Linear Technology DC1739A-B Quick setup guide

dc1739afb

DEMO MANUAL DC1739A-B

DESCRIPTION

LTC3765/LTC3766

150W High Efficiency Active Clamp

Forward Converter

Demonstration circuit 1739A-B is a 150W isolated forward

converter with synchronous rectification featuring the

LTC3765/LTC3766.

This circuit demonstrates a high level of performance, ef-

ficiency, and small solution size attainableusing these parts

in an active-clamp-reset forward converter power supply.

It operates at 240kHz and produces a regulated 12V, 12.5A

output from an input voltage range of 18V to 72V, making

it well suited for telecom, industrial, and other applica-

tions. It has an eighth-brick footprint size of 0.90" ×2.3". L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear

Technology Corporation and Direct Flux Limit is a trademark of Linear Technology Corporation.

All other trademarks are the property of their respective owners.

PERFORMANCE SUMMARY

OPERATING PRINCIPLES

Synchronous rectification helps to attain efficiency ex-

ceeding 94%. Secondary-side control eliminates complex

opto-coupler feedback, providing fast transient response

with minimum output capacitance. The proprietary Direct

Flux Limit™

scheme guarantees no transformer saturation.

For other output requirements, see the LTC3766 data sheet

or contact the LTC factory.

Design files for this circuit board are available at

http://www.linear.com/demo

(TA= 25°C)

SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS

VIN Input Supply Range 18 72 V

VOUT Output Voltage 12.0 V

IOUT Output Current Range, Continuous 200LFM 0 11 A

IOUT Output Current , Peak 200LFM 12.5 A

fSW Switching (Clock) Frequency 240 kHz

VOUT P-P Output Ripple VIN = 48V, IOUT = 12A (20MHz BW) 60 mVP–P

IREG Output Regulation Line and Load (18-72VIN, 0-12AOUT) ±0.08 %

POUT/PIN Efficiency (see Figure 3) VIN = 48V, IOUT = 10A 93.6 %

Isolation Basic 1500 VDC

Approximate Size Component Area ×Top Component Height 2.3 ×0.9 ×0.47 Inches

The LTC3765 active clamp forward controller and gate

driver is used on the primary and provides start-up,

gate drive, and protection functions. Once start-up is ac-

complished, the LTC3766 high efficiency, secondary-side

synchronous forward controller takes over, and provides

the LTC3765 with timing information and bias power

through a small pulse transformer.

When input voltage is applied, the LTC3765 commences

soft-start of the output voltage. When the secondary bias

source reaches the undervoltage threshold, the LTC3766

comes alive and takes control by sending encoded PWM

gate pulses to the LTC3765 through T3. These pulses also

provide primary bias power efficiently over a wide input

voltage range.

dc1739afb

DEMO MANUAL DC1739A-B

QUICK START PROCEDURE

Demonstration circuit 1739 is easy to set up to evalu-

ate the performance of the LTC3765/LTC3766. Refer to

Figure 1 for proper measurement equipment setup and

follow the procedure below:

NOTE.When measuring theoutput voltageripple, caremust

be taken to avoid a long ground lead on the oscilloscope

probe. Measure the output voltage ripple by touching the

probe tip and ground ring directly across the last output

capacitor as shown in Figure 1.

1. Set an input power supply that is capable of 18V to 72V

to 18V. Then turn off the supply.

2. Directan airflow of 200LFM across the unit for sustained

operation at full load.

3. Withpower off,connect thesupply tothe inputterminals

+VIN and –VIN.

a. Input voltages lower than 18V can keep the converter

from turning on due to the undervoltage lockout

feature of the LTC3765/LTC3766.

b. If efficiency measurements are desired, an ammeter

capable of measuring 10ADC or a resistor shunt can

be put in series with the input supply in order to

measure the DC1739A-B’s input current.

c. A voltmeter with a capability of measuring at least

72V can be placed across the input terminals in order

to get an accurate input voltage measurement.

The transition from primary to secondary control occurs

at some fraction of the nominal output voltage. From then

on, operation and design is simplified to that of a simple

buck converter. Secondary control eliminatesdelays, tames

large-signal overshoot, and reduces output capacitance

needed to meet transient response requirements.

An optional LC filter stage on the input lowers RMS input

current. The filter must have output impedance that is

less than the converter input impedance to assure stabil-

ity. This may require a damping impedance. (See Linear

OPERATING PRINCIPLES

Technology Application Note AN19 for a discussion of

input filter stability.) A source with a 300mΩ or higher ESR

at the filter resonant frequency (~100kHz) is one way of

providing damping for the filter elements provided on the

DC1739A-B. For bench testing, an electrolytic capacitor

has been added at the input terminals to provide suitable

damping and ripple current capability. The values selected

have a filter resonant frequency that is below the converter

switching frequency, thus avoiding high circulating cur-

rents in the filter.

4. Turn on the power at the input.

NOTE. Make sure that the input voltage never exceeds 75V.

5. Check for the proper output voltage of 12V. Turn off the

power at the input.

6. Once the proper output voltages are established, con-

nect a variable load capable of sinking 12.5A at 12V to

the output terminals +VOUT and –VOUT. Set the current

for 0A.

a. If efficiency measurements aredesired,an ammeteror

a resistor shunt that is capable of handling 12.5ADC

can be put in series with the output load in order to

measure the DC1739A-B’s output current.

b. A voltmeter with a capability ofmeasuring at least 12V

can be placed across the output terminals in order

to get an accurate output voltage measurement.

7. Turn on the power at the input.

NOTE. If there is no output, temporarily disconnect the

load to make sure that the load is not set too high.

8. Once the proper output voltage is again established,

adjust the load within the operating range and observe

the output voltage regulation, ripple voltage, efficiency

and other desired parameters.

dc1739afb

DEMO MANUAL DC1739A-B

QUICK START PROCEDURE

Figure 1. Proper Measurement Equipment Setup

dc1739a F02

2 4 6 8 10 12

POWER DISSIPATION (W)

EFFICIENCY ( %)

IOUT (A)

PD, 48VIN

PD, 24VIN

Eff, 48VIN

Eff, 24VIN

DC1739A-B Efficiency

Figure 2. Efficiency and Power Dissipation

dc1739afb

DEMO MANUAL DC1739A-B

QUICK START PROCEDURE

Figure 3. Output Ripple at 48VIN and 11AOUT (50mV, 2μs/DIV, 20MHz)

Figure 4. Transient Response Waveform at 48VIN and 6 – 12AOUT (5A, 500mV, 100μs/DIV)

IOUT

VOUT

dc1739afb

DEMO MANUAL DC1739A-B

Figure 5. Thermal Map, Frontside at 48VIN and 11AOUT (TA= 25°C, 200LFM)

Figure 6. Thermal Map, Backside at 48VIN and 11AOUT (TA= 25°C, 200LFM)

dc1739afb

DEMO MANUAL DC1739A-B

PARTS LIST

ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER

Required Circuit Components

1 1 C1 CAP., AL., TH, 33μF, 100V, ME-PX series SUNCON, 100ME33PX

2 4 C2, C3, C4, C5 CAP., X7R, 2.2μF, 100V, 20%, 1210 MURATA, GRM32ER72A225MA35

3 1 C6 CAP., C0G, 47pF, 200V, 5%, 1206 AVX, 12062A470JAT2A

4 2 C8, C9 CAP., POSCAP, 68μF, 16V, 20%, 7343 SANYO, 16TQC68M

5 1 C10 CAP., X7R, 1.0nF, 630V, 10%, 1206 MURATA, GRM31A7U2J102J

6 2 C11, C12 CAP., X7R, 22μF, 16V, 1210 MURATA, GRM32ER71C226ME20

7 1 C13 CAP., X7R, 1.0μF, 100V, 10%, 1206 MURATA, GRM31CR72A105KA01

8 1 C14 CAP., X7R, 0.1μF, 250V, 10%, 1206 MURATA, GRM31CR72E104KW03

9 1 C16 CAP., C0G, 1000pF, 25V, 5%, 0402 TDK, C1005C0G1E102J

10 3 C17, C20, C35 CAP., X7R, 0.1μF, 25V, 10%, 0603 AVX, 06033C104KAT2A

11 1 C18 CAP., C0G, 470pF, 25V, 5%, 0603 AVX, 06033A471JAT2A

12 2 C21, C23 CAP., X7R, 1.0uF, 16V 10%, 0805 MURATA, GRM21BR71C105KA01L

13 1 C22 CAP., C0G, 220pF, 25V, 5%, 0603 AVX, 06033A221JAT2A

14 1 C24 CAP., X7R, 2200pF, 250V, 10%, 1812 MURATA, GA343QR7GD222KW01L

15 1 C25 CAP., COG, 0.033μF, 25V, 5%, 0805 TDK, C2012C0G1E333J

17 1 C27 CAP., X7R, 10μF, 16V, 1206 MURATA, GRM31CR61C106MA88

18 1 C28 CAP., X7R, 0.010μF, 50V, 10%, 0603 AVX, 06035C103KAT2A

19 1 C29 CAP., X7R, 0.033μF, 25V, 10%, 0603 AVX, 06033C333KAT2A

20 3 C30, C31, C37 CAP., C0G, 1000pF, 25V, 5%, 0603 AVX, 06033A102JAT2A

21 1 C32 CAP., C0G, 47pF, 25V, 5%, 0603 AVX, 06033A470JAT2A

22 1 C33 CAP., C0G, 2200pF, 25V, 5%, 0603 TDK, C1608C0G1E222J

24 2 D1, D4 DIODE ULTRA FAST 1A 200V SMP VISHAY, ES1PD-M3 / 84A

25 2 D3, D5 DIODE SCHOTTKY 40V 0.4A SOD323 DIODES INC., ZHCS400TA

26 1 L1 INDUCTOR, 1.5μH 20% VISHAY, IHLP2525EZER1R5M01

27 1 L4 INDUCTOR, 8.0μH PULSE PA2729.802NL

28 1 Q1 MOSFET, N-CH 120V POWERPAK-SO-8 FAIRCHILD, FDMS86201

29 1 Q3 MOSFET, N-CH 80V POWERPAK-SO-8 FAIRCHILD, FDMS86322

30 1 Q4 MOSFET, N-CH 150V POWERPAK-SO-8 FAIRCHILD, FDMS86200

31 1 Q5 MOSFET, P-CH, IRF6217, SO-8 IR, IRF6217TR

32 1 Q6 MOSFET, N-CH, SUPER SOT-6 FAIRCHILD, FDC2512-NL

33 1 Q7 Transistor, NPN, SOT23 DIODES, FMMT491A

34 1 Q8 Transistor, NPN, SOT323 DIODES, MMST3904

35 1 R1 RES., CHIP, 51.1, 1/4W, 1%, 1206 VISHAY, CRCW120651R1FKEA

36 2 R4, R5 RES., CHIP, 68.1k, 1/4W, 1%, 1206 VISHAY, CRCW120668K1FKEA

37 1 R7, R37 RES., CHIP, 909, 1/8W, 1%, 0805 VISHAY, CRCW0805909RFKEA

39 1 R10 RES., CHIP, 0.004, 1W, 1%, 2512 Panasonic, ERJ-M1WTF4M0U

40 1 R11 RES., CHIP, 75, 1/8W, 1%, 0805 VISHAY, CRCW080575R0FKEA

42 1 R14 RES., CHIP, 0.006, 1W, 1%, 2512 Panasonic, ERJ-M1WSF6M0U

ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER

Required Circuit Components

44 1 R17 RES., CHIP, 61.9k, 1/8W, 1%, 0805 VISHAY, CRCW080561K9FKEA

dc1739afb

DEMO MANUAL DC1739A-B

PARTS LIST

45 1 R18 RES., CHIP, 100k, 1/8W, 5%, 0805 VISHAY, CRCW0805100KJNEA

46 4 R19, R20, R23, R24 RES., CHIP, 100, 1/32W, 1%, 0402 VISHAY, CRCW0402100RFKEA

47 1 R22 RES., CHIP, 1.82k, 1/4W, 1%, 1206 VISHAY, CRCW12061K82FKEA

48 1 R25 RES., CHIP, 10k, 1/16W, 1%, 0603 VISHAY, CRCW060310K0FKEA

49 1 R27 RES., CHIP, 0.750, 1/8W, 1%, 0805 SUSUMU, RL1220S-R75-F

50 1 R29 RES., CHIP, 19.1k, 1/16W, 1%, 0603 VISHAY, CRCW060319K1FKEA

51 1 R35 RES., CHIP, 1.82k, 1/16W, 1%, 0603 VISHAY, CRCW06031K82FKEA

52 1 R36 RES., CHIP, 11.5k, 1/16W, 1%, 0603 VISHAY, CRCW060311K5FKEA

53 2 R38, R39 RES., CHIP, 100, 1/16W, 1%, 0603 VISHAY, CRCW0603100RFKEA

55 1 R41 RES., CHIP, 4.12k, 1/16W, 1%, 0603 VISHAY, CRCW06034K12FKEA

56 1 R44 RES., CHIP, 56.2k, 1/16W, 1%, 0603 VISHAY, CRCW060356K2FKEA

57 1 R46 RES., CHIP, 60.4k, 1/16W, 1%, 0603 VISHAY, CRCW060360K4FKEA

58 1 R47 RES., CHIP, 15.0k, 1/16W, 1%, 0603 VISHAY, CRCW060315K0FKEA

59 1 R48 RES., CHIP, 4.99k, 1/16W, 1%, 0603 VISHAY, CRCW06034K99FKEA

60 1 R49 RES., CHIP, 1.87k, 1/16W, 1%, 0603 VISHAY, CRCW06031K87FKEA

61 1 R50 RES., CHIP, 604, 1/16W, 1%, 0603 VISHAY, CRCW0603604RFKEA

62 1 R51 RES., CHIP, 13.3k, 1/16W, 1%, 0603 VISHAY, CRCW060313K3FKEA

63 1 R52 RES., CHIP, 22k, 1/16W, 5%, 0603 VISHAY, CRCW060322KJNEA

64 1 R53 RES., CHIP, 8.25k, 1/16W, 1%, 0603 VISHAY, CRCW06038K25FKEA

65 1 R56 RES., CHIP, 1.00k, 1/16W, 1%, 0603 VISHAY, CRCW06031K00FKEA

66 1 T1 TRANSFORMER, 4T:4T:4T PULSE, PA0801NL

67 1 T3 TRANSFORMER, 1.25T:1T PULSE, PA3493NL

68 1 U1 I.C. LTC3765EMSE, MSOP-16PIN LINEAR TECH., LTC3765EMSE

69 1 U2 I.C. LTC3766EGN28, SSOP-GN28 LINEAR TECH., LTC3766EGN

Additional Demo Board Circuit Components

70 0 C7 CAP., OPT, 0805

71 0 C15 CAP., OPT, 0603

72 0 C36 CAP., OPT, 0402

16 1 C26 0Ω Jumper 0603 VISHAY, CRCW06030000Z0EA

72 0 C34 CAP., OPT, 1206

73 0 D6 DIODE OPT SOT23

74 0 L5 INDUCTOR, OPT 1608

75 0 Q2 MOSFET OPT POWERPAK-SO-8

0 Q8 TRANSISTOR OPT NPN SOT323

38 8 R9, R21, R30-R33, R45, R54 0Ω Jumper 0402 VISHAY, CRCW04020000Z0ED

76 0 R12, R13, R28, R43 RES., OPT, 0402

77 0 R15, R26, R42 RES., OPT, 0603

54 1 R40 0Ω Jumper 0603 VISHAY, CRCW06030000Z0EA

Hardware For Demo Board Only

78 4 E1, E2, E3, E4 TESTPOINT, TURRET, .090" pbf MILL-MAX, 2501-2-00-80-00-00-07-0

79 4 J1, J2, J3, J4 Connector, Banana Jack KEYSTONE, 575-4

80 4 MTGS at 4 Corners STANDOFF, NYLON .5 1/2" KEYSTONE, 8833(SNAP-ON)

dc1739afb

DEMO MANUAL DC1739A-B

SIMPLE SCHEMATIC DIAGRAM

C C

B B

A A

12V / 12.5A

Fsw=240KHz

1T1.25T

+VOUT

-VOUT

-VIN

+VIN

Unless otherwise specified:

All resistors are in ohms 0603.

All capacitors are in microfarads 0603.

All capacitors are 25V.

1/16W = 0603, 1/8W = 0805, 1/4W = 1206.

18 to 72 VIN

NOTE:

2.2uF 100V Murata GRM32ER72A225MA35 (X7R 1210)

22uF 16V Murata GRM32ER61C226ME20 (X7R 1210)

2.2nF 250V Murata GA343QR7GD222KW01L (X7R 1812)

68uF 16V Sanyo 16TQC68M

33uF 100V Suncon 100ME33PX (10x12mm)

L1 Vishay IHLP2525EZER1R5M01

L4 Pulse PA2729.802NL

T1 PA0801NL

T3 PA3493NL

VCC

RS+

+VOUT

-VOUT

VIN

-VOUT

VIN

VCC

+VOUT

-VOUT

RS+RS-

RS-

R41

4.12K

C13

1.0uF

100V

1210

R29

19.1K

C31

1nF

R44

56.2K

51.1

1206

R46

60.4K R47

15.0K

C21

1uF

0805

C23

1uF

0805

C30

1nF

R10

0.004

2512

R24

100

0402

C28

10nF

C37

1.0nF

C3,C4,C5

2.2uF x3

100V

1210

1 6

R20

100

IRF6217 C35

0.1uF

C17

0.1uF

R52

22K

R23

100

0402

R53

8.25K

R19

100

C32

47pF

R49

1.87K

C18

470pF

FDMS86201

R36

11.5K

R38

100

C8,C9

68uF x2

16V

LTC3765EMSE

6 7

11 5

NDRV

VCC

IN+

IN-

RUN

DELAY IS-

GND

IS+

FS/UV

SSFLT

PGND

GND2

GAMSIEROCR

C10

1nF

630V

1206

ZHCS400

ES1PD

909

0805

C16

1nF

FDMS86200

2.2uF

100V

1210

7 2

R4,R5

68.1K x2 = 34K

1206

R18

100K

0805

33uF

100V

1.5uH

C24

2.2nF

250V

1812

R56

1.00K

C29

33nF

FMMT491A

R27

0.75

0805

R51

13.3K C33

2.2nF

C22

220pF

R37

909

0805

LTC3766EGNU2

820

ITH

GND

IS+

IS-

VCC

PT+

PT-

REGSD

FS/SYNC

MODE

PGND

VIN

NDRV

IPK

PHASE

VS+

VS-

VSOUT

RUN FGD/SWB

VSEC

SGD

VAUX

ES1PD

R11

0805

FDC2512

R22

1.82K

1206

R39

100

R17

61.9K

0805

8.0uH

2 1

FDMS86322

ZHCS400

R14

0.006

2512

R48

4.99K

47pF

200V

1206

C20

0.1uF

C27

10uF

1206

16V

R25

10K

C25

33nF

COG

0805

R35

1.82K

C11,C12

22uF x2

16V

1210

C14

0.1uF

1206

R50

604

dc1739afb

DEMO MANUAL DC1739A-B

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.

FULL SCHEMATIC DIAGRAM

C C

B B

A A

Unless otherwise specified:

All resistors are in ohms 0603.

All capacitors are in microfarads 0603.

All capacitors are 25V.

1/16W = 0603, 1/8W = 0805, 1/4W =

1206.

1.25T 1T

Fsw=240KHz

12V / 12.5A

NOTE:

2.2uF 100V Murata GRM32ER72A225MA35 (X7R 1210)

22uF 16V Murata GRM32ER61C226ME20 (X7R 1210)

2.2nF 250V Murata GA343QR7GD222KW01L (X7R 1812)

68uF 16V Sanyo 16TQC68M

33uF 100V Suncon 100ME33PX (10x12mm)

L1 Vishay IHLP2525EZER1R5M01

L4 Pulse PA2729.802NL

T1 PA0801NL

T3 PA3493NL

18 to 72 VIN

VCC

RS-

PGND

PGNDP

PGND

VIN

SGNDP

PGND

SGND

RS-

VCC

PGNDP

SGND

PGND

VAUX

SGNDP

PGNDP VPK

+VOUT

RS+

PGNDP

VPK +VOUT

RS+

SGND

VCC

VIN

PGND

RS-

PGND

VAUX

PGND

SGNDPSGNDP SGNDP

+VOUT

68.1K

1206

R41

4.12K

R32

0402

C27

10uF

1206

16V

R29

19.1K

C13

1.0uF

100V

1210

C31

1nF

R44

56.2K

51.1 1206

R21

0402

R15 OPT

0603

R46

60.4K R47

15.0K

R40

R12

OPT

0402

C21

1uF

0805

C12

22uF

16V

1210

C23

1uF

0805

R33

0402

C30

1nF

R10

0.004

2512

R24

100

0402

C37

1.0nF

1 6

C28

10nF

2.2uF

100V

1210

R20

100

IRF6217

OPT

0805

2.2uF

100V

1210

C35

0.1uF

R30

0402

2.2uF

100V

1210

OPT C34

OPT

1206

C17

0.1uF

R52

22K

C36

OPT

0402

R23

100

0402

R53

8.25K

R19

100

R43

OPT

0402

-VIN

OPT

C32

47pF

R13

OPT

0402

R49

1.87K

R54

0402

C18

470pF

R45

0402

FDMS86201

2 3

6 7 8

R36

11.5K

R38

100

68uF

16V

OPT

2 3

6 7 8

LTC3765EMSE

6 7

11 5

NDRV

VCC

IN+

IN-

RUN

DELAY IS-

GND

IS+

FS/UV

SSFLT

PGND

GND2

GAMSIEROCR

C10

1nF

630V

1206

ZHCS400

OPT

909

0805 D1

ES1PD

FDMS86200

678

C16

1nF

2.2uF

100V

1210

7 2

R31

0402

68.1K

1206

C15

OPT

50V

68uF

16V

R18

100K

0805

33uF

100V

C24

2.2nF

250V

1812

1.5uH

R56

1.00K

C29

33nF

R27

0.75

0805

+VIN

FMMT491A

R51

13.3K C33

2.2nF

C26

0ohms

C22

220pF

R26

OPT

0603

R37

909

0805

J4 -VOUT

FDC2512

4 1

R11

0805

LTC3766EGNU2

820

ITH

GND

IS+

IS-

VCC

PT+

PT-

REGSD

FS/SYNC

MODE

PGND

VIN

NDRV

IPK

PHASE

VS+

VS-

VSOUT

RUN FGD/SWB

VSEC

SGD

VAUX

ES1PD

R28

OPT

0402

R22

1.82K

1206

R39

100

R17

61.9K

0805

8.0uH

2 1

FDMS86322

678

0402

ZHCS400

R48

4.99K

R14

0.006

2512

47pF

200V

1206

C20

0.1uF

R25

10K

J3 +VOUT

C25

33nF

COG

0805

R35

1.82K

R42

OPT

C11

22uF

16V

1210

C14

0.1uF

1206

R50

604

dc1739afb

DEMO MANUAL DC1739A-B

LinearTechnology Corporation

1630 McCarthy Blvd., Milpitas, CA 95035-7417

(408) 432-1900 ●FAX: (408) 434-0507 ●www.linear.com

LT 0612 REV B • 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

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