DC1046A - Schematic

A
NOTES:
B
C
D
E
UNLESS OTHERWISE SPECIFIED
EXTVCC
R1
10
TP1
VBIAS
( < 7V )
VBIAS
4
TP2
D1
MMDL770T1
2
1
VIN
VIN
C6
1uF
16V
C12
100pF
C22
(Opt.)
C47
0.1uF
100V
RUN
TP9
VIN
C48
47pF
2
C26
1000pF
1
2
JP1
FCB
3
CCM DCM
R15
10K
R8
8.25K
1%
C23
(Opt.)
D5
MMBZ5230B
4.7V
R10
15K
R12
220K
+6V
R17
(Opt.)
1
PGOOD
2
SS
3
SENSE+
4
SENSE-
5
ITH
BOOST1
TG1
23
SW1
22
VIN
21
EXTVCC
20
INTVCC
19
6
VOSENSE
7
SGND
BG1
18
8
RUN
PGND
17
9
FCB
BG2
16
10
PLLFLTR
SW2
15
11
PLLIN
TG2
14
12
STBYMD
BOOST2
13
R16
8.87K
C29
(Opt.)
C30
(Opt.)
R18
2.67K
C7
0.22uF
16V
TS2
GND
GND
VOS+
TG1
VOS+
VOUT
+6V
C25
10uF
10V
C24
1uF
16V
C21
0.1uF
16V
L1
10uH
R9
0
BG1A
R31
TS1
R14
20
BG2A
CDEP147-100MC-125
R11
0
C27
0.1uF
16V
36V-72V
TP4
+6V
4
C13 C17
C14 C18
C15 C19
C16
COUT1
2.2uF
+ 220uF
100V
63V
3
R7
487K
1%
VOS+
C10
68pF
R6
100
4
VIN
J1
J2
C2-C5 2.2uF 4x
2
SENSE-
R5
220K
C9
SW1
(Opt.)
24
TS
CIN2
+ (Opt.)
R4
10
COUT2
+ 220uF
63V
C20
2.2uF
100V
C42
C43
C44
C45
C46
(Opt.)
VOUT
J3
+48V/6A max
GND
J4
C14-C21 2.2uF 7x
D4
PDS560
3
TP7
VOS-
D3
PDS560
TP8
5
6
7
8
C11
1000pF
R3
100
INP
CIN1
+ 100uF
100V
Q2
Si7852DP
D6
B1100
Q3
Si7852DP
4
0
1
D7
1N4148W
2
C28
3300pF
SENSE+
SENSESYNC
2
1
2
3
3
U2
LTC3780EG
SENSE+
3
3
TP6
C8
0.022uF
TG
Q1
Si7852DP
2
1
SS
GND
5
1
TP5
D2
1N5819HW (Opt.)
2
1
4
2
C2 C3
C4 C5
2.2uF
100V
C1
2.2uF
100V
5
6
7
8
+6V
BOOST
TG2A
1
2
3
R2
10K
PGOOD
VCC
R13
0
6
5
6
7
8
U1
LTC4440ES6
1
TP3
1
2
3
VBIAS
4
10V-12V
RSEN
R32
10
RS1
0.025
1W
R33
10
RS2
0.025
1W
TP10
STBYMD
C41
0.1uF
16V
TP11
SGND
TP12
LTC CONFIDENTIAL - FOR CUSTOMER USE ONLY
1
Customer Notice
Maximum Load at TA=25c
Cooling Condition
No Fan
150 LFM Fan
A
B
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.
This Circuit Is Proprietary To Linear Technology And
Supplied For Use With Linear Technology Parts.
Maximum Io
5A
6A
C
D
LINEAR TECHNOLOGY CORPORATION
1630 McCARTHY BLVD.
MILPITAS, CA. 95035
408-432-1900
408-434-0507 FAX
Title
High Efficiency 48V Buck-Boost DC/DC Converter
Size
Date:
Document Number
Demo Circuit 1046A LTC3780EG, LTC4440ES6
Wednesday, August 23, 2006
Sheet
E
1
of
2
Rev
A
1
R23
0
(Opt.)
C35
3300pF
SW1
(Opt.)
2
C32
0.1uF
16V
(Opt.)
R25
10
(Opt.)
3
TS1
1
VCC BOOST
6
2
GND
5
INP
TG
4
TS
12V
D10
BAS516
2
R24
22K
C36
1000pF
R20
1K
2
1
1
ITH/RUN
C33
1uF
100V
Q6
Si7852DP
(Opt.)
TG1A
4
6
3
2
GND
VCC
5
R28
5.6K
1%
3
VFB
SENSE
4
3
R30
0.2
1206
Q7
Si7852DP
(Opt.)
4
Q8
Si7852DP
(Opt.)
C40
2.2uF
100V
2
5
6
7
8
5
6
7
8
BG1A
Q9
Si7852DP
(Opt.)
4
Q10
Si7852DP
(Opt.)
1
2
3
RSEN
1
2
3
4
Customer Notice
B
4
TS1
BG2A
LTC CONFIDENTIAL - FOR CUSTOMER USE ONLY
8
4
Q4
FDC2512
NGATE
5
6
7
8
5
6
7
8
C39
2.2uF
100V
TS2
1
5
1
1
2
3
2
7
VOUT
1
2
3
4
2
VIN
C38
1uF
16V
TG2A
T1
PA0648
2
R21
220K
R29
(Opt.)
Optional Power Components
(Do Not Stuff)
1
U4
LTC3803ES6
C37
100pF
R27
1K
VIN
A
VBIAS
C31
10uF
16V
D8
BAS516
R22
14K
C34
0.1uF
16V
(Opt.)
Q5
MMBT3904
(Opt.)
1
R26
2
(Opt.)
1
U3 (Opt.)
LTC4440ES6
3
VBIAS
Optional Bias Supply
(Stuff)
5
6
7
8
TG1
VBIAS
R35
0
(Opt.)
R19
(Opt.)
D9
MMDL770T1
(Opt.)
E
1
2
5
6
TG1A
D
1
2
3
Optional Top Driver For TG1
(Do Not Stuff)
C
3
4
B
4
A
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.
This Circuit Is Proprietary To Linear Technology And
Supplied For Use With Linear Technology Parts.
C
LINEAR TECHNOLOGY CORPORATION
1630 McCARTHY BLVD.
MILPITAS, CA. 95035
408-432-1900
408-434-0507 FAX
Title
1
High Efficiency 48V Buck-Boost DC/DC Converter
Size
Date:
Document Number
Demo Circuit 1046A
Wednesday, August 23, 2006
D
LTC3780EG,LTC4440ES6
Sheet
2
E
of
2
Rev
A
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