Using the LM3447-PAR-230VEVM
User's Guide
Literature Number: SLUUA02
AUGUST 2012
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WARNING
Always follow the TI 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 the TI 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 de-
energized.
(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 Capacitorable of causing electrical shock hazard.
3. Personal Safety:
(a) Wear personal protective equipment (for example. 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) Do not use EVMs as all or part of a production unit.
2SLUUA02–AUGUST 2012
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User's Guide
SLUUA02–AUGUST 2012
LM3447-PAR-230VEVM is a Phase-Dimmable, Primary-
Side Regulated LED Driver
1 Introduction
The LM3447-PAR-230VEVM is a 16-W, 230-VAC isolated dimmable LED driver with form-factors intended
for BR and PAR applications.
2 Description
The LM3447-PAR-230VEVM is a primary-side power regulated PFC controller used for commercial and
residential phase-cut dimmer compatible LED lamp drivers. The LM3447-PAR-230VEVM uses fixed
frequency valley switching operation resulting in discontinuous current operation.
2.1 Typical Applications
• BR Bulb Form Factor
• PAR Bulb Form Factor
2.2 Features
• Primary-Side Control
• Power Factor Correction
• Leading and Trailing Edge Compatible
• 50:1 Dimming Range
• Valley Switching with Fixed Frequency Discontinuous Operation
• Thermal Foldback
• Efficient Triac Hold Current Operation
• LED Short and Open Circuit Protection
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Electrical Performance Specifications
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3 Electrical Performance Specifications
Table 1. LM3447-PAR-230VEVM Electrical Performance Specifications
PARAMETER TEST CONDITIONS MIN TYP MAX UNITS
Input Characteristics
Voltage range 180 230 265 V
Output Characteristics
Output voltage, VOUT 9 to 11 LED’s 30 32 34 V
Output load current, IOUT 500 mA
Output over voltage 38 V
Systems Characteristics
Switching frequency 69 kHz
Full-load efficiency VIN = 230 VAC 85%
Power factor, PF 0.96
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AMP Meter 1
Dimmer
MaxMin
AC Source
LED Load
AMP Meter 2
Volt Meter 1
Test Setup
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5 Test Setup
5.1 Test Equipment
Voltage Source: 180 VRMS to 270 VRMS isolated AC source Agilent 6812B
Multimeters: Agilent 34410A
Power Meter: WT210 Digital Power Meter (Voltech)
Output Load: 10 LEDs in series (VF = 3.2 V at 350 mA per LED)
Oscilloscope: DPO4054 (TEKTRONIX)
Operating Temperature: 25°C
Recommended Wire Gauge: 18 AWG not more than two feet long
5.2 Recommended Test Setup
Figure 2. LM3447-PAR-230VEVM Recommended Test Set Up
5.3 List of Test Points
Table 2. Test Points Functions
TEST POINTS NAME DESCRIPTION
J3-1 Line 230 VAC neutral connection
J3-2 Neutral 230 VAC line voltage
LED+ LED anode connection
LED- LED cathode connection
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Test Procedure
6 Test Procedure
6.1 Line/Load Regulation and Efficiency Measurement Procedure
1. Connect EVM per Figure 2. An external LED load must be used to start up the EVM.
2. Prior to turning on the AC source, set the voltage to 180 VRMS.
3. Turn on the AC source.
4. Record the output voltage from Voltmeter 2 and output current reading from Ammeter 2 and input
current from Ammeter 1.
5. Increase output voltage by 5 VRMS.
6. Repeat steps 4 and 5 until 265 VAC is reached.
7. Refer to Section 6.2 for shutdown procedure.
6.2 Equipment Shutdown
1. Turn off equipment.
2. Make sure Capacitoracitors are discharged.
6.3 EVM Phase Angle Decode vs LED Current
1. Connect EVM per Figure 2. An external LED load must be used to start up the EVM.
2. Prior to turning on the AC source, set the voltage to 230 VRMS.
3. Connect scope probe to EVM per Figure 2 to bridge rectifier output.
4. Turn on the AC source.
5. Record the output voltage from Voltmeter 2 and output current reading from Ammeter 2 and input
current from Ammeter 1.
6. Set dimmer to maximum setting and note the LED current.
7. Varry the dimmer from maximum to minimum setting and evaluate the dimming performance.
8. Refer to Section 6.2 for shutdown procedure.
NOTE: The scope must be isolated.
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EVM Assembly Drawing and PCB Layout
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7 EVM Assembly Drawing and PCB Layout
The following figures (Figure 3 through Figure 6) show the design of the LM3447-PAR-230VEVM printed
circuit board.
Figure 3. LM3447-PAR-230VEVM Top Layer Copper (top view)
Figure 4. LM3447-PAR-230VEVM Bottom Layer Copper (bottom view)
Figure 5. LM3447-PAR-230VEVM Top Assembly Drawing (top view)
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17
17.5
18
18.5
19
19.5
20
20.5
21
180 190 200 210 220 230 240 250 260 270
Input Power (W)
Input Voltage (VRMS)
C007
0.9
0.91
0.92
0.93
0.94
0.95
0.96
0.97
0.98
0.99
180 190 200 210 220 230 240 250 260 270
Power Factor
Input Voltage (VRMS)
C006
80.0%
81.0%
82.0%
83.0%
84.0%
85.0%
86.0%
87.0%
88.0%
89.0%
90.0%
180 190 200 210 220 230 240 250 260 270
Efficiency (%)
Input Voltage (VRMS)
C002
Performance Data and Typical Characteristic Curves
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8 Performance Data and Typical Characteristic Curves
Figure 7 through Figure 30 present typical performance curves for LM3447-PAR-230VEVM.
8.1 Efficiency
Figure 7. LM3447-PAR-230VEVM Efficiency
8.2 Power Factor
Figure 8. LM3447-PAR-230VEVM Power Factor vs Line Voltage
8.3 Line Regulation
Figure 9. LM3447-PAR-230VEVM Input Power Regulation
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0
1
2
3
4
5
6
7
8
9
10
180 190 200 210 220 230 240 250 260 270
Current THD (%)
Input Voltage (VRMS)
C003
400
420
440
460
480
500
520
540
560
580
600
180 190 200 210 220 230 240 250 260 270
LED Current (mA)
Input Voltage (VRMS)
C001
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Performance Data and Typical Characteristic Curves
Figure 10. LM3447-PAR-230VEVM LED Current Regulation
8.4 Input Current THD
Figure 11. LM3447-PAR-230VEVM- Current THD % vs Line Voltage
8.5 Output Ripple
Figure 12. Output Ripple
(Ch1 - rectified line voltage (100V/div); Ch3 - line current (100mA/div); Ch4- LED current (100 mA/div))
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Performance Data and Typical Characteristic Curves
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8.6 Switch Node Voltage Valley Switching
Figure 13. Switch Node Waveform
(Ch1 - switch node (100V/div); Ch2 - rectified line voltage (100V/div))
8.7 Current Sense Waveform
Figure 14. Current Sense Waveform
(Ch1 - switch node voltage (100V/div); Ch2 - R11 current sense (100mV/div))
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Performance Data and Typical Characteristic Curves
8.8 LED Open Circuit Protection
Figure 15. Pre-Open Circuit Waveforms
(Ch1 - LED voltage (10V/div); Ch3 - line current (100mA/div); Ch4 - LED current(200mA/div))
Figure 16. Open Circuit Steady State Waveforms
(Ch1 - LED voltage (10V/div); Ch3 - line current (100mA/div); Ch4 - LED current(200mA/div))
Figure 17. Open Circuit Transient Waveforms
(Ch1 - LED voltage (10V/div); Ch3 - line current (100mA/div); Ch4 - LED current(200mA/div))
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Performance Data and Typical Characteristic Curves
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8.9 LED Short Circuit Protection
Figure 18. Pre-Short Circuit Waveforms
(Ch1 - LED voltage (10V/div); Ch3 - line current (100mA/div); Ch4 - LED current(200mA/div))
Figure 19. Short Circuit Steady State Waveforms
(Ch1 - LED voltage (10V/div); Ch3 - line current (100mA/div); Ch4 - LED current(200mA/div))
Figure 20. Short Circuit Transient Waveforms
(Ch1 - LED voltage (10V/div); Ch3 - line current (100mA/div); Ch4 - LED current(200mA/div))
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0
100
200
300
400
500
600
0.0 50.0 100.0 150.0 200.0 250.0
LED Current (mA)
Input Voltage (VRMS)
C004
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Performance Data and Typical Characteristic Curves
8.10 Dimming Characteristics with Reverse Phase Dimmer
Figure 21. LED Current vs Conduction Angle
Figure 22. Dimmer at maximum brightness setting
(Ch1 - rectified line voltage (100V/div); Ch3 - line current (100mA/div); Ch4- LED current (100 mA/div))
Figure 23. Dimmer at half brightness setting
(Ch1 - rectified line voltage (100V/div); Ch3 - line current (100mA/div); Ch4- LED current (100 mA/div))
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0
100
200
300
400
500
600
0 50 100 150 200 250
LED Current (mA)
Input Voltage (VRMS)
C005
Performance Data and Typical Characteristic Curves
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Figure 24. Dimmer at minimum brightness setting
(Ch1 - rectified line voltage (100V/div); Ch3 - line current (100mA/div); Ch4- LED current (100 mA/div))
8.11 Dimming Characteristics with Forward Phase Dimmer
Figure 25. LED Current vs Input Voltage
Figure 26. Dimmer at maximum brightness setting
(Ch1 - rectified line voltage (100V/div); Ch3 - line current (100mA/div); Ch4- LED current (100 mA/div))
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Performance Data and Typical Characteristic Curves
Figure 27. Dimmer at half brightness setting
(Ch1 - rectified line voltage (100V/div); Ch3 - line current (100mA/div); Ch4- LED current (100 mA/div))
Figure 28. Dimmer at minimum brightness setting
(Ch1 - rectified line voltage (100V/div); Ch3 - line current (100mA/div); Ch4- LED current (100 mA/div))
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At t
1 0 dB
*
*
*
CL R WR
A
6D B
RB W
9 k Hz
VB W
1 0 Hz
SW T
3 4 0 s
TD F
Re f
1 0 0 d B µ V
Ce n t er
2. 1 2 13 2 0 3 4 4 M H z
Sp a n
29 . 8 5 M H z
*
1 A V
SG L
1 M H z
10 M Hz
0
10
20
30
40
50
60
70
80
90
10 0
FC C 1 5Q P K
FC C 1 5A V G
At t
1 0 dB
*
*
*
*
1 P K
MA X H
A
6D B
RB W
9 k Hz
VB W
3 0 kH z
SW T
1 s
*
TD F
Re f
1 0 0 d B µ V
St a r t
15 0 kH z
St o p
30 M Hz
1 M H z
10 M Hz
0
10
20
30
40
50
60
70
80
90
10 0
FC C 1 5Q P K
FC C 1 5A V G
Performance Data and Typical Characteristic Curves
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8.12 EMI Plot
Figure 29. Peak EMI Scan
Figure 30. Average EMI Scan
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Performance Data and Typical Characteristic Curves
8.13 Thermal Performance
Figure 31. LM3447-PAR-230VEVM Thermal Image (top view)
Figure 32. LM3447-PAR-230VEVM Thermal Image (bottom view)
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List of Materials
10 List of Materials
The EVM components list according to the schematic shown in Figure 1.
Table 3. LM3447-PAR-230VEVM List of Materials
QTY REF DES DESCRIPTION MANUFACTURER PARTNUMBER
Phase-dimmable, primary-side power regulated, PFC
1 U1 Texas Instruments LM3447MTE/NOPB
flyback controller for LED Lighting
1 C1 Capacitor, Ceramic, 2200 pF, 250 V, 20%, Radial TDK Corporation CD12-E2GA222MYNS
2 C3, C5 Capacitor, Film, 0.047 µF, 310 VAC, 20%, Radial EPCOS B32921C3473M
1 C4 Capacitor, Film, 0.01 µF, 630 VDC, 20%, Radial Vishay BC Components BFC233820103
2 C6, C9 Capacitor, Ceramic, 0.1 µF, 630 V, ±10%, X7R, Radial TDK Corporation FK22X7R2J104K
1 C7 AP, Aluminum, 680 µF, 50 V, ±20%, Radial Vishay BC Components MAL214651681E3
1 C8 Capacitor, Ceramic, 1 µF, 100 V, ±10%, X7R, 1210 MuRata GRM32CR72A105KA35L
1 C10 Capacitor, Ceramic, 2.2 µF, 16 V, ±10%, X7R, 0805 MuRata GRM21BR71C225KA12L
1 C11 Capacitor, Ceramic, 10uF, 35 V, ±10%, X7R, 1210 MuRata GRM32ER7YA106KA12L
2 C12, C13 Capacitor, Ceramic, 0.1 µF, 16 V, ±10%, X7R, 0603 MuRata GRM188R71C104KA01D
Murata Electronics North
1 C14 Capacitor, Ceramic, 4.7 µF, 16 V, X7R, 10%, 0805 GRM21BR71C475KA73L
America
1 C15 Capacitor, Ceramic, 22 µF, 25 V, ±10%, X7R, 1210 MuRata GRM32ER71E226KE15L
1 D1 Diode, Switching-Bridge, 600 V, 0.8 A, MiniDIP Diodes Inc HD06-T
Vishay General
1 D2 Diode, GPP Ultrafast, 800 V, 1 A, SMA US1K-E3/61T
Semiconductor
1 D3 Diode, Zener, 3.3V, 200 mW, SOD-323 Diodes Inc. MMSZ5226BS-7-F
1 D4 Diode, Superfast, 200 V, 2 A, SMB Diodes Inc ES2D-13-F
2 D5, D6 Diode, Ultrafast, 100 V, 0.25 A, SOD-323 NXP Semiconductor BAS316,115
1 D7 Diode, TVS, Uni, 220 V, 600 W, 5%, SMB Littelfuse Inc SMBJ220A
1 F1 Fuse, Slow, 500 mA, 250 VAC, Radial Bel Fuse Inc RST 500
2 L1, L2 Inductor, 3300 µH, 290 mA, 9.1 Ω(max), Radial Bourns Inc. RLB9012-332KL
1 Q1 MOSFET, N-channel, 800 V, 0.3 A, TO-92 STMicroelectronics STQ1NK80ZR-AP
1 Q2 MOSFET, N-channel, 800 V, 3 A, DPAK STMicroelectronics STD4NK80ZT4
R1, R2, R5,
4 RES, 412 kΩ, 1%, 0.25W, 1206 Vishay-Dale CRCW1206412KFKEA
R10
1 R3 RES, 165 kΩ, 1%, 0.1W, 0603 Vishay-Dale CRCW0603165KFKEA
1 R4 RES, 18 kΩ, 5%, 0.1W, 0603 Vishay-Dale CRCW060318K0JNEA
1 R6 Res, Fusible, 6.8 Ω, x10%, 2W, Axial WELWYN EMC2-6R8K
CRCW25121K00JNEGH
2 R7, R8 RES, 1 kΩ, 5%, 1W, 2512 Vishay Dale P
1 R11 RES, 100 Ω, 1%, 0.125W, 0805 Vishay-Dale CRCW0805100RFKEA
1 R12 RES, 0.18 Ω, 1%, 0.5W, 1210 Rohm MCR25JZHFLR180
1 R13 RES, 10 Ω, 5%, 0.1W, 0603 Vishay-Dale CRCW060310R0JNEA
1 R14 RES, 20 kΩ, 5%, 0.25W, 1206 Vishay-Dale CRCW120620K0JNEA
1 R16 RES, 33 Ω, 5%, 0.125W, 0805 Vishay-Dale CRCW080533R0JNEA
1 R17 RES, 4.7 kΩ, 5%, 0.125W, 0805 Vishay-Dale CRCW08054K70JNEA
1 R18 RES, 143 kΩ, 1%, 0.1W, 0603 Vishay-Dale CRCW0603143KFKEA
1 R19 RES, 280 kΩ, 1%, 0.1W, 0603 Vishay-Dale CRCW0603280KFKEA
1 RT1 Thermistor NTC, 100 kΩ, 5%, 0603 MuRata NCP18WF104J03RB
1 T1 Xfmr, EE20/10/6 Wurth/Midcom 7508151501 Rev 01
1 VR1 Varistor, 275VAC, 369VDC, 23J, 7 mm dia., Radial Littelfuse Inc V275LA4P
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EVM Warnings and Restrictions
It is important to operate this EVM within the input voltage range of 190 V to 265 V and the output voltage range of 26 V to 34 V.
Exceeding the specified input range may cause unexpected operation and/or irreversible damage to the EVM. If there are questions
concerning the input range, please contact a TI field representative prior to connecting the input power.
Applying loads outside of the specified output range may result in unintended operation and/or possible permanent damage to the EVM.
Please consult the EVM User's Guide prior to connecting any load to the EVM output. If there is uncertainty as to the load specification,
please contact a TI field representative.
During normal operation, some circuit components may have case temperatures greater than 90°C. The EVM is designed to operate
properly with certain components above 90°C as long as the input and output ranges are maintained. These components include but are
not limited to linear regulators, switching transistors, pass transistors, and current sense resistors. These types of devices can be identified
using the EVM schematic located in the EVM User's Guide. When placing measurement probes near these devices during operation,
please be aware that these devices may be very warm to the touch.
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