Linear Technology DC1166A Guida rapida alla configurazione

dc1166af

DEMO MANUAL DC1166A

DESCRIPTION

LT3590

48V Buck-Mode LED Driver

Demonstration circuit 1166A is a 48V Buck-Mode LED

Driver featuring the LT

3590. The LT3590 is a fixed fre-

quency buck-mode converter specifically designed todrive

up to 10 LEDs in series from a 48V DC source. Series con-

nection of the LEDs provides identical LEDcurrents of up to

50mA, resulting in uniform brightness and eliminating the

need for ballast resistors. A fixed frequency current mode

architecture results in stable operation over a wide range

of input voltage and load condition. The high switching

frequency allows using tiny components for the circuit.

L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear

Technology Corporation. All other trademarks are the property of their respective owners.

PERFORMANCE SUMMARY

The LT3590 data sheet gives complete descriptions of the

part, operation and application information. The data sheet

must be read in conjunction with this quick start guide for

working on or modifying the demo circuit 1166A.

Design files for this circuit board are available at

http://www.linear.com/demo/DC1166A

Specifications are at TA= 25°C

DO NOT LOOK DIRECTLY AT OPERATING LED

WARNING!

This Circuit Produces Light that Can Damage Eyes.

SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS

VIN Input Supply Range 4.5 55 V

DMAX Maximum Duty Cycle 90 %

IQSHDN Quiescent Current in Shutdown VIN = 48V 15 20 µA

fSW Switching Frequency 650 850 1050 KHz

VREG VREG Pin Voltage 1mA Load on VREG Pin 3.1 3.3 3.5 V

EFF Efficiency VIN = 48V; VLED = 30V; ILED = 50mA 90 %

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dc1166af

DEMO MANUAL DC1166A

QUICK START PROCEDURE

Demonstration circuit 1166A is easy to set up to evalu-

ate the performance of the LT3590. Refer to Figure 1 for

proper measurement equipment setup and follow the

procedure below:

1. Place jumpers in the following positions:

JP1 ON

2. With power off, connect the input power supply to VIN

and GND.

3. With power off, connect LEDs to LED+ and LED–.

4. Turn on the power at the input.

NOTE: Make sure that the input voltage does not

exceed 55V.

5. Check for the proper output voltage and current.

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dc1166af

DEMO MANUAL DC1166A

Figure 1. Proper Measurement Equipment Setup

QUICK START PROCEDURE

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dc1166af

DEMO MANUAL DC1166A

PARTS LIST

ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER

Required Circuit Components

1 1 C1 CAP, 0805 0.47µF 10% 100V X7R MURATA GRM21BR72A474KA73BL

2 1 C2 CAP, 0805 1µF 10% 50V X7R MURATA GRM21BR71H105K

3 1 L1 INDUCTOR, 330µH COILCRAFT LPZ3010-334MR

4 1 R1 RES, 0402 4.02Ω 1% 1/16W VISHAY CRCW04024R02FKED

5 1 U1 IC, LT3590EDC LINEAR TECH. LT3590EDC

Additional Demo Board Circuit Components

1 2 C3, C4 CAP, 0402 0.1µF 10% 16V X5R AVX 0402YD104K

2 1 C5 CAP, 10µF 20% 100V ALUM SANYO 100CE10BS

3 1 JP1 HEADER, 3-PIN 0.100 SAMTEC TSW-103-26-L-S

4 1 JP1 SHUNT SAMTEC SNT-100-BK-G

5 1 R2 RES, 0402 100k 1% 1/16W VISHAY CRCW04021003FKED

6 1 R3 RES, 0402 10Ω 5% 1/16W VISHAY CRCW040210R0JNED

Hardware: For Demo Board Only

1 5 E1, E2, E3, E4, E5 TURRET MILL-MAX 2501-2-00-80-00-00-07-0

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dc1166af

DEMO MANUAL DC1166A

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

1 to 10 LEDS

4.5V - 55V

50mA

COILCRAFT

LPZ3010-334MR

3.3V, 1mA

REVISION HISTORY

DESCRIPTION DATE APPROVEDECO REV

PROD

A 06/29/07

REVISION HISTORY

DESCRIPTION DATE APPROVEDECO REV

PROD

A 06/29/07

REVISION HISTORY

DESCRIPTION DATE APPROVEDECO REV

PROD

A 06/29/07

Customer Notice:

Linear Technology has made a best effort to

design a circuit that meets customer-supplied specifications;

however, it remains the customers 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

Applications Engineering for assistance.

This circuit is proprietary to Linear Technology and supplied

for use with Linear Technology parts.

Customer Notice:

Linear Technology has made a best effort to

design a circuit that meets customer-supplied specifications;

however, it remains the customers 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

Applications Engineering for assistance.

This circuit is proprietary to Linear Technology and supplied

for use with Linear Technology parts.

Customer Notice:

Linear Technology has made a best effort to

design a circuit that meets customer-supplied specifications;

however, it remains the customers 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

Applications Engineering for assistance.

This circuit is proprietary to Linear Technology and supplied

for use with Linear Technology parts.

SIZE

SCALE:

CAGE CODE

DWG NO

REV

SHEET OF

FILENAME:

TITLE

CONTRACT NO.

APPROVALS

DATE

DRAWN

CHECKED

APPROVED

ENGINEER

DESIGNER

TECHNOLOGY

1630 McCarthy Blvd.

Milpitas, CA 95035

Phone: (408)432-1900

Fax: (408)434-0507

DC1166A

Wednesday, August 31, 2016

SCH, LT3590EDC, 48V BUCK-MODE LED DRIVER

MEI

06/29/07

1166A-A.DSN

SIZE

SCALE:

CAGE CODE

DWG NO

REV

SHEET OF

FILENAME:

TITLE

CONTRACT NO.

APPROVALS

DATE

DRAWN

CHECKED

APPROVED

ENGINEER

DESIGNER

TECHNOLOGY

1630 McCarthy Blvd.

Milpitas, CA 95035

Phone: (408)432-1900

Fax: (408)434-0507

DC1166A

Wednesday, August 31, 2016

SCH, LT3590EDC, 48V BUCK-MODE LED DRIVER

MEI

06/29/07

1166A-A.DSN

SIZE

SCALE:

CAGE CODE

DWG NO

REV

SHEET OF

FILENAME:

TITLE

CONTRACT NO.

APPROVALS

DATE

DRAWN

CHECKED

APPROVED

ENGINEER

DESIGNER

TECHNOLOGY

1630 McCarthy Blvd.

Milpitas, CA 95035

Phone: (408)432-1900

Fax: (408)434-0507

DC1166A

Wednesday, August 31, 2016

SCH, LT3590EDC, 48V BUCK-MODE LED DRIVER

MEI

06/29/07

1166A-A.DSN

JP1

ONOFF

JP1

ONOFF

VIN

LED-

LT3590EDC

CTRL

VIN 4

GND

VREG

6SW 3

LED 5

GND

LED+

330uH

1%100K

10uF

100V

OPT

10uF

100V

OPT

1uF 50V

1 2

0.1uF

1%4.02

0.47uF

100V

0.47uF

100V

CTRL

GND

0.1uF

VREG

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dc1166af

DEMO MANUAL DC1166A

Linear Technology Corporation

1630 McCarthy Blvd., Milpitas, CA 95035-7417

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

LT 0916 • 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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