DC2001A - Demo Manual

DEMO MANUAL DC2001A
LTC3787EUFD
4-Phase High Current
Synchronous
Step-Up Converter
Description
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 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.
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.
Design files for this circuit board are available at
http://www.linear.com/demo
Performance Summary
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.
Specifications are at TA = 25°C
PARAMETER
CONDITIONS
Minimum Input Voltage
IOUT = 0A to 25A
UNITS
6V
Maximum Input Voltage
IOUT = 0A to 30A
24V
Output Voltage
VIN = 6V to 24V, MODE = FCC
Default Operating Frequency
FREQ = GND
Efficiency
VIN = 18V, VO = 24V, IO = 30A
24V ±2%
350kHz
98.2%
dc2001af
1
DEMO MANUAL DC2001A
Quick Start Procedure
Demonstration circuit 2001A is easy to set up to evaluate the performance of the LTC3787. Refer to Figure 1
for proper measurement equipment setup and follow the
procedure below.
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.
1. Set the jumper as follows:
JP1:
FCC
JP2:
ON
6. Turn on the load and adjust as necessary.
Optional
2. With all power off, connect the input power supply,
load, and meters using heavy duty cables, as shown in
Figure 1.
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.
NOTE: Input supply must be capable of at least 65A at
12V, or 110A at 6V.
3. For power good indication, monitor PGOOD.
3. Preset the system load to 0A and the input supply to
12V, 2A current limit.
4. For external clock synchronization, connect the clock
source to CLKIN and remove jumper JP1.
–
VOUT LOAD
–
VOUT
A
+
+
IOUT
+
–
VIN
A
+
IIN
dc2001a F01
VIN SUPPLY
–
Figure 1. Proper Measurement Equipment Setup
2
dc2001af
DEMO MANUAL DC2001A
Quick Start Procedure
100
VIN = 18V
98
VIN = 12V
VIN = 9V
96
VIN = 6V
Efficiency (%)
94
92
90
88
86
84
82
80
0
5
10
15
20
25
Load Current (A)
30
35
dc2001a F02
Figure 2. Efficiency Curves, fSW = 350kHz, MODE = FCC
dc2001af
3
DEMO MANUAL DC2001A
Parts List
ITEM
QTY
REFERENCE
PART DESCRIPTION
MANUFACTURER/PART NUMBER
Required Circuit Components
1
32
CAP, X7R, 22µF, 20%, 25V, 1812
CIN1A-CIN4A, CIN1B-CIN4B, CIN7ACIN10A, CIN7B-CIN10B, COUT1A-COUT2A,
COUT1B-COUT2B, COUT4A-COUT5A,
COUT4B-COUT5B, COUT7A-COUT8A,
COUT7B-COUT8B, COUT10A-COUT11A,
COUT10B-COUT11B
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, RES, 0Ω, JUMPER, 0603
R29-R30, R33, R37-R38, R40, R42-R44
4
0
Q1B, Q3B, Q5B, Q7B
VISHAY, CRCW06030000Z0EA
XSTR, MOSFET N-CHAN OPTIONAL
dc2001af
4
DEMO MANUAL DC2001A
Parts List
ITEM
QTY
REFERENCE
PART DESCRIPTION
MANUFACTURER/PART NUMBER
HEADER, 4-PIN, 2mm
SULLINS, NRPN041PAEN-RC
Hardware: For Demo Board Only
2
1
JP1
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
5
A
B
C
JP2
RUN
E12
JP1
3
2
1
4
3
2
1

R15

R22
38.3K
1%
R25
12.1K
1%
10K
R19
10K

R47
OPT
R46
OPT
C5
10pF

C6
OPT
0
R9
OPT

R7
C3
C1
0.01uF
0
R23
10
R20
R17 10
4
R27
0
10pF
C15








C13
R28
12.1K
1%
10pF
C12
OPT
SENSE2+
8
7
6
232K 1%
R24
C10
0.01uF
C8
0.1uF
4
3
2
1

OPT
SGND 5
0.01uF
C32
1. ALL CAPACITORS AND RESISTORS ARE 0603.
[2] - FOR VIN < VOUT ONLY
[3] - SURGE VOLTAGE UP TO 30V
5
10
R6
10


R14 0
0
R12






NOTES: UNLESS OTHERWISE SPECIFIED,
OFF
ON
RUN



E9
E5
MODE
CLKIN
PHASMD



R29
0

22.1K
R26
15
16
17
18
19
20
21
D2
C16
1000pF
C14

3

0.1uF

C7
2.2
C9
4.7uF
25V
0805
BAS140W
C4
1uF
16V
OPT
R11
4
123
4
COUT2A
22uF
25V
1812
5
4
4
COUT1B
22uF
25V
1812
5


C:\DESIGN\20\2001A-1\2001A-1.DSN
2
L1
1.0uH



MI/RB

0.003
2512
RSNS4
RSNS3
CIN2B
22uF
25V
1812

CIN3B
22uF
25V
1812
CIN3A
22uF
25V
1812

N/A

TECHNOLOGY
DATE
GND
GND
GND
VIN 
6V - 24V
VIN+
JOSHUA Y.
APPROVED
GND
GND
GND
VOUT 
24V / 12VIN
TO 30A
VOUT+
GND
EXTVCC
E17
E16
E15
E14
E19
E13
E8
E10
E11
E6
330uF
35V
E4
+ CIN6
E3
E18
E2
06/11/12


 


OPT
R16
OPT
R13
330uF
35V
+ CIN5
VOUT


CIN4B
22uF
25V
1812
CIN4A
22uF
25V
1812
PROD
1
 1
LTC3787EUFD
DEMO CIRCUIT 2001A
01/02/13 12:20:49

 2
1

HIGH CURRENT 4-PHASE SYNCHRONOUS
BOOST CONVERTER
 
1
REVISION HISTORY
DESCRIPTION
MASTER
COUT6
+
330uF
35V

CIN1B
22uF
25V
1812

COUT3
330uF
35V
CIN2A
22uF
25V
1812
+

1
REV
CIN1A
22uF
25V
1812
SER2010-102ML
COILCRAFT
COUT2B
22uF
25V
1812
Q1B 1 2 3
OPT
5
0.003
2512
ECO
COUT5B
22uF
25V
1812
RSNS2
RSNS1

COUT4B
22uF
25V
1812
Q2B
BSC014N04LSI
123
Q4B
BSC014N04LSI
123
5
SER2010-102ML
COILCRAFT

COUT1A
22uF
25V
1812
4
5
123
123
4
COUT5A
22uF
25V
1812
L2
1.0uH
COUT4A
22uF
25V
1812
2


 






0
R21
Q1A
BSC014N04LSI
0
R18
Q2A
BSC014N04LSI

4
123
Q3B
5
OPT
Q4A
BSC014N04LSI 5
0

5
123

R10

4
BAS140W
D1
0
R4
Q3A
BSC014N04LSI
3
R8
0.01uF
C11
0.1uF







22
C2
0.1uF
R1
100K




10
R5
SENSE1+

11

R3
OPT
E1
26
12
D

9
PGOOD

R2
OPT

SENSE1-
28

27

24


25

23


13
4



14
6
29
5
A
B
C
D
DEMO MANUAL DC2001A
Schematic Diagram
dc2001af
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 representation that the interconnection of its circuits as described herein will not infringe on existing patent rights.
A
B
C
CLKOUT

E7
100
R36
5
R49
OPT
R48
OPT
C22
10pF



C20
OPT

10
R41
R39 10
0
R38


SENSE4+
4
C28
OPT









8
7
6
SGND 5
C26
0.01uF
SENSE4-
C24
0.1uF
0.01uF
C33
R37 0
3
2
1
OPT
C18
SENSE3-


10
R32
C17
0.01uF
4

0
R44
R42
0
10pF
C29
9

R45
22.1K
15
16
17
18
19
20
0.01uF
C31
1000pF
C30
C27
0.1uF







21
22
C19
0.1uF

10



R31 10
11

 


D
SENSE3+
12
27

26

13
28


25

23

24


14
4

29
5
D4



3
4
Q5A
4
COUT10A
22uF
25V
1812
4
5
4
4
COUT11A
22uF
25V
1812
123
5
123
4
Q8B
BSC014N04LSI
SER2010-102ML
COILCRAFT
5


COUT11B
22uF
25V
1812


2

MI/RB


COUT10B
22uF
25V
1812
5
L3
1.0uH


COUT12
330uF
35V

N/A

CIN9B CIN10B
22uF
22uF
25V
25V
1812
1812

1
CIN9A CIN10A
22uF
22uF
25V
25V
1812
1812
330uF
35V
330uF
35V
1
 2
LTC3787EUFD
DEMO CIRCUIT 2001A
12/17/12 06:13:00

 2
1

HIGH CURRENT 4-PHASE SYNCHRONOUS
BOOST CONVERTER
TECHNOLOGY
+ CIN12
+ CIN11


 


SLAVE
 
+

0.003
2512
RSNS8
RSNS7
CIN8B
22uF
25V
1812
CIN8A
22uF
25V
1812
COUT9
330uF
35V
CIN7A
22uF
25V
1812
+



CIN7B
22uF
25V
1812
0.003
2512
RSNS6
RSNS5
COUT8B
22uF
25V
1812
SER2010-102ML
COILCRAFT
Q6B
BSC014N04LSI
123
123
5
2
COUT7B
22uF
25V
1812
L4
1.0uH
COUT8A
22uF
25V
1812
Q5B 1 2 3
OPT
COUT7A
22uF
25V
1812

0
R43
BSC014N04LSI
0
R40
Q6A
BSC014N04LSI

0
5
123
123
Q7B 5
OPT
Q8A
BSC014N04LSI
R33
4
123
5








0.1uF

C23
2.2
OPT
R35
R34
C25
4.7uF
25V
0805
BAS140W
C21
1uF
16V

4

BAS140W
D3
0
R30
Q7A
BSC014N04LSI
3
A
B
C
D
DEMO MANUAL DC2001A
Schematic Diagram
dc2001af
7
DEMO MANUAL DC2001A
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
dc2001af
8
Linear Technology Corporation
LT 0113 • PRINTED IN USA
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900
●
FAX: (408) 434-0507 ● www.linear.com
 LINEAR TECHNOLOGY CORPORATION 2013
Similar pages