓐ+Ⓑ+Ⓒ+Ⓓ
Ⓐ+Ⓑ+Ⓒ+Ⓔ
Ⓐ+Ⓑ+Ⓒ+Ⓓ
16
2.4 Mechanical Characteristics
Forward current [mA]
2.4.2 Derating Curve
200
175
150
Rth(j-a) 50″/W
125
100
Rth(j-a) 100″/W
75
Rth(j-a) 150″/W
50
Rth(j-a) 200″/W
25
0
0
10
20
30
40
50
60
70
80
90
Ambient Temperature [℃]
Max current level should be adopted differently to illumination system. In case of
LH351A, the performance of max current doesn’t equal to every system conditions.
Its performance is closely associated with system thermal resistance that is
effected by total power consumption, ambient temperature and several material
and mechanical aspects. At the worst condition, max current should be prohibited,
more lower level of current should be applied to the LED. Therefore user needs a
certain boundary curve in order to find optimal current level. Usually derating
curve is used for these role and made by a linear function.
in a certain LED module, thermal resistance of system might be equated like as
(A). If thermal resistance(Rj-a), max junction temperature(Tj) and max operating
current(If_max) are known, we can find a linear function(D) – X-axis is ambient
temperature(Ta) and Y-axis is reliable forward current(If).
Rj a 
If 
Tj  Ta
P
Tj  Ta
V f  R j a

Tj  Ta
I f V f

I f V f  R j a  Tf  Ta ------ (B)
------ (A)
Tj
1
Ta 
------ (C)
V f  R j a
V f  R j a
I f  a  Ta  b ------ (D)
17
1
 cons tan t  a
Vf  Rj a
Tj
 cons tan t  b
Vf  Rj a
CASE
IF
[mA]
Module
Circuit
Thermal
System
P [W]
/LED
TJ
[℃]
Ts
[℃]
Ta
[℃]
[℃/W]
①
100
6S*3P
FR-PCB
0.3
115
110
25
300
②
100
6S*3P
McPCB
0.3
70
65
25
150
③
150
6S*3P
McPCB
0.45
92
85
25
150
④
100
6S*6P
McPCB
0.3
95
90
25
240
⑤
150
6S*6P
McPCB
0.45
124
117
25
220
⑥
150
6S*6P
McPCB + H/S
0.45
75
68
25
110
CASE
①
②, ③
④, ⑤
200
⑥
175
6S*3P
6S*3P
6S*6P
6S*6P
IF [mA]
150
Top
view
Rj-a
③⑤⑥
125
100
75
①②④
50
25
Bottom
/ Side
view
0
0 10 20 30 40 50 60 70 80 90
FR-PCB McPCB
McPCB + Heat Sink
Ta[℃]
To understand derating curve, several cases are tested. In case of ①, 18EA of
LM561B are connected as 6 series and 3 parallel and LM561B is driven 100mA
each. Ambient temperature(Ta) and LED solder temperature(Ts) could be
measured. Then LED chip junction temperature(TJ) could be calculated from the
thermal resistance of LM561B and power consumption. From these information,
system thermal resistance becomes 300℃/W and TJ saturated at 115℃ which
temperature slightly over TJ _max 110℃. Even though max current is 150mA, In
this system max current must become 100mA not 150mA. As current increase over
100mA, TJ also increase beyond TJ _max 110℃ and then reliability of LED should be
affected seriously by fatal damage.
If user wants to increase driving current, system thermal resistance should be
lower than before. In metal PCB Case ② ③, as thermal resistance becomes lower
than 150℃/W, TJ also becomes lower than 70℃ and 92℃. Therefore user could
acquire more margin from TJ _max .
18
3.1 Mechanical Considerations
3.1.1 Handling Guide
Please use tweezers to grab LM561B at the base.
Do not touch the silicon mold side with the tweezers or fingers.
Correct Handling
Incorrect Handling
19
3.1 Mechanical Considerations
3.1.2 Recommended Land Pattern
20
3.1 Mechanical Considerations
3.1.3 SMT Set
 Taping
Anode Mark (Cutting)
Start
End
More than 40 mm
Unloaded tape
Mounted with More than 100~200mm
Flash LED
Unloaded tape
Leading part more than
(200~400)mm
(1) Quantity : The quantity/reel to be 2,000 pcs.
(2) Cumulative Tolerance : Cumulative tolerance/10 pitches to be ±0.2㎜
(3) Adhesion Strength of Cover Tape : Adhesion strength to be 0.1-0.7 N when the cover tape is turned off
from the carrier tape at 10℃ angle to be the carrier tape.
(4) Packaging : P/N, Manufacturing data code no. and quantity to be indicated on a damp proof package
21
3.1 Mechanical Considerations
3.1.4 Reflow Profile
 Reflow conditions and work guide
Below reflow profile is recommended for reflow soldering.
Conditions can be changed in various soldering equipment and PCB.
It is recommended that users follow the reflow guide line of a solder
manufacturer
 For Manual Soldering
Not more than 5 seconds @MAX300 ℃, under soldering iron.
22
Writer
Date
Revision History
2013.01.17
New Version
23
Drawn
Approved
Y.J. Lee
D.M. Jeon
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