DC2044A - Schematic

5
4
3
2
1
REVISION HISTORY
ECO
E1
5.1
C1
0805
E3
C3
+
56uF
63V
63HVH56M
GND
E4
C2
+
56uF
63V
63HVH56M
C16
4.7uF
100V
1210
R1
100k
PVIN
R2
510k
SENSVIN
SENSTOP
U1
E2
D
9
SHDN
10
E5
R28
51k
LTC4020EUHF
INT_Vcc
15
E7
25
ILIMIT
R4
100k
RNG/SS
SW1
SW2
D1
SBR0560S1
12
2
30
R36
0
38
32
R31
ILIMIT
TG1
1
5-29-13
8-13-12
R24
D3
RED
R27
3K
R26
3K
E14
C20
0.22uF
25V
0603
D7
OPT
E16
VOUT
21V - 28V
3A MAX
VOUT
OPT
0603
C30
OPT
0603
0 2
D4
GREEN
0603
C19
0.22uF
25V
0603
M2A
Si7960DP
C14
4.7uF
1210
100V
4
D6
B360A
VOUT
L1
M3B
C18
4.7uF
1210
100V
C27
4.7uF
1210
100V
C28
4.7uF
1210
100V
+ C15
56uF
63V
63HVH56M
+
C17
56uF
63V
63HVH56M
Si7960DP
15uH
R7
20
BG1
37
R22
0
D5
B360A
OPT
4
C
C24
OPT
R8
226k
0.1%
0603
R9
226k
C25
OPT
SENSBOT
SENSGND
19
R37
26
VFBMAX
BG2
TG2
VFB
E9
E17
16
NTC
24
E8
11
MODE
14
B
8
R12
100k
C5
0.1uF
1206
R20
23
NTC
BGATE
22
21
R35
100
RCBAT1
0.015
0.5W
1206
R18
100
1 2 3
C10
1nF
0603
25V
4
M1
Si7461DP
VBAT
BAT
TIMER
OPT
0603
E12
5 6 7 8
MODE
RT
E10
0
CSOUT
R13
100k
R17
C11
2.2uF
0603
FBG
CSN
C4
100pF
16V
0
R19
4.7
18
R14
10k
C
R23
0
33
31
R11
24.9k
R29
OPT
SGND
2
RCBRB1
0.008
0.5W
1206
VFBMIN
CSP
R10
24.9k
0.1%
C12
0.033uF
R34
0
17
INT_VCC
5
4
0
Vc
ITH
SGND
SGND
PGND
SGND
3
29
35
39
C13
OPT
GND
E13
M3A
Si7960DP
C31
OPT
0603
3
R21
E15
8
7
R32
OPT
0603
1
R6
20
0
R25
XAL1010-153ME
5
6
M2B
Si7960DP
1
3
VBAT
DATE
Charlie Z.
GB
D
D2
SBR0560S1
13
R5
100k
APPROVED
INT_VCC
VIN_REG
STAT1
BST1
BST2
RNG / SS
34
C21
10uF
6.3V
0805
STAT2
DESCRIPTION
PRODUCTION
1st PROTOTYPE
RCBRT1
0.008
0.5W
1206
C22
0.033uF
OPT
7
6
SHDN
R3
OPT
E6
2
1
0603
100V
36
C23
4.7uF
100V
1210
REV
__
0.1uF
6
5
R38
7
8
VIN
15V - 55V
20
28
27
C26
OPT
1210
R15
56k
C7
OPT
C6
10nF
0603
R16
47k
C9
68pF
BAT
25.2V VFLOAT
3.3A MAX
B
GND
E11
C8
680pF
0603
0603
NOTE: UNLESS OTHERWISE SPECIFIED
1. ALL RESISTORS ARE IN OHMS, 0402.
ALL CAPACITORS ARE IN MICROFARADS, 0402.
A
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.
APPROVALS
PCB DES.
APP ENG.
TECHNOLOGY
HZ
Charlie Z.
TITLE: SCHEMATIC
HIGH VOLTAGE BUCK / BOOST
MULTI-CHEMISTRY BATTERY CHARGER
SIZE
N/A
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
5
4
3
SCALE = NONE
2
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.
LTC4020EUHF
2
DEMO CIRCUIT 2044A
Friday, September 20, 2013
SHEET 1
1
OF
1
A
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