1
Application Note 1854
ISL1903DEMO1Z: Offline Triac Dimmable LED Driver
Introduction
ISL1903DEMO1Z evaluation board converts a low line AC input
voltage (120V) to a 42V, 350mA constant current output to
drive LEDs. It is implemented with Intersil’s critical conduction
mode (CrCM) single ended buck controller, the ISL1903. It
demonstrates fundamental functions of the ISL1903,
including soft-start, triac dimming, overvoltage protection,
short circuit protection, etc. The circuit operates in CrCM with
variable frequency and allows for near zero-voltage switching
(ZVS). Typical efficiency is about 87% at full load. This
application note covers the test setup, performance data,
dimming data, schematics, layout and BOM.
Design Specifications
•Input voltage V
IN: 96V to 144V
•Output voltage V
O: 28V to 42V
• Output current IO: 350mA (14W)
• Board dimensions: 55×26×15mm3 (L×W×H)
• Input power factor greater than 0.95
• Total harmonic distortion less than 15%
• Peak efficiency at full load: 87%
• 0-100% dimming with leading and trailing edge dimmers
FIGURE 1. AC BUCK CONVERTER APPLICATION SCHEMATIC
ISL1903
CS+
DHC
OFFREF PWMOUT
VREF
OUT
VDD
OC OVP
1
2
4
3
5
6
7
8
AC
IOUT
RAMP
9
10
11
12
13
14
15
16
GND
FB
DELADJ VERR
Aux
D4
Vdrain
Vdrain
NC
C3
T1
Q1
LED Load
R1b
C2
R3
R11
Q2
R9
R8
D1a
C12 C13
R52
R1d R19
C6
R13
R16
R20
C5 C17 R15
R14
D2
C1
R29
R12
D12 R5
R30
C18
C1a
R1a
C9
C7
L2
L3
R27
R25
F1
RV1
LINE
NEUTRAL
D1
LED +
LED -
~
~
+
_
NC
R53
LED Driver with Triac Dimming
120V AC, 60Hz
42V, 350mA
R10
C19
R1e
C4
R1c
acp
acp
ISL1903DEMO1Z Rev A
630V
4700pF, 5%
250V, 2.5A
0O
2512
275V, 23J
V275LA4P
10mH
10mH
10K
0805
10K
0805
305V
680nF, 20%
250V
330nF, 10%
680O
2512 600V, 1A
MB6S
400V
47nF, 10%
510K
0805
510K
0805
100O
axial
2SK3471
13V
Zener
BAV70
70V, 0.2A
10O
0805
21.5K
0603
21.5K
0603
21.5K
0603
1.58K
0603
1.58K
0603
MCL4448 499O
0603 0.22O
1206
10O
0805
400V, 5.4A
TK8P25DA or
STD7NK40ZT4
220uH
2.3:1 (Pri:Aux)
200V, 3A
STTH2R02A-T
50V
1uF, 10%
50V
270uF, 20%
16V
0.47uF, 10%
3K
0603
50V
100pF, 5%
50V
1000pF, 5%
43K
0603
4.99K
0603
510K
0603
16V
100nF, 10%
16V
100nF, 10%
25V
33uF, 20%
25V
33uF, 20%
100K
0603
100O
0805
DNP
50V
10pF, 10%
300K
1206
FIGURE 2. TEST SETUP WITH AND WITHOUT DIMMING
LED Driver
NEUTRAL
LINE
AC LINE LED
LOAD
LED +
LED -
ISL1903DEMO1Z Rev A
Vin Vout
LED Driver
Dimmer
NEUTRAL
LINE
AC LINE LED
LOAD
LED +
LED -
Vin Vout
ISL1903DEMO1Z Rev A
June 14, 2013
AN1854.0
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 1-888-468-3774 |Copyright Intersil Americas LLC 2013. All Rights Reserved
Intersil (and design) is a trademark owned by Intersil Corporation or one of its subsidiaries.
All other trademarks mentioned are the property of their respective owners.
Application Note 1854
2AN1854.0
June 14, 2013
Schematic Description
The ISL1903 is a high-performance, critical conduction mode
(CrCM), single-ended buck LED driver controller. It supports
single-stage conversion of the AC mains to a constant current
source with power factor correction (PFC). It also may be used
with DC input converters. The ISL1903 supports buck converter
topologies, such as isolated forward converters or non-isolated
source return buck converters. Operation in CrCM allows near
zero-voltage switching (ZVS) for improved efficiency while
maximizing magnetic core utilization. The ISL1903 LED driver
provides all of the features required for high-performance
dimmable LED ballast designs.
Input EMI Filtering
Inductors L2, L3 and capacitors C7, C9 filter the switching
current to the AC line. Resistors R25, R27 dampen the resonance
of the EMI filter, preventing peaks in the conducted EMI
spectrum.
MOV RV1 clamps the maximum line voltages during line surge
events. Bridge rectifier D1 rectifies the AC line voltage. Fuse F1
provides overload protection from the AC mains.
Start-up Network
R8, R53, R9, Q2 and D2 constitute the linear regulator circuit
which is used during startup. Once the energy is built and voltage
is generated on the aux winding, the linear regulator circuit is
disabled and the auxiliary winding supplies the VDD and current
to the IC.
Power Stage
Q1, D4, T1 (coupled inductor) and C3 are the AC buck converter
components. The source of the main MOSFET Q1 is tied to
ground and a high voltage level shifter is not needed as is the
case in a buck converter.
Near zero voltage switching (ZVS) or quasi-resonant switching, as
it is sometimes referred to, can be achieved in the buck topology
by delaying the next switching cycle after the inductor current
decays to zero (critical conduction mode). The delay allows the
inductance and parasitic capacitance to oscillate, causing the
switching FET drain-source voltage to ring down to minima. If the
FET is turned on at this minima, the capacitive switching losses
are greatly reduced.
Inductance Calculation
Inductance value is important in operating the buck converter in
critical conduction mode. The desired inductance is calculated
using Equation 1:
where VOUT is the LED string voltage, VIN is the rms input voltage,
IOUT is the current through the LED string and fmin is the chosen
minimum frequency at minimum VIN. Plugging in the values
from Table 1 into Equation 1 provides:
The above equation calculates the required inductance when
operating at the DC equivalent input voltage. It does not take into
account the reduction in conduction angle that occurs when the
instantaneous input voltage is less the output voltage.
Equation 3 corrects for this.
220µH inductor is selected for this application.
The auxiliary winding is used to detect inductor zero-current for
critical conduction mode operation. R29, R12 and D12 scale
down the sensed zero crossing voltage and applied to the IC.
Deladj sets delay before a new switching cycles starts. This
adjustment allows the user to delay the next switching cycle until
the switching FET drain-source voltage reaches a minimum value
to allow quasi-ZVS (Zero Voltage Switching) operation. Resistor
R16 to ground programs the delay.
FIGURE 3. TOP/BOTTOM VIEW OF THE EVALUATION BOARD
1
2
---CV2


TABLE 1. BUCK CONVERTER ELECTRICAL PARAMETERS
NAME VALUE
VINmin(rms) 96V
VINmax(rms) 144V
VOUT 42V
IOUT 350mA
Fmin(avg) 90kHz
LVOUT VIN rms
VOUT
–
2f
min
IOUT VIN rms2
-------------------------------------------------------------------------------------H=(EQ. 1)
(EQ. 2)
L42 96 42–
290k0.35 96 2
---------------------------------------------------------------- H265H==
Lbuck L
2arc VOUT
VIN 2
-----------------------



sin–
------------------------------------------------------------------
H=(EQ. 3)
Lbuck 265H
2asin42
96 2
--------------------


–
--------------------------------------------------------- 239H==
Application Note 1854
3AN1854.0
June 14, 2013
Performance Data
TABLE 2. PERFORMANCE DATA- 14 LED LOAD
VIN
(V)
PIN
(W)
VO
(V)
IO
(mA)
PO
(W)
PF
(V/V)
THD
(%)
η
(%)
90 15.79 40.89 332.79 13.61 0.983 16.32 86.20
100 15.61 40.88 331.10 13.54 0.985 13.62 86.72
110 15.55 40.88 330.53 13.51 0.986 11.68 86.92
120 15.58 40.88 330.63 13.52 0.98 10.17 86.77
130 15.60 40.88 331.16 13.54 0.98 9.12 86.76
140 15.67 40.88 332.00 13.57 0.98 8.35 86.60
TABLE 3. PERFORMANCE DATA - 12 LED LOAD
VIN
(V)
PIN
(W)
VO
(V)
IO
(mA)
PO
(W)
PF
(V/V)
THD
(%)
η
(%)
90 13.67 35.30 333.84 11.79 0.99 12.69 86.24
100 13.59 35.29 332.8 11.75 0.99 10.87 86.42
110 13.58 35.28 332.55 11.73 0.99 9.63 86.39
120 13.59 35.27 332.90 11.74 0.98 8.77 86.40
130 13.64 35.26 333.62 11.77 0.98 8.60 86.24
140 13.75 35.26 334.54 11.8 0.97 8.38 85.80
TABLE 4. PERFORMANCE DATA - 10 LED LOAD
VIN
(V)
PIN
(W)
VO
(V)
IO
(mA)
PO
(W)
PF
(V/V)
THD
(%)
η
(%)
90 11.44 29.43 332.90 9.8 0.99 9.8 85.61
100 11.40 29.43 332.50 9.78 0.99 9.10 85.81
110 11.42 29.42 332.64 9.79 0.98 8.98 85.68
120 11.46 29.42 333.24 9.8 0.98 9.10 85.54
130 11.52 29.42 334.15 9.83 0.97 9.38 85.35
140 11.61 29.42 335.26 9.86 0.96 9.41 84.97
Performance Curves
FIGURE 4. POWER FACTOR vs LINE VOLTAGE FIGURE 5. THD WITH LINE VARIATION
FIGURE 6. EFFICIENCY vs LINE VOLTAGE FIGURE 7. OUTPUT CURRENT VARIATION WITH LINE
90
92
94
96
98
100
90 100 110 120 130 140
POWER FACTOR (V/V) (%)
LINE VOLTAGE (V)
14 LEDs
12 LEDs
10 LEDs
0
5
10
15
20
25
30
90 100 110 120 130 140
THD (%)
LINE VOLTAGE (V)
14 LEDs
12 LEDs 10 LEDs
80
81
82
83
84
85
86
87
88
89
90
90 100 110 120 130 140
EFFICIENCY (%)
LINE VOLTAGE (V)
12 LEDs
14 LEDs
10 LEDs
Application Note 1854
4AN1854.0
June 14, 2013
Key Waveforms
FIGURE 8. INPUT VOLTAGE AND CURRENT WAVEFORMS WITH
NO DIMMER CONNECTED; TRACE 3: INPUT VOLTAGE
(70V/DIV); TRACE 4: INPUT CURRENT (100mA/DIV)
FIGURE 9. INPUT VOLTAGE AND CURRENT DURING STARTUP;
TRACE 3: INPUT VOLTAGE (70V/DIV); TRACE 4: INPUT
CURRENT (100mA/DIV)
FIGURE 10. OUTPUT VOLTAGE AND CURRENT DURING STARTUP;
TRACE 3: OUTPUT VOLTAGE (8V/DIV); TRACE 4:
OUTPUT CURRENT (100mA/DIV)
FIGURE 11. OUTPUT VOLTAGE AND CURRENT; TRACE 3: OUTPUT
VOLTAGE (8V/DIV); TRACE 4: OUTPUT CURRENT
(100mA/DIV)
INPUT
INPUT
CURRENT
WAVEFORMS DEPICTING INPUT VOLTAGE AND CURRENT
VOLTAGE
INPUT VOLTAGE AND CURRENT DURING STARTUP
INPUT CURRENT
INPUT VOLTAGE
OUTPUT VOLTAGE
LED CURRENT
OUTPUT VOLTAGE AND CURRENT DURING STARTUP
OUTPUT VOLTAGE
LED CURRENT
LED CURRENT RIPPLE
Application Note 1854
5AN1854.0
June 14, 2013
Dimming Compatibility
The requirement to provide dimming with low cost, triac based
dimmers introduced trade-offs in the design. Due to lower power
consumption by LED lighting, the input current drawn by the
lamp during triac based dimming is below the holding current of
triac dimmers. This causes the triac to trigger inconsistently and
causes flickering and/or limited dimming range. Large
impedance presented to the line by the LED driver allows
significant ringing to occur due to inrush current charging the
input capacitance when triac turns on. This can cause
undesirable operation as the ringing may cause the triac current
to fall to zero and turn off prematurely.
To overcome these issues, an active dimmer current holding
circuit (DHC pin, R17) and a passive damping circuit (C1a, R1a)
are incorporated into the design. These circuits result in
increased power dissipation and hence reduce electrical
efficiency and overall lamp efficacy. For non-dimming
applications, these circuits can be omitted.
ISL1903EVAL1Z evaluation board has been tested against the
following common dimmers available in the market.
1. Leviton 6602-1W
2. Leviton Truetouch TT106-1
3. Lutron DVCL-153P
4. Luton CTCL-153P
5. Leviton Decora slide dimmer
6. Lutron Skylar S-600
FIGURE 12. TRACE 1: DRAIN VOLTAGE (70V/DIV); TRACE 2: GATE
VOLTAGE (9V/DIV); TRACE 3: RECTIFIED AC VOLTAGE
(80V/DIV); TRACE 4: OUTPUT CURRENT (300mA/DIV)
FIGURE 13. TRACE 1: DRAIN VOLTAGE (60V/DIV); TRACE 2: GATE
VOLTAGE (7V/DIV)
Key Waveforms (Continued)
DRAIN
GATE
SWITCHING WAVEFORMS
RECTIFIED AC
LED CURRENT
DRAIN
GATE
ZERO-VOLTAGE SWITCHING
TABLE 5. DIMMING DATA
CONDUCTION
ANGLE
(%)
OUTPUT
CURRENT
(mA)
% OF OUTPUT
CURRENT
MEASURED
(%)
% OF OUTPUT
CURRENT AS
PERCEIVED BY
HUMAN EYE
(%)
100 348 100.0 100.0
90 348 100.0 100.0
85.2 348 100.0 100.0
80.62 348 100.0 100.0
64.2 247 70.98 84.25
50.4 158 45.4 67.38
39.12 106 30.46 55.19
32.16 75 21.55 46.42
26.16 46 13.22 36.36
13.44 7.7 2.21 14.87
12 1.6 0.46 6.78
8.4 0 0 0
0000
Application Note 1854
6AN1854.0
June 14, 2013
Dimming Curve
FIGURE 14. DIMMING CURVE - LEADING EDGE DIMMER
0
50
100
150
200
250
300
350
400
0102030405060708090100
OUTPUT CURRENT (mA)
CONDUCTION ANGLE (%)
Dimming Waveforms
FIGURE 15. TRACE 3: INPUT VOLTAGE (100V/DIV);
TRACE 4: INPUT CURRENT (100mA/DIV)
FIGURE 16. TRACE 3: INPUT VOLTAGE (100V/DIV);
TRACE 4: INPUT CURRENT (100mA/DIV)
INPUT VOLT AGE
INPUT
WAVEFORM SHOWING LINE VOLTAGE AND CURRENT;
CONDUCTION ANGLE: 85.2%
CURRENT
INPUT VOLTAG E
INPUT CURRENT
CONDUCTION ANGLE: 57.2%
WAVEFORM SHOWING LINE VOLTAGE AND CURRENT;
Application Note 1854
7AN1854.0
June 14, 2013
FIGURE 17. TRACE 3: INPUT VOLTAGE (100V/DIV);
TRACE 4: INPUT CURRENT (100mA/DIV)
FIGURE 18. TRACE 3: INPUT VOLTAGE (100V/DIV);
TRACE 4: INPUT CURRENT (100mA/DIV)
FIGURE 19. TRACE 3: INPUT VOLTAGE (100V/DIV); TRACE 4: INPUT CURRENT (100mA/DIV)
Dimming Waveforms (Continued)
INPUT VOLTAGE
INPUT CURRENT
CONDUCTION ANGLE: 34.09%
WAVEFORM SHOWING LINE VOLTAGE AND CURRENT;
INPUT VOLTAGE
INPUT CURRENT
CONDUCTION ANGLE: 21.6%
WAVEFORM SHOWING LINE VOLTAGE AND CURRENT;
INPUT VOLTAGE
INPUT CURRENT
WA V EFORM SHOWING LINE VOLTAGE AND CURRENT;
CONDUCTION ANGLE: 12.96%
Application Note 1854
8AN1854.0
June 14, 2013
Overvoltage Protection
Short Circuit Protection
FIGURE 20. TRACE 1: VDD (9V/DIV); TRACE 2: OVP (500mV/DIV);
TRACE 4: LED CURRENT (200mA/DIV)
FIGURE 21. TRACE 1: VDD (9V/DIV); TRACE 2: OVP (500mV/DIV);
TRACE 4: LED CURRENT (80mA/DIV)
FIGURE 22. TRACE 1: VDD (8V/DIV); TRACE 3: OUTPUT VOLTAGE
(20V/DIV); TRACE 4: LED CURRENT (800mA/DIV)
VDD
OVP
OUTPUT CURRENT
OVP - NORMAL OPERATION
VDD
OUTPUT CURRENT
OVP - NO LOAD CONDITION
OVP
VDD VOLTAGE
OUTPUT CURREN T
OUTPUT VOLTAGE
Application Note 1854
9AN1854.0
June 14, 2013
EMI Results - Cispr 22 Class B
FIGURE 23. LINE AT 120V, 60Hz
FIGURE 24. NEUTRAL AT 120V, 60Hz
QUASI PEAK
AVERAGE
QUASI PEAK
AVERAGE
TABLE 6. QUASI PEAK AND AVERAGE READINGS
FREQUENCY (MHz) LEVEL (dBµV) AC LINE
CLASS B
DETECTOR (QP/AVG)LIMIT MARGIN
0.175 53.5 Line 1 64.7 -11.2 QP
0.175 52.9 Neutral 64.7 -11.8 QP
0.183 51.8 Neutral 64.3 -12.5 QP
0.185 51.6 Line 1 64.3 -12.7 QP
0.175 39.4 Line 1 54.7 -15.3 AVG
0.175 38.7 Neutral 54.7 -16.0 AVG
0.213 46.9 Neutral 63.1 -16.2 QP
0.183 37.5 Neutral 54.3 -16.8 AVG
0.541 37.5 Line 1 56.0 -18.5 QP
0.185 35.4 Line 1 54.3 -18.9 AVG
0.635 35.7 Line 1 56.0 -20.3 QP
0.541 21.1 Line 1 46.0 -24.9 AVG
0.635 20.8 Line 1 46.0 -25.2 AVG
0.213 24.5 Neutral 53.1 -28.6 AVG
27.809 20.4 Neutral 50.0 -29.6 AVG
27.840 18.7 Line 1 50.0 -31.3 AVG
27.809 28.4 Neutral 60.0 -31.6 QP
27.840 26.9 Line 1 60.0 -33.1 QP
Application Note 1854
10 AN1854.0
June 14, 2013
Temperature Mapping The following pictures show the temperature of ISL1903 evaluation board.
Operating conditions: VIN = 120V, TA = +25°C, VOUT = 42V, IOUT = 350mA
FIGURE 25. TOP SIDE TEMPERATURE SNAPSHOT DURING 100%
CONDUCTION AND FULL LOADING
FIGURE 26. BOTTOM SIDE TEMPERATURE SNAPSHOT DURING 100%
CONDUCTION AND FULL LOADING
Application Note 1854
11 AN1854.0
June 14, 2013
Application Schematic
ISL1903
CS+
DHC
OFFREF PWMOUT
VREF
OUT
VDD
OC OVP
1
2
4
3
5
6
7
8
AC
IOUT
RAMP
9
10
11
12
13
14
15
16
GND
FB
DELADJ VERR
Aux
D4
Vdrain
Vdrain
NC
C3
T1
Q1
LED Load
R1b
C2
R3
R11
Q2
R9
R8
D1a
C12 C13
R52
R1d R19
C6
R13
R16
R20
C5 C17 R15
R14
D2
C1
R29
R12
D12 R5
R30
C18
C1a
R1a
C9
C7
L2
L3
R27
R25
F1
RV1
LINE
NEUTRAL
D1
LED +
LED -
~
~
+
_
NC
R53
LED Driver with Triac Dimming
120V AC, 60Hz
42V, 350mA
R10
C19
R1e
C4
R1c
acp
acp
ISL1903DEMO1Z Rev A
630V
4700pF , 5%
250V, 2.5A
0O
2512
275V, 23J
V275LA4P
10mH
10mH
10K
0805
10K
0805
305V
680nF, 20%
250V
330nF, 10%
680O
2512 600V, 1A
MB6S
400V
47nF, 10%
510K
0805
510K
0805
100O
axial
2SK3471
13V
Zener
BAV70
70V, 0.2A
10O
0805
21.5K
0603
21.5K
0603
21.5K
0603
1.58K
0603
1.58K
0603
MCL4448 499O
0603 0.22O
1206
10O
0805
400V, 5.4A
TK8P25DA or
STD7NK40ZT4
220uH
2.3:1 (Pri:Aux)
200V, 3A
STTH2R02A-T
50V
1uF, 10%
50V
270uF, 20%
16V
0.47uF, 10%
3K
0603
50V
100pF, 5%
50V
1000pF , 5%
43K
0603
4.99K
0603
510K
0603
16V
100nF, 10%
16V
100nF, 10%
25V
33uF, 20%
25V
33uF, 20%
100K
0603
100O
0805
DNP
50V
10pF, 10%
300K
1206
Application Note 1854
12 AN1854.0
June 14, 2013
Bill of Materials
TABLE 7. BOM FOR ISL1903DEMO1Z REV. A
QTY REFERENCE DESIGNATOR TYPE/MOUNT/PACKAGE/VOL/TOL/MAT MANUFACTURER MANUFACTURER PART #
1 C1 Cap, Radial, 47n, 400V, 10%, FILM PANASONIC ECQE4473KF
1 C1a Cap, TH, 330n, 250V, 20%, MKT EPCOS B32529C3334K000
1 C9 Cap, Radial, 0.033µ, 305V, 20%, MKT EPCOS B32921C3333M
1 C2 Cap, SM, 0603, 470n, 16V, 10%, X7R TDK C1608X7R1C474K
2 C4, C6 Cap, SM, 0603, 0.1µ, 16V, 10%, X7R MURATA GRM39X7R104K016AD
1 C5 Cap, SM, 0603, 1000p, 50V, 5%, C0G MURATA GRM1885C1H102JA01D
1 C17 Cap, SM, 0603, 100p, 50V, 5%, C0G PANASONIC ECJ-1VC1H101J
1 C18 Cap, SM, 0603, 10p, 50V, 5%, C0G YAGEO CC0603JRNP09BN100
2 C12, C13 Cap, SM, 1206, 33µ, 25V, 20%, X5R TDK C3216X5R1E336M
1 C7 Cap, RADIAL, 10X4mm, 4700p, 630V, 5%, FILM KEMET R76PD1470SE40J
1 C3 Cap, RADIAL, 10x20, 270µ, 50V, 20%, ALUM PANASONICEEU-FM1H271
1 C19 Cap, SM, 0805, 1µ, 50V, 10%, X7R Murata GRM21BR71H105KA12L
1 D1a Diode, SM, SOT23, 150mA, 75V, Switching MICRO COM BAV70-TP
1 D1 Diode, SMD, $P 4.2X4.9, 600V, 0.5A, Rectifier MICRO COM MB6S-TP
1 D2 Diode, SMD, SOD-123, 13V, 500mW, zener FAIRCHILD MMSZ5243B
1 D12 Diode, SMD, MICROMELF, 100V, 200mA, Small signal VISHAY MCL4448-TR
1 D4 Diode, SM, SMA, 200V, 2A, Fast Recovery STM STTH2R02A
1 T1 Coupled Inductor, SM,220µH Renco RLIN1000
2 L2, L3 Inductor, Radial, 10mH Renco RL-5480-3-10000
1 F1 Fuse, Radial, 250V, 2.5A Bel Fuse RST 2.5
1 U1 IC, ISL1903 16Pin, QSOP INTERSIL ISL1903FAZ
1 Q1 MOSFET, SM, DPAK, 250V, 7.5A Toshiba/STM TK8P25DA/STD7NK40ZT4
2 Q2 MOSFET, SM, SOT89, 500V, 0.5A Toshiba 2SK3471
1 R1a Res, SM, 2512, 680, 1%, Thick Film VISHAY CRCW2512680RFKEG
1 R1b Res, SM, 1206, 300k, 1%, Thick Film YAGEO RC1206FR-07300KL
1 R1c Res, SM, 0603, 0, 1%, Thick Film DNP DNP
2 R1d, R15 Res, SM, 0603, 100k, 1%, Thick Film VENKEL CR0603-10W-1003FT
1 R3 Res, SM, 0603, 3k, 1%, Thick Film YAGEO RC0603FR-073KL
1 R5 Res, SM, 1206, 0.22, 1%, Thick Film PANASONIC ERJ-8RQFR22V
1 R8, R53 Res, SM, 1206, 510k, 1%, Thick Film VENKEL CR1206-4W-5103FT
1 R9 Res, SM, 1206, 200, 1%, Thick Film
Res, TH, 200, 1% - substitution for SM
YAGEO MFR-25FBF-100R
2 R10, R11 Res, SM, 0805, 10, 1%, Thick Film VENKEL CR0805-8W-10R0FT
1 R12 Res, SM, 0603, 1.58k, 1%, Thick Film VENKEL CR0603-10W-1581FT
1 R13 Res, SM, 0603, 43k, 1%, Thick Film VENKEL C0603-10W-4302FT
1 R14 Res, SM, 0603, 1.2Meg, 1%, Thick Film PANASONIC ERJ-3EKF1204V
2 R16, R29 Res, SM, 0603, 21.5k, 1%, Thick Film VENKEL CR0603-10W-2152FT
1 R1e Res, SM, 2512, 0, 1%, Thick Film VENKEL CR2512-1W-000T
1 R19 Res, SM, 0603, 510k, 1% ,Thick Film PANASONIC ERJ-3EKF5103V
1 R20 Res, SM, 0603, 4.99k, 1%, Thick Film PANASONIC ERJ-3EKF4991V
2 R25, R27 Res, SM, 1206, 10k, 1%, Thick Film VENKEL CR1206-4W-1002FT
1 R30 Res, SM, 0603, 499, 1%, Thick Film VENKEL CR0603-10W-4990FT
1 R52 Res, SM, 0603, 100, 1%, Thick Film VENKELCR0603-10W-1000FT
1 RV1 Varistor, Radial, 7mm, 275V, 23J, 1.2kA, TVS LITTLEFUSEV275LA4P
Application Note 1854
13
Intersil Corporation reserves the right to make changes in circuit design, software and/or specifications at any time without notice. Accordingly, the reader is
cautioned to verify that the Application Note or Technical Brief is current before proceeding.
For information regarding Intersil Corporation and its products, see www.intersil.com
AN1854.0
June 14, 2013
Assembly Drawing
FIGURE 27. SILKSCREEN TOP
FIGURE 28. SILKSCREEN BOTTOM
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