LT1680 Ver la hoja de datos (PDF) - Linear Technology
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LT1680 Datasheet PDF : 16 Pages
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LT1680
TYPICAL APPLICATION
– 48V to 5V 30W Forward Converter
INPUT
COM
– 48V
INPUT
+
+
24k
220µF*
220µF*
35V
35V
1µF
+
24k
220µF* +
220µF*
63V
35V
35V
*SANYO CV-GX
**SANYO OS-CON
ALL RESISTORS 1.4W, 1% UNLESS
INDICATED OTHERWISE
24k
1k
300pF
10Ω
T1
33Ω
MBR2045CT
1.5nF
L1
20µH
IRF640
MBR0520LT1
33Ω
1.5nF
MBR2045CT
+
0.033µF
330µF**
6.3V
0.015Ω
1W
5V
6A
OUT
50Ω
1W
OUTPUT
COM
4.22k
Q7
2N5401
BAV21
78.7k
1M
L1
+
0.1µF
220µF
35V
2N7000
20k
2N3904
4.75k
9
10
13
15
1
SENSE + SENSE –
11
RUN/SHDN
14
12VIN
GATE
SYNC
LT1680
SL/ADJ
7
VFB
5VREF CT IAVG
7.5k
16 2
3
1µF
SS VC
45
SGND PGND VREF
6 12 8
16k
20k
2.2nF
1nF 0.1µF
0.22µF
1k
0.1µF
L1: PHILIPS EFD20-3F3-E63-S
(CORE SET, AI = 63nH/T2)
OUTPUT 18T BIFILAR 22AWG
1.2k
BIAS 54T BIFILAR 32AWG
T1: COILTRONICS VP5-1200, 1:1:1:1:1:1
(SIX WINDINGS EACH 77µH)
1680 TA03
PACKAGE DESCRIPTION Dimensions in inches (millimeters) unless otherwise noted.
0.291 – 0.299**
(7.391 – 7.595)
0.010
(0.254
–
–
0.029
0.737)
×
45°
SW Package
16-Lead Plastic Small Outline (Wide 0.300)
(LTC DWG # 05-08-1620)
0.093 – 0.104
(2.362 – 2.642)
0.037 – 0.045
(0.940 – 1.143)
0.398 – 0.413*
(10.109 – 10.490)
16 15 14 13 12 11 10 9
0° – 8° TYP
0.009 – 0.013
(0.229 – 0.330)
NOTE:
NOTE 1
0.016 – 0.050
(0.406 – 1.270)
0.050
(1.270)
TYP
0.014 – 0.019
(0.356 – 0.482)
TYP
0.004 – 0.012 NOTE 1
(0.102 – 0.305)
1. PIN 1 IDENT, NOTCH ON TOP AND CAVITIES ON THE BOTTOM OF PACKAGES ARE THE MANUFACTURING OPTIONS.
THE PART MAY BE SUPPLIED WITH OR WITHOUT ANY OF THE OPTIONS
*DIMENSION DOES NOT INCLUDE MOLD FLASH. MOLD FLASH SHALL NOT EXCEED 0.006" (0.152mm) PER SIDE
**DIMENSION DOES NOT INCLUDE INTERLEAD FLASH. INTERLEAD FLASH SHALL NOT EXCEED 0.010" (0.254mm) PER SIDE
0.394 – 0.419
(10.007 – 10.643)
123 45678
S16 (WIDE) 0396
RELATED PARTS
PART NUMBER
LT1268
LT1270A
LT1339
LT1370
LT1371
DESCRIPTION
7.5A, 150kHz Switching Regulator
10A, 60kHz Switching Regulator
High Power Synchronous DC/DC Controller
500kHz, 6A Boost Switching Regulator
500kHz, 3A Boost Switching Regulator
16 Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417 q (408) 432-1900
FAX: (408) 434-0507q TELEX: 499-3977 q www.linear-tech.com
COMMENTS
Integrated Switch Can Be Used in Isolated Flyback Mode
Integrated Switch Can Be Used in Isolated Flyback Mode
Operation to 60V, No Shoot-Through N-Channel Output Drivers
Integrated Switch, Regulates Positive or Negative Outputs
Integrated Switch, Regulates Positive or Negative Outputs
1680f LT/TP 0298 4K • PRINTED IN USA
© LINEAR TECHNOLOGY CORPORATION 1997
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