Linear Technology DC2221A, Демонстрационное руководство, Страница: 5 / 7

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dc2221af
DEMO MANUAL DC2221A
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 5
4 4
3 3
2 2
1 1
D
D
C
C
B
B
A
A
NOTES:
12V / 15A
16V - 38V
RUN
ON OFF
BURST
FCM
MODE
3. FOR SYNCHRONIZATION REMOVE JUMPER JP2 'MODE' AND CONNECT SOURCE OF THE SYNC SIGNAL TO TERMINALS E8 'SYNC' AND E9 'GND'
PULSE SKIP
1. ALL RESISTORS AND CAPACITORS ARE 0603 2. INSTALL SHUNTS AS SHOWN.
5/6/14
2
S+ S-
TG
RS+
S+
S-
RS+
BG
INTVCC
VIN
INTVCC
VOUT
VIN
VOUT
VIN
INTVCC
VOUT
INTVCC
INTVCC
INTVCC
VIN
VIN
REVISION HISTORY
DESCRIPTIO
N
DATE
APPROVED
EC
O
REV
DING L.
PRODUCTION
__
REVISION HISTORY
DESCRIPTIO
N
DATE
APPROVED
EC
O
REV
DING L.
PRODUCTION
__
REVISION HISTORY
DESCRIPTIO
N
DATE
APPROVED
EC
O
REV
DING L.
PRODUCTION
__
SIZE DATE:
.V
ER
.
ON
CI
SHEE
T
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
Thursday, July 24, 2014
1
1
LOW QUIESCENT CURRENT HIGH VOLTAGE STEP-DOWN CONVERTER
HZ
Ding L.
N/A
LTC3807EFE
DEMO CIRCUIT 2221A
SIZE DATE:
.V
ER
.
ON
CI
SHEE
T
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
Thursday, July 24, 2014
1
1
LOW QUIESCENT CURRENT HIGH VOLTAGE STEP-DOWN CONVERTER
HZ
Ding L.
N/A
LTC3807EFE
DEMO CIRCUIT 2221A
SIZE DATE:
.V
ER
.
ON
CI
SHEE
T
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
Thursday, July 24, 2014
1
1
LOW QUIESCENT CURRENT HIGH VOLTAGE STEP-DOWN CONVERTER
HZ
Ding L.
N/A
LTC3807EFE
DEMO CIRCUIT 2221A
C26 OPT C26 OPT
C9
0.1uF
C9
0.1uF
C34 OPT C34 OPT
R17
15.4K
R17
15.4K
R8 0 R8 0
Q1 OPTQ1OPT
3
1
2
4
5
E10
GND
E10
GND
C11 OPT C11 OPT
R3 OPT R3 OPT
+
C20 OPT 7343
+
C20 OPT 7343
C19 OPT C19 OPT
D1D1
2
1
R21 OPT R21 OPT
E2
GND
E2
GND
J3
VOUT
J3
VOUT
R16 57.6K R16 57.6K
C13 0.1uF C13 0.1uF
R2 0 R2 0
C18 OPT C18 OPT
R18 1K R18 1K
Q4
BSC093N04LS
Q4
BSC093N04LS
3
1
2
4
5
RS1 0.003 2512 RS1 0.003 2512
R15
2
R15
2
R22 OPT R22 OPT
C17 1uF C17 1uF
R25 OPT R25 OPT
D3 OPT D3 OPT
2 1
C33 OPT C33 OPT
J2
GND
J2
GND
E7
GND
E7
GND
C24 OPT C24 OPT
C2 10uF 50V 1210 C2 10uF 50V 1210
R11 OPT R11 OPT
C6
4.7uF 0805
C6
4.7uF 0805
R13
10
R13
10
C32 OPT C32 OPT
R6
27.4K
R6
27.4K
TP2
GND
TP2
GND
R24 OPT R24 OPT
TP1
Vin_EMI
TP1
Vin_EMI
JP2JP2
1 3
2 4
5
6
C28 OPT C28 OPT
E4
EXTVCC
E4
EXTVCC
R7 35.7K R7 35.7K
C25 2.2uF 50V 0805 C25 2.2uF 50V 0805
C7 1uF C7 1uF
E1
VIN
E1
VIN
J4
GND
J4
GND
L2
OPT
L2
OPT
C29 OPT C29 OPT
+
C16 150uF 16V 16SVPC150M
+
C16 150uF 16V 16SVPC150M
R23 OPT R23 OPT
R12 OPT R12 OPT
C12
4.7nF
C12
4.7nF
U1 LTC3807EFE U1 LTC3807EFE
VIN
19
PGOOD
11
EXTVCC
17
TRACK/SS
1
RUN
6
ITH
10
SGND
4
SGND
5
PGND
18
PLLIN/MODE
3
ILIM
20
BG
15
SW
13
TG
12
BOOST
14
SENSE+
8
SENSE-
7
INTVCC
16
VFB
9
FREQ
2
SGND
21
C15 10uF 1206 C15 10uF 1206
C5 10pF C5 10pF
E6
VOUT
E6
VOUT
C27 OPT C27 OPT
C8 1000pF C8 1000pF
L1
10uH
L1
10uH
+
C3 82uF/50V
+
C3 82uF/50V
Q3 OPT Q3 OPT
3
1
2
4
5
C31 OPT C31 OPT
R5 511K 0805 R5 511K 0805
Q2
BSC035N04LS
Q2
BSC035N04LS
3
1
2
4
5
R4 100k R4 100k
J1
VIN
J1
VIN
E3
PGOOD
E3
PGOOD
R14 1 Meg 0805 R14 1 Meg 0805
+
C22 OPT 7343
+
C22 OPT 7343
E8
SYNC
E8
SYNC
+
C21 OPT 7343
+
C21 OPT 7343
R9
OPT
R9
OPT
E5
TRACK
E5
TRACK
JP1
ON 10th?? OFF
RUN
JP1
ON 10th?? OFF
RUN
1 3 2
R1 2.2 R1 2.2
R20 100K R20 100K
R19 OPT R19 OPT
C14 47pF C14 47pF
E9
GND
E9
GND
C4 0.1uF 50V C4 0.1uF 50V
R10
0
R10
0
C30
2.2uF
C30
2.2uF
C23 10uF 50V 1210 C23 10uF 50V 1210