DC1702A - Schematic

4
3
2
1
REVISION HISTORY
4
E1
ON
OFF
R1
C1
1uF
25V
0603
10 %
E2
GND
JP1
VIN
REV
-
1
DESCRIPTION
4.2V
4.1V
4.0V
3
C5
150uF
6.3V
C2
20%
OPT
C4
100uF
6.3V
1210
20%
OPT
NTCBIAS
WARNING: DO NOT FLOAT,
2.7V
JUMPER JP3 MUST BE INSTALLED
3.2V
8
VCC
ADJ
HBO
E8
4
HBO
E7
5
25 mils clearance
1
LBSEL
Charged
1
NTCBIAS
2
NTC
JP6
D1
Charging
2
HBO
R7
Charging
1K
5%
Charged
R3
10k
E4
25 mils clearance
NTC
3
GND
HBO LED
JP5
JP3
LBSEL
E3
4
C3
100uF
6.3V
1210
20%
OPT
R2
200
3
DATE
04-28-10
VCC
40mA
C2
0.22uF
25V
0805
U1
LTC4071EDDB
GEORGE B.
E9
499
1%
2512
JP2
VFLOAT
APPROVED
PRODUCTION FAB
25 mils clearance
VIN
5V - 25V
ECO
E6
GND
GND
6
9
BAT
7
BAT
40mA
J1
DF3-3P-2DSA
1
2
3
2
BAT
GND
ENTC
2
OPT
E5
GND
JP4
NTC
R6
INT
EXT
0
R4
0
1
UNLESS NOTED:
RESISTORS: OHMS, 0402, 1%, 1/16W
CAPACITORS: uF, 0402, 10%, 50V
CUSTOMER NOTICE
R5
10k
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.
NOTE: C3,C4 AND C5 PCB
FOOTPRINTS CAN
ACCOMODATE 1206,1210,1812
SMD FOOTPRINTS.
4
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
3
2
APPROVALS
PCB DES.
NC
APP ENG.
GEORGE B.
TECHNOLOGY
TITLE: SCHEMATIC
LI - ION / POLYMER SHUNT BATTERY
CHARGER SYSTEM WITH LOW BATTERY DISCONNECT
SIZE
N/A
SCALE = NONE
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.
REV.
LTC4071EDDB
DEMO CIRCUIT 1702A
Wednesday, September 08, 2010
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