Linear Technology DC2001A Quick setup guide

dc2001af

DEMO MANUAL DC2001A

Description

LTC3787EUFD

4-Phase High Current

Synchronous

Step-Up Converter

Demonstration circuit 2001A is a step-up DC/DC converter

using two LTC3787EUFD dual-phase synchronous boost

controllers in a parallel configuration for high current, high

power 4-phase operation.

The DC2001A has an input supply voltage range from

6V to 24V. The converter provides an output voltage of

24V, with a very high efficiency output of 25A to 30A, as

shown in Figure 2.

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

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

owners.

performance summary

The LTC3787 data sheet gives a complete description

of the part, operation and application information, and

must be read in conjunction with this demo manual for

the DC2001A.

Design files for this circuit board are available at

http://www.linear.com/demo

PARAMETER CONDITIONS UNITS

Minimum Input Voltage IOUT = 0A to 25A 6V

Maximum Input Voltage IOUT = 0A to 30A 24V

Output Voltage VIN = 6V to 24V, MODE = FCC 24V ±2%

Default Operating Frequency FREQ = GND 350kHz

Efficiency VIN = 18V, VO= 24V, IO= 30A 98.2%

Specifications are at TA= 25°C

dc2001af

DEMO MANUAL DC2001A

Quick start proceDure

Demonstration circuit 2001A is easy to set up to evalu-

ate the performance of the LTC3787. Refer to Figure 1

for proper measurement equipment setup and follow the

procedure below.

1. Set the jumper as follows:

JP1: FCC

JP2: ON

2. With all power off, connect the input power supply,

load, and meters using heavy duty cables, as shown in

Figure 1.

NOTE: Input supply must be capable of at least 65A at

12V, or 110A at 6V.

3. Preset the system load to 0A and the input supply to

12V, 2A current limit.

4. Turn on the supply and adjust the voltage to the desired

value, up to 24V, while monitoring the output.

NOTE: Do not exceed 33V input.

5. Once the proper output voltage has been established,

increase the current limit as necessary.

6. Turn on the load and adjust as necessary.

Optional

1. For pulse skip or Burst Mode

operation, set jumper

JP1 to PS or BM.

2. To shut down switching, set jumper JP2 to OFF.

3. For power good indication, monitor PGOOD.

4. For external clock synchronization, connect the clock

source to CLKIN and remove jumper JP1.

Figure 1. Proper Measurement Equipment Setup

–

–dc2001a F01

VOUT

VIN

VOUT LOAD

IOUT

VIN SUPPLY

IIN

dc2001af

DEMO MANUAL DC2001A

Quick start proceDure

Figure 2. Efficiency Curves, fSW = 350kHz, MODE = FCC

100

0 5 10 15 20 25 30 35

Efﬁciency (%)

Load Current (A)

VIN = 6V

VIN = 9V

VIN = 12V

VIN = 18V

dc2001a F02

dc2001af

DEMO MANUAL DC2001A

parts List

ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER

Required Circuit Components

1 32 CIN1A-CIN4A, CIN1B-CIN4B, CIN7A-

CIN10A, CIN7B-CIN10B, COUT1A-COUT2A,

COUT1B-COUT2B, COUT4A-COUT5A,

COUT4B-COUT5B, COUT7A-COUT8A,

COUT7B-COUT8B, COUT10A-COUT11A,

COUT10B-COUT11B

CAP, X7R, 22µF, 20%, 25V, 1812 TDK, C4532X7R1E226M

2 8 CIN5-CIN6, CIN11-CIN12, COUT3, COUT6,

COUT9, COUT12

CAP, 330µF, 20%, 35V, ELECT NIPPON CHEMI-CON,

EMZA350ADA331MJA0G

3 8 C1, C10, C16-C17, C26, C31-C33 CAP, X7R, 0.01µF, 5%, 25V, 0603 AVX, 06033C103JAT2A

4 8 C2, C7-C8, C11, C19, C23-C24, C27 CAP, X7R, 0.1µF, 10%, 25V, 0603 TDK, C1608X7R1E104K

5 2 C4, C21 CAP, X7R, 1µF, 10%, 16V, 0603 TAIYO YUDEN, EMK107BJ105KA-T

6 5 C5, C13, C15, C22, C29 CAP, NPO, 10pF, 5%, 25V, 0603 AVX, 06033A100JAT2A

7 2 C9, C25 CAP, X5R, 4.7µF, 20%, 25V, 0805 TAIYO YUDEN, TMK212BJ475MG-T

8 2 C14, C30 CAP, NPO, 1000pF, 5%, 25V, 0603 AVX, 06033A102JAT2A

9 4 D1-D4 DIODE, SCHOTTKY, 30V, SOD123 INFINEON, BAS140W

10 4 L1-L4 IND, 1.0µH COILCRAFT, SER2010-102MLB

11 12 Q1A-Q8A, Q2B, Q4B, Q6B, Q8B XSTR, MOSFET N-CHANNEL INFINEON, BSC014N04LSI

12 1 R1 RES, 100k, 5%, 1/10W, 0603 VISHAY, CRCW0603100KJNEA

13 8 R5-R6, R17, R20, R31-R32, R39, R41 RES, 10Ω, 5%, 1/10W, 0603 VISHAY, CRCW060310R0JNEA

14 2 R11, R35 RES, 2.2Ω, 5%, 1/10W, 0603 VISHAY, CRCW06032R20JNEA

15 2 R15, R19 RES, 10k, 5%, 1/10W, 0603 VISHAY, CRCW060310K0JNEA

16 1 R22 RES, 38.3k, 1%, 1/10W, 0603 VISHAY, CRCW060338K3FKEA

17 1 R24 RES, 232k, 1%, 1/10W, 0603 VISHAY, CRCW0603232KFKEA

18 2 R25, R28 RES, 12.1k, 1%, 1/10W, 0603 VISHAY, CRCW060312K1FKEA

19 2 R26, R45 RES, 22.1k, 1%, 1/10W, 0603 VISHAY, CRCW060322K1FKEA

20 1 R36 RES, 100Ω, 5%, 1/10W, 0603 VISHAY, CRCW0603100RJNEA

21 8 RSNS1-RSNS8 RES, 0.003Ω, 1%, 1W, 2512 PANASONIC, ERJM1WSF3M0U

22 2 U1, U2 IC, LTC3787EUFD#PBF LINEAR TECHNOLOGY, LTC3787EUFD#PBF

Additional Demo Board Circuit Components

1 0 C3, C6, C12, C18, C20, C28 CAP, OPTIONAL, 0603

2 0 R2, R3, R7, R10, R13, R16, R34, R46-R49 RES, OPTIONAL, 0603

3 18 R4, R8-R9, R12, R14, R18, R21, R23, R27,

R29-R30, R33, R37-R38, R40, R42-R44

RES, 0Ω, JUMPER, 0603 VISHAY, CRCW06030000Z0EA

4 0 Q1B, Q3B, Q5B, Q7B XSTR, MOSFET N-CHAN OPTIONAL

dc2001af

DEMO MANUAL DC2001A

parts List

ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER

Hardware: For Demo Board Only

2 1 JP1 HEADER, 4-PIN, 2mm SULLINS, NRPN041PAEN-RC

3 1 JP2 HEADER, 3-PIN, 2mm SULLINS, NRPN031PAEN-RC

8 2 JP1, JP2 SHUNT SAMTEC, 2SN-BK-G

1 11 E1-E2, E5, E7-E13, E17 TURRET MILL-MAX, 2501-2-00-80-00-00-07-0

4 8 E3-E4, E6, E14-E16, E18-E19 STUD, TEST PIN PEM, KFH-032-10

6 8 E3-E4, E6, E14-E16, E18-E19 LUG RING, #10 KEYSTONE, 8205

7 8 E3-E4, E6, E14-E16, E18-E19 WASHER, #10 TIN PLATED BRASS ANY #10 EXT BZ TN

5 16 E3-E4, E6, E14-E16, E18-E19 (×2) NUT, BRASS 10-32 ANY #10-32

9 4 MH1, MH2, MH3, MH4 STANDOFF, SNAP-ON KEYSTONE, 8834

dc2001af

DEMO MANUAL DC2001A

schematic Diagram

D D

C C

B B

A A

[2] - FOR VIN < VOUT ONLY

[3] - SURGE VOLTAGE UP TO 30V

MASTER





NOTES: UNLESS OTHERWISE SPECIFIED,

1. ALL CAPACITORS AND RESISTORS ARE 0603.

SENSE1-

VOUT

SENSE2+

SENSE1+

SGND

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TECHNOLOGY

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01/02/13 12:20:49

HIGH CURRENT 4-PHASE SYNCHRONOUS

MI/RB



N/A

LTC3787EUFD

DEMO CIRCUIT 2001A

C:\DESIGN\20\2001A-1\2001A-1.DSN

BOOST CONVERTER

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TECHNOLOGY

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







01/02/13 12:20:49

HIGH CURRENT 4-PHASE SYNCHRONOUS

MI/RB



N/A

LTC3787EUFD

DEMO CIRCUIT 2001A

C:\DESIGN\20\2001A-1\2001A-1.DSN

BOOST CONVERTER

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

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TECHNOLOGY

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



































01/02/13 12:20:49

HIGH CURRENT 4-PHASE SYNCHRONOUS

MI/RB



N/A

LTC3787EUFD

DEMO CIRCUIT 2001A

C:\DESIGN\20\2001A-1\2001A-1.DSN

BOOST CONVERTER

REVISION HISTORY

DESCRIPTION DATE APPROVEDECO REV

JOSHUA Y.

PROD

106/11/12

REVISION HISTORY

DESCRIPTION DATE APPROVEDECO REV

JOSHUA Y.

PROD

106/11/12

REVISION HISTORY

DESCRIPTION DATE APPROVEDECO REV

JOSHUA Y.

PROD

106/11/12

PHASMD

C32

0.01uF

C32

0.01uF

VIN+

CIN4B

22uF

25V

1812

CIN4B

22uF

25V

1812

VIN

6V - 24V

VIN

6V - 24V

R17 10R17 10

0.1uF

BAS140W

R46

OPT

R46

OPT

COUT5B

22uF

25V

1812

COUT5B

22uF

25V

1812

R15

10K

R15

10K

Q3B

OPT

Q3B

OPT

R28

12.1K

R28

12.1K

JP1







MODE

JP1







MODE

OPT

CLKIN

CIN3A

22uF

25V

1812

CIN3A

22uF

25V

1812

RSNS1

2512

RSNS1

2512

R29

R47

OPT

R47

OPT

COUT1B

22uF

25V

1812

COUT1B

22uF

25V

1812

R23

C12

OPT

C12

OPT

Q2A

BSC014N04LSI

Q2A

BSC014N04LSI

RSNS3RSNS3

0.1uF

R20

C11

0.1uF

C11

0.1uF

CIN6

330uF

35V

CIN6

330uF

35V

Q1A

BSC014N04LSI

Q1A

BSC014N04LSI

E10

EXTVCC

E10

EXTVCC

Q2B

BSC014N04LSI

Q2B

BSC014N04LSI

RSNS2

0.003

RSNS2

0.003

COUT5A

22uF

25V

1812

COUT5A

22uF

25V

1812

OPT

COUT3

330uF

35V

COUT3

330uF

35V

CIN3B

22uF

25V

1812

CIN3B

22uF

25V

1812

C14

1000pF

C14

1000pF

E14

TO 30A

VOUT

24V / 12VIN

E14

TO 30A

VOUT

24V / 12VIN

R24

232K 1%

R24

232K 1%



































































R27

R13

OPT

R13

OPT

0.1uF

Q3A

BSC014N04LSI

Q3A

BSC014N04LSI

E16

GND

E16

GND

COUT1A

22uF

25V

1812

COUT1A

22uF

25V

1812

R21

COUT2B

22uF

25V

1812

COUT2B

22uF

25V

1812

CIN5

330uF

35V

CIN5

330uF

35V

10pF

OPT

GND

Q4B

BSC014N04LSI

Q4B

BSC014N04LSI

C15

10pF

C15

10pF

R26

22.1K

R26

22.1K

1uF

16V

1uF

16V

E15

GND

E15

GND

R14 0R14 0

E11

GND

E11

GND

R19

10K

R19

10K

E17

GND

E17

GND

Q4A

BSC014N04LSI

Q4A

BSC014N04LSI

R10

OPT

R10

OPT

100K

1.0uH

COILCRAFT

SER2010-102ML

1.0uH

COILCRAFT

SER2010-102ML

C13

10pF

C13

10pF

CIN1B

22uF

25V

1812

CIN1B

22uF

25V

1812

JP2

OFF

RUN

JP2

OFF

RUN

R22

38.3K

R22

38.3K

E13

VOUT+

E13

VOUT+

GND

E12

RUN

E12

RUN

COUT6

330uF

35V

COUT6

330uF

35V

OPT

R16

OPT

R16

OPT

Q1B

OPT

Q1B

OPT

C16

0.01uF

C16

0.01uF

COUT4B

22uF

25V

1812

COUT4B

22uF

25V

1812

C10

0.01uF

C10

0.01uF

CIN2B

22uF

25V

1812

CIN2B

22uF

25V

1812

RSNS4

0.003

2512

RSNS4

0.003

2512

R25

12.1K

R25

12.1K

CIN2A

22uF

25V

1812

CIN2A

22uF

25V

1812

R12

R18

0.01uF

BAS140W

OPT

PGOOD

CIN4A

22uF

25V

1812

CIN4A

22uF

25V

1812

CIN1A

22uF

25V

1812

CIN1A

22uF

25V

1812

GND

E18E18

E19E19

4.7uF

25V

0805

4.7uF

25V

0805

COUT2A

22uF

25V

1812

COUT2A

22uF

25V

1812

R11

2.2

R11

2.2

1.0uH

COILCRAFT

SER2010-102ML

1.0uH

COILCRAFT

SER2010-102ML

COUT4A

22uF

25V

1812

COUT4A

22uF

25V

1812

dc2001af

DEMO MANUAL DC2001A

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

SLAVE

SENSE4+

SENSE3+

SENSE3-

SENSE4-

SGND



























































 

 









TECHNOLOGY







































12/17/12 06:13:00

HIGH CURRENT 4-PHASE SYNCHRONOUS

MI/RB



N/A

LTC3787EUFD

DEMO CIRCUIT 2001A

BOOST CONVERTER





 

 









TECHNOLOGY







































12/17/12 06:13:00

HIGH CURRENT 4-PHASE SYNCHRONOUS

MI/RB



N/A

LTC3787EUFD

DEMO CIRCUIT 2001A

BOOST CONVERTER





 

 









TECHNOLOGY







































12/17/12 06:13:00

HIGH CURRENT 4-PHASE SYNCHRONOUS

MI/RB



N/A

LTC3787EUFD

DEMO CIRCUIT 2001A

BOOST CONVERTER

C19

0.1uF

C19

0.1uF

BAS140W

R48

OPT

R48

OPT



































































R42

C18

OPT

C18

OPT

R43

Q7B

OPT

Q7B

OPT

C33

0.01uF

C33

0.01uF

Q5B

OPT

Q5B

OPT

R45

22.1K

R45

22.1K

CIN10A

22uF

25V

1812

CIN10A

22uF

25V

1812

R40

RSNS7

0.003

2512

RSNS7

0.003

2512

R35

2.2

R35

2.2

RSNS5

2512

RSNS5

2512

COUT11A

22uF

25V

1812

COUT11A

22uF

25V

1812

BAS140W

C27

0.1uF

C27

0.1uF

COUT10B

22uF

25V

1812

COUT10B

22uF

25V

1812

COUT8B

22uF

25V

1812

COUT8B

22uF

25V

1812

R41

CIN7B

22uF

25V

1812

CIN7B

22uF

25V

1812

C25

4.7uF

25V

0805

C25

4.7uF

25V

0805

R38

R32

R30

R36

100

R36

100

COUT7A

22uF

25V

1812

COUT7A

22uF

25V

1812

RSNS8RSNS8

Q7A

BSC014N04LSI

Q7A

BSC014N04LSI

R33

COUT12

330uF

35V

COUT12

330uF

35V

CLKOUT

R37 0

Q8A

BSC014N04LSI

Q8A

BSC014N04LSI

CIN11

330uF

35V

CIN11

330uF

35V

Q6A

BSC014N04LSI

Q6A

BSC014N04LSI

COUT9

330uF

35V

COUT9

330uF

35V

C22

10pF

C22

10pF

C20

OPT

C20

OPT

C31

0.01uF

C31

0.01uF

COUT8A

22uF

25V

1812

COUT8A

22uF

25V

1812

COUT11B

22uF

25V

1812

COUT11B

22uF

25V

1812

CIN7A

22uF

25V

1812

CIN7A

22uF

25V

1812

Q5A

BSC014N04LSI

Q5A

BSC014N04LSI

C29

10pF

C29

10pF

R44

1.0uH

COILCRAFT

SER2010-102ML

1.0uH

COILCRAFT

SER2010-102ML

R39 10R39 10

C30

1000pF

C30

1000pF

C28

OPT

C28

OPT

Q8B

BSC014N04LSI

Q8B

BSC014N04LSI

CIN10B

22uF

25V

1812

CIN10B

22uF

25V

1812

R34

OPT

R34

OPT

Q6B

BSC014N04LSI

Q6B

BSC014N04LSI

C26

0.01uF

C26

0.01uF

CIN12

330uF

35V

CIN12

330uF

35V

1.0uH

COILCRAFT

SER2010-102ML

1.0uH

COILCRAFT

SER2010-102ML CIN8A

22uF

25V

1812

CIN8A

22uF

25V

1812

COUT10A

22uF

25V

1812

COUT10A

22uF

25V

1812

C17

0.01uF

C17

0.01uF

C21

1uF

16V

C21

1uF

16V

CIN9B

22uF

25V

1812

CIN9B

22uF

25V

1812

R49

OPT

R49

OPT

C24

0.1uF

C24

0.1uF

RSNS6

0.003

RSNS6

0.003

COUT7B

22uF

25V

1812

COUT7B

22uF

25V

1812

R31 10R31 10

CIN9A

22uF

25V

1812

CIN9A

22uF

25V

1812

CIN8B

22uF

25V

1812

CIN8B

22uF

25V

1812

C23

0.1uF

C23

0.1uF

dc2001af

DEMO MANUAL DC2001A

Linear Technology Corporation

1630 McCarthy Blvd., Milpitas, CA 95035-7417

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

 LINEAR TECHNOLOGY CORPORATION 2013

LT 0113 • PRINTED IN USA

DEMONSTRATION BOARD IMPORTANT NOTICE

Linear Technology Corporation (LT C ) 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 LT C 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 LT C 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.

LT C 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 LT C 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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