DC1721B - Schematic

5
4
3
2
1
REVISION HISTORY
ECO
REV
__
7
6
5
8
7
6
5
8
C35
0.01uF
F1
6.3A
26
VIN+
VIN
22
U2
RST
BAT
14.6V / 5A
E17
GND
11
*
NTC
CNTC
OPT
10
BIAS
CLN
BIAS
E14
R38
OPT
9
R20
*
RIFB1
RVM2
10K
1
BIAS
ENABLE
GND
GND
3
GND
R39
OPT
J5
TMR
CCX
OPT
NOT ON THE BOARD
CBIAS
1uF
10V
RCX
10K
*
2
IBMON
CHARGE
CIBMON
1000pF
CIIMON
1000pF
2
E10
IIMON
3
JP1
LED2
R46
2.2K
GRN
1
4
E13
FLT
INTVCC
3
CHRG
CHRG
E12
C33
4.7uF
10V
E11
B
2
R47
4.7K
BIAS
RED
*
BIAS
6
R50
20K
R44
38.3K
3
OUT
8
OPTIONAL THERMAL PROTECTION FOR Q6
DURING VOUT-SYS SHORT CIRCUIT
R45
1.00M
1
RIL
OPT
18.2K
-B
LTC4000EGN-1
21.5K 2.00K
1. ALL RESISTORS ARE IN OHMS, 0603.
ALL CAPACITORS ARE IN MICROFARADS, 0603.
HYST
6 REF
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
LT
DAVID B.
TITLE: SCHEMATIC
SIZE
THERMAL REGULATION FOR Q7
DURING 'INSTANT-ON' OPERATION
4
RIFB1
2
+
-
U2
LTC4000EGN
NOTE: UNLESS OTHERWISE SPECIFIED
Q8
2N7002L
1
2
RNTC2
10K
IN-
ASSY
-A
NTC
GND
5
6 REF
IN+
V+
7
3
4
R59
1.00M
5
R49
100K
HYST
V-
R57
20K
R48
10K
V-
6
R58
38.3K
Q9
2N7002L
1
2
RNTC3
10K
IN-
OUT
8
U3
LTC1540CMS8
2
5
+
-
V+
7
4
IN+
GND
3
IL
3
U4
LTC1540CMS8
R56
68.1K
1
R55
10K
6
RIL
CTMR
0.1uF
DISABLE
B
RCL
24K
24
IL
4
CL
IL/IFB
TMR
1
CX
28
5
TMR
IBMON
2
IIMON
27
7
CHRG
ENC
VM
D9
BZT52C3V0S
8
RVM1
36.5K
25
CIN
1uF
50V
1210
VIN+
IL
IN
FLT
C
23
1
C
A
D
NTC
RUN
FROM PAGE 2
10-02-12
NTC
FBG
12
BAT
BFB
13
14
CSN
BGATE
15
17
16
CSP
IID
ITH
DATE
DAVID B.
GND
J4
CBAT
2.2uF
25V
0805
RBFB2
84.5K
RBFB1
1.00M
ROFB2
84.5K
E15
E20
R42 OPT
APPROVED
VOUT-SYS
15V
6.25A LIMIT
J3
E18
CC
20
3
2
1
R43 OPT
ROFB1
1.00M
R51
0
18
0.1uF
R62
CHRG OPT
IGATE
14.7K
R52
0
R53
OPT
19
CC2
21
RC1
4
CC1
OPT
RCS
10m
3
2
1
CL
2.2uF
25V
0805
Q7
Si7135D
4
VOUT
R54
0
D
Q6
Si7135D
OFB
ITH
DESCRIPTION
PRODUCTION
1
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
3
N/A
SCALE = NONE
2
DATE:
IC NO.
1630 McCarthy Blvd.
Milpitas, CA 95035
Phone: (408)432-1900 www.linear.com
Fax: (408)434-0507
LTC Confidential-For Customer Use Only
STEP UP/DOWN BATTERY CHARGER
AND POWER MANAGER
LTC4000EGN / EGN-1, LTC3789EGN
DEMO CIRCUIT 1721B
Tuesday, October 02, 2012
SHEET 1
1
REV.
1
OF 2
A
5
4
3
2
1
INTVCC
E3
R7
100K
E4
VIN
VOS+
D
PGOOD
RFB2
8.06K
E6
RFB1
154K
EXTVCC
CF
OPT
R41
OPT
INTVCC
C15
1uF
50V
INTVCC
R5
15
0805
CIN3
OPT
Q2
SiR422DP
2
4
5
3
CCM
VOUT
PLLIN
E8
R24
10K
R14
100
VIN
C34
0.01uF
R13
100
C19
1000pF
6
7
R21 121K 1%
8
9
C7
BIAS
RUN
R30
OPT
OPT
C8
11
OPT
12
INTVCC
13
R22
OPT
B
10
R25
0
C10
2.2uF
14
TG1
SENSE1ITH
BOOST1
PGND1
SGND
BG1
MODE/PLLIN
VIN
FREQ
INTVCC
RUN
EXTVCC
VINSNS
BG2
VOUTSNS
ILIM
BOOST2
TG2
IOSENSE+
+
CIN2
56uF
50V
SW2
IOSENSE-
NC
1
2
3
C4
0.22uF
16V
26
25
R11
10
24
E1
22
INTVCC
20
C24
1uF
4
18
D5
B240A
4
3
C22
0.22uF
16V
17
Q5
SiR496DP
BG1
1206
D7
DFLS160
19
D2
BAS16
VOUT1
2
1
D10
BZT52C5V6
Q10
OPT
(FZT603)
GND
COUT1
150uF
D6 20V
B240A
+
C1
C2
C16
C17
22uF
25V
1210
0.008
2%
C3
C23
OPT
16V
1210
COUT2
+ 150uF
20V
R8
10
VOS+
C
C13
1.8nF
1206
R29
3.6
1206
1
BG2
R1
5.6
TG2
16
15
GND
4.7uH
C18
10uF
21
D
VIN+
VOUT
L1
Q4
SiR422DP
D4
DFLS160
23
J1
R2
1
2
3
SW1
SENSE1+
1
R10
SS
Q3 VOUT1
SiR496DP
4
27
2
C11
1.24K
OPT
R60 10K ITH
CIN1
56uF
50V
J2
C12
390pF
1206
8
5
6
7
MODE
JP2
3
+
1
2
3
1.24K
R9
PGOOD
1
1
PULSE
SKIP
C
2
VFB
28
2
CSS
0.022uF
INTVCC
R28
5.6
1206
4
1
2
E7
VIN
6V - 36V
11A MAX
E2
U1
LTC3789EGN
1
SS
C5
C6
3.3uF
50V
1210
0.004
2%
TG1
8
5
6
7
C14
0.1uF
C9
C25
3.3uF
50V
1210
C26
C27
OPT
CIN4
OPT
+
ITH
R40
OPT
SW1
CF1
OPT
+
1
2
3
E5
SGND
VIN+
R20
R27
OPT
8
5
6
7
VLOGIC
8
5
6
7
INTVCC
R61
OPT
(10K)
D11
1 OPT
10V
2 (MM3Z10VT1)
SW2
CS
B
R18
0.008
2%
EXTVCC
EXTVCC
R6
E9
R12
R4
R3
OPT
OPT
100
100
<------
------>
CUSTOMER NOTICE
A
CIRCUITRY ON THIS
SIDE MUST CONNECT
TO SIGNAL GND
GROUNDPLANE
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.
CIRCUITRY ON THIS
SIDE MUST CONNECT
TO POWER GND
GROUNDPLANE
APPROVALS
PCB DES.
APP ENG.
TECHNOLOGY
LT
DAVID B.
TITLE: SCHEMATIC
SIZE
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
5
4
3
N/A
SCALE = NONE
2
DATE:
IC NO.
1630 McCarthy Blvd.
Milpitas, CA 95035
Phone: (408)432-1900 www.linear.com
Fax: (408)434-0507
LTC Confidential-For Customer Use Only
STEP UP/DOWN BATTERY CHARGER
AND POWER MANAGER
LTC4000EGN /EGN-1, LTC3789EGN
DEMO CIRCUIT 1721B
Tuesday, October 02, 2012
SHEET 2
1
REV.
1
OF 2
A
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