DC736A - Schematic

4
3
2
This circuit is proprietary to Linear Technology and supplied
for use with Linear Technology parts.
Customer Notice: Linear Technology has made a best effort to
design a circuit that meets customer-supplied specifications;
however, it remains the customers 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
Applications Engineering for assistance.
E1
4
5
R1
1M
0805
JP1
C1
1
3
SHDN
BURST MODE
1
C3
R4
R14
470
4
5
VFB
6
VC
7
8
R8
93.1k
1%
R9
2.21k
1%
D5
1N4148WS
C12
0.01µF
3
402k
1%
3
R7
4.99k
1%
1
2
1000pF
10%
BURST_EN
R6
1M
0603
U1
LT3724EFE
1000pF
100V
R3
52.3k
1%
VCC
2
12/9/03
Ying Cheng
June 18, 2012
08/03/05
B
GND
2 SHDN
FIXED FREQ.
"VIN" 60V to 55V, "D2" to 30BQ060
L1= DO5040H-473MLB (Sch & BoM Only)
DATE
D. Canny
CIN3
2.2µF
100V
CIN2
2.2µF
100V
RUN
JP2
1st PROTOTYPE
VIN
C6
120pF
VIN
BOOST
NC
TG
SHDN
SW
CSS
NC
BURST_EN VCC
VFB
PGND
VC
GND
SENSE+
Sgnd
E2
GND
1
-
SENSE-
R2
16
15 0 Ohm
14
C2
0.22µF
10%
Q1
Si7852DP
VOUT
L1
R5
SW
13
12
VCC
D1
BAS19
11
10
9
47µH
DO5040H-473MLB
COILCRAFT
C4
0.1µF
10%
C5
1µF
10%
E3
VOUT
24V @ 3A
VOUT
0.025
1%
0.5W
+
D2
30BQ060
COUT1
330µF
35V
COUT2
22µF
25V
COUT3
22µF
25V
GND
E4
GND
17
CIN1
+ 68µF
63V
B
ECO REV
VIN
VIN
30V - 55V
1
REVISION HISTORY
DESCRIPTION
APPROVED
C7
1500pF
R15
47k
A
NOTES: UNLESS OTHERWISE SPECIFIED
OPTIONAL BOOST BIAS CIRCUIT
(DO NOT INSTALL)
VCC
0 Ohm
C10
220pF
R11
107k
1%
R12
10k
R13
12.4k
1%
3
STAND-OFF
VCC
L2
1
5
SW
VIN
FB
SHDN
GND
D4
ZHCS400
(Opt)
C8
4.7µF,6.3V
0805
4
U2
LT1613CS5
+
C11
22µF
35V
(Opt)
LTC CONFIDENTIAL - For Customer Use Only
E5 VBIAS
9V-20V
(Opt)
UNLESS OTHERWISE SPECIFIED
DIMENSIONS ARE IN INCHES
TOLERANCE ON ANGLE - - 2 PLACES - - - 3 PLACES - - INTERPRET DIM AND TOL
PER ASME Y14.5M -1994
CONTRACT NO.
APPROVALS
THIRD ANGLE PROJECTION
2
12/9/03
CHECKED-
-
APPROVED-
-
ENGINEER D. CANNY
12/9/03
June 18, 2012
DO NOT SCALE DRAWING
3
2
DATE
DRAWN RB
DESIGNER -
4
A
10µH
ZHCS400
C9
1µF
16V
2. INSTALL SHUNT ON JP1 PIN 1 AND 2, JP2 PIN 1 AND 2.
VOUT
D3
R10
1. ALL RESISTORS ARE IN OHMS, 0402; AND ALL CAPACITORS ARE IN MICROFARAD, 0402.
-
TECHNOLOGY
1630 McCarthy Blvd.
Milpitas, CA 95035
Phone: (408)432-1900
Fax: (408)434-0507
TITLE
SCH, HIGH VOLTAGE STEP-DOWN CONTROLLER
SIZE
CAGE CODE
SCALE: NONE
DWG NO
REV
DC736A
FILENAME: 736A_Rev4.DSN
1
SHEET
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