EVBUM2179/D - 1951.0 KB

NCL30083FLYGEVB,
NCL30083BB1GEVB
10 W Passive PFC Flyback
and Buck­Boost Dimmable
LED Driver Evaluation
Board User's Manual
http://onsemi.com
EVAL BOARD USER’S MANUAL
Introduction
This documentation package covers two NCL30083 LED
driver implementations illustrating their use in an E26/E27
based A, PAR and BR LED lamps form factor. The
Electronic Circuit Assembly (ECA) is designed to support
either an isolated flyback or non-isolated buck-boost
configuration. The nominal total power is 10 W for either
application. The selection is controlled through selective
component population of the ECA.
Figure 1. NCL30083FLYGEVB − Flyback
Figure 2. NCL30083BB1GEVB − Buck-Boost
Table 1. DESIGN PARAMETER
Input Voltage
100 – 265 V ac
Line Frequency
50 Hz/60 Hz
Power Factor
> 0.7
Safety (Designed to Meet)
IEC61347-2-13
EU
UL8750
US
Optimized Output Voltage Range
Flyback (NCL30083FLYGEVB)
Buck Boost (NCL30083BB1GEVB)
9.6 – 22.1 V dc
30 – 60 V dc
Output Current
Flyback (NCL30083FLYGEVB)
Buck Boost (NCL30083BB1GEVB)
500 mA dc
195 mA dc
Output Ripple
Flyback (NCL30083FLYGEVB)
Buck Boost (NCL30083BB1GEVB)
200 mA P-P
50 mA P-P
Efficiency
Flyback (NCL30083FLYGEVB)
Buck Boost (NCL30083BB1GEVB)
85%
90%
2 %
Typ.
Start Up Time
 Semiconductor Components Industries, LLC, 2013
May, 2013 − Rev. 1
< 500 msec
1
Typ.
Publication Order Number:
EVBUM2179/D
NCL30083FLYGEVB, NCL30083BB1GEVB
Demo Board Modifications
Since the NCL30082/3 has a wide VCC range this allows
one transformer/inductor design to a > 2:1 change in LED
string forward voltage. If it is desired to reduce the output
current, the output power is no longer the limit, but simply
the level of the reflected voltage from the auxiliary winding
which is monitored by the built in overvoltage protection of
the VCC pin. If a higher output voltage at lower current is
required, the auxiliary winding turns ratio would have to be
modified.
The input capacitor network uses a valley fill PFC to
achieve a power factor of > 0.8 to easily meet ENERGY
STAR input power factor requirements. If compliance
with EN61000-3-2 Class C is required, the input capacitor
network can be easily modified and simplified to one
capacitor, this is discussed in the appendix.
The board as shipped contains the NCL30083 to
demonstrate the line step dimming function which allows
the LEDs to be dimmed in 5 discrete steps by toggling the
AC line (Vin) off momentarily. Cvccbulk holds up VCC while
Vin toggles low switching to the next lower dim level. Since
the timing is user controlled by switching on/off the light
switch the timing window is very wide. Toggling the AC
input in one second is typical. It may take more than
20 seconds of AC off to reset the IC, at which time when
turned on again it return to the 100% state. By removing the
Cvccbulk the step dimming function is effectively disabled so
the performance of the current control is just like the
NCL300082. It is also possible with this board to replace the
NCL30083 with an NCL30082 to evaluate the analog/
dimming control.
The value of Rsense sets the final output current value in
conjunction with Rtrim which is for fine adjustment. The
nature of the primary side loop control makes the current
adjustment somewhat iterative because several circuit
parameters affect the output current setting. It is relatively
easy by changing Rsense to increase the output of the
evaluation board as long as the output power limit is
considered.
Constant Current Control Architecture Introduction
Figure 4 portrays the primary and secondary current of a
fly-back converter in discontinuous conduction mode
(DCM). Figure 3 shows the basic circuit of a fly-back
converter.
Vbulk
Transformer
Lleak
Cclp
Nsp
Rclp
Vout
.
+
Lp
.
Clamping
Network
Clump
DRV
Rsense
Figure 3. Basic Flyback Converter Schematic
N sp ǒV out ) V fǓ
During the on-time of the MOSFET, the bulk voltage Vbulk
is applied to the magnetizing and leakage inductors Lp and
Lleak . The current ramps up.
When the MOSFET is turned-off, the inductor current
first charges Clump . The output diode is off until the voltage
across Lp reverses and reaches:
The output diode current increase is limited by the leakage
inductor. As a consequence, the secondary peak current is
reduced:
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NCL30083FLYGEVB, NCL30083BB1GEVB
I D,pk t
at the auxiliary winding voltage, we can detect the end of the
conduction time of secondary diode. The constant current
control block picks up the leakage inductor current, the end
of conduction of the output rectifier and controls the drain
current to maintain the output current constant. We have:
I L,pk
N sp
The diode current reaches its peak when the leakage inductor
is reset. Thus, in order to accurately regulate the output
current, we need to take into account the leakage inductor
current. This is accomplished by sensing the clamping
network current. Practically, a node of the clamp capacitor
is connected to Rsense instead of the bulk voltage Vbulk . Then,
by monitoring the voltage on the CS pin, we have an image
of the primary current (red curve in Figure 4).
When the diode conducts, the secondary current decreases
linearly from ID,pk to zero. When the diode current has
turned off, the drain voltage begins to oscillate because of
the resonating network formed by the inductors (Lp + Lleak )
and the lump capacitor. This voltage is reflected on the
auxiliary winding wired in fly-back mode. Thus, by looking
I out +
V REF
2N sp R sense
(eq. 1)
The output current value is set by choosing the sense
resistor:
R sense +
V ref
2N sp I out
(eq. 2)
From (eq. 1), the first key point is that the output current
is independent of the inductor value. Moreover, the leakage
inductance does not influence the output current value as the
reset time is taken into account by the controller.
IL,pk
Nsp ID,pk
Ipri(t)
Isec(t)
Time
t1
t2
tdemag
ton
Vaux(t)
Time
Figure 4. Flyback Currents and Auxiliary Winding Voltage in DCM
At this point the Excel spreadsheet based design guide
will help with many of the calculations.
A trim resistor allows for making fine adjustments to the
current limit to set the output current precisely. The LFF
circuit will create some error on the Cs pin which is adjusted
out by proper choice of Rtrim. So we will choose
Rsense = 1.8 W and use Rtrim for the fine adjustments. After
setting R4 to 1.1 kW, Rtrim is 22 W.
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NCL30083FLYGEVB, NCL30083BB1GEVB
SCHEMATIC
Rdamp
180 W
AC_L
F1
D4
FUSE
AC_N
L2
AC1
+
AC2
−
C5
120 nF
400 V
C4
18 mF
200 V
D3
UFM15PL
D2
UFM15PL
MB6S
L1
D1
220 mH
UFM15PL
C2
18 mF
200 V
+HVDC
C3
120 nF
400 V
1.5 mH
Figure 5. Input Circuit
Rclamp (FB Only)
NOTE: Components labeled FB are only populated for the flyback version and components labeled BB are only required
for the Buck-boost configuration
Figure 6. Main Schematic
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NCL30083FLYGEVB, NCL30083BB1GEVB
Table 2. BILL OF MATERIALS
Board Version
Qty
Designator
FB
BB
Part
Manufacturer
Mfr Part Number
Sub
Pb-Free
1
CVccbulk
x*
x*
27 mF
Panasonic
EEU−FC1E270
Yes
Yes
1
CVcc
x
x
4.7 mF
Taiyo Yuden
EMK107ABJ475KA−T
Yes
Yes
1
Cleak
1
Cout
x
2
C2, C4
x
2
C3, C5
2
1
x
4.7 mF
Rubycon
100YXJ4R7M5X11
Yes
Yes
22 mF 16 V
Taiyo Yuden
EMK316BJ226ML−T
Yes
Yes
x
18 mf 200 V
Rubycon
200LLE18MEFC10X12.5
Yes
Yes
x
x
120 nF 400 V
Epcos
B32559C6124+***
Yes
Yes
C10, C11
x
x
1 nF
Kemet
C0402C102K3GACTU
Yes
Yes
C13
x
1000 pF 630 V
Kemet
C0805C102KBRACTU
Yes
Yes
2
C14, C15
x
470 pF 250 VAC Y2
Johanson Dielectric
502R29W471KV3E−****−SC
Yes
Yes
4
D1, D2, D3, Dleak
x
1
Dout
x
1
D4
x
1
D9
1
F1
1
x
UFM15PL
MCC
UFM15PL
Yes
Yes
MURA220T3
On Semiconductor
MURA220T3
No
Yes
x
MB6S
MCC
MB6S
Yes
Yes
x
x
BAS21DW5T1G
ON Semiconductor
BAS21DW5T1G
No
Yes
x
x
FUSE
Littelfuse
0263.500WRT1L
Yes
Yes
L1
x
x
220 mH
Wurth
7447462221
Yes
Yes
1
L2
x
x
1.5 mH
Wurth
7447462152
Yes
Yes
1
Qfet
x
x
NDD02N60Z
ON Semiconductor
NDD02N60Z
No
Yes
1
Rbo
x
x
3.01 MW
Yageo
RC0805FR−073M01L
Yes
Yes
1
Rclamp
x
47 kW
Yaego
RC0805FR−0747K0L
Yes
Yes
1
Rdamp
x
x
180 W
Yaego
RC0805JR−07180RL
Yes
Yes
1
Rgd
x
x
10 W
Yaego
RC0603FR−0710RL
Yes
Yes
1
Rjump1
x*
x*
0W
Yaego
RC0402JR−070RL
Yes
Yes
1
Rtco_trim
x
x
10 kW
Yaego
RC0402FR−0710KL
Yes
Yes
1
R8
x
10 kW
Yaego
RC0402FR−0710KL
Yes
Yes
0
Rjump2
*
−*
10 kW
Yaego
RC0402FR−0710KL
Yes
Yes
1
Rlff
x
x
620 W
Yaego
RC0402FR−07620RL
Yes
Yes
1
Rsens
x
0.68 W
Yaego
RL0603FR−070R68L
Yes
Yes
RL0603FR−070R78L
Yes
Yes
RC0805FR−071ML
Yes
Yes
x
2
0.78 W
Rstart1, Rstart
x
x
1.0 MW
1
Rtco
x
x
100 kW NTC
Epcos
B57331V2104J60
Yes
Yes
1
Rtrim
x
7.15 W
Vishay/Dale
CRCW06037R15FKEA
Yes
Yes
5.1 W
Stackpole
RMCF0603FT5R10
Yes
Yes
x
Yageo
1
Rzcd
x
x
56 kW
Yaego
RC0805FR−0756KL
Yes
Yes
1
R2
x
x
51.1 kW
Yaego
RC0402FR−0751K1L
Yes
Yes
1
R5
x
x
4.7 W
Yaego
RC0805JR−074R7L
Yes
Yes
1
R9
x
100 W
Yaego
RC0805JR−07100RL
Yes
Yes
1
T1
x
XFRM_LINEAR
Wurth
750313435
No
Yes
750313436
No
Yes
x
1
U1
x*
x*
NCL30083
ON Semiconductor
NCL30083BDMR2G
No
Yes
2
Wire , Input, White
x
x
UL1430
Alpha Wire
#24 AWG, Stranded, 6
Yes
Yes
1
Wire, Output, Red
x
x
UL1430
Alpha Wire
#24 AWG, Stranded, 6
Yes
Yes
1
Wire, Output,
Black
x
x
UL1430
Alpha Wire
#24 AWG, Stranded, 6
Yes
Yes
*To convert the board to NCL30082, the identified components are changed, see NCL30082 configuration table.
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NCL30083FLYGEVB, NCL30083BB1GEVB
Table 3. NCL30082 CONFIGURATION TABLE
Topology
Flyback (FB)
Buck Boost (BB)
Notes:
Dimming
Controller
Cvccbulk
Rjump1
Step Dimming
NCL30083
X
X
No DIM Pin Access
NCL30082
Remove
Remove
Access Dimming Pin
NCL30082
Replace with Connector*
Remove
Step Dimming
NCL30083
X
X
No DIM Pin Access
NCL30082
Remove
Remove
Access Dimming Pin
NCL30082
Replace with Connector*
Remove
Connector Assembly
Supplier
Part Number
* Board Connector
Molex
22035025
Mating Connector
Molex
50375023
Connector Terminal
Molex
8701039
GERBER VIEWS
Figure 7. Top Side PCB
Figure 8. Bottom Side PCB
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Rjump2
X
X
NCL30083FLYGEVB, NCL30083BB1GEVB
Figure 9. Top Silkscreen
Figure 10. Bottom Silkscreen
CIRCUIT BOARD FABRICATION NOTES
11. Size tolerance of plated holes: 0.003 in.:
non-plated holes 0.002 in.
12. All holes shall be 0.003 in. of their true position
U.D.S.
13. Construction to be SMOBC, using liquid photo
image (LPI) solder mask in accordance with
IPC−SM−B40C, Type B, Class 2, and be green in
color.
14. Solder mask mis­registration 0.004 in. max.
15. Silkscreen shall be permanent non-conductive
white ink.
16. The fabrication process shall be UL approved and
the PCB shall have a flammability rating of
UL94V0 to be marked on the solder side in
silkscreen with date, manufactures approved logo,
and type designation.
17. Warp and twist of the PCB shall not exceed
0.0075 in. per in.
18. 100% electrical verification required.
19. Surface finish: electroless nickel immersion gold
(ENIG)
20. RoHS compliance required.
1. Fabricate per IPC−6011 and IPC6012. Inspect to
IPA−A−600 Class 2 or updated standard.
2. Printed Circuit Board is defined by files listed in
fileset.
3. Modification to copper within the PCB outline is
not allowed without permission, except where
noted otherwise. The manufacturer may make
adjustments to compensate for manufacturing
process, but the final PCB is required to reflect the
associated gerber file design 0.001 in. for etched
features within the PCB outline.
4. Material in accordance with IPC−4101/21, FR4,
Tg 125C min.
5. Layer to layer registration shall not exceed
0.004 in.
6. External finished copper conductor thickness shall
be 0.0013 in. min.
7. Copper plating thickness for through holes shall be
0.0007 in. min.
8. All holes sizes are finished hole size.
9. Finished PCB thickness 0.031 in.
10. All un­dimensioned holes to be drilled using the
NC drill data.
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NCL30083FLYGEVB, NCL30083BB1GEVB
FLYBACK TRANSFORMER SPECIFICATION
CUSTOMER TERMINAL
RoHS
LEAD(Pb)-FREE
Sn 96%, Ag 4%
Yes
Yes
PART MUST INSERT FULLY TO
SURFACE A IN RECOMMENDED GRID
.530 Max.
[13.46]
DOT LOCATES TERM. #1
.837 Max.
[21.50]
.110 MIN
[2.79]
FL1
.800 Max.
[20.32]
FL2
TERM. NO.’S FOR REF. ONLY
4
PRI
120−375 V
100 kHz
FL1
FL2
LOT CODE & DATE CODE
.600
[15.24]
.047(4)
[1.20]
FL2
SEC
14 V−700 mV
3
750313435
.020 SQ(4)
[.50]
−A−
.200(1)
[5.08]
FL1
.150(2)
[3.81]
1
AUX
16 V−10 mA
RECOMMENDED
P.C. PATTERN, COMPONENT SIDE
2
ELECTRICAL SPECIFICATIONS @ 255C unless otherwise noted:
D.C. RESISTANCE (@ 20C): 1−2 1.25 W 10%.
3−4, 0.695 W 10%.
FL1−FL2, 0.090 W 20%.
DIELECTRIC RATING:
3,000 VAC, 1 minute tested by applying 3,750 VAC for 1 second between pins 4−FL1 (tie 2+3).
500 VAC, 1 minute tested by applying 625 VAC for 1 second between pins 1−4.
INDUCTANCE:
700 mH 10%, 10 kHz, 100 mVAC, 0 mADC, 3−4, Ls.
SATURATION CURRENT:
1 A saturating current that causes 20% rolloff from initial inductance.
LEAKAGE INDUCTANCE
5.0 mH max, 100 kHz, 100 mVAC, 1−2 (tie FL1+FL2), Ls.
15.0 mH max, 100 kHz, 100 mVAC, 3−4 (tie FL1+FL2), Ls.
TURNS RATIO:
(4−3):(1−2), (2.5):(1.00), 1%.
(4−3):(FL1−FL2), (3):(1.00), 1%.
OPERATING TEMPERATURE RANGE: −40C TO 125C including temp. rise.
Unless otherwise specified, tolerances are as follows:
Angles: 1
Fractions: 1/64
This drawing is dual dimensioned. Dimensions in brackets are in millimeters.
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Decimals: 0.005 (.127 mm)
NCL30083FLYGEVB, NCL30083BB1GEVB
BUCK BOOST INDUCTOR SPECIFICATION
CUSTOMER TERMINAL
RoHS
LEAD(Pb)-FREE
Sn 96%, Ag 4%
Yes
Yes
PART MUST INSERT FULLY TO
SURFACE A IN RECOMMENDED GRID
.530 Max.
[13.46]
DOT LOCATES TERM. #1
.837 Max.
[21.50]
.110 MIN
[2.79]
.800 Max.
[20.32]
TERM. NO.’S FOR REF. ONLY
750313436
.020 SQ(4)
[.50]
−A−
LOT CODE & DATE CODE
4
.600
[15.24]
.047(4)
[1.20]
PRI
120−375 V
100 kHz
.200(1)
[5.08]
3
1
.150(2)
[3.81]
AUX
16 V−10 mA
2
RECOMMENDED
P.C. PATTERN, COMPONENT SIDE
ELECTRICAL SPECIFICATIONS @ 255C unless otherwise noted:
D.C. RESISTANCE (@ 20C): 1−2 0.450 W 10%.
3−4, 0.965 W 10%.
DIELECTRIC RATING:
1,000 VAC, 1 minute tested by applying 1,250 VAC for 1 second between pins 1−4.
INDUCTANCE:
950 mH 10%, 10 kHz, 100 mVAC, 0 mADC, 3−4, Ls.
SATURATION CURRENT:
1 A saturating current that causes 20% rolloff from initial inductance.
LEAKAGE INDUCTANCE
25.0 mH max, 100 kHz, 100 mVAC, 3−4 (tie 1+2), Ls.
TURNS RATIO:
(4−3):(1−2), (3):(1.00), 1%.
OPERATING TEMPERATURE RANGE: −40C TO 125C including temp. rise.
Unless otherwise specified, tolerances are as follows:
Angles: 1
Fractions: 1/64
This drawing is dual dimensioned. Dimensions in brackets are in millimeters.
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Decimals: 0.005 (.127 mm)
NCL30083FLYGEVB, NCL30083BB1GEVB
FLYBACK ECA PICTURES
Output Lead Breakout
Cleak − Unstuffed on Flyback
Figure 11. Flyback Top View
Figure 12. Flyback Bottom View
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NCL30083FLYGEVB, NCL30083BB1GEVB
BUCK BOOST ECA PICTURES
Output Lead Breakout
Figure 13. Buck Boost Top View
Parts Unstuffed on Buck Boost
Figure 14. Buck Boost Bottom View
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11
NCL30083FLYGEVB, NCL30083BB1GEVB
Note location of transformer Flying
Leads trim as short as possible.
Mark the Appropriate Configuration
Figure 15. Flyback Lead Breakout
Figure 16. Buck Boost Lead Breakout
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NCL30083FLYGEVB, NCL30083BB1GEVB
TEST PROCEDURE
Equipment Needed

 AC Source – 100 to 265 V ac 50/60 Hz Minimum 1 A

ac capabilities
 AC Wattmeter – 30 W Minimum, True RMS Input



Flyback – 14–17 V dc – 5 LED Load @ 500mA
Buck Boost – 50–55 V dc – 15 LED Load
@ 200 mA
Test Connections
Voltage and Current, Power Factor 0.2% accuracy or
better
DC Voltmeter – 100 V dc minimum 0.1% accuracy or
better
DC Ammeter – 1 A dc minimum 0.1% accuracy or
better
LED Load
1. Connect the Unit Under Test (UUT) per the test set
up in Figure 17.
2. Set the AC source to 120 1 V ac RMS 60 Hz or
230 2 V ac RMS 50 Hz.
NOTE: Unless otherwise specified, all voltage measurements are
taken at the terminals of the UUT.
DC Ammeter
AC Power
Source
AC
Wattmeter
UUT
DC Voltmeter
LED
Test Load
Figure 17. Test Set Up
Functional Test Procedure
Table 4. FLYBACK VERSION (NCL30083FLYGEVB)
Test Limits
Test Condition
Test Variable
Min
Max
Vin = 100 V ac
Output Current
490 mA
510 mA
Vin = 120 V ac
Output Current
490 mA
510 mA
Vin = 265 V ac
Output Current
490 mA
510 mA
Vin = 265 V ac
Power Factor
0.70
Vin = 120 V ac
Vout = 14 V
Efficiency
(Use Actual Measured Data)
82%
Pass/Fail
Table 5. BUCK BOOST VERSION (NCL30083BB1GEVB)
Test Limits
Test Condition
Test Variable
Min
Max
Vin = 100 V ac
Output Current
190 mA
200 mA
Vin = 120 V ac
Output Current
190 mA
200 mA
Vin = 265 V ac
Output Current
190 mA
200 mA
Vin = 265 V ac
Power Factor
0.70
Vin = 120 V ac
Vout = 55 V
Efficiency
(Use Actual Measured Data)
87%
Pass/Fail
Efficiency = ((VOUT  IOUT) / Pin)  100%
Step Dimming Test Procedure
NCL30083BB1GEVB/NCL30083FLYGEVB
4. Interrupting the AC input for 1−2 s will step the
output current down.
5. There 6 discrete current levels. After the lowest
level, the current will return to maximum output.
6. Cycle the input power 6 times validating that the
current steps down at each cycle and returns to
maximum.
1. Connect the UUT to the LED load.
2. Apply 120 V ac power.
3. Verify that the output current is within the
regulation limits as specified in the functional test
procedure.
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NCL30083FLYGEVB, NCL30083BB1GEVB
TEST DATA
510
508
Output Current (mA)
506
504
502
9.6 V LED Vf
500
22.1 V LED Vf
498
496
494
492
490
90
115
140
165
190
215
240
265
Line Voltage (V ac)
Figure 18. Flyback Line & Load Regulation
2.0%
1.5%
Line Regulation
1.0%
0.5%
0.0%
-0.5%
-1.0%
3 LED
6 LED
-1.5%
-2.0%
90
115
140
4 LED
7 LED
165
190
5 LED
215
240
Line Voltage (V ac)
Figure 19. Flyback Relative Line Regulation
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14
265
NCL30083FLYGEVB, NCL30083BB1GEVB
89%
88%
Efficiency
87%
86%
85%
84%
3 LED
6 LED
83%
82%
90
115
4 LED
7 LED
140
165
5 LED
190
215
240
265
Line Voltage (V ac)
Figure 20. Flyback Line & Load Efficiency
0.95
0.90
9.6 V LED Vf
Power Factor
0.85
22.1 V LED Vf
0.80
0.75
0.70
0.65
90
115
140
165
190
215
240
Line Voltage (V ac)
Figure 21. Flyback Line & Load Power Factor
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265
NCL30083FLYGEVB, NCL30083BB1GEVB
0.60
0.58
0.56
Output Current (A)
0.54
0.52
0.50
0.48
0.46
0.44
0.42
0.40
0
2
4
6
8
10
12
14
16
18
20
Time (ms)
Figure 22. Flyback Output Ripple 120 V ac 60 Hz
0.55
0.54
Output Current (A)
0.53
0.52
0.51
0.50
0.49
0.48
0.47
0.46
0.45
0
2
4
6
8
10
12
14
16
Time (ms)
Figure 23. Flyback Output Ripple 230 V ac 50 Hz
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16
18
20
NCL30083FLYGEVB, NCL30083BB1GEVB
200
199
197
196
195
194
193
29V LED Vf
192
60 V LED Vf
191
190
100
120
140
160
180
200
220
240
260
Line Voltage
Figure 24. Buck Boost Line & Load Regulation
93.0%
92.5%
92.0%
Efficiency
Output Current (mA)
198
91.5%
91.0%
90.5%
90.0%
100
120
140
160
180
200
220
240
260
Line Voltage (V ac)
Figure 25. Buck Boost Efficiency over Line (V1 = 55 V/Iout = 195 mA)
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NCL30083FLYGEVB, NCL30083BB1GEVB
0.85
0.84
Power Factor
0.83
0.82
0.81
0.80
0.79
0.78
100
120
140
160
180
200
220
240
260
Line Voltage (V ac)
Figure 26. Buck Boost Power Factor over Line (V1 = 55 V/Iout = 195 mA)
0.210
0.208
0.206
Output Current (A)
0.204
0.202
0.200
0.198
0.196
0.194
0.192
0.190
0.188
0.186
0
2
4
6
8
10
12
14
16
18
Time (ms)
Figure 27. Buck Boost Output Ripple 120 V ac 60 Hz
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20
NCL30083FLYGEVB, NCL30083BB1GEVB
0.210
0.208
Output Current (A)
0.206
0.204
0.202
0.200
0.198
0.196
0.194
0.192
0.190
0
2
4
6
8
10
12
14
16
18
Time (ms)
Figure 28. Buck Boost Output Ripple 230 V ac 50 Hz
Figure 29. Conducted EMI Pre-compliance 150 kHz−2 MHz
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NCL30083FLYGEVB, NCL30083BB1GEVB
Figure 30. Conducted EMI Pre-compliance 150 kHz−30 MHz
APPENDIX
IEC61000−3−2 Class C Compliance
peaks per half period) before or at 65 and does not
stop flowing before 90, where the zero crossing of the
fundamental supply voltage is assumed to be at 0.
Compliance to IEC61000−3−2 Class C (under 25 W) is
not possible with the valley fill front end architecture since
input current does not comply with Class D requirements or
the waveform definition requirements as stated in this
excerpt.
If the discharge lighting equipment has a built-in dimming
device, measurement is made only in the full load condition.
It is possible to comply with the special waveform and
harmonic requirements of the third paragraph with a
standard peak charge front end if the bulk capacitance is
properly sized. The bulk capacitor must be in the range of
200−300 nF/W for a 230 V ac line for Europe. Japan has a
similar requirement; however, the bulk capacitance must be
800–1,200 nF/W because the nominal main is 100 V ac
rather than 230 V ac. The recommended capacitance values
are line specific. So there is no universal mains solution with
a peak charge front end. It is possible to convert the
Evaluation Board from a valley fill to peak charge front end
by deleting, changing, and shorting selected components.
Active Input Power 3 25 W:
Discharge lighting equipment having an active input power
smaller than or equal to 25 W shall comply with one of the
following two sets of requirements:
 The harmonic currents shall not exceed the
power-related limits of Table 6, column 2, or:
 The third harmonic current, expressed as a percentage
of the fundamental current, shall not exceed 86% and
the fifth shall not exceed 61%; moreover, the waveform
of the input current shall be such that it begins to flow
before or at 60, has its last peak (if there are several
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NCL30083FLYGEVB, NCL30083BB1GEVB
Rdamp
Delete D1, D3, & C2
180 W
AC_L
F1
D4
FUSE
AC_N
L2
AC1
+
AC2
−
C5
120 nF
400 V
L1
D1
220 mH
UFM15PL
C4
18 mF
200 V
D2
UFM15PL
D3
UFM15PL
MB6S
1.5 mH
+HVDC
C3
120 nF
400 V
C2
18 mF
200 V
Short D2
Figure 31. Peak Charge Conversion for Evaluation Board
Table 6. BULK CAPACITOR SELECTION TABLE
NOTE:
Line
Minimum Capacitance
Maximum Capacitance
Voltage Rating
230 V ac 50 Hz
2.2 mF
3.3 mF
400 V dc
100 V ac 50/60 Hz
8.2 mF
12 mF
200 V dc
Capacitance values based on 10 W output and selected to the nearest standard value.
To
illustrate
Class
C
performance,
an
NCL30083FLYGEVB was modified and the input valley
fill configuration was modified and the input bulk capacitor
was changed to 2.2 mF, this is the typical performance data.
Typical harmonic content is illustrated in Figure 34. For
applications with 4 LEDs or less, the input capacitor value
should be reduced to meet Class C harmonic content
requirements.
1.5%
Relative Current Regulation
1.0%
0.5%
0.0%
-0.5%
5 LED
-1.0%
6 LED
7 LED
-1.5%
180
190
200
210
220
230
240
250
260
Line Voltage (V ac)
Figure 32. 230 V ac, Class C − Flyback Relative Current Regulation
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270
NCL30083FLYGEVB, NCL30083BB1GEVB
87.0%
86.5%
Efficiency
86.0%
85.5%
85.0%
5 LED
6 LED
7 LED
84.5%
84.0%
180
190
200
210
220
230
240
250
260
270
Line Voltage (Vac)
Figure 33. 230 V ac, Class C − Flyback Line & Load Efficiency
Power Factor
3rd Harmonic
5th Harmonic
5 LED
0.575
81%
52.4%
6 LED
0.587
78%
47.0%
7 LED
0.59
74.6%
40.6%
Class C Limit
−
86%
61%
Figure 34. Class C − Measured Harmonic Content. Vin = 230 V ac, 50 Hz
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