DC1967A_15 Datasheet, PDF (1/2 Pages) Linear Technology – 400mA WIRELESS SYNCHRONOUS BUCK BATTERY CHARGER

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REVISION HISTORY
ECO REV
DESCRIPTION
APPROVED DATE
-
2
PRODUCTION FAB
GEORGE B. 9 - 17- 13
4
E1
Cx
3
E2
GND
E3
NTC
EMBEDDED INDUCTOR
DISCONNECTED
CONNECTED
JP1
43T
Embedded
Inductor
Lr
47µH
C2S1
4700pF
5%
50V
0805
C2P1
4700pF
5%
50V
0805
C2S2
0.022µF
5%
50V
0805
C2P2
1800pF
5%
50V
0603
E4
PROG
2
R4
2.0k
5%
VPROG
1
4
D1
DFLS240L
D2
DFLS240L
D3
DFLS240L
JP2
RUN
ON
VIN > 11V
OFF
R1
1.40MEG
R2
412k
D4
DFLZ39
39V
C5
10µF
50V
1210
U1
3 LTC4120-4.2EUD / LTC4120EUD
R11
R12
100k
100k
5%
5%
INTVCC
FREQ
R3 ^{1.5 MHz}
750 kHz
10k
JP3
16 _RUN
7 _FREQ
6 _DHC
IN
FAULT
CHRG
15
14
INTVCC ¹
BOOST ²
SW ⁴
CHGSNS ⁸
BAT ⁹
12 _NTC
10 _BATSNS/FB
13 _PROG
GND
GND
NC/FBG ¹¹
INTVCC
C3
0.01µF
0603
L1
15.0uH
C4
2.2µF
6.3V
C1
10uF
16V
0805
R12 TO BE CONNECTED TO " BAT "
NODE AT BAT TURRET (E6)
R9 *
R10 *
R5
3.01k
5
17
JP4
NTC
E10
VIN
4
5V - 40V
E9
GND
E8
nFAULT
E7
nCHRG
3
VBAR
E6
BAT
C2 ^{2.7 V - 11V}
47uF ^400mA
16V
1210
E5
GND
J1
OPT
1
2
3
BAT
GND
ENTC
2
DF3-3P-2DSA
R8
0
INT EXT
*
R6
0
ASSY
U1
-A LTC4120 - 4.2EUD
UNLESS NOTED:
RESISTORS: OHMS, 0402, 1%, 1/16W
-B LTC4120EUD
R7
CAPACITORS: uF, 0402, 10%, 50V
10k
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. NC
R9
OPEN
1.40MEG
R10
0 Ohm
1.05MEG
1630 McCarthy Blvd.
Milpitas, CA 95035
Phone: [phone] www.linear.com
TECHNOLOGY
Fax: [phone]
LTC Confidential-For Customer Use Only
1
VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL
APPLICATION. COMPONENT SUBSTITUTION AND PRINTED
CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT
APP ENG. GEORGE B.
TITLE: SCHEMATIC
400mA WIRELESS SYNCHRONOUS BUCK BATTERY CHARGER
PERFORMANCE OR RELIABILITY. CONTACT LINEAR
TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE.
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
SCALE = NONE
SIZE IC NO. _{LTC4120 - 4.2EUD / LTC4120EUD}
REV.
N/A
DEMO CIRCUIT 1967A - A / B
2
DATE: 9 - 17 - 13
SHEET 1 OF 2
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