5
dc1229bf
DEMO MANUAL DC1229B
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
VIN
7.
5V
- 32V
TIMER
C/10
2A
Unless noted: Resistors: Ohms 0402 1% 1/16W Capacitors: 0402 10% 10V
VF
LO
AT
*
(OPT)
X
VERSION TABLE
JP2
Assembly Ve
rs
io
n
UVLO
VF
LO
AT
*
DC1229B
-
A
DC1229B
- B
0
4.2V
U1
0
LT
36
50
ED
D
- 4
.2
1
JP1
1
*
1
LT
36
50
ED
D
- 4
.1
4.
1V
0
0
RUN
1
SHDN
1
*
B
DC1229B - A/B
Wednesday, April 01, 2009
1
1
J.Drew
1/19/09
J.Drew
1/19/09
2A Monolithic Li-Ion Battery Charger
LT3650EDD - 4.2 / LT3650EDD - 4.1
SIZE
SCALE:
CAGE CODE
DWG NO
REV
SHEET
OF
FILENAME:
TITLE
CONTRACT NO.
APPROVALS
DATE
DRAWN
CHECKED
APPROVED
ENGINEER
DESIGNER
TECHNOLOGY
1630 McCarthy Blvd. Milpitas, CA 95035 Phone: (408)432-1900 Fax: (408)434-0507
TH
IS
C
IRCUI
T I
S PROPRI
ETARY TO LI
NEAR TECHNOLOGY AND
SUPPLI
ED FOR USE WI
TH LI
NEAR TECHNOLOGY PARTS
.
LI
NE
AR
TECHNOLOGY HAS MADE A BEST
EFFORT TO DESI
GN A
CI
RC
UI
T
TH
AT
M
EETS C
USTO
MER
-SU
PPLI
ED
SPECI
FI
CATI
ONS;
HOWEVER,
IT REMAI
NS THE CUSTOMER'
S RESPONSI
BIL
ITY
TO
VE
RI
FY
PROPER
AND RELI
ABLE OPERATI
ON I
N THE
ACTUAL
AP
PL
IC
AT
IO
N.
COMPONENT SUBSTI
TUTI
ON AND PRI
NTED
CI
RC
UI
T B
OA
RD
L
AY
OU
T M
AY
S
IG
NI
FI
CA
NT
LY
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FF
EC
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CI
RC
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PERFORMANCE
OR
RELI
AB
IL
IT
Y.
C
ON
TA
CT
L
IN
EA
R
TECHNOLOGY APPLI
CATI
ONS ENGI
NEERI
NG
FOR ASS
IS
TA
NC
E.
CU
STOMER NOTICE
E8
GND
C4 10uF 16V 0805 10%
C6 4.7uF 50V 121
0
R5
100K
D2 CMPSH1-4
1
3
2
C1 1uF 50V 080
5
D3
FAULT
RED
JP1
1
2
3
E7
RNG / SS
R6
(OPT)
C12 0.01uF 060
3
50V
E5
GND
C3 4.7uF 50V 1210
E3
GND
R2
5.1K 120
6
E1
SYSTEM LOAD
E2
R8 0.1 120
6
1/2W
JP3
1
2
3
D1
CMSH3-40MA
2
1
J1
DF3-3P-2DSA
(OPT)
1 2 3
BAT GND NTC
R3
5.1
K
1206
LT3650EDD
U1
2
3
11
5
7
4
9
8
1
6
12
10
13
CLP
SHDN
BOOST
FAULT
RNG/SS
CHRG
BAT
NTC
VIN
TIMER
SW
SENSE
GND
C8 0.1u
F
L1
6.8uH
IH
LP
-2
525CZ-01
1
2
+
C2 22uF 50V 20%
1
2
E6
NTC
R7 1.0Meg
C10 0.022uF 16V
R4 0.05 120
6
1/4W
R1
0
0805
E4
BAT
C9 10
0uF
6.3V 1206 20%
D4
CHRG
GRN
C11 0.
022uF
16V
JP2
1
2
3
C5
0.1uF
C7 0.68uF