5
dc1602af
DEMO MANUAL DC1602A
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
5
4
3
2
1
D D
C C
B B
A A
1. ALL RESISTORS ARE IN OHMS, 0603.
ALL CAPACITORS ARE IN MICROFARADS, 0603.
NOTE: UNLESS OTHERWISE SPECIFIED
*
6V - 36V
20A @ 6V
*
*
- SEE QUICK START GUIDE
CONSTANT VOLTAGE SYNCHRONOUS BUCK CONTROLLER
GND
GND
1-6-16WALKER B.REBUILD CHANGED Q1,Q2,Q32-1
VIN
VIN
VIN
REVISION HISTORY
DESCRIPTION DATEAPPROVEDECO REV
WALKER B.
PRODUCTION2 02-02-10
__
REVISION HISTORY
DESCRIPTION DATEAPPROVEDECO REV
WALKER B.
PRODUCTION2 02-02-10
__
REVISION HISTORY
DESCRIPTION DATEAPPROVEDECO REV
WALKER B.
PRODUCTION2 02-02-10
__
SIZE
DATE:
IC NO. REV.
SHEET OF
TITLE:
APPROVALS
PCB DES.
APP ENG.
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.
SCALE = NONE
www.linear.com
2-1
Thursday, January 07, 2016
HIGH POWER CONSTANT CURRENT,
A.K.
WALKER B.
N/A
LT3741EFE
DEMO CIRCUIT 1602A
SIZE
DATE:
IC NO. REV.
SHEET OF
TITLE:
APPROVALS
PCB DES.
APP ENG.
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.
SCALE = NONE
www.linear.com
2-1
Thursday, January 07, 2016
HIGH POWER CONSTANT CURRENT,
A.K.
WALKER B.
N/A
LT3741EFE
DEMO CIRCUIT 1602A
SIZE
DATE:
IC NO. REV.
SHEET OF
TITLE:
APPROVALS
PCB DES.
APP ENG.
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.
SCALE = NONE
www.linear.com
2-1
Thursday, January 07, 2016
HIGH POWER CONSTANT CURRENT,
A.K.
WALKER B.
N/A
LT3741EFE
DEMO CIRCUIT 1602A
U1
LT3741EFE
EN/UVLO
4
RT
14
SYNC
15
VREF
5
CTRL1
8
CTRL2
6
SS
9
VC
13
FB
10
SENSEN
12
SENSEP
11
GND
2
GND
7
GND
16
LG
20
VCC_INT
1
SW
18
CBOOT
19
HG
17
VIN
3
GND
21
C16
OPT
E4
VOUT
C8
R15
66.5K
C10
150uF
C3
R11
40.2K
C18
OPT
Q2
3
2
1
4
5
6
7
8
R12
680K
R10
10
E2
GND
E1
VIN
R2
124K
C2
4.7uF
1210
E10
+
C1
100uF,50V
50CE100LX
R5
100K
D1
DFLS140
1 2
E5
GND
R3
100K
C5
4.7uF
R13
10
R4
0.0025
2512
E7
CTRL2
L1
1.3uH
WE 7443551130
R9
OPT
Q4
OPT
3
2
1
4
5
6
7
8
Q3
BSC011N03LSI
3
2
1
4
5
6
7
8
R1
374K
C4
1210
Q1
BSC080N03LS G
3
2
1
4
5
6
7
8
C15
10nF
E9
C12
22uF
0805
R16
0
C9
47uF
1210
C13
2nF
R8
100K
R14
10k
E3
EN/UVLO
C11
E6
CTRL1
E8
SYNC
R7
45.3K
D2
DFLS240L
1 2
C6
1uF
50V
0805
C7
0.22uF
C14
33nF
R17
OPT
1206
C17
5nF