Analog Devices Linear Technology DC2737A Guida rapida alla configurazione

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

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

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

QUICK START PROCEDURE

Figure 1. Proper Measurement Equipment Setup

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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

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

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

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

DC2737A

Monday, August 28, 2017 11

N/A

LT8301ES5

42VIN COMPACT ISOLATED FLYBACK CONVERTER

BZT52C5V6T-7

10uF

EFE-FTH100UAR

50V

210K

PMEG3020EH

1206

3.3nF

630V

R3 154K

1N4148WS

CMHZ5250B

1 2

WURTH, 750313974

4 6

4.7uF

50V

0805

VOUT-

VOUT+

100uF

6.3V

0805

LT8301ES5

VIN 5

EN/UV

RFB

GND

SW 4

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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

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