A 25 to 55 V, 0.7 to 1.5 A, Single Stage Power Factor Corrected Constant Current Offline LED Driver with Flexible Dimming Options

AND8470/D
A 25 to 55 V, 0.7 to 1.5 A,
Single Stage Power Factor
Corrected Constant Current
Offline LED Driver with
Flexible Dimming Options
Prepared by: Frank Cathell
APPLICATION NOTE
ON Semiconductor
Introduction
energy savings without compromising safety and
convenience. This is especially useful in outdoor and
underground lighting were bi−level control can reduce the
light level based on time−of−day and occupancy to save
power late at night when there is no activity, but still allows
the light to return to standard light levels in the presence of
activity. In fact the California Lighting Technology recently
published a study where bi−level LED lighting saved 87%
over conventional 70 W HID outdoor pathway bollards.
The
power
supply
is
designed
around
ON Semiconductor’s NCL30001 single stage, continuous
conduction mode (CCM) PFC controller and the NCS1002
secondary side constant voltage, constant current (CVCC)
controller. Details of the operation of the NCL30001 are also
discussed in AND8427 where the power stage design is
discussed for a static (non−dimming) application.
Additional circuitry has been added to the CVCC control
loop to support three types of dimming control: analog
dimming with a 1 to 10 V programming signal; bi−level
dimming with a simple logic level input signal; and PWM
dimming using an onboard 800 Hz oscillator with variable
pulse width. These three dimming functions are
incorporated on an optional plug−in DIM card that can be
wired into the NCL30001LEDGEVB evaluation board. The
demo board already has a standard input which accepts a
user provided logic level PWM input signal which can be
varied from 350 Hz to several kilohertz.
The basic specification of the demo board are listed below.
The maximum output voltage can be adjusted via selection
of a single resistor; and it is compliant enough to handle an
output with a nominal 2:1 forward voltage range. This 2:1
range is dependent on the string series forward voltage and
the drive current. The default output current is set at 1 A, but
a maximum DC output current of 1.5 A is available by
modifying a single resistor value. This power level of this
design is targeted at applications operation below 60 Vdc
maximum and below 100 VA to be under the maximum
power requirements of IEC (EN) 60950−1 (UL1310
Class 2) power supplies. The demo board is illustrative of a
typical operational schematic. If a higher voltage is required
to drive a longer string of LEDs, then several secondary
components would need to be changed and the transformer
design would need to be modified.
This application note describes a 40 to 90 W, off−line,
single stage power factor correction (PFC), isolated constant
current LED driver. There are a wide variety of medium
power lighting applications that would benefit from
replacing the traditional light source with an LED source
including outdoor area lights, parking garages lights, wall
washers, wall packs and architectural lighting. All these
applications have high operating hours, challenging
environmental conditions, and can benefit from advanced
dimming control to further save energy. Moreover many of
these applications have accessibility issues so long lifetime
LED based solutions could significantly reduce
maintenance costs.
This specific driver design is tailored to support LEDs
such as the Cree XLamp™ XP−G and XM, OSRAM
Golden DRAGON LED® Plus, and Philip−Lumileds
Luxeon® Rebel that have maximum drive currents of
700 mA to 1500 mA. These example LEDs exhibit good
efficacy’s at higher drive currents, thus allowing fewer
LEDs to be used to achieve the same light output. For
example, a cool white Cree XP−G driven at 1 A can generate
280 − 320 lm typical at a junction temperature of 80°C with
an efficacy in the range of 100 lm/W. If 14 of these were used
in a wall pack, the source lumen output would be
approximately 4200 lm excluding optical losses and the
typical load power would be ~43 W.
This application note focuses on various options for
dimming including PWM, analog and bi−level dimming.
Intelligent dimming takes full advantage of the instant
turn−on characteristics of LEDs and combines it with
lighting controls to save significant energy without
compromising lighting quality or user safety and comfort. In
many cases, these techniques have not been used in the past
as some traditional large area light sources are difficult to
easily dim and may have long re−strike times. Additionally,
LED lifetime improves when dimmed because the average
operating junction temperature is reduced. PWM and analog
dimming are traditional techniques for dimming. Bi−level or
multi−level dimming involves establishing discrete drive
current steps to support a range of light level. This method
combined with sensors / controls (motion, occupancy, timer
based, or remotely networked control) allows additional
© Semiconductor Components Industries, LLC, 2010
July, 2010 − Rev. 0
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1
Publication Order Number:
AND8470/D
AND8470/D
Specifications
Extended Universal Input:
Frequency
Power Factor:
Harmonic Content
Efficiency
Target
Vmax Range:
Constant Current
Iout Range:
Vout Compliance
Voltage Ripple:
Current Tolerance
Cold Startup
Pout Maximum:
Dimming:
Protection:
90 − 305 Vac (with proper X & Y cap ratings) – to support 277 Vac
47 − 63 Hz
> 0.9 (50−100% of Load)
EN61000−3−2 Class C Compliance
> 85% at 50 −100% of 50 W, Iout = 1 A / Vf = 50 V
UL1310 Class 2 Dry/DA, isolated < 100 VA and < 60 V peak
30 − 55 V (selectable by resistor divider)
0.7 − 1.5 A (selectable by resistor)
>50 to 100% of Vout
< 3 Vpp (dependent on Cout)
$3%
< 1 sec typical to 50% of load
90 W
Two Step Bi−level Analog Dimming
PWM dimming input (350 Hz – 3 kHz) referenced to a secondary side signal ground)
Dimming range > 10:1
1−10 V analog voltage input dimming with a 100k potentiometer, 1 = minimum, 10 V is
100% on
Short Circuit Protection
Open Circuit Protection < 60 V peak
Over Temperature – Latched (optional)
Over Current Protection − Auto recovery (optional)
Over voltage protection – Latched (optional)
Over Temperature Foldback (optional)
Primary Side Circuitry
configuration. Components Q3, Z3, and R4 form a simple
15 V regulator to prevent VCC overvoltage due to the
potentially wide output compliance voltage that is reflected
back to the auxiliary VCC winding when driving LEDs. A
complete description of the primary side circuit operation
can be found in application note AND8397 and will not be
presented here.
The primary side circuit schematic is shown in Figure 1.
The primary circuitry is composed of the NCL30001
derived CCM flyback converter and associated control
logic, input EMI filter, and VCC “housekeeping” circuitry.
It is similar to the primary circuitry shown in Figure 3 of
AND8397 with the exception of the VCC regulator circuit
for the NCL30001 (U1) and a different EMI filter
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AND8470/D
F1
2.5A
L1A
In
C1
C2
0.47
”X”
0.47
”X”
MRA4007T
R1
1M
0.5W
Z1
C3
0.1uF
600V
L1B
R7
R6
365k
365k
D5
R9
R10
R11
30.1k
332k
365k
R2
560k
0.5W
C4
22uF
450V
D10
R5
15
14 NC
C11
4.7uF
25V
6
11
7
10
C12
470pF
C13
33nF
Q1
4.7 ohm
R22
10K
9
11
SPP11N80C3
SFH615A−4
U2
1
4
3
D9
2
R21
R16 TBD MMSD
4148
10K
+
100k
C10
1nF
2.2K
R14
R13
C29
0.1
12
Z2
1
MURS
160T
13
5
8
R15
6
D7
R23
C14 R17
10nF 56k
R18
49.9K
Q2
7.32k
680pF
C9
MMBTA06LT1G
R12
30.1k
R25
20k
8
5
0.1
2
U1
T1
100nF 2
400V
C8
16
3
4
C7
220
NCL30001
C28
1uF
D6
2.2K
MURS
0.5W
160T
Z3
C6
C5
100uF MMSZ5245B 220uF
50V
35v
R8
2K
1/2W
1
R3
36k
3W
MMBTA06LT1G
Q3
R4
C15
C16 C17 C18
0.1
0.1 10nF 1nF
R19
76.8k
AC
D1 − D4
1N5406 x 4
MRA4007T
L2
1.5KE440A
J1
10 ohm
R20
0.10 ohm
0.5W
C27
Notes:
1. Crossed schematic lines are not connected.
2. Heavy lines indicate power traces/planes.
3. Z2/D9 is for optional OVP (not used).
4. L1A/B are Coilcraft PCV−0−224−03L or equivalent.
5. L2 is Coilcraft P3220−AL or equivalent.
6. Q1 and D8 will require small heatsinks.
NCL30001 CVCC, 90 Watt Power Supply
Primary Control Side Schematic (Rev 2)
Figure 1. Primary Converter Circuit
Secondary Side Control Circuitry
lowest output is dominant; hence CVCC control and mode
transition is smooth with no interaction between the
op−amps. Current control is achieved by sensing the output
current through R26 and presenting this sense signal to U3B
where it is compared to a scaled down value of the 2.5 V
internal reference. Figure 2 also shows an interface (P1) to
an optional dimming circuitry card. Details of this will be
discussed in the next section.
Included on the NCL30001EVB board is a PWM input
(J3) that can be connected to an external signal generator. A
high (logic “1”) will switch gating MOSFET Q7 off, so the
default output current is maximum if no PWM signal is
applied. In this mode, the external dimming card is not
required and a jumper should be placed across pins 2 and 3
of P1. It should be noted that the main output terminals to the
LEDs (J2) are “floating” and are not referenced to the logic
common of any low level control or input signals.
Because the right hand side of current sense resistor R26
is connected to the secondary logic ground (or common), the
The schematic of Figure 2 shows the secondary side
circuitry responsible for the CVCC feedback control and the
MOSFET switch (Q7) and associated circuitry that gates the
output current for PWM dimming. Voltage and current
regulation are achieved by utilizing ON Semiconductor’s
NCS1002 secondary side CVCC controller in an SOIC8
package. This chip contains two precision op−amps and an
internal 2.5 V reference. The reference is internally
connected to the non−inverting input of one of the op−amps.
Referring to the schematic of Figure 2, this op−amp is used
for voltage control (U3A). The power supply output is
sensed through resistor divider R34 and R35 and presented
to the inverting input of this op−amp section. The resistors
are selected so as to provide 2.5 V to pin 3 when the output
is at the desired maximum voltage (55 V in this case).
Frequency compensation is provided by R30 and C26.
Since both amplifier outputs are “OR−ed” via diodes D11
and D12 to drive the optocoupler U2, the amplifier with the
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AND8470/D
sense node on the left hand side of the resistor will go
negative with increasing current. The current sense divider
network of R31 and R32 is biased up on the low side of R32
by the 2.5 V reference such that when pin 5 of U3B drops to
zero, this amplifier section becomes dominant and controls
the loop (note that the inverting input is grounded through
signal MOSFET Q5 through R36.)
The output over−current threshold level is set by adjusting
R31 and R32 such that the voltage level presented at pin 5
of U1 at no output load is exactly the voltage drop that will
appear across R26 at maximum load. In this design example
the maximum current is set at 1 A, so there must be 100 mV
of bias at pin 5 under no output load.
The PWM signal from the DIM card is injected into Q6’s
base via R39 on the main board. This signal toggles Q6
which in turn switches Q7, the main output gating MOSFET
on and off. Note that R37 pulls up the gate of Q7 such that
the default position is on, and Q6 must turn on to turn Q7 off.
One of the problems with interrupting the current through
current sense resistor R26 is that current sense amp U3B will
get a changing current sense signal during PWM operation
which will corrupt the desired fixed peak level of the output
current. This is overcome by adding sample and hold
transistor Q5. When Q6 is on and Q7 is off, Q5 is also off and
the current op−amp continues to see the voltage on capacitor
C33 which is exactly what was across R26 when current was
flowing during Q7’s on period. In essence, Q5 and C33 form
a sample and hold circuit which prevents pin 6 of U3B
seeing a switched current level across R26. During the PWM
“off−time” when no current is flowing through R26, the
main inverter is still running and charging output capacitors
C20, 21, and 22. As long as there is sufficient output capacity
and the PWM gating frequency is high enough, the
incremental voltage increase on the output capacitors is
insufficient to cause any significant leading edge current
spiking when Q7 switches back on to provide current to the
LEDs.
Since the VCC to run the secondary side circuitry is
derived from the main output filter capacitors, this voltage
can vary due to series LED diode Vf compliance, and with
the nominal adjusted level of the output voltage. In order to
keep the VCC voltage for U3 and the associated circuitry
stable, a simple linear regulator composed of Q4, Z4, and
R27. This prevents the secondary VCC from exceeding
approximately 15 V.
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AND8470/D
Xfmr
+
1000uF, 63V x 3
8
R24
C19
100, 1/2W
1nF
11
C20
MJD243G
Q4
R28
feedback
optocoupler
2.2k
1
2
R29
C25
43k
0.1
7
MMSD4148
C26
Is
+
1uF
NCS1002
5
1
2.2nF
43k
U3A
4
−
+
2
Vref
R36
C31
Q6
Q5
2N7002KT1G
R41
Vcc
R32
68K
10
R34
R33 82k
6.2k
2.5V
R42
10
C35 C32
0.1
R35
3.9k
10nF
MMBTA06LT1G
R38
100
2.7K
3
internal
to U3
5.1k
Vs
1nF
−
Q7
R37
C33
0.1
MMSD4148
C27
−
LED Cathode
Z5
0.1uF
2.7k
6
C30
D12
0.1
R31
U3B
R30
C34
J2
MMSZ5245B NTD12N10T4G
Current Sense
Sample & Hold
Is
8
D11
2W
R27
PWM Output
Switch
0.1
100V
R26
0.10
4.7K, 0.5W
Vcc = 14V
Z4
MMSZ5245B
To Primary
Ground Plane
0.1
100V
D8
MURH860CTG
U2
C22
C21
LED Anode
C24
C23
10k
R44
10k
R40
10k
6
PWM In
1 kHz
Vcc In
3
GND
Gnd
1 kHz PWM
Out
5
Jumper if DIM
Card not used
R43
10
J3
R39
Vref In
2
Analog
Dim out
1
Common
Dimming
Control
Options
Card
P1
R32 output current setting:
43K for 1.5 A out
68K for 1.0 A out
50V/1.0A LED Driver CVCC Secondary Sensing with
PWM Dimming Input & Option Card (Rev 3A)
Figure 2. Secondary Sensing and PWM Control Schematic
Figure 3 is the schematic of the optional plug−in control
card which supports dimming via three methods. These
include analog dimming using a 1 to 10 V signal adjustable
by a 15 turn potentiometer. An external, remote 100k
potentiometer can be used by removing this potentiometer
and wiring in the remote one with the PCB solder pads
provided. The second dimming option is a bi−level mode
which is typically used with an occupancy sensor, motion
sensor, or microcontroller input to reduce the current level
for reduced light output when there is no activity in an area.
When activity is detected then the driver is switched to the
standard higher drive current level. A simple logic level
signal input is used for this control. The third method is
PWM dimming where the output is switched on and off at
an appropriate frequency by gating output MOSFET Q7.
This dimming technique is preferred when the color point of
the LED needs to be maintained regardless of brightness
level. This is accomplished by modulating the desired peak
LED current between on and off based on duty ratio thus
changing the average LED current. An on−board 800 Hz
oscillator circuit with potentiometer adjustable pulse width
is incorporated on the DIM card to demonstrate this
dimming method.
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AND8470/D
1 kHz
PWM Out
Con1 (to P1)
6
JMP1
P1
20k
R1
U1
4
D2
D1
Vcc
8
3
2
MMSD
4148
0.1
1
C1
68nF
Notes:
1. Pots R1 and R9 are Vishay/Spectrol 43P
type 20 turn cermet trimmers (Mouser
part # 594−43P203 and 594−43P104)
2. All caps are SMD ceramic, 25V min.
3. TH1 is PTC thermistor − LS = 5mm
C3
5
6
Vcc
(source)
C2
0.1
5
Vcc In
Dimming Option Control
Card Schematic (Rev 3)
MC1455D
C4
Vcc
1.0 uF
25V
R16
10k
2N7002KT1G
MMBT2222A
Q2
R2
150k
Q1
D3
R4
R3 10k
20k
MMSD4148
TP1
3
R7
+
_
4.3k
R8
Dim
Select
P1
JMP3
C6
Bi − Level
Switch
10V
1k
Analog
Dimming R9
R6
10nF
5k
U2B
R14
R12
30k
TH1 TBD
10k
Vcc
R13
10k
C8
10nF
1
U2D
C7
0.1
LM324DG
_
_
10
C9
0.1
U2C
TP3
R10
11k
+
2
R15
R11
_
Analog
Dim Out
100k
TP4
Temp
Compensation
JMP2
TP2
Dim
Adj
15k
+
1 − 10V
Analog
C5
1nF
U2A
+
Vref In
(2.5V)
Bi−level
or PWM
R5
Common
Figure 3. Optional DIM Card Schematic
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External
100K Pot
AND8470/D
For analog dimming using the DIM card, P1 should be
jumpered via JMP2. In this case the reference level that
biases up the lower side of R32 on the NCL30001EVB board
is varied by the output signal from U2C on the DIM card. In
this case the 2.5 V reference from the main board is DC
amplified to a 10 V level by U2A on the DIM card and
produces a stable reference for potentiometer R9. Due to the
1 V offset caused by R11, a 1 to 10 V signal is available for
min to max dimming control. This signal is buffered by
follower U2B and then divided again back to the 0 to 2.5 V
level by R12 and R13. The output on U2C now re−injects
this 0 to 2.5 V reference back to the main board to provide
analog dimming capability. In the event that some type of
temperature foldback or compensation is needed, TH1 and
R14 are provided for temperature modification of the
reference signal (normally jumpered out on the demo
board).
For bi−level or PWM dimming, the jumper (JMP3) for P1
must be in the position such that MOSFET switch Q2 on the
DIM card now controls the pin 2 output from the card. For
the bi−level dimming option, no signal into the DIM card
logic input will cause Q1 to be off and Q2 to be on, which
will by pass resistor R2 and the power supply output current
will be maximum. With a logic “1”, Q2 will turn off adding
R2 in series with R32 back on the main board. This will
modify the current amplifier reference to a lower, fixed level
such that the output current will be about 30% of maximum.
For PWM dimming, U1 on the DIM card generates an
800 Hz square wave signal that is PWM adjustable via
potentiometer R1. To activate this oscillator circuit, P1
should be jumpered (via JMP1) and P2 should be jumpered
for the PWM/Bi−Level position (JMP3).
DIMMING OPTIONS CONFIGURATION
Dimming Configuration
External PWM dimming input
Modifications; Jumper Configurations
Omit DIM card; short pins 2 and 3 of connector P1,
Inject PWM signal into J3
On board PWM dimming
Add DIM card with JMP1 added to P1 on DIM card; Add JMP3 to P2 on DIM card. Adjust
pot R1 to vary pulse width
Bi−Level Dimming
Add DIM card with JMP1 (P1) removed; Add JMP3 to P2 on card; Connect switch from TP1 And TP2.
Closed switch gives low dim level.
Analog Dimming, On board
Adjust
Add DIM card with JMP1 (P1) removed: Add
Analog Dimming, Ext.
Potentiometer
Add DIM card with JMP1 (P1) removed. Add
JMP2 to P2; Adjust pot R9 for LED brightness.
JMP2 to P2. Remove pot R9 and wire in external 100k potentiometer to TPs 2, 3 and 4. TP3 is the pot
wiper. Adjust external pot for LED brightness.
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AND8470/D
Test Results and Plots
configuration falls within the 50 V to approximately 20 V
output compliance range of the power supply and provides
typical operational load characteristics for the circuitry.
Data was taken using a string of 1 A white LEDs arranged
for a typical Vf range of series LEDs. This LED
NCL30001 CVCC Power Supply
Output Current vs Vout Compliance
(Iout nominal = 1.00A, Input = 120Vac)
OUTPUT CURRENT
1.2
1.1
1
0.9
0.8
25
35
45
Vout COMPLIANCE VOLTAGE
(Simulated total LED Vf)
55
Figure 4. Current Regulation versus LED String Vf (# of series LEDs); Iout set to 1 A
PWM DIMMING – Minimum Iout and PF vs LED String Vf
NOTE:
# LEDs
String Vf
Duty Ratio
PWM Imin
Power Factor
14
49 Vdc
0.09
90 mA
0.96
11
40 Vdc
0.11
110 mA
0.96
9
31 Vdc
0.15
150 mA
0.95
7
22 Vdc
0.24
240 mA
0.95
Measurements taken at 100 Vac input (worst case), PWM frequency 800 Hz. Imax at 100% Duty Ratio = 1.0 A.
In the case of Analog Dimming as shown in the table
below, when the LED current is reduced, the forward
voltage of the LED drops. The data below represents the
range of dimming achievable with various numbers of series
LEDs.
ANALOG DIMMING (1 – 10 Vdc signal input)
# LEDs
String Vf
Duty Ratio
PWM Imin
Power Factor
14
32 Vdc
0.10
100 mA
0.93
11
27 Vdc
0.14
140 mA
0.93
9
22 Vdc
0.19
190 mA
0.94
7
20 Vdc
0.72
720 mA
0.98
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AND8470/D
Dimming Limitations
voltage the minimum level of current also declines
somewhat in the analog dimming mode.
It is important to note that in this demo board, the
transformer has been optimized to achieve widest range of
operation at maximum load Vf = 55 V/Iout = 1.5 A. To
address a different string length and drive current, the
transformer turns ratio should be optimized for that specific
operating condition or Vf range to achieve the widest range
or analog or dimming performance. Using a transformer
with excessive maximum voltage capability will limit the
lower level of PWM and analog dimming capability as
shown by the table above for low LED string Vf values.
Note that at 100 Vac input, the analog dimming mode is
limited in the minimum amount of current possible as the
LED string Vf becomes lower for the given transformer
design. This is due to depletion of the circuit VCC and
operating voltages necessary for stable circuit operation. It
is important to keep the LED Vf range as closely matched
to the transformer design and its Vout max design parameter
(secondary turns). The PWM dimming minimum level does
not degrade the circuit VCC in the same manner as analog
dimming does when the LED string voltage is lowered for
a given transformer Vf max output design. At increased line
EFFICIENCY AND POWER FACTOR VERSUS DIODE STRING Vf (Measured at Iout = 1 A)
Vf @ 1 A
# LEDs
Efficiency
PF −120 Vac
PF −230 Vac
49 Vdc
14
86.5%
0.99
0.97
40 Vdc
11
86%
0.99
0.97
31 Vdc
9
85.3%
0.99
0.95
22.5 Vdc
7
85%
0.98
0.91
POWER FACTOR VERSUS DUTY RATIO WITH PWM DIMMING MODE (D = 1.0 > 1 A out)
D (PWM)
Iout
120 Vac PF
230 Vac PF
1.0
1.0 A
0.99
0.97
0.75
0.75 A
0.99
0.96
0.50
0.50 A
0.99
0.93
0.25
0.25 A
0.98
0.82
0.10
0.10 A
0.95
0.62
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AND8470/D
In specific regions, electronic lighting components
connected to the AC mains must comply with
IEC61000−3−2 Class C. Below are the test results for this
evaluation board at a 50 W load and a Vin of 230 Vac.
30
Harmonic Current Percentage of Fundametal (%)
Limit (%)
Measured (%)
25
20
15
10
5
0
2
3
5
7
9
11
13
15
17
19
21
23
25
Harmonic
Figure 5. Harmonic Distortion Graph
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27
29
31
33
35
37
39
AND8470/D
WAVEFORMS PLOTS
Figure 6. Output Current Turn−on Profile; 1 A output;
500 mA/Division
Figure 8. Output Current Ripple: 1.5 A Output
(500 mA/division)
Figure 7. Output Current Ripple: 1 A Output
(200 mA/division)
Figure 9. PWM Dimming Current Waveform Plots: D
= 50%; I peak = 1 A
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AND8470/D
Figure 10. PWM Dimming Current: D = 10%; I peak =
1A
Figure 11. AC Input Current: 120 Vac, 48 Vdc, 1 A
Output
Figure 12. AC Input Current: 230 Vac, 48 Vdc, 1 A Output
http://onsemi.com
12
AND8470/D
dBuV
NCL30001 120 Vac
50 Watt LED Load
100
90
80
EN 55022; Class A Conducted, Quasi−Peak
70
EN 55022; Class A Conducted, Average
60
50
40
30
20
10
Average
0
1
10
5/18/2010 9:53:09 AM
(Start = 0.15, Stop = 30.00) MHz
Figure 13. Conducted EMI Plot (50 W Output)
References:
1.
2.
3.
4.
NCL30001 Data Sheet
NCS1002 Data Sheet
California Lighting Technology Center Bi−Level Smart LED Bollard Study
AND8427
http://onsemi.com
13
AND8470/D
MAGNETICS DESIGN DATA SHEET
Project: NCL30001, 90 W, 50 Vout, isolated, single stage PFC LED driver
Part Description: CCM Flyback transformer, 70 kHz, 50 Vout
Schematic ID: T1
Core Type: PQ3230, 3C94 (Ferroxcube) or P material (Mag Inc.)
Core Gap: Gap core for 600 to 650 uH across pins 1 to 2.
Inductance: 625 uH nominal measured across primary (pins 1 to 2)
Bobbin Type: 12 pin pc mount (Mag Inc PC−B3230−12 or equivalent)
Windings (in order): Winding # / type
Turns / Material / Gauge / Insulation Data
Primary A: (1 − 3)
28 turns of #24HN over one layer (no margins). Self−leads
to pins. Insulate for 3 kV to next winding.
50V Secondary (8 − 11)
25 turns of #24HN close wound over one layer and centered
with 2 mm end margins. Insulate with tape for 3 kV to next
winding.
Primary B: (3 − 2)
Same as primary A. Insulate for 1.5 kV to Vcc/Aux.
Vcc/Aux (5 − 6)
13 turns of #24HN spiral wound and centered with 8 mm
end margins. Insulate with tape and terminate
self−leads to pins.
Hipot: 3 kV from primary/Vcc to 50V secondary winding.
Lead Breakout / Pinout
Schematic
(bottom view)
2
7 8 9 10 11 12
28T
Pri B
3
8
25T
Pri A
28T
1
Vcc
5
6
50V sec
11
6 5 4
13T
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14
3 2 1
AND8470/D
BILL OF MATERIALS FOR 50 V, 1 A NCL30001 CVCC LED DRIVER WITH PWM DIMMING
Designator
Substitution
Allowed
Qty
Description
Footprint
Manufacturer
Manufacturer
Part Number
D5,
D10
2
Diode
SMA
ON Semiconductor
MRA4007T
No
D1,
D2,
D3, D4
4
Diode
axial lead
ON Semiconductor
1N5406
No
D6, D7
2
Ultrafast
diode
SMB
ON Semiconductor
MURS160
No
D9, 11,
12, 13
4
Signal diode
SOD123
ON Semiconductor
MMSD4148A
No
D8
1
UFR diode
TO−220ABCT
ON Semiconductor
MURH860CTG
No
Z1
1
TVS
Input
transient
option
axial lead
1.5KE440A
Yes
Z3, 4,
5
3
Zener diode
15 V
SOD123
ON Semiconductor
MMSZ5245B
No
Z2
−
Zener diode
Not Used
(OVP
option)
SOD123
ON Semiconductor
−
No
Q5
1
Mosfet
40 V,
100 mA
SOT23
ON Semiconductor
2N7002KT1G
No
Q7
1
Mosfet
100 V, A
DPak4
ON Semiconductor
NTD12N10T4G
No
Q1
1
Mosfet
11 A,
800 V
TO−220
Infineon
SPP11N80C3
No
Q2,
Q3, Q6
3
BJT
60 V,
500 mA
SOT23
ON Semiconductor
MMBTA06LT1G
No
Q4
1
BJT
100 V, 4 A
DPak4
ON Semiconductor
MJD243G
No
U1
1
PFC
controller
SOIC16
ON Semiconductor
NCL30001
No
U2
1
Optocoupler
4 pin SMD
Vishay
H11A817 or SFH6156A−4
Yes
U3
1
Dual amp +
zener
SOIC−8
ON Semiconductor
NCS1002
No
C1, C2
2
X caps
0.47 mF,
277 Vac
LS = 15mm
Evox Rifa/Kemet or
EPCOS
PHE840MB6470MB16R1
7 or B32922C3474M
Yes
Digikey 495−2322−ND
C27
1
Y2 cap
2.2 nF,
1 kV
LS = 10 mm
Evox Rifa/Kemet
PME271Y422M or
P271HE222M250A
Yes
Digikey 399-5410-ND
C3
1
Polyprop.
Film
0.22 mF
(630 V)
LS =24 mm
Vishay
2222 383 20224
Yes (must
be polyprop)
Digikey P/N BC1858−ND
C7
1
Disc cap
68 to
100 nF,
400 V
LS = 10 mm
TDK
FK22X7R2J104K
high quality
ceramic
Digikey P/N 445−2650−ND
C8, 15,
16, 25,
C26,
C29,
C33
7
ceramic cap
0.1 mF,
50 V
1206
TDK
C3216X7R2A104K
Yes
Mouser P/N 445−1377−1−ND
C23,
C24
2
ceramic cap
0.1 mF,
100 V
1206/1210
TDK
C3216X7R2A104K
Yes
Mouser
C28,
C30
2
ceramic cap
1.0 mF,
25 V
1206
TDK
C3216X7R1H105K
Yes
Mouser P/N
810−C3216X7R1H105K
C19
1
ceramic disc
cap
1 mF, 1 kV
LS = 8 mm
TDK
CK45−B3AD102KYNN
Yes
Mouser
810−CK45−B3AD102KYNN
C12
1
ceramic cap
470 pF,
50 V
1206
Vishay
VJ1206A471JXACW1BC
Yes
Mouser
C9
1
ceramic cap
680 pF,
50 V
1206
Kemet
C1206C681K5GACTU
Yes
Digikey 399−1216−1−ND
C10,
C18,
C31
3
ceramic cap
1 nF,
100 V
1206
Kemet
C1206C102K1RACTU
Yes
Digikey 399−1222−1−ND
C14,
C17,
C32
3
ceramic cap
10 nF,
50 V
1206
TDK
C3216COG2A103J
Yes
Digikey 445−2331−1−ND
C13
1
ceramic cap
33 nF,
50 V
1206
TDK
C3216COG1H333J
Yes
Digikey 445−2699−1−ND
Value
http://onsemi.com
15
Comment
Not Inserted
Not Inserted
AND8470/D
BILL OF MATERIALS FOR 50 V, 1 A NCL30001 CVCC LED DRIVER WITH PWM DIMMING
Manufacturer
Manufacturer
Part Number
Substitution
Allowed
Comment
UCC
ESMG350ELL101MF11D
Yes
Digikey 565−1082−ND
LS = 2.5 mm
UCC
ESMG250ELL4R7ME11D
Yes
Digikey P/N 565−1054−ND
220 mF,
50 V
LS = 5mm
UCC
ESMG500ELL221MJC5S
Yes
Digikey 565−1111−ND
electrolytic
cap
1000 mF,
63 V
LS = 8 mm
Nichicon
647−UVR1J102MHD
Recommend
ed value
Mouser 647−UVR1J102MHD
1
electrolytic
cap
22 mF,
450 V
LS = 5 mm
Nichicon
647−UVY2W220MHD
Yes
Mouser
647−UVY2W220MHD
C34,C
35
2
ceramic cap
0.1 mF,
50 V
1206
TDK
C3216X7R2A104K
Yes
Mouser P/N 445−1377−1−ND
R4
1
0.5 W resistor
2.2k
axial lead
Vishay
NFR25H0002201JR500
Yes
Digikey PPC2.2KBCT−ND
R1
1
0.5 W resistor
1M, 0.5 W
axial lead
Vishay
CMF601M0000FHEK
Yes
Newark
R8
1
0.5 W resistor
2k, 0.5 W
axial lead
Vishay
CMF552K0000FHEB
Yes
Digikey CMF2.00KHFCT−ND
Designator
Qty
Description
Value
Footprint
C5
1
electrolytic
cap
100 mF,
35 V
LS = 2.5 mm
C11
1
electrolytic
cap
4.7 mF,
25 V
C6
1
electrolytic
cap
C20,
21, 22
3
C4
R2
1
0.5 W resistor
560k
axial lead
Vishay
HVR3700005603JR500
Yes
Digiky PPCHJ560KCT−ND
R27
1
0.5 W resistor
4.7k −
5.0k
1210
Vishay
CRCW12104K70JNEA
Yes
Digikey
R24
1
0.5 W resistor
100 W
axial lead
Vishay
CMF50100R00FHEB
Yes
Digikey
R20,
R26
2
0.5 W resistor
0.1 W
LS = 18 mm
Ohmite
WNCR10FET
Yes
Digikey WNCR10FECT−ND
R3
1
3 or 5 W
resistor
36k to 39k
LS = 30 mm
Ohmite
PR03000203602JAC00
Yes
Digikey
PPC36KW−3JCT−ND
R23
1
0.25 W
resistor
4.7 W
1206
Vishay/Dale
CRCW12064R75F
Yes
R5
1
0.25 W
resistor
220 W
1206
Vishay/Dale
CRCW1206220RF
Yes
R38
1
0.25 W
resistor
100 W
1206
Vishay/Dale
CRCW1206100RF
Yes
R21,
41, 42,
43
4
0.25 W
resistor
10 W
1206
Vishay/Dale
CRCW120610R0F
Yes
R15,
R28
2
0.25 W
resistor
2.2k
1206
Vishay/Dale
CRCW12062211F
Yes
R31,
R36
2
0.25 W
resistor
2.7k
1206
Vishay/Dale
CRCW12062741F
Yes
R29,R
30
2
0.25 W
resistor
43.2k
1206
Vishay/Dale
R25
1
0.25 W
resistor
20k
1206
Vishay/Dale
CRCW12062002F
Yes
R32
1
0.25 W
resistor
68k
1206
Vishay/Dale
CRCW12066812F
Yes
R33
1
0.25 W
resistor
6.2k
1206
Vishay/Dale
CRCW12066191F
Yes
R37
1
0.25 W
resistor
5.1k
1206
Vishay/Dale
CRCW12065111F
Yes
R34
1
0.25 W
resistor
82k
1206
Vishay/Dale
CRCW12068252F
Yes
R35
1
0.25 W
resistor
3.9k
1206
Vishay/Dale
CRCW12063921F
Yes
R14,
22, 39,
40
4
0.25 W
resistor
10k
1206
Vishay/Dale
CRCW12061002F
Yes
R13
1
0.25 W
resistor
7.32k
1206
Vishay/Dale
CRCW12064322F
Yes
R9,
R12
2
0.25 W
resistor
30.1k
1206
Vishay/Dale
CRCW12063012F
Yes
R17
1
0.25 W
resistor
56k
1206
Vishay/Dale
CRCW12065622F
Yes
R18
1
0.25 W
resistor
49.9k
1206
Vishay/Dale
CRCW12064992F
Yes
http://onsemi.com
16
Yes
AND8470/D
BILL OF MATERIALS FOR 50 V, 1 A NCL30001 CVCC LED DRIVER WITH PWM DIMMING
Manufacturer
Manufacturer
Part Number
Substitution
Allowed
Vishay/Dale
CRCW12067682F
Yes
1206
Vishay/Dale
CRCW12061003F
Yes
332k
1206
Vishay/Dale
CRCW12063323F
Yes
0.25 W
resistor
365k
1206
Vishay/Dale
CRCW12063653F
Yes
1
Fuse
2.5 A,
250 Vac
TR−5
Littlefuse
37212500411
Yes
L1A/B
2
EMI inductor
220 mH,
2A
Slug core
Coilcraft
PCV−0224−03L
Yes
Toroid
Coilcraft
P3220−AL
Yes
55 V,
90 W
CCM
custom
WE−Midcom (Wurth
Electronics)
750311267, Rev 01
No
Designator
Qty
Description
Value
Footprint
R19
1
0.25 W
resistor
76.8k
1206
R16
1
0.25 W
resistor
100k
R10
1
0.25 W
resistor
R6, 7,
11
3
F1
L2
1
EMI inductor
T1
1
Flyback xfmr
J1, J2,
J3
3
I/O
connectors
LS = 5 mm
Weidmuller
1716020000
Yes
(for
Q1,
D8)
2
Heatsink Q1,
D8
LS = 25.4 mm
Aavid
531102B02500G
(or similar)
Yes
HD1
1
Header
CONN
HEADER
2POS
0.100”
Molex
90120−0122
Yes
JMP1
1
Shorting
Jumper
0.1” Two
Position
Shorting
Jumper
0.100”
Sullins Connector
Solutions
SPC02SYAN
Yes
Comment
Digikey WK4258BK−ND
Digikey 281−1435−ND
OPTIONAL DIM DAUGHTER CARD BOM
Footprint
Manufacturer
Manufacturer Part Number
Substitution Allowed
SOD123
ON Semiconductor
MMSD4148A
No
400 mA,
40 V
SOT23
ON Semiconductor
MMBT2222A
No
Mosfet
40 V,
100 mA
SOT23
ON Semiconductor
2N7002KT1G
No
1
Timer IC
_
SOIC8
ON Semiconductor
MC1455D
No
1
Quad Opamp
_
SOIC14
ON Semiconductor
LM324DG
No
C4
1
ceramic cap
1.0 mF,
25 V
1206
TDK
C3216X7R1H105K
Yes
Mouser
810−C3216X7R1H105K
C1
1
ceramic cap
68 nF,
50 V
1206
Vishay
VJ1206Y683KXAA
Yes
Mouser 77−VJ12Y50V683K
C2, 3,
7, 9
4
ceramic cap
0.1 mF,
50 V
1206
TDK
C3216X7R2A104K
Yes
Mouser
810−C3216X7R2A104K
C6, C8
2
ceramic cap
10 nF,
50 V
1206
TDK
C3216COG2A103J
Yes
C5
1
ceramic cap
1 nF,
100 V
1206
Kemet
C1206C102K1RACTU
Yes
R1
1
potentiometer
20k,
15 Turn
Thru hole
Vishay
T18203KT10
Yes
Mouser 72−T18−20K
R9
1
potentiometer
100k,
15 turn
Thru hole
Vishay
T18104KT10
Yes
Mouser 72−T18−100K
R4, 11,
13, 16
4
0.25 W
resistor
10k
1206
Vishay/Dale
CRCW12061002F
Yes
R2
1
0.25 W
resistor
150k
1206
Vishay/Dale
CRCW12061503F
Yes
R3
1
0.25 W
resistor
20k
1206
Vishay/Dale
CRCW12062002F
Yes
R5
1
0.25 W
resistor
4.3k
1206
Vishay/Dale
CRCW12064321F
Yes
Designator
Qty
Description
D1,
D2, D3
3
Signal diode
Q1
1
BJT
Q2
1
U1
U2
Value
http://onsemi.com
17
Comment
AND8470/D
OPTIONAL DIM DAUGHTER CARD BOM
Manufacturer
Manufacturer Part Number
Substitution Allowed
Vishay/Dale
CRCW12064991F
Yes
1206
Vishay/Dale
CRCW12061001F
Yes
15k
1206
Vishay/Dale
CRCW12061502F
Yes
0.25 W
resistor
11k
1206
Vishay/Dale
CRCW12061102F
Yes
1
0.25 W
resistor
30k
1206
Vishay/Dale
CRCW12063012F
Yes
R15
1
0.25 W
resistor
10 W
1206
Vishay/Dale
CRCW120610R0F
Yes
R14
1
0.25 W
resistor
0W
1206
Vishay/Dale
CRCW12060000Z
Yes
TH1
1
PTC
Thermistor
Not Used
Thru hole
CON 1
1
right angle
pins
0.1” 6
position
Thru hole
Designator
Qty
Description
Value
Footprint
R6
1
0.25 W
resistor
5k
1206
R7
1
0.25 W
resistor
1.0k
R8
1
0.25 W
resistor
R10
1
R12
Yes
Molex or Tyco
Rt angle 6 pin connector,
0.1” pitch
http://onsemi.com
18
Yes
Comment
AND8470/D
Golden DRAGON LED is a registered trademark of OSRAM Opto Semiconductors, Inc.
LUXEON is a registered trademark of Philips Lumileds Lighting Company and Royal Philips Electronics of the Netherlands.
XLamp is a trademark of Cree, Inc.
ON Semiconductor and
are registered trademarks of Semiconductor Components Industries, LLC (SCILLC). SCILLC reserves the right to make changes without further notice
to any products herein. SCILLC makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does SCILLC assume any liability
arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation special, consequential or incidental damages.
“Typical” parameters which may be provided in SCILLC data sheets and/or specifications can and do vary in different applications and actual performance may vary over time. All
operating parameters, including “Typicals” must be validated for each customer application by customer’s technical experts. SCILLC does not convey any license under its patent
rights nor the rights of others. SCILLC products are not designed, intended, or authorized for use as components in systems intended for surgical implant into the body, or other
applications intended to support or sustain life, or for any other application in which the failure of the SCILLC product could create a situation where personal injury or death may occur.
Should Buyer purchase or use SCILLC products for any such unintended or unauthorized application, Buyer shall indemnify and hold SCILLC and its officers, employees, subsidiaries,
affiliates, and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of personal injury
or death associated with such unintended or unauthorized use, even if such claim alleges that SCILLC was negligent regarding the design or manufacture of the part. SCILLC is an
Equal Opportunity/Affirmative Action Employer. This literature is subject to all applicable copyright laws and is not for resale in any manner.
PUBLICATION ORDERING INFORMATION
LITERATURE FULFILLMENT:
Literature Distribution Center for ON Semiconductor
P.O. Box 5163, Denver, Colorado 80217 USA
Phone: 303−675−2175 or 800−344−3860 Toll Free USA/Canada
Fax: 303−675−2176 or 800−344−3867 Toll Free USA/Canada
Email: [email protected]
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Europe, Middle East and Africa Technical Support:
Phone: 421 33 790 2910
Japan Customer Focus Center
Phone: 81−3−5773−3850
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19
ON Semiconductor Website: www.onsemi.com
Order Literature: http://www.onsemi.com/orderlit
For additional information, please contact your local
Sales Representative
AND8470/D
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