Linear Technology DC1745A Quick setup guide

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DEMO MANUAL DC1745A
Description
LT3748
100V Isolated Flyback Converter
Demonstration circuit 1745A is an isolated flyback con-
verter featuring the LT3748 controller for high input voltage
applications. It is designed for a 15V output at up to 3A
from a 100V to 400V DC input. The part senses the iso-
lated output voltage from the third winding of the flyback
transformer during the off time of the power switch. No
opto-coupler or signal transformer is required for regula-
tion. A minimum load of approximately 150mA is required
on the output of the circuit to maintain regulation.
Optionally, the demo circuit can be powered from a uni-
versal offline input (85V~265V, 50/60Hz) using the AC
input terminals. Provisions for an EMI filter and surge
protection are provided in the demo circuit. The EMI filter
is designed to meet the EN55022 Class B standard. The
table below summarizes the performance.
The demo circuit can be easily modified for applications
requiring different output voltages/currents from either
an AC or DC input. Some pre-designed EFD25, EF16,
and EF25 transformers from vendors such as Würth
Electronics, Sumida, Pulse Engineering and Coilcraft can
L, LT, LTC, LTM, µModule, Linear Technology and the Linear logo are registered trademarks of
Linear Technology Corporation. All other trademarks are the property of their respective owners.
be assembled on the board. Some of these transformers
are listed in Table 1.
The LT3748 is a high input voltage isolated flyback con-
troller that eliminates the need for an optocoupler and
secondary-side reference voltage, all while maintaining
isolation between the primary and secondary-side with
only one part, the transformer, having to cross the isola-
tion barrier. The LT3748 is well suited for a wide variety
of industrial, automotive, medical, telecom, datacom
applications, where regulated isolated output is required.
The LT3748 datasheet gives a complete description of the
part, operation and application information. The datasheet
should be read in conjunction with this quick start guide
for Demonstration Circuit 1745A before powering the
demo circuit.
Design files for this circuit board are available at
http://www.linear.com/demo
perForMAnce sUMMArY
(TA= 25°C)
PARAMETER CONDITIONS MIN TYP MAX UNITS
Minimum Input DC Voltage IOUT = 3A 100 V
Maximum Input DC Voltage IOUT = 3A 400 V
Typical Start-Up DC Input Voltage Set by UVLO 70 V
Typical Shutdown DC Input Voltage Set by UVLO 60 V
Minimum Input AC Voltage Line Frequency, 50Hz/60Hz 85 VAC (RMS)
Maximum Input AC Voltage Line Frequency, 50Hz/60Hz 265 VAC (RMS)
Output Voltage, VOUT VIN = 100V ~ 400V (DC), IOUT = 150mA ~ 3A 15 ±5% V
Output Current, IOUT VIN = 100V ~ 400V (DC) 3 A
Minimum Load Current with Regulated Output, IMIN 150 mA
Typical Efficiency with DC INPUT VIN = 100V ~ 400V (DC), IOUT = 3A 87 %
Typical Efficiency with AC INPUT VIN = 85V ~ 265V (AC), IOUT = 3A 84 %
Maximum Ripple Voltage, VP-P VIN = 400V (DC), IOUT = 3A 750 mV
Maximum Switching Frequency at Full Load VIN = 400V (DC), IOUT = 3A 155 kHz
Minimum Switching Frequency at Full Load VIN = 100V (DC), IOUT = 3A 55 kHz
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DEMO MANUAL DC1745A
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Figure 1. Demo Board Setup
IMPORTANT NOTE TO CUSTOMERS
HIGH VOLTAGES ARE PRESENTED ONTHE DEMO CIRCUIT,
AND CAN LEAD TO LETHAL INJURIES TO HUMAN BODY.
ONLY QUALIFIED PERSONEL SHOULD OPERATE IT. IT IS
STRONGLY RECOMMENDED TO USE SAFETY GLASSES
AND AN ISOLATION TRANSFORMER.
Demonstration Circuit 1745A can be set up to evaluate
the performance of the LT3748 with high input voltages.
NOTE. IMPROPER COMPONENTSREPLACEMENT ON THE
DEMOCIRCUIT CANCAUSE PERFORMANCEDETERIORA-
TIONS, CIRCUIT MALFUNCTION, PROPERTY DAMAGE,
AND EVEN LIFE-THREATHENING INJURIES. CONTACT
LINEAR TECHNOLOGY APPLICATIONS ENGINEERS FOR
PROPER COMPONENT REPLACEMENT.
A) HIGH DC VOLTAGE APPLICATIONS
Refer to Figure 1 for proper measurement equipment setup
for DC inputs applications. It issuggestedthat theDC power
supply be connected to the VIN and GND ports on the up-
per left of the demo circuit. Follow the procedure below.
1. With power off, connect the DC input power supply to
VIN and GND on the board (Refer to Figure 1).
NOTE. MAKE SURE THAT PROPER INPUT PORTS ARE
USED. For DC INPUT, USE VIN AND GND PORTS ON
THE UPPER LEFT SIDE OF THE DEMO CIRCUIT.
NOTE. Make sure to use DC power supply with right
voltage and current capability and current limit function.
2. Connect the load to the terminals VOUT+and VOUT–on
the output terminals of the board. Apply 150mA load
to the output.
3. Turn on the power at the input. Increase the input volt-
age to minimum as specified in Performance Summary
Table (which is 100V for DC input).
NOTE. Make sure that the input voltage does not exceed
the maximum voltage specified in Performance Sum-
mary Table (which is 400V for DC input). Exceed this
limit might damage the demo circuit.
4. Check for the proper output voltages. The output should
be regulated at 15V (±5%).
NOTE. If there is no output, temporarily disconnect the
power supply. Make sure that the load is connected with
correct polarity. Make sure to connect the power source
to the correct input ports. If the output voltage is out
Table 1. Pre-Designed Transformers for High Voltage Applications with LT3748
TRANSFORMER
PART NUMBER
MAGNETIC
CORE
LPRI
(µH)
LLEAK
(nH)
NPSA
(NP:NS:NA)
RPRI
(mΩ)
RSEC
(mΩ)
TARGET APPLICATION PEAK CURRENT
ISAT (A)INPUT (V) OUTPUT
750311715 EFD25 280 4000 10:1:1 300 20 60 ~ 600 15V/2A 2.5
750311771 EFD25 500 5000 6:1:1 450 15 100 ~ 400 15V/3A 2.5
10393-T029 EFD25 400 6500 7:1:1 300 15 100 ~ 400 12V/3.5A 2.2
750311715 EFD25 280 4000 10:1:1 300 20 60 ~ 600 15V/2A 2.5
750811048 EE16 1500 14000 4.4:1:0.5 2900 210 120 ~ 375 30V/0.3A 0.65
750811050 EE16 1500 30000 4:1:0.3 4900 550 100 ~ 400 48V/0.2A 0.65
7508110117 EE16 650 20000 9:1:2.45 2400 65 100 ~ 400 5V/2A 0.88
7508110313 EE16 1400 30000 6:1:1 4900 185 100 ~ 400 15V/0.6A 0.54
perForMAnce sUMMArY
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DEMO MANUAL DC1745A
of spec, make sure minimum load current is applied to
the output, the load is not set too high, and the current
of power supply is below current limit.
5. Once the proper output voltage is established, adjust the
input and load within the operating range and observe
the output voltage regulation, ripple voltage, efficiency
and other parameters.
NOTE. When measuring the output voltage ripples,
care must be taken to avoid a long ground lead on the
oscilloscope probe. Measure the output voltage ripple
by touching the probe tip directly across the VOUT+and
VOUT–terminals. See Figure 3 for proper scope probe
technique.
Typical operation waveforms, regulation and efficiency
curves are shown in Figures 4, 5 and 6.
B) HIGH AC VOLTAGE APPLICATIONS
Optionally, this demo circuit 1745A can be used for off-line
applications with universal ac inputs (85V ~ 265V). Refer
to Figure 2 for proper measurement equipment setup.
Follow the procedure below.
1. With power off, connect the AC power supply to the AC
input connector on the board (Refer to Figure 2).
NOTE. Make sure that ONLY AC input ports are used.
For AC input, use Line and NEUT ports on the lower
left side of the board. Connect AC voltages to DC input
port will damage the demo circuit.
2. Connect the load to the terminals VOUT+and VOUT–on
the board. Apply 150mA load to the output terminals.
3. Turn on the power at the input. Increase the input volt-
age to minimum as specified in Performance Summary
Table (which is 85VRMS for AC input).
NOTE. Make sure that the input voltage does not exceed
the maximum voltage specified in Tableon Performance
Summary (which is 265VRMS for AC input).
4. Check for the proper output voltages. The output should
be regulated at 15V (±5%).
NOTE. If there is no output, temporarily disconnect the
power supply. Make sure that the load is connected
with correct polarity. Make sure you connect the power
source to the correct input ports. If the output voltage
is out of spec, make sure minimum load current is
applied to the output, the load is not set too high, and
the current of power supply is below current limit.
5. Once the proper output voltage is established, adjust the
input and load within the operating range and observe
the output voltage regulation, ripple voltage, efficiency
and other parameters.
NOTE. When measuring the output voltage ripples,
care must be taken to avoid a long ground lead on the
oscilloscope probe. Measure the output voltage ripple
by touching the probe tip directly across the VOUT+and
VOUT–terminals. See Figure 3 for proper scope probe
technique.
NOTE. When doing the short-circuit test, make sure to
short the output with very short wires to exclude any
parasitic inductance of the short-circuit.
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DEMO MANUAL DC1745A
Figure 1. Proper Measurement Equipment Setup for DC Input
Figure 2. Proper Measurement Equipment Setup for AC Input
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DEMO MANUAL DC1745A
Figure 3. Proper Scope Probe Placement for Measuring Output Ripple
Efficiency Regulation
Figure 4. Typical Curves of Efficiency and Regulations
LOAD CURRENT (A)
0
EFFICIENCY (%)
100
10
90
70
50
30
80
60
40
20
02.51.5
dc1745 F04a
3.52.01.0 3.00.5
VIN = 100V
VIN = 200V
VIN = 300V
VIN = 400V
LOAD CURRENT (A)
0
V
OUT
(V)
15.05
15.00
14.90
14.80
14.95
14.85
14.75
14.70 2.51.5
dc1745 F04b
3.52.01.0 3.00.5
VIN = 100V
VIN = 200V
VIN = 300V
VIN = 400V
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DEMO MANUAL DC1745A
Figure 5. Transient with 0.75A to 1.5A at 100V and 400V Input
Figure 6. Typical Waveforms for Short Circuit Conditions
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VOUT = 1V/DIV
IOUT = 500mA/DIV
dc1745 F05a
VIN = 100V
VOUT = 15V
IOUT = 0.75A TO 1.5A
500µs/DIV
VOUT = 500mV/DIV
IOUT = 500mA/DIV
dc1745 F05b
VIN = 400V
VOUT = 15V
IOUT = 0.75A TO 1.5A
500µs/DIV
VDS = 200V/DIV
IOUT = 10A/DIV
ISW = 5A/DIV
dc1745 F06b
VIN = 200V 1ms/DIV
VDS = 200V/DIV
IOUT = 5A/DIV
ISW = 5A/DIV
dc1745 F06a
VIN = 100V 1ms/DIV
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DEMO MANUAL DC1745A
pArts list
QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER
Required Circuit Components
2 CAC1,CAC2 Capacitor, 0.1µF, 250V/275VAC ECQ-UL, 20% Panasonic, ECQU2A104ML
2 C1,CAC4 Capacitor, 33µF, 450V, Size 18mm ×20mm, 20% Nippon Chemi-Con, EKXG451ESS330MM20S
1 C2 Capacitor, FILM, 0.1µF, 400VDC, 10% Panasonic, ECQE4104KF
7 C6,C15-C17 Capacitor, X5R, 22µF, 25V, 20%, 1210 AVX, 12103D226MAT2A
1 C7 Capacitor, X5R, 10µF, 6.3V, 20%, 0603 TDK, C1608X5ROJ106M
1 C8 Capacitor, C0G, 470pF, 50V, 10%, 0603 AVX, 06035A471KAT2A
1 C10 Capacitor, X7R, 0.1µF, 200V, 10%, 1210 AVX, 12102C104KAT2A
1 C11 Capacitor, X7R, 15nF, 25V, 10%, 0603 AVX, 06033A153KAT2A
1 C12 Capacitor, 1000pF, 400VAC Vishay, 440LD10-R
1 C20 Capacitor, NPO, 220pF, 100V, 10%, 0805 AVX, 08051A221KAT2A
1 C21 Capacitor, X7R, 4.7µF, 16V, 20%, 0805 AVX, 0805YC475MAT2A
1 C22 Capacitor, C0G, 47pF, 50V, 10%, 0603 AVX, 06035A470KAT2A
1 DZ1 Zener Diode, 15V, SOD-123 Central Semi., CMHZ4702
2 DZ2,DZ3 Zener Diode, 8.2V, SMA (SMB, SMC) Central Semi., CMZ5923B
1 D1 Super Barrier Rec., 20A, 200V, SBR Diodes, SBR20A200CTB
1 D2 Ultrafast Avalanche Rec., BYG20J, SMA Vishay, BYG20J
1 D5 Schottky Barrier Rec., 1N5711WS, SOD-323 Diodes, 1N5711WS-7-F
1 D6 Dual SW Diode, BAV70W, SOT-323 Diodes, BAV70W-7-F
4 D7,D8,D9,D10 Diode Rec.,1N4004, DO-41 Diodes, 1N4004-T
1 F1 Fuse, 250V, 2.5A Cooper Busmann, SS-5F-3.15A
1 LAC1 Current-Compensated Chock Wurth, 7448640414
1 LAC2 Common Mode Chock Wurth, 744822120
1 L1 Inductor, 1µH Vishay, IHLP1616BZER1ROM11
1 Q1 N-CH MOSFET, 600V, 9A, DPAK/D-2-PAK Fairchild, FCD9N60NTM
1 Q2 Power Transistor, SPN03N60C3, SOT-223 Infineon, SPN03N60C3
2 RAC2,RAC3 Resistor, Chip, 1M, 5%, 1206 Vishay, CRCW12061M00JNEA
1 R1 Resistor, Chip, 11.8k, 1%, 0603 Vishay, CRCW060311K8FKEA
1 R2 Resistor, Chip, 0Ω, 0603 Vishay, CRCW06030000Z0EA
1 R3 Resistor, Chip, 1000k, 5%, 1206 Vishay, CRCW12061M00JNEA
1 R5 Resistor, Chip, 6.04k, 1%, 0603 NIC, NRC06F6041TRF
1 R6 Resistor, Chip, 41.2k, 1%, 0603 Vishay, CRCW0603348KFKEA
1 R9 Resistor, Chip, 75k, 5%, 0603 Vishay, CRCW060375K0JKEA
1 R10 Resistor, Chip, 0.04Ω, 1% 0805 (1206) Vishay, WSL0805R0400FEA
1 R11 Resistor, Chip, 30Ω, 1%, 0603 Vishay, CRCW060330R0FKEA
2 R12,R13 Resistor, Chip, 510k, 5%, 1206 Vishay, CRCW1206510KJKEA
1 R17 Resistor, Chip, 10Ω, 5%, 0805 NIC, NRC10J100TRF
1 R18 Resistor, Chip, 68.1k, 1%, 0603 Yageo, RC0603FR-0768K1L
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DEMO MANUAL DC1745A
pArts list
QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER
1 R19 Resistor, 2.2Ω, 4W, 15% Murata, NTPA2R2LDNB0
1 R20 Resistor, Chip, 34.0, 1%, 1206 Vishay, CRCW120634R0FKEA
1 R22 Resistor, Chip, 22k, 5%, 1210 Yageo, RC1210JR-0722KL
1 R23 Resistor, Chip, 6.04, 1%, 0603 Yageo, RC0603FR-076R04L
2 R24,R25 Resistor, Chip, 510, 5%, 1210 NIC, NRC25J511TRF
1TVS VDR Metal Oxide Varistor Vishay, VDRS10P320BSE
1 TVS1 TVS, 150V, SMCJ150, SMC Diodes, SMCJ150A-13-F
1 T1 Transformer, CEFD2513B TYPE Sumida, 10393-T029
1 U1 IC LT3748, MSOP-16 Linear Technology, LT3748#TRPBF
Additional Demo Board Circuit Components
0 R14 Resistor, 1210 (OPT) Option
0 C19 (OPT) Capacitor, 1206 (OPT) Option
0 C14, C18 (OPT) Capacitor, 1210 Option
Hardware/Components (For Demo Board Only)
4 STAND-OFF Stand-Off, Nylon 0.25", Snap On Keystone, 8831
4 J1,J2,J3,J4 Jack, Banana Keystone, 575-4
1 J5 Terminal Block, PCB Mount, 282836-3 Tyco, 282836-3
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DEMO MANUAL DC1745A
Information furnished by Linear Technology Corporation is believed to be accurate and reliable.
However, no responsibility is assumed for its use. Linear Technology Corporation makes no representa-
tion that the interconnection of its circuits as described herein will not infringe on existing patent rights.
scheMAtic DiAgrAM
5 5
4 4
3 3
2 2
1 1
D D C C B B A A
  
VIN
GND
100V - 400VDC
85 - 265VAC
OPTIONAL CIRCUIT
VOUT+
VOUT-
1210
15V / 3A
Nippon Chemi-Con PANASONIC
SMA/SMB/SMC
SMA/SMB/SMC
10/29/10
LINE NEUT.
CAUTION: HANDLING WITH HIGH VOLTAGE INVOLVES RISK TO LIFE. COMPLY WITH SAFETY REGULATIONS!

GND
GND
VIN
VIN
ENABLEENABLE
 
 
 




TECHNOLOGY 
   
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        
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
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

DEMO CIRCUIT 1745A

HIGH VOLTAGE FLYBACK USING THIRD WINDING

LT3748EMS


 
 
 




TECHNOLOGY 
   

        





DEMO CIRCUIT 1745A

HIGH VOLTAGE FLYBACK USING THIRD WINDING

LT3748EMS


 
 
 




TECHNOLOGY 
   

        





DEMO CIRCUIT 1745A

HIGH VOLTAGE FLYBACK USING THIRD WINDING

LT3748EMS



 






 






 





+
CAC4
450V

33uF
+
CAC4
450V

33uF
C16
25V 22uF
C16
25V 22uF
470pF
C8
470pF
C8
CAC2
310VAC
BFC233826104
0.1uFCAC2
310VAC
BFC233826104
0.1uF
Q2
SPN03N60C3
SOT-223
Q2
SPN03N60C3
SOT-223
1
2 3
4
15nF
C11
15nF
C11
12
D7
1N4004
12
D7
1N4004
T1
SUMIDA
10393-T029
T1
SUMIDA
10393-T029
1 3
12 9 11 8
2 4
7 105
6
R22 22k 1210 R22 22k 1210
C12
440LD10-R
1000pF
C12
440LD10-R
1000pF
12
D10 1N4004
12
D10 1N4004
R5
6.04K
R5
6.04K
F1 250V, 2.5A SS-5F-3.15A F1 250V, 2.5A SS-5F-3.15A
J4J4
R2
0
R2
0
CAC1
310VAC
BFC233826104
0.1uFCAC1
310VAC
BFC233826104
0.1uF
C2
ECQE4104KF
0.1uF
400V
C2
ECQE4104KF
0.1uF
400V
4.7uF
C21 16V
0805
4.7uF
C21 16V
0805
12
DZ1
CMHZ4702
12
DZ1
CMHZ4702
TVS
VDRS10P320BSE
TVS
VDRS10P320BSE
R17
10
0805 R17
10
0805
D1
SBR20A200CTB
D1
SBR20A200CTB
2
1
3
C14 (OPT) C14 (OPT)
RAC2
1206
1M
RAC2
1206
1M
12
D2 BYG20J
SMA
12
D2 BYG20J
SMA
C13 22uF
25V
1210 C13 22uF
25V
1210
12
D9
1N4004
12
D9
1N4004
C19
OPT. 1206 500V
C19
OPT. 1206 500V
R1
11.8K
R1
11.8K
J5J5
3
2
1
R25 510 1210 R25 510 1210
J2J2 R24
510 1210 R24 510 1210
R12 510K 1206 R12 510K 1206
C10 100nF 1210 C10 100nF 1210
LAC1
WE 7448640414
LAC1
WE 7448640414
23 14
12
TVS1
SMCJ150
150V
12
TVS1
SMCJ150
150V
R20
34
1206
R20
34
1206
R14
OPT. 1210
R14
OPT. 1210
R11 30 R11 30
TP1
VDS
TP1
VDS
12
DZ2 CMZ5923B
12
DZ2 CMZ5923B
D6
BAV70W
D6
BAV70W
1
3
2
12
D5 1N5711WS-7-F
12
D5 1N5711WS-7-F
U1
LT3748EMS
U1
LT3748EMS
VIN 1
EN/UVLO
3
SS
10
VC
11
SENSE 7
5
INTVCC
GATE 6
RFB 16
14
RREF
TC
12
GND
9
GND
8
10uF
C7
10uF
C7
C15C15
R9
75K
R9
75K
J1J1 L1
1.0uH
IHLP1616BZER1R0M01
L1
1.0uH
IHLP1616BZER1R0M01
J3J3
R23 6.04 R23 6.04
R18 68.1K R18 68.1K
LAC2
WE 744822120
LAC2
WE 744822120
23 14
C18 (OPT)C18 (OPT)
R10 0.040 0805 R10 0.040 0805
RAC3 1206
1M
RAC3 1206
1M
R6 41.2K R6 41.2K
C20 220pF 0805
100V
C20 220pF 0805
100V
Q1
FCD9N60N
Q1
FCD9N60N
1
4 3
R3 1M 1206 R3 1M 1206 22uF
C6 1210 25V 22uF C6 1210 25V
C17C17
12
D8
1N4004
12
D8
1N4004
R13 510K 1206 R13 510K 1206
2.2
R19
FKN400 SERIES
4W
2.2
R19
FKN400 SERIES
4W
47pF C22 10V 47pF C22 10V
R26 1M 1206 R26 1M 1206
+C1
33uF 450V
EKXG451ESS330MM20S +C1
33uF 450V
EKXG451ESS330MM20S
12
DZ3 CMZ5923B
12
DZ3 CMZ5923B
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10
dc1745afa
DEMO MANUAL DC1745A
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
[phone] ●FAX: [phone] ●www.linear.com
 LINEAR TECHNOLOGY CORPORATION 2011
LT 0411 REV A • PRINTED IN USA
DEMONSTRATION BOARD IMPORTANT NOTICE
Linear Technology Corporation (LTC) provides the enclosed product(s) under the following AS IS conditions:
This demonstration board (DEMO BOARD) kit being sold or provided by Linear Technology is intended for use for ENGINEERING DEVELOPMENT
OR EVALUATION PURPOSES ONLY and is not provided by LTC for commercial use. As such, the DEMO BOARD herein may not be complete
in terms of required design-, marketing-, and/or manufacturing-related protective considerations, including but not limited to product safety
measures typically found in finished commercial goods. As a prototype, this product does not fall within the scope of the European Union
directive on electromagnetic compatibility and therefore may or may not meet the technical requirements of the directive, or other regulations.
If this evaluation kit does not meet the specifications recited in the DEMO BOARD manual the kit may be returned within 30 days from the date
of delivery for a full refund. THE FOREGOING WARRANTY IS THE EXCLUSIVE WARRANTY MADE BY THE SELLER TO BUYER AND IS IN LIEU
OF ALL OTHER WARRANTIES, EXPRESSED, IMPLIED, OR STATUTORY, INCLUDING ANY WARRANTY OF MERCHANTABILITY OR FITNESS
FOR ANY PARTICULAR PURPOSE. EXCEPT TO THE EXTENT OF THIS INDEMNITY, NEITHER PARTY SHALL BE LIABLE TO THE OTHER FOR
ANY INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES.
The user assumes all responsibility and liability for proper and safe handling of the goods. Further, the user releases LTC from all claims
arising from the handling or use of the goods. Due to the open construction of the product, it is the user’s responsibility to take any and all
appropriate precautions with regard to electrostatic discharge. Also be aware that the products herein may not be regulatory compliant or
agency certified (FCC, UL, CE, etc.).
No License is granted under any patent right or other intellectual property whatsoever. LTC assumes no liability for applications assistance,
customer product design, software performance, or infringement of patents or any other intellectual property rights of any kind.
LTC currently services a variety of customers for products around the world, and therefore this transaction is not exclusive.
Please read the DEMO BOARD manual prior to handling the product. Persons handling this product must have electronics training and
observe good laboratory practice standards. Common sense is encouraged.
This notice contains important safety information about temperatures and voltages. For further safety concerns, please contact a LTC applica-
tion engineer.
Mailing Address:
Linear Technology
1630 McCarthy Blvd.
Milpitas, CA 95035
Copyright © 2004, Linear Technology Corporation
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