Linear Technology DC1816B Guide de configuration rapide

dc1816bfc

DEMO MANUAL DC1816B

Description

LT3799-1

Offline Isolated Flyback LED

Driver with PFC

Demonstration circuit 1816B is an off-line isolated flyback

LEDdriverfeaturingLT

3799-1.Thedemoboardprovides

a single constant current output of 3A over an LED string

voltage from 22V to 38V. It is optimized to operate over

a wide AC input voltage range (90VAC to 305VAC, 47Hz

to 63Hz). LED current typically stays within ±5% over the

whole input voltage range. It provides a high power factor

(>0.9) enabling a single design to be used worldwide. It

is also designed to comply with the IEC 61000-3-2 Class

C harmonics standard and the EN55015B conducted EMI

standard.

The LT3799-1 controls an isolated flyback converter in

boundary mode. Its novel current sensing scheme deliv-

ers a well-regulated output current to the secondary side

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

without using an opto-coupler. Open- and shorted-LED

protection ensures long term reliability.

The LT3799-1 is available in a low profile, thermally-

enhanced 16-lead MSOP package.

The LT3799-1 data sheet gives a complete description

of the device, operation and application information. The

data sheet must be read in conjunction with this quick

start guide for demo circuit 1816B.

Design files for this circuit board are available at

http://www.linear.com/demo

(TA= 25°C)

PARAMETER CONDITIONS MIN TYP MAX UNITS

Input Voltage Range Line Frequency, 47Hz to 63Hz 90 277 305 VAC

Output Current IOUT VIN = 120VAC, VLED = 36V 3 A

Output Voltage 22 36 38 V

Open LED Voltage (Note 1) 45 V

Note 1: For applications with low LED string voltage, FB pin divider resistor R4 and output clamp Z3 can be adjusted to reduce the open voltage limit.

See “Protection from Open LED and Shorted LED Faults” section in the data sheet for detail.

dc1816bfc

DEMO MANUAL DC1816B

Quick start proceDure

Figure 1. Proper Measurement Equipment Setup

IMPORTANT NOTE TO CUSTOMERS

HIGHVOLTAGESAREPRESENTEDONTHEDEMOCIRCUIT,

AND CAN LEAD TO LETHAL INJURIES TO HUMAN BODY.

ONLY QUALIFIED PERSONNEL SHOULD OPERATE IT. IT

ISSTRONGLYRECOMMENDEDTOUSESAFETYGLASSES

AND AN ISOLATION TRANSFORMER.

NOTE.IMPROPERCOMPONENTSREPLACEMENTONTHE

DEMOCIRCUITCANCAUSEPERFORMANCEDETERIORA-

TIONS, CIRCUIT MALFUNCTION, PROPERTY DAMAGE,

AND EVEN LIFE-THREATENING INJURIES. CONTACT

LINEAR TECHNOLOGY APPLICATIONS ENGINEERS FOR

PROPER COMPONENT REPLACEMENT.

Demonstration circuit 1816B is easy to set up to evalu-

ate the performance of the LT3799-1. Refer to Figure 1

for proper measurement equipment setup and follow the

procedure below:

1. Connect a 3A LED string with forward voltage less

than 38V, but greater than 22V, between LED+and

LED–terminals.

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

(L) input and neutral (N) input.

3. Turn on the power at the input.

NOTE. Make sure that the input voltage does not exceed

the maximum input voltage (305VAC).

4. Check for the proper output current.

Once the proper output currents are established, adjust the

inputvoltageand/ortheloadandobservetheoutputcurrent

regulation, efficiency, power factor and other parameters.

dc1816bfc

DEMO MANUAL DC1816B

Quick start proceDure

Figure 5. VIN = 120VAC Figure 6. VIN = 277VAC

Figure 7. VIN = 120VAC Figure 8. VIN = 277VAC

Input Line Voltage and Current

Switch Node Voltage

Figure 2. Efficiency vs Input Voltage Figure 4. Power Factor vs Input Voltage

Figure 3. IOUT vs Input Voltage

VIN (AC-RMS)

EFFICIENCY (%)

110 130 150 170 190 210 230 250 270 290 305

DC1816B F02

100

VIN (AC-RMS)

ILED (A)

110 130 150 170 190 210 230 250 270 290

DC1816B F03

3.0

4.0

2.0

2.5

3.5

305

VIN (AC-RMS)

POWER FACTOR

0.92

110 130 150 170 190 210 230 250 270 290

DC1816B F04

0.96

1.00

0.90

0.94

0.98

305

DC1816B F05

VIN AC

200V/DIV

IIN AC

1A/DIV

5ms/DIV DC1816B F06

VIN AC

200V/DIV

IIN AC

1A/DIV

5ms/DIV

DC1816B F07

VSW

100V/DIV

5µs/DIV DC1816B F08

VSW

100V/DIV

5µs/DIV

dc1816bfc

DEMO MANUAL DC1816B

Quick start proceDure

Output Voltage and Switch Node Voltage During Output Open

Output Current and Switch Node Voltage During Output Short

Figure 9. VIN = 120VAC Figure 10. VIN = 277VAC

Figure 11. VIN = 120VAC Figure 12. VIN = 277VAC

DC1816B F09

IC VIN

20V/DIV

VOUT

20V/DIV

VSW

200V/DIV

500ms/DIV DC1816B F10

IC VIN

20V/DIV

VOUT

20V/DIV

VSW

200V/DIV

500ms/DIV

DC1816B F11

IC VIN

20V/DIV

IOUT

5A/DIV

VSW

200V/DIV

500ms/DIV DC1816B F12

IC VIN

20V/DIV

IOUT

5A/DIV

VSW

200V/DIV

500ms/DIV

dc1816bfc

DEMO MANUAL DC1816B

parts List

ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER

Required Circuit Components

1 1 C1 CAP, 0.47µF 20% 310V POLYPROPYLENE VISHAY BFC33820474

2 1 C2 CAP, 0.47µF 20% 450V FILM RUBYCON 450MMK474K

3 1 C3 CAP, 22µF 20% 35V ALUM NIC NRSZ220M35V5X11F

4 1 C6 CAP, 0603 10nF 10% 50V X7R AVX 06035C103KAT2A

5 1 C7 CAP, 0603 0.1µF 10% 50V X7R AVX 06035C104KAT2A

6 1 C8 CAP, 0805 4.7µF 20% 16V X5R AVX 0805YD475MAT2A

7 1 C9 CAP, 2220 10µF 20% 100V X7S TDK C5750X7S2A106M

8 2 C10, C11 CAP, 1000µF 20% 63V ELEC PANASONIC EEU-FC1J102

9 1 C13 CAP, 1210 2.2nF 5% 630V U2J MURATA GRM32A7U2J222JW31D

10 1 C20 CAP, 2.2nF 10% Y5B TYPE “Y1” VISHAY 440LD22-R

11 1 C21 CAP, 0603 4.7pF ±0.1pF 50V NP0 AVX 06035A4R7CAT2A

12 4 D1, D2, D3, D4 DIODES, RECTIFIER 1.0A DIODES INC. 1N4005-T

13 2 D5, D6 DIODE, FAST SWITCHING DIODES INC. BAV20W-7-F

14 1 D7 DIODE, ULTRA FAST RECOVERY SILICON RECTIFIER CENTRAL SEMI.CMR1U-10M

15 1 D8 DIODE, SUPER BARRIER RECTIFIER 10A DIODES INC. SBR10U300CT

16 1 D9 DIODE, RECOVERY RECTIFIER CENTRAL SEMI.CMR1U-02M

17 1 F1 FUSE, FAST ACTING 3.15A BUSSMAN SS-5H-3.15A-APH

18 2 L1,L2 IND, 10mH COMMON MODE CHOKE SUMIDA LF2628NP-103

19 1 L3 IND, 150µH LINE CHOKE WÜRTH ELECTRONIK 7447018

20 1 Q1 XSTR, COOL MOS POWER TRANSISTOR INFINEON SPP17N80C3

21 2 R1, R2 RES, 1206 249k 1% 1/4W VISHAY CRCW1206249KFKEA

22 2 R3, R18 RES, 0603 100k 5% 1/10W VISHAY CRCW0603100KJNEA

23 1 R4 RES, 0603 4.32k 1% 1/10W VISHAY CRCW06034K32FKEA

24 1 R5 RES, 0603 20Ω 5% 1/10W VISHAY CRCW060320R0JNEA

25 1 R6 RES, 2512 200k 5% 1W VISHAY CRCW2512200KJNEG

26 1 R7 RES, 0603 2k 5% 1/10W VISHAY CRCW06032K00JNEA

27 1 R8 RES, 1206 0.015Ω 1% 1/4W VISHAY WSL1206R0150FEA

28 1 R9 RES, 1206 10k 1% 1/4W VISHAY CRCW120610K0FKEA

29 2 R10, R11 RES, 1206 499k 1% 1/4W VISHAY CRCW1206499KFKEA

30 1 R12 RES, 0603 3.09k 1% 1/10W VISHAY CRCW06033K09FKEA

31 1 R19 RES, 0603 40.2k 1% 1/10W NIC NRC06F4222TRF

32 1 R20 RES, 0603 16.9k 1% 1/10W VISHAY CRCW060316K9FKEA

33 1 R21 RES, 0603 0Ω JUMPER VISHAY CRCW06030000Z0EA

34 1 R25 RES, 0603 17.8Ω 1% 1/10W VISHAY CRCW060317R8FKEA

35 1 T1 XFMR, FLYBACK WÜRTH ELECTONIK 750811351

36 1 U1 IC, OFFLINE ISOLATED LED CONTROLLER LINEAR TECH. LT3799EMSE-1

37 1 V1 VARISTOR, 385V RMS 13.5MM RADIAL SEI CV385K10B

38 1 Z2 DIODE, TRANSIENT VOLTAGE SUPPRESSOR DIODES INC. SMBJ130(C)A-13-F

39 1 Z3 DIODE, TRANSIENT VOLTAGE SUPPRESSOR DIODES INC. SMCJ40(C)A-13-F

40 1 Z4 DIODE, TRANSIENT VOLTAGE SUPPRESSOR LITTELFUSE INC. SMCJ220CA

dc1816bfc

DEMO MANUAL DC1816B

parts List

ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER

Additional Demo Board Circuit Components

1 0 C14 CAP, 1206 100pF 5% 1000V U2J MURATA GRM31A7U3A101JW31D

2 0 D10 DIODE, ULTRA FAST RECOVERY SILICON RECTIFIER CENTRAL SEMI. CMR1U-10M

3 0 R13 RES, 1206 10k 1% 1/2W VISHAY CRCW120610K0JNEAHP

4 0 R22 RES, 0603

Hardware—For Demo Board Only

1 2 HS1, HS2 HEAT SINK, TO-220 AAVID THERMALLOY 529802B02500G

2 2 J1, J2 TERMINAL BLOCK, 2 POSITION WEIDMULLER 1715250000

3 1 NUT, TIN PLATE#4-40 ANY, #4-40

4 1 WASHER, #4, FLAT WASHER ANY

5 1 SCREW, 4/40 X 3/8 ANY, 4/40 X 3/8, PHILIPS SCREW

6 1 NUT, TIN PLATE# 2-56 ANY, #2-56

7 1 WASHER, #2, FLAT WASHER ANY

8 1 SPACER, NYLON SHOULDER KEYSTONE, 3051

9 1 SCREW, 2-56 X 3/8 ANY, 2-56 X 3/8 PHILIPS SCREW

10 1 THERMAL PAD BERGQUIST, SP600-58

11 1 SILICONE HEAT SINK RAWN

12 1 FAB, PRINTED CIRCUIT BOARD DEMO CIRCUIT 1816B

13 1 STENCIL STENCIL DC1816B

dc1816bfc

DEMO MANUAL DC1816B

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

dc1816bfc

DEMO MANUAL DC1816B

Linear Technology Corporation

1630 McCarthy Blvd., Milpitas, CA 95035-7417

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

 LINEAR TECHNOLOGY CORPORATION 2011

LT 0413 REV C • PRINTED IN USA

DEMONSTRATION BOARD IMPORTANT NOTICE

Linear Technology Corporation (LT C) provides the enclosed product(s) under the following AS IS conditions:

Thisdemonstration board (DEMO BOARD)kitbeingsold or providedbyLinearTechnologyisintendedfor 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. 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.

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 applica-

tion engineer.

Mailing Address:

Linear Technology

1630 McCarthy Blvd.

Milpitas, CA 95035

X-ON Electronics

Largest Supplier of Electrical and Electronic Components

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