DC1739A-B - Demo Manual

DEMO MANUAL DC1739A-B
LTC3765/LTC3766
150W High Efficiency Active Clamp
Forward Converter
DESCRIPTION
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, efficiency, and small solution size attainable using 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 applications. It has an eighth-brick footprint size of 0.90" × 2.3".
PERFORMANCE SUMMARY
Synchronous rectification helps to attain efficiency exceeding 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
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.
(TA = 25°C)
SYMBOL
PARAMETER
CONDITIONS
VIN
Input Supply Range
VOUT
Output Voltage
IOUT
Output Current Range, Continuous
200LFM
IOUT
Output Current , Peak
200LFM
fSW
Switching (Clock) Frequency
MIN
TYP
18
MAX
72
12.0
0
UNITS
V
V
11
12.5
A
A
240
kHz
mVP–P
VOUT P-P
Output Ripple
VIN = 48V, IOUT = 12A (20MHz BW)
60
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
Approximate Size
Component Area × Top Component Height
1500
2.3 × 0.9 × 0.47
VDC
Inches
OPERATING PRINCIPLES
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 accomplished, 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
1
DEMO MANUAL DC1739A-B
OPERATING PRINCIPLES
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 eliminates delays, 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 stability. This may require a damping impedance. (See Linear
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 currents in the filter.
QUICK START PROCEDURE
Demonstration circuit 1739 is easy to set up to evaluate the performance of the LTC3765/LTC3766. Refer to
Figure 1 for proper measurement equipment setup and
follow the procedure below:
NOTE. When measuring the output voltage ripple, care must
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. Direct an airflow of 200LFM across the unit for sustained
operation at full load.
3. With power off, connect the supply to the input terminals
+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.
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, connect 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 are desired, an ammeter or
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 of measuring 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
2
DEMO MANUAL DC1739A-B
QUICK START PROCEDURE
Figure 1. Proper Measurement Equipment Setup
DC1739A-B Efficiency
95
14
12
10
93
8
6
92
POWER DISSIPATION (W)
EFFICIENCY ( %)
94
4
Eff, 24VIN
Eff, 48VIN
PD, 24VIN
PD, 48VIN
91
90
2
0
2
4
6
8
10
12
IOUT (A)
dc1739a F02
Figure 2. Efficiency and Power Dissipation
dc1739afb
3
DEMO MANUAL DC1739A-B
QUICK START PROCEDURE
Figure 3. Output Ripple at 48VIN and 11AOUT (50mV, 2μs/DIV, 20MHz)
IOUT
VOUT
Figure 4. Transient Response Waveform at 48VIN and 6 – 12AOUT (5A, 500mV, 100μs/DIV)
dc1739afb
4
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
5
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
RES., CHIP, 61.9k, 1/8W, 1%, 0805
VISHAY, CRCW080561K9FKEA
Required Circuit Components
44
1
R17
dc1739afb
6
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
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
VISHAY, CRCW06030000Z0EA
0
Q8
TRANSISTOR OPT NPN SOT323
38
8
R9, R21, R30-R33, R45, R54
0Ω Jumper 0402
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
VISHAY, CRCW04020000Z0ED
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
7
A
B
C
5
R48
4.99K
R17
61.9K
0805
-VIN
18 to 72 VIN
C1
33uF
100V
C28
10nF
+
C23
1uF
0805
11 RCORE
13 SSFLT
12 RUN
3 VCC
C3,C4,C5
2.2uF x3
100V
1210
C29 R51
33nF 13.3K
Q6
FDC2512
D3
ZHCS400
C2
2.2uF
100V
1210
VIN
R18
100K
0805
1nF
C16
R19
100
U1
LTC3765EMSE
R52
22K
R20
100
R14
0.006
2512
4
C30
1nF
C31
1nF
100
R39
R38
100
C22
220pF
AS
C20
0.1uF
R25
10K
Q5
IRF6217
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.
R53
8.25K
AG 4
ISMAG 5
IN- 16
IN+ 15
C17
0.1uF
D5
ZHCS400
Q1
FDMS86201
C13
1.0uF
100V
1210
C24
T3
1T
4
6
R29
RS-
FG
C6
47pF
200V
1206
1.82K
1206
R22
0.004
2512
R10
R1
51.1
1206
RS+
R37
909
0805
R7
909
0805
3
FG
2
1
0.1uF
C35
C10
1nF
630V
1206
C25
33nF
COG
0805
2
Fsw=240KHz
R44
56.2K
VCC
LTC3766EGN
VCC
+
C18
470pF
R46 R47
60.4K 15.0K
C32
47pF
1
FB 6
VS- 13
VS+ 12
C33
2.2nF
R41
4.12K
-VOUT
1
-VOUT
R50
R49
1.87K 604
R56
1.00K
C37
1.0nF
12V / 12.5A
+VOUT
R35
R36
1.82K 11.5K
-VOUT
C8,C9
68uF x2
16V
+VOUT
RSRS+
R24
R23
100
100
0402
0402
C11,C12
22uF x2
16V
1210
10uF
16V
1206
C27
R4,R5
68.1K x2 = 34K
1206
+VOUT Q7
FMMT491A
Q4
FDMS86200
ES1PD
D1
L4
8.0uH
U2
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
+VOUT
25 PT-
19.1K
-VOUT
C21 26
PT+
1uF
0805
2.2nF -VOUT
250V
1812
1.25T
3
1
5
4T
3
4
4T
2
Q3
FDMS86322
D4
ES1PD
R11
75
0805
R27
0.75 AS
0805
C14
0.1uF
1206
7
4T
T1
RUN
8
11
9
VIN
2
SS
L1
1.5uH
FGD/SWB 20
REGSD
16
3
SW 23
GND
14
+VIN
NDRV 14
FS/UV
10
VSEC 3
27
FG 2
PGND
SG 1
PHASE
5
VAUX 24
10
VIN 22
IPK
D
GND2
1
NDRV 21
MODE
4
4
FS/SYNC
15
PG 2
GND
17
9
19
VCC 28
SGD
IS- 7
PGND
IS- 17
ITH
7
IS+ 8
DELAY
6
IS+ 18
VSOUT
8
11
5
A
B
C
D
DEMO MANUAL DC1739A-B
SIMPLE SCHEMATIC DIAGRAM
dc1739afb
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 representation that the interconnection of its circuits as described herein will not infringe on existing patent rights.
A
B
C
-VIN
E2
J2
18 to 72 VIN
+
5
R48
4.99K
R17
61.9K
0805
C1
33uF
100V
C2
2.2uF
100V
1210
PG
C28
10nF
PGNDP
C23
1uF
0805
3
OPT
0402
R12
R18
100K
0805
PG
R13
OPT
0402
0603
1nF
C16
R19
100
0
0402
R9
SGNDP
4
PGNDP
Q8
OPT
4
R20
100
R14
0.006
2512
U1
LTC3765EMSE
R52
22K
R15 OPT
SGNDP SGNDP
C36
OPT
0402
R51
13.3K
11 RCORE
13 SSFLT
12 RUN
VIN
C5
2.2uF
100V
1210
3 VCC
C4
2.2uF
100V
1210
C29
33nF
Q6
FDC2512
D3
ZHCS400
C3
2.2uF
100V
1210
VIN
C31
1nF
SGNDP
C30
1nF
100
R39
R38
100
C22
220pF
C14
0.1uF
1206
Q5
IRF6217
AS
C20
0.1uF
R25
10K
4
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.
R53
8.25K
ISMAG 5
IN- 16
IN+ 15
D5
ZHCS400
SGNDP
PGNDP
C17
0.1uF
123
Q1
FDMS86201
Q2
OPT
5678
AG 4
J1
6
5
2
1
4
5
6
7
8
C13
1.0uF
100V
1210
7
4T
11
5
4T
3
4
4T
2
6
C24
T3
1T
4
6
PGND
R29
0
R40
R1
RS+
R30
0
0402
R37
909
0805
R7
909
0805
51.1 1206
3
321
8765
RS-
R31
0
0402
FG
R32
0
0402
2
ES1PD
D1
L4
8.0uH
1
R33
0
0402
PGND
VAUX
R28
OPT
0402
C15
OPT
50V
Q4
4 FDMS86200
SGND PGND
R42
OPT
C25
C26
33nF 0ohms
COG
0805
PGND
2
VA
OPT
D6
Fsw=240KHz
R44
56.2K
R43
OPT
0402
C11
22uF
16V
1210
C12
22uF
16V
1210
OPT
L5
VCC
R46 R47
60.4K 15.0K
PGND
C34
OPT
1206
VAUX
+
C8
68uF
16V
C18
470pF
R26
OPT
0603
C32
47pF
VPK
C33
2.2nF
R41
4.12K
VCC
1
0
0402
R54
E4
J4
J3
E3
+VOUT
SGND
R56
1.00K
C37
1.0nF
-VOUT
12V / 12.5A
+VOUT
R50
R49
1.87K 604
R35
R36
1.82K 11.5K
68uF
16V
+ C9
+VOUT
1
C27
10uF
16V
1206
PGND
FB 6
VS- 13
VS+ 12
RSRS+
R24
R23
100
100
0402
0402
PGND
C35
0.1uF
VCC
VPK
R45
0
0402
LTC3766EGN
R5
68.1K
1206
C10
1nF
630V
1206
0402 Q7
FMMT491A
R21
0
R4
68.1K
1206
U2
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
+VOUT
25 PT-
1.82K
1206
R22
0.004
2512
RS- R10
4
FG
C7
OPT
0805
C6
47pF
200V
1206
19.1K
SGND
C21 26
PT+
1uF
0805
321
8765
PGNDP 2.2nF PGND
250V
1812
1.25T
3
1
VA
Q3
FDMS86322
D4
ES1PD
R11
75
0805
R27
0.75 AS
0805
1
2
3
1
8
T1
RUN
L1
1.5uH
SS
9
E1
REGSD
16
+VIN
VSEC 3
2
FS/SYNC
15
3
SGD
19
4
IS- 17
ITH
7
D
FS/UV
10
NDRV 14
17
FGD/SWB 20
14
PG 2
GND
9
SW 23
GND
FG 2
PGND
27
SG 1
PHASE
5
VAUX 24
10
VIN 22
IPK
IS+ 8
GND2
PGND
1
NDRV 21
MODE
4
IS- 7
DELAY
6
VCC 28
IS+ 18
VSOUT
11
5
A
B
C
D
DEMO MANUAL DC1739A-B
FULL SCHEMATIC DIAGRAM
dc1739afb
9
DEMO MANUAL DC1739A-B
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 application engineer.
Mailing Address:
Linear Technology
1630 McCarthy Blvd.
Milpitas, CA 95035
Copyright © 2004, Linear Technology Corporation
dc1739afb
10 Linear Technology Corporation
LT 0612 REV B • PRINTED IN USA
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900
●
FAX: (408) 434-0507 ● www.linear.com
© LINEAR TECHNOLOGY CORPORATION 2011
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