Analog Devices Linear Technology DC2737A Kurzanleitung zur Einrichtung
1
dc2737af
DEMO MANUAL DC2737A
DESCRIPTION
LT8301
42VIN Micropower Isolated Flyback
Converter with 65V/1.2A Switch
Demonstration circuit 2737A is an isolated flyback con-
verter featuring the LT
®
8301. The demo circuit outputs 5V
from input 10V to 32V, with a nominal 24V. The output
current capability increases with the input voltage. The
standby input current of the demo circuit is less than
950µA (typical) at VIN = 24V.
Table 1 summarizes the performance of the demo board
at room temperature. The demo circuit can be easily
modified and attached to a system board as the isolated
power supply for quick evaluation.
All registered trademarks and trademarks are the property of their respective owners.
PERFORMANCE SUMMARY
The LT8301 data sheet gives a complete description of
the part, operation and applications information. The data
sheet must be read in conjunction with this quick start
guide for demo circuit 2737A.
Design files for this circuit board are available at
http://www.linear.com/demo/DC2737A
Specifications are at TA= 25°C
Table 1
PARAMETER CONDITIONS MIN TYP MAX UNITS
Input Voltage 10 24 32 V
Standby Current IOUT = 0mA, VIN = 24V 950 µA
Output Voltage VIN = 12V to 32V
IOUT = 6mA to 700mA
4.75 5 5.25 V
Maximum Output Current VIN = 12V
VIN = 24V
700
1000
mA
mA
Output Voltage Ripple (Peak to Peak) VIN = 24V, IOUT = 1A 90 mV
Switching Frequency VIN = 24V, IOUT = 1A 190 kHz
Efficiency VIN = 24V, IOUT = 1A 83.2 %
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dc2737af
DEMO MANUAL DC2737A
QUICK START PROCEDURE
Demo circuit 2737A is easy to set up to evaluate the per-
formance of the LT8301. Refer to Figure 1 for proper
equipment setup and follow the procedure below.
1. With power off, connect the input power supply to the
board through V
IN
and GND terminals. Connect the load
to the terminals VOUT+and VOUT–on the board.
2. Turn on the power at the input. Increase VIN slowly to
10V.
3. Check for the proper output voltages. The output should
be regulated at 5V (±5%).
4. Once the proper output voltage is established, adjust
the input voltage and load current within the operat-
ing range and observe the output voltage regulation,
transient response, ripple voltage, efficiency and other
parameters.
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dc2737af
DEMO MANUAL DC2737A
PARTS LIST
ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER
Required Circuit Components
1 1 C1 CAP, X5R, 4.7µF, 50V, 10%, 0805 MURATA, GRM21BR61H475KE51L
2 1 C2 CAP, X5R, 100µF, 6.3V, 20%, 0805 MURATA, GRM21BR60J107ME15L
3 1 C6 CAP, ALUM, 10µF, 50V PANASONIC, EFE-FTH100UAR
4 1 C7 CAP, X7R, 3300pF, 630V, 10%, 1206 MURATA, GRM31BR72J332KW01L
5 1 D1 SCHOTTKY DIODE, 30V, 2A, SOD123F NXP, PMEG3020EH,115
6 1 D2 ZENER DIODE, 5.6V, SOD-523 DIODES, BZT52C5V6T-7-F
7 1 D3 DIODE, 1N4148WS SOD323 DIODES, 1N4148WS-7-F
8 1 D4 ZENER DIODE, 20V, 500mW, SOD123 CENTRAL, CMHZ5250B
10 1 R1 RES, CHIP, 1M, 1/10W, 1% 0603 VISHAY, CRCW06031M00FKEC
11 1 R2 RES, CHIP, 210k, 1/10W, 1% 0603 VISHAY, CRCW0603210KFKEA
12 1 R3 RES, CHIP, 154k, 1/10W, 1% 0603 VISHAY, CRCW0603154KFKEA
13 1 T1 TRANSFORMER, 750313974 WURTH, 750313974
14 1 U1 IC FLYBACK CONVERTER, SOT23-5 LINEAR TECH, LT8301ES5#PBF
Hardware: For Demo Board Only
9 5 E1, E2, E3, E4, E5 TESTPOINT, TURRET, 0.094" pbf MILL-MAX, 2501-2-00-80-00-00-07-0
15 4 MH1, MH2, MH3, MH4 STAND-OFF, NYLON 0.25" KEYSTONE, 8831(SNAP ON)
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dc2737af
DEMO MANUAL DC2737A
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
10V - 32V
NOTE: UNLESS OTHERWISE SPECIFIED
1. ALL RESISTORS AND CAPACITORS ARE 0603.
5.6V
0.7A@5V
GND
SIZE
DATE:
IC NO. REV.
SHEET OF
TITLE:
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.
www.linear.com
2
DC2737A
Monday, August 28, 2017 11
N/A
LT8301ES5
42VIN COMPACT ISOLATED FLYBACK CONVERTER
SIZE
DATE:
IC NO. REV.
SHEET OF
TITLE:
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.
www.linear.com
2
DC2737A
Monday, August 28, 2017 11
N/A
LT8301ES5
42VIN COMPACT ISOLATED FLYBACK CONVERTER
SIZE
DATE:
IC NO. REV.
SHEET OF
TITLE:
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.
www.linear.com
2
DC2737A
Monday, August 28, 2017 11
N/A
LT8301ES5
42VIN COMPACT ISOLATED FLYBACK CONVERTER
D2
BZT52C5V6T-7
12
+
C6
10uF
EFE-FTH100UAR
50V
R2
210K
D1
PMEG3020EH
12
E1
C7
1206
3.3nF
630V
R3 154K
D3
1N4148WS
12
D4
CMHZ5250B
1 2
T1
WURTH, 750313974
1
4 6
5
7
8
E2
4.7uF
50V
C1
0805
R1
1M
E4
VOUT-
E3
VOUT+
100uF
C2
6.3V
0805
U1
LT8301ES5
VIN 5
EN/UV
1
RFB
3
GND
2
SW 4
SW
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dc2737af
DEMO MANUAL DC2737A
LINEAR TECHNOLOGY CORPORATION 2017
LT 1017 • 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 application
engineer.
Mailing Address:
Linear Technology
1630 McCarthy Blvd.
Milpitas, CA 95035
Copyright © 2004, Linear Technology Corporation
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