12
dc2181afb
DEMO MANUAL
DC2181A-A/B
schematic Diagram
UNLESS NOTED: RESISTORS: OHMS, 0402, 1%, 1/16W CAPACITORS: uF, 0402, 10%, 50V
1.221V
U2.3
U3.3
1.186V
1.186V
CHG CURRENT
VPROG
VBAR
SIZE
DATE:
.V
ER
.O
N
CI
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
CUST
OMER 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
3
DEMO CIRCUIT 2181A - A / B
2
2
BAR GRAPH FOR 400mA WIRELESS SYNCHRONOUS
N/A
LTC4120EUD - 4.2 / LTC4120EUD
NC
GEORGE B.
BUCK BATTERY CHARGER
7 - 17 -14
SIZE
DATE:
.V
ER
.O
N
CI
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
CUST
OMER 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
3
DEMO CIRCUIT 2181A - A / B
2
2
BAR GRAPH FOR 400mA WIRELESS SYNCHRONOUS
N/A
LTC4120EUD - 4.2 / LTC4120EUD
NC
GEORGE B.
BUCK BATTERY CHARGER
7 - 17 -14
SIZE
DATE:
.V
ER
.O
N
CI
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
CUST
OMER 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
3
DEMO CIRCUIT 2181A - A / B
2
2
BAR GRAPH FOR 400mA WIRELESS SYNCHRONOUS
N/A
LTC4120EUD - 4.2 / LTC4120EUD
NC
GEORGE B.
BUCK BATTERY CHARGER
7 - 17 -14
D12
94%
1
2
R21
100k
C8 0.01µF
R14 432
U2E
LTC1445CDHD
REF
8
V-
9
R25
1k
5%
R32 1k
5%
R16
34.8k
D6
19%
1
2
R19 100k
U3D
LTC1445CDHD
13
12
14
9
15
3
17
R20
100k
U2C
LTC1445CDHD
11
10
14
9
16
3
17
R26 1k
5%
C9 0.01µF
U3B
LTC1445CDHD
7
6
14
9
1
3
17
R17
100k
R24
49.9k
C6
0.01µF
R23 100k
U2D
LTC1445CDHD
13
12
14
9
15
3
17
R18
100k
R30
1k
5%
R35
432
R33
22.6k
C7 1µF 10V
R28 1k
5%
U3E
LTC1445CDHD
REF
8
V-
9
D10
69%
1
2
R29 1k
5%
R34
787k
C10 1µF 10V
D9
56%
1
2
D11
81%
1
2
D8
44%
1
2
R38
0
R13 10k
5%
D5
6%
1
2
D7
31%
1
2
U3C
LTC1445CDHD
11
10
14
9
16
3
17
R31 1k
5%
R22 100k
R27 1k
5%
R15 22.6k
U2B
LTC1445CDHD
7
6
14
9
1
3
17
U2A
LTC1445CDHD
5
4
14
9
2
3
17
U3A
LTC1445CDHD
5
4
14
9
2
3
17
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