DC1778B - Schematic

5
4
3
2
1
ALL PARTS ON THIS PAGE ARE FOR DEMO BOARD ONLY, NOT NEEDED IN CUSTOMER DESIGN
D
D
ALERTB
SDA
TP11
SHARE_CLK
SCL
TP12
TP13
TP14
SYNC
TP15
TP16
SYNC
GPIOB
ALERTB
SDA
SCL
SC
R83 0
GPIOB
D9
OPT
TP17
RUN
R79 0
3V3
C
R96
OPT
C50
100nF
R84
4.99K
U5
2
3
4
A0
VCC
A1
WP
A2
SCL
VSS
SDA
R87
OPT
R85
4.99K
J15
1
2
3
4
5
6
7
8
9
10
11
12
13
14
1
2
3
4
5
6
7
8
9
10
11
12
13
14
DEMO HEADER (M)
TP18
7
EEWP
6
EESCL
5
EESDA
OPT
R82
OPT
C
R49
10.0K
SW1
RUN
ON
2
5
R77
10
OFF
J14 DEMO HEADER (F)
VIN
R81
SGND
FAULTB
CTRL
ALERTB
SDA
SHARE_CLK
SCL
RESETB
AUXP
UNUSED
UNUSED
GND
GND
12V
12V
R86
OPT
1206
8 AUXVCC
24LC025-I/ST
R90
0
VDD33
FAULTB
CTRL
ALERTB
SDA
SHARE_CLK
SCL
RESETB
AUXP
UNUSED
UNUSED
GND
GND
12V
12V
TO DC1613A
1
RUN
4
1
AUXP
SDA
GND
SCL
LGKPWR
ALERTB
GPIO_1
OUTEN_0
OUTEN_1
GND
AUXSCL
AUXSDA
1
2
3
4
5
6
7
8
9
10
11
12
6
3
J10
3V3
C46
10nF
VIN
B
B
TP19
GND
CUSTOMER NOTICE
APPROVALS
LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A
CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS;
HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO PCB DES.
VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL
APPLICATION. COMPONENT SUBSTITUTION AND PRINTED
APP ENG.
CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT
PERFORMANCE OR RELIABILITY. CONTACT LINEAR
TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE.
A
TECHNOLOGY
HZ
YI S.
TITLE: SCHEMATIC
SINGLE PHASE DC/DC CONVERTER
WITH INPUT CURRENT SENSE
SIZE
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
5
4
3
N/A
SCALE = NONE
2
1630 McCarthy Blvd.
Milpitas, CA 95035
Phone: (408)432-1900 www.linear.com
Fax: (408)434-0507
LTC Confidential-For Customer Use Only
DATE:
IC NO.
LTC3883EUH FAMILY
REV.
2
DEMO CIRCUIT 1778A
Monday, December 21, 2015
SHEET 2
1
OF 3
A
5
4
3
2
1
REVISION HISTORY
ECO
REV
1
INT/EXTVCC
TP1
R1
DESCRIPTION
APPROVED
PRODUCTION
1
DATE
1-13-15
YI S.
OPT
EXTVCC_DRV
R58
C1
4.7uF
VDD25
VDD33
TP2
C2
100nF
R2
VDD33
TP3
VDD33
R5
C5
1uF
OPT
C30
0.01uF
2
OFF
9
WP
19
11
1
10
PGOOD
SYNC
SDA
ALERT
5
SYNC
20
SC
IIN_SNS
VIN_SNS
TG
WP
BOOST
RUN
SW
VOUT_CFG
15
VDD25
VTRIM_CFG
TP6
VDD25
12
P1
R24
OPT
R25
OPT
16
R26
P2
OPT
R28
4.32K
R29
OPT
R30
OPT
1
BSC050NE2LS
Q1
C7
10uF
4
Q2
BSC010NE2LSI
OPT
4
23
TG
24
BOOST
22
SW
26
BG
R14 0
C10
100nF
BG
VOUT
L1
Q3
BSC010NE2LSI
Q4
BSC011NE2LSI
OPT
*
SHARE_CLK
ISENSE+
ISENSE-
3
ISENSE+
4
ISENSE-
4
ASEL
FREQ_CFG
VSENSE+
VOUT_CFG
VSENSE-
VTRIM_CFG
TSNS
30
VSENSE+
31
VSENSE-
32
TSNS
29
ITH
R21
C17
C18
DNC
DNC
ITH
0.1uF
*
Q5
R27
*
TP26
VOUT
+
C11
100uF
R18
R17
4
C16
R15
VOUT
0.9V -1.8V
25A
2512
SYNC
33
R23
24.9K
17
C9
10uF
IIN_SNS
*
*
1
2
3
14
2
PGOOD
PGND
FREQ_CFG
GND
28
R19
R20
*
*
C12
100uF
C13
100uF
C14
330uF
6.3V
+
C15
330uF
6.3V
R16
0
C
TP5
VSENSE+
VSENSE+
+ C28
OPT
6.3V
*
+ C23
OPT
6.3V
TP27
GND
*
R22
0
*
TP7
VSENSE-
C19
680pF
25
13
TP4
GPIO
GND
ASEL
TP25
1uF
5
VIN
TP8
GND
C32
10uF
D1
PGOOD
SC
C33
10uF
C34
1uF
27
U1
LTC3883EUH
100
D
1
2
3
GPIOB
RUN
RUN
C
8
SCL
100
5
GPIOB
3
ON
7
ALERTB
ALERTB
JP1
WP
6
R4
1
2
3
SDA
PGOOD
SCL
SDA
R3
C8
5
SCL
TP22
R13
1K
INTVCC
R12
1K
21
R11
10K
VDD33
R10
10K
18
R9
10K
VDD25
R8
10K
VIN
6.5V - 14V
+ C3
150uF
35V
GND
C6
0.1uF
INTVCC
R6
R7
4.99K 1K
C31
0.01uF
TP24
0.005
5
C4
1uF
VIN
VIN
VIN
1
2
3
D
3
R32
10k
R31
OPT
VSENSE-
C20
47pF
PLACE Q5 CLOSE TO L1
R33
0
TP9
ITH
B
B
*
ASSY
-A
R SENSE
-B
DCR SENSE
NOTE: UNLESS OTHERWISE SPECIFIED
CURRENT SENSE CONNECTIONS
R17
R18
OPEN
OPEN
845
0
R19
L1,L2
R20
R15
R21
R27
C17
0
0
0.002
100
100
1nF
OPEN
0.4uH
OPEN
OPEN
0
0
845
0.22uF
1.0 uF
0.55uH
NOTE:
FSW = 500 KHz FOR "A" VERSION
FSW = 500 KHz FOR "B" VERSION
C16
1. ALL RESISTORS ARE IN OHMS, 0603.
ALL CAPACITORS ARE IN MICROFARADS, 0603.
2. INSTALL SHUNTS AS SHOWN.
CUSTOMER NOTICE
APPROVALS
LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A
CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS;
HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO PCB DES.
VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL
APPLICATION. COMPONENT SUBSTITUTION AND PRINTED
APP ENG.
CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT
PERFORMANCE OR RELIABILITY. CONTACT LINEAR
TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE.
A
TECHNOLOGY
HZ
YI S.
TITLE: SCHEMATIC
SINGLE PHASE DC/DC CONVERTER
WITH INPUT CURRENT SENSE
SIZE
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
5
4
3
N/A
SCALE = NONE
2
1630 McCarthy Blvd.
Milpitas, CA 95035
Phone: (408)432-1900 www.linear.com
Fax: (408)434-0507
LTC Confidential-For Customer Use Only
DATE:
IC NO.
LTC3883EUH FAMILY
REV.
1
DEMO CIRCUIT 1778B
Monday, December 21, 2015
SHEET 1
1
OF 3
A
5
4
3
2
1
ALL PARTS ON THIS PAGE ARE FOR DEMO ONLY, NOT NEEDED IN CUSTOMER DESIGN
D
D
5
C24
0.22uF
4
2
VOUT
R51
249
2
3
4
5
D2
VSENSE-
R53
10K
TP0101K
Q7
D4
GPIOB
GND
VOUT
GREEN
R52
30
1W
2512
OPT
Q9
2N7002A
1
PGOOD
R55
249
2N7002A
2
2
R54
0.05
1
ALERT
RED
D3
Q8
TP21
VOUT
PGOOD
GREEN
TP28 IOUT
TST
1
2
3
DO NOT EXCEED 5% DUTY CYCLE!
BLEEDER LOADS
R60
249
1
ALERTB
GPIOB
3
PULSE IN
+3.3V
LED INDICATOR CIRCUITS
J9
1
Q6
BSC050NE2LS
+3.3V
3
DYNAMIC LOAD CIRCUIT
TP20
+3.3V
VSENSE+
3
VOUT
C
C
5V SUPPLY FOR LTC3883-1 ONLY
LED SUPPLY
VIN
VIN
VIN
JP6
LED
R56
100K
U3
2
5
OFF
1
6
7
8
C26
1uF
SHDN
NC
GND
GND
GND
SENSE/ADJ
VIN
U4
ON
OUTPUT
2
4
5
OFF
3
C25
4.7uF
2
1
6
1
ON
R57
100K
3
3
JP5
EXTVCC_DRV
7
8
EXTVCC_DRV
LT1129CS8-5
C27
1uF
SHDN
NC
GND
GND
GND
SENSE/ADJ
VIN
OUTPUT
4
3
+3.3V
2
1
LT1129CS8-3.3
C29
10uF
B
B
Q10
3V3
VDD33
TP0101K
VIN
2
1
3
R61 10.0K
R62
15.8K
CUSTOMER NOTICE
APPROVALS
LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A
CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS;
HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO PCB DES.
VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL
APPLICATION. COMPONENT SUBSTITUTION AND PRINTED
APP ENG.
CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT
PERFORMANCE OR RELIABILITY. CONTACT LINEAR
TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE.
A
TECHNOLOGY
HZ
YI S.
TITLE: SCHEMATIC
SINGLE PHASE DC/DC CONVERTER
WITH INPUT CURRENT SENSE
SIZE
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
5
4
3
N/A
SCALE = NONE
2
1630 McCarthy Blvd.
Milpitas, CA 95035
Phone: (408)432-1900 www.linear.com
Fax: (408)434-0507
LTC Confidential-For Customer Use Only
DATE:
IC NO.
LTC3883EUH FAMILY
REV.
2
DEMO CIRCUIT 1778A
Monday, December 21, 2015
SHEET 3
1
OF 3
A
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