TI1 LM3447MT A phase-dimmable, primary-side regulated led driver Datasheet

Using the LM3447-A19-120VEVM
User's Guide
Literature Number: SLUU937
May 2012
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WARNING
Always follow TI’s set-up and application instructions, including use of all interface components within their
recommended electrical rated voltage and power limits. Always use electrical safety precautions to help
ensure your personal safety and the safety of those working around you. Contact TI’s Product Information
Center http://support/ti./com for further information.
Save all warnings and instructions for future reference.
Failure to follow warnings and instructions may result in personal injury, property damage, or
death due to electrical shock and/or burn hazards.
The term TI HV EVM refers to an electronic device typically provided as an open framed, unenclosed
printed circuit board assembly. It is intended strictly for use in development laboratory environments,
solely for qualified professional users having training, expertise, and knowledge of electrical safety risks in
development and application of high-voltage electrical circuits. Any other use and/or application are strictly
prohibited by Texas Instruments. If you are not suitably qualified, you should immediately stop from further
use of the HV EVM.
1. Work Area Safety:
(a) Keep work area clean and orderly.
(b) Qualified observer(s) must be present anytime circuits are energized.
(c) Effective barriers and signage must be present in the area where the TI HV EVM and its interface
electronics are energized, indicating operation of accessible high voltages may be present, for the
purpose of protecting inadvertent access.
(d) All interface circuits, power supplies, evaluation modules, instruments, meters, scopes and other
related apparatus used in a development environment exceeding 50 VRMS/75 VDC must be
electrically located within a protected Emergency Power Off (EPO) protected power strip.
(e) Use a stable and non-conductive work surface.
(f) Use adequately insulated clamps and wires to attach measurement probes and instruments. No
freehand testing whenever possible.
2. Electrical Safety:
(a) De-energize the TI HV EVM and all its inputs, outputs, and electrical loads before performing any
electrical or other diagnostic measurements. Revalidate that TI HV EVM power has been safely deenergized.
(b) With the EVM confirmed de-energized, proceed with required electrical circuit configurations, wiring,
measurement equipment hook-ups and other application needs, while still assuming the EVM circuit
and measuring instruments are electrically live.
(c) Once EVM readiness is complete, energize the EVM as intended.
WARNING: while the EVM is energized, never touch the EVM or its electrical circuits as they
could be at high voltages capable of causing electrical shock hazard.
3. Personal Safety:
(a) Wear personal protective equipment e.g. latex gloves and/or safety glasses with side shields or
protect EVM in an adequate lucent plastic box with interlocks from accidental touch.
4. Limitation for Safe Use:
(a) EVMs are not to be used as all or part of a production unit.
2
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User's Guide
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LM3447-A19-120VEVM is a Phase-Dimmable, Primary-Side
Regulated LED Driver
1
Introduction
The LM3447-A19-120VEVM is a 10-W, 120-VAC isolated dimmable LED driver whose form factor intended
for A19/R27 applications.
2
Description
The LM3447-A19-120VEVM is a primary-side power regulated PFC controller used for commercial and
residential phase-cut dimmer compatible LED lamp drivers. The LM3447-A19-120VEVM uses fixed
frequency valley switching operation resulting in discontinuous current operation.
2.1
Typical Applications
•
•
2.2
A19 Bulb Form Factor
R27 Bulb Form Factor
Features
•
•
•
•
•
•
•
•
•
•
•
Primary-Side Control
Leading and Trailing Edge Compatible
50:1 Dimming Range
Valley Switching
Fixed Frequency Discontinuous Operation
Thermal Foldback
PFC
Efficient Triac Hold Current Operation
LED Short and Open Circuit Detection
Thermal Foldback
Constant Power Operation
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Electrical Performance Specifications
3
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Electrical Performance Specifications
Table 1. LM3447-A19-120VEVM Electrical Performance Specifications
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNITS
Input Characteristics
Voltage range
90
Maximum input current
120
135
100
V
mA
Output Characteristics
Output voltage, VOUT
9 to 10 LED’s
Output load current, IOUT
Output current ripple
VIN = 120 VAC
Output over voltage
28
30
32
V
240
275
310
mA
100
mApp
36
V
75
kHz
Systems Characteristics
Switching frequency
Full-load efficiency
VIN = 120 VAC
Power factor, PF
4
82%
0.98
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Driver
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J3
J1
22
R1
Copyright © 2012, Texas Instruments Incorporated
SC1
SC2
SC3
SC4
1 Not
Notes:
populated
0.1uF
118k
C11
R13
C10
0.1uF
3.3mH
L2
R16 1
C4
33nF
C2, C4: 305Vac, X2 class
R1: Fusible Resistor
C2
10nF
3.3mH
R15 1
EMI Filter and Snubber Circuit
L1
Hardware and Fiducials
J5 250VAC, 2A
F1
MOV1
140VAC, 12J
J4
10uF
C12
R12
280k
RT1
100k
C3
0.22uF
R2
470
GND 8
VCC 11
GATE 10
ISNS 9
BIAS 14
HOLD 13
AUX 12
LM3447MT
7 COMP
5 FF
6 INV
3 FTR1
4 FTR2
1 VAC
2 TSNS
U1
LM3447MT
430k
R4
D2
HD04
3.9V
D7
R3
430k
Q1
R8
5.1k
R5
100
450V
UFM15PL-TP
D3
C8
2.2uF, 25V
R14
10
22uF, 25V
C9
D6
D5
BAV19WS-TP BAV19WS-TP
C1
0.1uF
SMAJ160A
160V, 400W
D1
R11
0.2
650V
Q2
10
R7
5
3
4
2
1
10
23.7k
R10
R9
220k
1000pF
C7
6
7
8
9
+
R6
470uF 22k
C5
D4
ES1D-13-F
Wurth Electronics
750813049
T1
LED+
J7
LED-
C6
1uF, 50V
J6
J9
J8
Output: 28V to 32V
4
90VAC
to
135VAC
J2
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Schematic
Schematic
Figure 1. LM3447-A19-120VEVM Schematic
LM3447-A19-120VEVM is a Phase-Dimmable, Primary-Side Regulated LED
Driver
5
Test Setup
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5
Test Setup
5.1
Test Equipment
Voltage Source: 105 VRMS to 135 VRMS isolated AC source PCR500LA (KIKUSUI)
Multimeters: Agilent 34401A
Power Meter: PM1000 Digital Power Meter (Voltech)
Output Load: 9 LEDs in series (VF = 3.2 V at 350 mA per LED)
Oscilloscope: TDS3045C (TEKTRONIX)
Operating Temperature: 25°C
Recommended Wire Gauge: 18 AWG not more than two feet long
5.2
Recommended Test Setup
Figure 2. LM3447-A19-120VEVM Recommended Test Set Up
5.3
List of Test Points
Table 2. Test Points Functions
6
TEST POINTS
NAME
TP1
Neutral
DESCRIPTION
120 VAC neutral connection
TP2
Line
J8
LED+
120 VAC line voltage
LED anode connection
J9
LED-
LED cathode connection
LM3447-A19-120VEVM is a Phase-Dimmable, Primary-Side Regulated LED
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Test Procedure
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6
Test Procedure
6.1
Line/Load Regulation and Efficiency Measurement Procedure
1.
2.
3.
4.
Connect EVM per Figure 2 above. An external LED load must be used to start up the EVM.
Prior to turning on the AC source, set the voltage to 90 VRMS.
Turn on the AC source.
Record the output voltage and current readings from Voltmeter 2 and output current reading from
Ammeter 2 and input voltage reading from Voltmeter 1 and current from Ammeter 1.
5. Increase output voltage by 5 VRMS.
6. Repeat steps 4 and 5 until 135 VAC is reached.
7. Refer to Section 6.2 for shutdown procedure.
6.2
Equipment Shutdown
1. Turn off equipment.
2. Make sure capacitors are discharged.
6.3
EVM Phase Angle Decode vs LED Current
1.
2.
3.
4.
5.
Connect EVM per Figure 2 above. An external LED load must be used to start up the EVM.
Prior to turning on the AC source, set the voltage to 120 VRMS.
Connect scope probe to EVM per Figure 2 above to bridge rectifier output.
Turn on the AC source.
Record the output voltage and current readings from Voltmeter 2 and output current reading from
Ammeter 2 and input voltage reading from Voltmeter 1 and current from Ammeter 1.
6. Set dimmer to minimum setting and vary by 1.0 msec till 8 msec is reached and record in 5 above.
7. Refer to Section 6.2 for shutdown procedure.
NOTE: Scope must be isolated.
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Performance Data and Typical Characteristic Curves
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Performance Data and Typical Characteristic Curves
Figure 3 through Figure 26 present typical performance curves for LM3447-A19-120VEVM.
7.1
Efficiency
Efficiency vs Line Voltage
89.00
Efficiency (%)
87.00
85.00
83.00
81.00
79.00
77.00
75.00
90
100
110
120
130
140
Input voltage (VAC)
Figure 3. LM3447-A19-120VEVM Efficiency
7.2
Power Factor
Input voltage vs. PF
1
Power Factor
0.99
0.98
0.97
0.96
0.95
0.94
0.93
0.92
0.91
0.9
90
100
110
120
130
140
Input voltage (VAC)
Figure 4. LM3447-A19-120VEVM Power Factor vs Line Voltage
8
LM3447-A19-120VEVM is a Phase-Dimmable, Primary-Side Regulated LED
Driver
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7.3
Line Regulation
Line Regulation
15
Input Power (W)
14
13
12
11
10
9
8
7
6
5
90
100
110
120
130
140
Input voltage (VAC)
Figure 5. LM3447-A19-120VEVM Input Power Regulation
Line Regulation
Output current (mA)
325
315
305
295
285
275
265
255
245
235
225
90
100
110
120
130
140
Input voltage (VAC)
Figure 6. LM3447-A19-120VEVM LED Current Regulation
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Performance Data and Typical Characteristic Curves
7.4
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Input Current THD
Ithd% vs. Input voltage
15
14
13
Ithd%)
12
11
10
9
8
7
6
5
90
100
110
120
130
140
Input Voltage (VAC)
Figure 7. LM3447-A19-120VEVM- Ithd % vs Line Voltage
7.5
Output Ripple
Figure 8. Output Ripple
(Ch1 - LED current Ch2 - rectified line voltage Ch4- line current 200 mA/div)
10
LM3447-A19-120VEVM is a Phase-Dimmable, Primary-Side Regulated LED
Driver
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Performance Data and Typical Characteristic Curves
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7.6
Switch Node Voltage Valley Switching
Figure 9. Switch Node Waveform
(Ch1 - LED current Ch2- switch node Ch3 - rectified line voltage)
7.7
Triac Dimmer LED Current vs Conduction Angle
Turn-on angle vs. Iout
300
250
Iout (mA)
200
150
100
50
0
5
25
45
65
85
105
125
145
165
Turn-on angle (degrees)
Figure 10. LED Current vs Conduction Angle
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Performance Data and Typical Characteristic Curves
7.8
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Turn-On Angle vs Input Power
Turn-on angle vs. Total Input Power
Total Input Power (W)
12.00
10.00
8.00
6.00
4.00
2.00
0.00
5
55
105
155
Turn-on angle (degrees)
Figure 11. Turn-On Angle vs. Input Power
7.9
Input/Output Current and Line Voltage Waveforms vs. Dimmer Setting
Figure 12. Dimmer Full
(Ch4- LED current Ch3 - rectified line voltage Ch1 – line current)
12
LM3447-A19-120VEVM is a Phase-Dimmable, Primary-Side Regulated LED
Driver
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Figure 13. Dimmer 8 ms
(Ch4- LED current Ch3 - rectified line voltage Ch1 – line current)
Figure 14. Dimmer 7 ms
(Ch4- LED current Ch3 - rectified line voltage Ch1 – line current)
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Performance Data and Typical Characteristic Curves
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Figure 15. Dimmer 6 ms
(Ch4- LED current Ch3 - rectified line voltage Ch1 – line current)
Figure 16. Dimmer 5 ms
(Ch4- LED current Ch3 - rectified line voltage Ch1 – line current)
14
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Figure 17. Dimmer 4 ms
(Ch4- LED current Ch3 - rectified line voltage Ch1 – line current)
Figure 18. Dimmer 3 ms
(Ch4- LED current Ch3 - rectified line voltage Ch1 – line current)
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Performance Data and Typical Characteristic Curves
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Figure 19. Dimmer 2.0 ms
(Ch4- LED current Ch3 - rectified line voltage Ch1 – line current)
7.10 Current Sense Waveform
Figure 20. Current Sense Waveform
(Ch4- LED current Ch2 - rectified line voltage Ch3 –R11 Current Sense)
16
LM3447-A19-120VEVM is a Phase-Dimmable, Primary-Side Regulated LED
Driver
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7.11 LED Open and Short Circuit Waveforms
Figure 21. Pre-Open Circuit Waveforms
(Ch4- LED current Ch2- LED voltage Ch1 – line current)
Figure 22. Open Circuit Waveforms
(Ch4- LED current Ch2- LED voltage Ch1 – line current)
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Performance Data and Typical Characteristic Curves
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Figure 23. Open Circuit Waveforms
(Ch4- LED current Ch2 - line voltage Ch1 – line current)
Figure 24. Pre-Short Circuit Waveforms
(Ch4- LED current Ch2 - rectified line voltage Ch1 – line current)
18
LM3447-A19-120VEVM is a Phase-Dimmable, Primary-Side Regulated LED
Driver
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Figure 25. Short Circuit Waveforms
(Ch4- LED current Ch2 - rectified line voltage Ch1 – line current)
Figure 26. Short Circuit Waveforms
(Ch4- LED current Ch2- LED voltage Ch1 – line current)
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Performance Data and Typical Characteristic Curves
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7.12 EMI Plot
Figure 27. EMI Plot
20
LM3447-A19-120VEVM is a Phase-Dimmable, Primary-Side Regulated LED
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7.13 Transformer Specification
PRI
127 - 191VDC
70kHz
SEC
30VDC, 280mADC
AUX
15VDC, 20mADC
ELECTRICAL SPECIFICATIONS @ 25°C unless otherwise noted:
D.C. RESISTANCE (@20°C ): -1
3 , 2.90 Ohms ±10%.
5-4 , 0.320 Ohms ±10%.
7-6 , 0.345 Ohms ±10%.
DIELECTRIC RATING: 000VAC,
3 1 minute tested by applying 3750VAC for 1 second between
pins 3-7(tie 1+5).
INDUCTANCE: .30mH ±10%, 70kHz,
1
100mVAC, 0mADC, 3-1, Ls.
SATURATION CURRENT: BDmADC
T
saturating current that causes 20% rolloff from initial inductance.
LEAKAGE INDUCTANCE: 0µH3max., 100kHz, 100mVAC, 3-1(tie 4+5, 6+7), Ls.
TURNS RATIO: 3-1 ):( 5-4 ), ( (8.35 ):(1.00), ±2%.
( 3-1 ):( 7-6 ), ( 4.18 ):(1.00), ±2%.
( 3-2 ):( 2-1 ), ( 1 ):(1.00), ±2%.
OPERATING TEMPERATURE RANGE: -40°C to +125°C includ ing temp rise.
Designed to comply with the following requirements as defined by IEC60950-1, EN60950-1, UL60950-1/CSA60950-1
and AS/NZS60950.1: - Reinforced insulation for a primary circuit at a working voltage of 200VDC.
Wire insulation & RoHS status not affected by wire color. Wire insulation color may vary depending on availability.
WE-Midcom, Inc.
Watertown, SD USA
Toll Free: 800-643-2661
Fax: 605-886-4486
This drawing is dual dimensioned.
Dimensions is brackets are in millimeters
Unless otherwise specified, tolerances are as follows:
Angles: ±1°
Fractions: ±1/64
Decimals:±.005(.127mm)
WE-Midcom, Inc.
Drawing Title rawing Number ev. R
D
Transformer
Revisions: See Sheet 1
Engineer:EJK
750813049
00
Scale ---- pec
S Sheet 1 of 1
03/21/2012
Figure 28. Transformer Specification
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EVM Assembly Drawing and PCB Layout
8
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EVM Assembly Drawing and PCB Layout
The following figures (Figure 29 through Figure 32) show the design of the LM3447EVM-128 printed
circuit board.
Figure 29. LM3447-A19-120VEVM Top Layer Copper (top view)
Figure 30. LM3447-A19-120VEVM Bottom Layer Copper (bottom view)
22
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EVM Assembly Drawing and PCB Layout
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Figure 31. LM3447-A19-120VEVM Top Assembly Drawing (top view)
Figure 32. LM3447-A19-120VEVM Bottom Assembly Drawing (bottom view)
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List of Materials
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List of Materials
The EVM components list according to the schematic shown in Figure 1.
Table 3. LM3447-A19-120VEVM List of Materials
QTY
DESCRIPTION
MFR
PART NUMBER
C10,C11
Capacitor ceramic, 0.1 µF, 16 V, 603
STD
STD
1
C12
Capacitor ceramic, 10 µF, 6.3 V, 805
STD
STD
1
C6
Capacitor ceramic, 1.0 µF, 1210
STD
STD
1
C7
Capacitor, 1000 pF, X1Y1, 250 VAC
TDK
CD85E2GA102MYNS
1
C2
Capacitor film, 10 nF, 310 VAC, X2
Vishay/BC
BFC233820103
1
C5
Capacitor aluminum, 470 µF 50V
Vishay/BC
MAL214651471E3
1
C4
Capacitor, 305 VAC, 33 nF
Epcos
B32921C3333M
1
C1
Capacitor, 0.1 µF, leaded, 305 VAC
Epcos
B32921C3104M189
1
C3
Capacitor, 0.22 µF, 250 V
Vishay
FK20X7R2E224K
1
D2
Bridge rectifier, 400 V, 0.8 A, HD04
Diodes, Inc
HD04
2
D5, D6
Diode, small signal, 250 mA, SOD-323
Micro Commercial
BAV19WS-TP
1
D3
Diode, SMD ultrafast rectifier 1 A, 600 V
Micro Commercial
UFM15PL-TP
1
D4
Diode, super fast rectifier,
Diodes, Inc
ES1D
1
D7
Diode, Zener, 3.9 V, 200 mW, SOD-323
On Semi
MM3Z23V9T1G
1
D1
Diode, SMT TVS 400 W, 160 V
Littlefuse
SMAJ160A
1
F1
Fuse, slow, 250 VAC, 2 A, radial
Bel Fuse inc
RST2
2
L1,L2
Inductor, EMI, 140 mA, 3.3 mH
TDK
TSL0808RA333KR17-P
1
MOV1
MOV, VMAX, 242 VDC, VMIN 198 VDC
Littelfuse Inc
V140LA2P
1
R14
Resistor, chip, 10 Ω, 1/16 W, 603
STD
STD
1
R13
Resistor, chip, 118 kΩ, 1/16 W, 603
STD
STD
1
R9
Resistor, chip, 220 kΩ, 1/16 W, 603
STD
STD
1
R10
Resistor, chip, 23.7 kΩ, 1/16 W, 603
STD
STD
1
R12
Resistor, chip, 280 kΩ, 1/16W, 603
STD
STD
2
R3,R4
Resistor, chip, 430 kΩ, 0.25 W, 1%
Vishay Dale
HVR2500004303F,
R500
1
R1
Resistor, Fusible, 22 Ω, 2 W, 5%
EMC-22RKI
Welwyn
1
R7
Resistor, chip, 10 Ω, 1/10 W, ±5% 805
STD
STD
1
R5
Resistor, chip, 100 Ω, 1/10 W, ±5% 805
STD
STD
1
R8
Resistor, chip, 5.1 kΩ, 1/10 W, ±5% 805
STD
STD
R15,R16
Resistor, chip, 10 kΩ, 1/4 W, ± 5% 1206
STD
STD
1
R6
Resistor, chip, 22 kΩ, 1/4 W, ±5% 1206
STD
STD
1
R11
Resistor, chip, 0.2 Ω, 1/2 W, 1210
Vishay Dale
RCWL1210R200JNE
A
1
R8
Resistor, chip, 470 Ω, 1.5 W, 5%, 2512
Vishay Dale
CRCW2512470RJ,
NEGHP
1
RT1
"Thermistor, NTC, 100 kΩ, 0805
Murata
NCP21WF104J03RA
1
Q2
MOSFET, N-channel, 650 V, 7 A, 600 mΩ, DPAK
ST Micro
STD8N65M5
1
Q1
MOSFET, 450 V, 600 mA, 2 W
ST Micro
STQ3N45K3-AP
1
U1
Dimmable LED Controller TSSOP
TI
LM3447MT
T1
EE16, 1.3 mH, 4.17:1
Wurth
750813049
DNP
24
REFDES
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EVM Warnings and Restrictions
It is important to operate this EVM within the input voltage range of 90 VAC to 135 VAC and the output voltage range of 26 VDC to 34
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During normal operation, some circuit components may have case temperatures greater than 90°C. The EVM is designed to operate
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