1
dc1784bfa
DEMO MANUAL DC1784B
DESCRIPTION
LT3797EUKG
Triple LED Boost Controller
DC1784B is a triple boost LED driver featuring the LT3797
triple boost LED controller. It accepts an input voltage
from 2.5V to 40V (with higher transient) and drives three
independent strings of up to 50V LEDs at 1A. DC1784B
features independent PWM and analog dimming of each
of the three LED strings. Each of the three channels has
its own short-circuit protection, open LED protection, and
FAULT flag output.
Each or every channel can be altered to run as a different
topology such as buck-boost mode, buck mode, or SEPIC
depending upon the relationship between input and output
voltage. Although the boost is set up to power 50V of LEDs
at 1A, the maximum LED string voltage can be changed
to almost 100V and the LED current can be adjusted by
merely changing a few resistors and external components.
DC1784B features high efficiency at 310kHz switching
frequency. At high LED string voltages up to 50V and 1A
of LED current, the triple LED boost controller has 93.5%
efficiency. The switching frequency can be adjusted be-
tween 100kHz and 1MHz with a single resistor. All three
channels run in-phase with each other and an external
SYNC pin can be used to set the switching frequency and
phasing, as well as to optimize PWM dimming.
For low input voltage operation, down to 2.5V, the CTRL
pin voltage is reduced as the input voltage drops below
10.5V, reducing LED brightness and restraining the peak
switch currents in order to limit thermal rise on this PCB.
The LT3797 has a unique, internal buck-boost INTVCC
supply that powers the gate drivers at 7.8V, regardless
of the state of the input voltage, rather than using an LDO
from the input. UVLO turns the LEDs off when VIN drops
below 2.5V. Internal OVLO turns off the switching when
the input exceeds 41V, but OVLO can be programmed
externally to a lower voltage if desired. The LT3797 can
withstand transients up to 60V. DC1784A can withstand
transients up to 50V with C3 > 50V rating.
Small ceramic input and output capacitors are used to save
space and cost. The open LED overvoltage protection uses
the IC’s constant voltage regulation loop to regulate the
output to approximately 55V if the LED string is opened
although it may reach 59V peak during transient from
running LEDs to open. The unique FBH (feedback high)
pins allow the overvoltage protection of non-grounded
LED driver topologies such as buck-boost mode and buck
mode to be accomplished with just two resistors.
Modifications can be made to DC1784B in order to convert
the independent channels to higher or lower power or from
LED drivers to constant voltage regulators. They can easily
be changed from boost topology to SEPIC, buck mode, or
buck-boost mode LED drivers. Please consult the factory
or the LT3797 data sheet for details.
The LT3797 data sheet gives a complete description of
the device, operation and applications information. The
data sheet must be read in conjunction with this demo
manual for DC1784B. The LT3797EUKG is assembled in
a 52-lead (7mm × 8mm) plastic QFN UKG package with
a thermally enhanced ground pad. Proper board layout
is essential for maximum thermal performance. See the
data sheet section ‘Layout Considerations’.
Design files for this circuit board are available at
http://www.linear.com/demo/DC1784B
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Analog
Devices, Inc. All other trademarks are the property of their respective owners.
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dc1784bfa
DEMO MANUAL DC1784B
QUICK START PROCEDURE
DC1784B is easy to set up to evaluate the performance of
the LT3797EUKG. Follow the procedure below:
1. Connect three strings of LEDs that will run with forward
voltage less than 50V (at 1A), but greater than PVIN,
to the LED+ and GND terminals on the PCB as shown
in Figure 1.
2. Connect the EN/UVLO terminal to GND.
3. With power off, connect the input power supply to the
PVIN and GND terminals. Make sure that the PVIN DC
input voltage does not exceed 40V (or VLED).
4. Turn the input power supply on and make sure the
voltage is between 2.5V and 40V (or VLED).
5. Connect the PWM1-3 input terminals to INTVCC or VREF
to enable 100% brightness control when EN/UVLO is
released.
6. Release the EN/UVLO-to-GND connection.
7. Observe the LED strings running at the programmed
LED current.
8. To change the brightness with analog dimming, sim-
ply attach a voltage source on any or all of the CTRL
terminals and set the voltage(s) between 0V and 1.5V.
See data sheet for details.
9. To change brightness with PWM dimming, remove the
connection from PWM1-3 to INTVCC or VREF and attach
a 3.3V to 5V rectangular waveform with varying duty
cycle.
PERFORMANCE SUMMARY
PARAMETER CONDITIONS VALUE (TYPICAL)
Input Voltage PVIN Range Operating VIN = PVIN 2.5V to VLED (Up to 40V)
Switching Frequency R1 = 47.5k 310kHz
ILED CH1, CH2, CH3 R2, R3, R4 = 0.25Ω 10.5V < PVIN < VLED (40V) 1.0A
Low PVIN ILED (CTRL foldback) R2, R3, R4 = 0.25Ω PVIN = 4.0V
R2, R3, R4 = 0.25Ω PVIN = 6.0V
R2, R3, R4 = 0.25Ω PVIN = 9.0V
280mA
525mA
890mA
VLED Range CH1, CH2, CH3 R8, R9, R10 = 23.2k R14, R15, R16 = 1M PVIN < VLED < 50V
Open LED Voltage CH1, CH2, CH3 R8, R9, R10 = 23.2k R14, R15, R16 = 1M 55V
Typical Efficiency (100% PWM Duty Cycle) PVIN = 14V VLED = 50V and ILED = 1A CH1, CH2, CH3 93.5%
PVIN Under Voltage Lockout (Falling Turn-Off) R26 = 100k and R27 = 105k 2.5V
PVIN Under Voltage Lockout (Rising Turn-On) R26 = 100k and R27 = 105k 2.6V
INTVCC Operating 7.5V
Peak Switch Current Limit CH1, CH2, CH3 R11, R12, R13 = 0.008Ω 12.5A
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dc1784bfa
DEMO MANUAL DC1784B
DEMO CIRCUIT OPTIONS
DC1784B can be adjusted for higher output voltage, dif-
ferent LED current, or different topology. The following
options are for simple changes to the demonstration
circuit. The data sheet gives more information regarding
designing with the LT3797. For more information, see
the data sheet for details or contact Linear Technology
technical support.
Maximum LED Voltage
DC1784B is set for 55V of overvoltage protection and the
maximum LED string voltage used on the standard build
should be 50V. However, the output can go up to 100V,
so OVP can be set at about 93V for maximum LED voltage
and the maximum LED string voltage is therefore about
87V. The limits are based upon open LED overshoot and
voltage and current regulation regions. If changes are
made in the FB resistors for higher voltage, the MOSFET
and catch diode should be switched out for higher voltage
devices. See the LT3797 data sheet for details.
Current or Voltage Regulation
The LT3797 can be used for constant current or voltage
regulation. If the load placed on the LED+ to GND terminals
allows VOUT to climb high enough for VISP-FBH = 1.2V, then
the voltage regulation loop of the converter takes over. In
this case, the compensation for a given channel should be
adjusted for proper use as a constant voltage regulator.
The IC can be used as a boost or SEPIC constant voltage
regulator. Output voltage can be almost as high as 100V
when used as a constant voltage regulator.
LED Current and Switch Current
LED current on DC1784B is set for 1A with 0.25Ω resis-
tors R2, R3, R4. For a different maximum LED current,
change this resistor:
250mV/RLED = ILED.
A change in LED current or input voltage may lead to higher
or lower maximum switch current. R11, R12, R13 can be
changed to alter the maximum switch current for different
applications. 100mV/RSENSE = peak switch current.
Overvoltage Protection
Overvoltage protection is set with resistor pairs R8 & R14,
R9 & R15, R10 & R16. The high side feedback method
allows simple changes for different topologies.
For buck mode and buck-boost mode, see the data sheet
for details how to set the feedback resistors. Note that
R35, R36, R37 are provided as optional placeholders on
the demo circuit for simple feedback resistor changes for
these topologies.
BOOST, BUCK MODE, BUCK-BOOST MODE, SEPIC
Any channel of the DC1784B can be changed to a differ-
ent topology than boost. A few simple changes including
feedback overvoltage protection feedback resistors, out-
put resistor, components, and connection to input can
be made. Please consult the LT3797 data sheet and the
factory for details.
Undervoltage and Overvoltage Lockout
UVLO can be adjusted by changing the values of R26
and R27.
The LT3797 has an internal 41V OVLO that protects the IC
from switching at high input voltage transients. However,
an additional OVLO pin can be used to set a lower OVLO
using resistors R28, R31, and/or R46.
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DEMO MANUAL DC1784B
DEMO CIRCUIT OPTIONS
Figure 1. Test Procedure Setup Drawing for DC1784B
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dc1784bfa
DEMO MANUAL DC1784B
Figure 2. DC1784B 12VIN 100Hz PWM Dimming Waveforms at Different PWM Duty Cycles with 250:1 in Bold.
ILED Waveform (500mA/Div) Is on Top (with 50V LED String) and IL1 Waveform (2A/Div) Is on the Bottom
Figure 3. DC1784B CTRL LED Current Foldback at Low PVIN with UVLO Falling and Rising
Figure 4. DC1784B Efficiency at Maximum ILED vs PVIN with 50V LEDs (at 1A) on All Three Channels
DEMO CIRCUIT OPTIONS
250:1
ILED
IL1
0
0.2
0.4
0.6
0.8
1
0 2 4 6 8 10 12 14
ILED (A)
PVIN (V)
TURN-ON
(RISING)
30 32 34 36 38 40 42
OVLO
(RISING)
TURN-ON
(FALLING)
UVLO
(FALLING)
80
82
84
86
88
90
92
94
96
98
100
0 5 10 15 20 25 30 35 40 45
EFFICIENCY (%)
PVIN (V)
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dc1784bfa
DEMO MANUAL DC1784B
PARTS LIST
ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER
Required Circuit Components
1 1 C1 Cap., X7R, 1µF, 50V, 10%, 0805 MURATA, GRM21BR71H105KA12L
2 6 C2, C3, C4, C31, C32, C33 Cap., X7R, 4.7µF, 50V, 10%, 1210 MURATA, GRM32ER71H475KA88L
3 9 C5, C6, C7, C19, C20, C21, C25,
C27, C29
Cap., X7S, 4.7µF, 100V, 20%, 1210 TDK C3225X7S2A475M
4 4 C8, C13, C14, C15 Cap., X7R, 0.1µF, 10V, 10%, 0603 AVX, 0603ZC104KAT2A
5 1 C9 Cap., X5R, 10µF, 10V, 20%, 0603 SAMSUNG CL10A106MP8NNNC
6 3 C10, C11, C12 Cap., X7R, 6800pF, 25V, 10%, 0402 AVX, 04023C682KAT2A
7 3 D1, D2, D3 DIODE, PDS360, POWERDI-5 DIODES/ZETEX, PDS360-13
8 3 L1, L2, L3 IND, 10µH, HC9-100-R COILTRONICS, HC9-100-R
9 1 L4 IND., 47µH, SD SERIES, IND-SD25 COILTRONICS, SD25-470-R
10 3 M1, M3, M5 Mosfet, N-Channel, BSC039N06NS, PWRPAK SO-8 INFINEON, BSC039N06NS
11 3 M2, M4, M6 Mosfet, P-Channel, SI7415DN, PWRPAK1212-8 VISHAY, SI7415DN-T1-GE3
12 1 R1 RES., CHIP, 47.5k, 1/16W, 1%, 0402 VISHAY, CRCW040247K5FKED
13 3 R2, R3, R4 RES., CHIP, 0.25Ω, 1W, 1%, 2010 IRC, LRC-LR2010LF-01-R250-F
14 3 R5, R6, R7 RES., CHIP, 3.9k, 1%, 0402 VISHAY, CRCW04023K90FKED
15 3 R8, R9, R10 RES., CHIP, 23.2k, 1/16W, 1%, 0402 VISHAY, CRCW040223K2FKED
16 3 R11, R12, R13 RES., CHIP, 0.008Ω, 1W, 1%, 2010 SEI, CSRF2010FT8L00
17 3 R14, R15, R16 RES., CHIP, 1M, 1/10W, 1%, 0603 VISHAY, CRCW06031M00FKEA
18 1 U1 IC, LT3797EUKG QFN(52)(UKG)-7mm × 8mm LINEAR TECH.CORP. LT3797EUKG#PBF
Optional Electrical Components
1 0 C16, C17, C18, C22, C23, C24 CAP., OPT 0402 OPT
2 0 C26, C28, C30, C34, C35, C36 CAP., OPT 1210 OPT
3 1 C37 Cap., ALUM, 33µF, 50V, 6.3 × 7.7 PANASONIC, EEHZA1H330XP
4 3 D4, D5, D6 DIODE, PMEG6010CEJ NXP, PMEG6010CEJ
5 3 R17, R18, R19 RES., CHIP, 1M, 1/16W, 1%, 0402 VISHAY, CRCW04021M00FKED
6 3 R20, R21, R22 RES., CHIP, 140k, 1/16W, 1%, 0402 VISHAY, CRCW0402140KFKED
7 3 R23, R24, R25 RES., CHIP, 100k, 1/10W, 1%, 0603 VISHAY, CRCW0603100KFKEA
8 1 R26 RES., CHIP, 100k, 1/16W, 1% , 0402 VISHAY, CRCW0402100KFKED
9 1 R27 RES., CHIP, 105k, 1/16W, 1% , 0402 VISHAY, CRCW0402105KFKED
10 1 R28 RES., CHIP, 0Ω, 0402 VISHAY, CRCW04020000Z0ED
11 1 R29 RES., CHIP, 0Ω, 1/4W, 1% , 1206 VISHAY, CRCW12060000Z0EA
12 1 R30 RES., CHIP, 0Ω, 1/10W, 1%, 0603 VISHAY, CRCW06030000Z0EA
13 0 R31 to R34, R46 RES., OPT, 0402 OPT
14 0 R35 to R45 RES., OPT, 0603 OPT
Hardware
1 7 E2, E10, E11, E12, E16, E17, E18 TESTPOINT, TURRET 0.094" MILLMAX, 2501-2-00-80-00-00-07-0
2 20 E4 to E9, E13 to E15, E19 to E29 TESTPOINT, TURRET 0.064" MILL-MAX, 2308-2-00-80-00-00-07-0
3 2 J1, J2 CONNECTOR, BANANA JACK KEYSTONE, 575-4
7
dc1784bfa
DEMO MANUAL DC1784B
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
DD
C C
BB
A A
DC1784B
EN/UVLO
LED1+
LED2+
LED3+
OVLO
CTRL1
CTRL2
CTRL3
INTVCC
FLT1
FLT2
FLT3
SYNC
OUT1
OUT2
OUT3
PWM1
PWM2
PWM3
GND
GND
GND
UP TO 50V LED 1A
GND
VIN
PVIN
GND
GND
GND
GND
2.5V - 40V
SD25-470-R
0603 0603 0603
0603 0603 0603 0603 0603
0603 0603 0603
0603
0603
0603
0603
UP TO 50V LED 1A
UP TO 50V LED 1A
310kHz
OUT1 LED2+
OUT2
PVIN
OUT2
OUT3
OUT1
VIN
LED3+
LED1+
OUT3
PVIN
PVIN
PVIN
PVIN
PVIN
PVIN
INTVCC
PVINPVIN PVIN
REF
INTVCC
REF
PVIN
PVIN
PVIN
REVISION HISTORY
DESCRIPTION DATEAPPROVEDECO REV
KEITH S.
REBUILD CHANGES 61-31-71
__
REVISION HISTORY
DESCRIPTION DATEAPPROVEDECO REV
KEITH S.
REBUILD CHANGES 61-31-71
__
REVISION HISTORY
DESCRIPTION DATEAPPROVEDECO REV
KEITH S.
REBUILD CHANGES 61-31-71
__
SIZE
DATE:
.VER.ON CI
SHEET OF
TITLE:
APPROVALS
PCB DES.
APP ENG.
TECHNOLOGY Fax: (408)434-0507
Milpitas, CA 95035
Phone: (408)432-1900
1630 McCarthy Blvd.
LTC Confidential-For Customer Use Only
CUSTOMER NOTICE
LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A
CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS;
HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO
VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL
APPLICATION. COMPONENT SUBSTITUTION AND PRINTED
CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT
PERFORMANCE OR RELIABILITY. CONTACT LINEAR
TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE.
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SCHEMATIC
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
SCALE = NONE
www.linear.com
1
Wednesday, July 13, 2016
1 1
TRIPLE LED BOOST CONTROLLER
JW
KEITH S.
N/A
LT3797EUKG
SIZE
DATE:
.VER.ON CI
SHEET OF
TITLE:
APPROVALS
PCB DES.
APP ENG.
TECHNOLOGY Fax: (408)434-0507
Milpitas, CA 95035
Phone: (408)432-1900
1630 McCarthy Blvd.
LTC Confidential-For Customer Use Only
CUSTOMER NOTICE
LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A
CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS;
HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO
VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL
APPLICATION. COMPONENT SUBSTITUTION AND PRINTED
CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT
PERFORMANCE OR RELIABILITY. CONTACT LINEAR
TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE.
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SCHEMATIC
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
SCALE = NONE
www.linear.com
1
Wednesday, July 13, 2016
1 1
TRIPLE LED BOOST CONTROLLER
JW
KEITH S.
N/A
LT3797EUKG
SIZE
DATE:
.VER.ON CI
SHEET OF
TITLE:
APPROVALS
PCB DES.
APP ENG.
TECHNOLOGY Fax: (408)434-0507
Milpitas, CA 95035
Phone: (408)432-1900
1630 McCarthy Blvd.
LTC Confidential-For Customer Use Only
CUSTOMER NOTICE
LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A
CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS;
HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO
VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL
APPLICATION. COMPONENT SUBSTITUTION AND PRINTED
CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT
PERFORMANCE OR RELIABILITY. CONTACT LINEAR
TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE.
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SCHEMATIC
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
SCALE = NONE
www.linear.com
1
Wednesday, July 13, 2016
1 1
TRIPLE LED BOOST CONTROLLER
JW
KEITH S.
N/A
LT3797EUKG
R6
3.9K
R40
OPT
E27
C9
10uF
10V
D4
PMEG6010CEJ
12
E19
R3
.25
2010
E10
C6
4.7uF
100V
1210
R29
0
1206 C2
4.7uF
50V
1210
C27
C35
OPT
1210
C24
OPT
E20
C34
OPT
1210
R18
1M
R2
.25
2010
C19
E28
R45
OPT
0603
M2
SI7415DN
2
4
7
3
16
8
5
R41
OPT
0603
R5
3.9K
D3
PDS360
12
3
R30
0
R21
140K
M4
SI7415DN
2
4
7
3
16
8
5
R36
OPT
0603
R35
OPT
0603
R27
105K
E16
C33
C18
OPT
C8
0.1uF
C32
R23
100K
E29
R31
OPT
E5
R33
OPT
C22
OPT
E2
R14
1M
R13
0.008
2010 R8
23.2K
M3
BSC039N06NS
2
4
7
3
1 6
8
5
C23
OPT
R28
0
J1
R1
47.5K
E6
R12
0.008
2010
C15
0.1uF
R46
OPT
L1
10uH
C12
6.8nF
C29
E23 E11
D5
PMEG6010CEJ
12
C1
1uF
50V
0805
E7
R7
3.9K
L4
47uH
C25
D6
PMEG6010CEJ
12
R44
OPT
0603
R38
OPT
C4
4.7uF
50V
1210
E17
C31
L3
10uH
R11
0.008
2010
E8
C10
6.8nF
C20
R17
1M
R42
OPT
0603
E24 R43
OPT
0603
C7
4.7uF
100V
1210
R24
100K
R20
140K
C5
4.7uF
100V
1210
E9
C36
OPT
1210
E21
C3
4.7uF
50V
1210
R37
OPT
0603
R34
OPT
R39
OPT
E25
E12
D1
PDS360
12
3
M6
SI7415DN
2
4
7
3
16
8
5
R10
23.2K
M1
BSC039N06NS
2
4
7
3
1 6
8
5
C21
C16
OPT
D2
PDS360
1
2
3
R4
.25
2010
C13
0.1uF
R19
1M
E13
C17
OPT
E18
E22
R25
100K
R9
23.2K
R16
1M
C30
OPT
1210
+
C37
33uF
50V
R22
140K
E26
M5
BSC039N06NS
2
4
7
3
1 6
8
5
R15
1M
E14
E4
C11
6.8nF
C26
OPT
1210
R26
100K
L2
10uH
E15
J2
C14
0.1uF
R32
OPT
U1
LT3797EUKG
FLT1
1
FLT2
2
FLT3
3
PWM1 4
PWM2 5
PWM3 6
REF
7
CTRL1
8
CTRL2
9
CTRL3
10
RT
11
SYNC
12
TG1 14
ISN115
ISP116
FBH1 17
VC1
19
SS1
20
SENSEN121
SENSEP122
GATE1 23
GATE2 24
SENSEP225
SENSEN226
SS2
27
VC2
28
FBH2 30
ISP231
ISN232
TG2 33
TG3 35
ISN336
ISP337
FBH3 38
VC3
40
SS3
41
SENSEN342
SENSEP343
GATE3 44
INTVCC
45
INTVCC
46
SW2 47
BOOST 48
SW1 49
VIN
50
EN/UVLO
51
OVLO
52
GND
53
C28
1210
OPT
8
dc1784bfa
DEMO MANUAL DC1784B
LINEAR TECHNOLOGY CORPORATION 2014
LT 0317 REV A • PRINTED IN USA
DEMONSTRATION BOARD IMPORTANT NOTICE
Linear Technology Corporation (LT C ) 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 LT C 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 LT C 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. LT C assumes no liability for applications assistance,
customer product design, software performance, or infringement of patents or any other intellectual property rights of any kind.
LT C 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 LT C applica-
tion engineer.
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1630 McCarthy Blvd.
Milpitas, CA 95035
Copyright © 2004, Linear Technology Corporation
