LTC3706
22
3706fd
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900
●
FAX: (408) 434-0507
●
www.linear.com
LINEAR TECHNOLOGY CORPORATION 2005
LT 0711 REV D • PRINTED IN USA
RELATED PARTS
TYPICAL APPLICATION
36V to 72V to 5V/20A Isolated Forward Converter
T2
1:2
3, 41
8
1µF
0.1µF
124k
100Ω
100Ω100Ω
0.002Ω
1W
100k
100k
15.0k
365k
2N7002
5, 6
1N4148W
536Ω
1k 1/4W
VA
VA
Si7336ADP
Si7336ADPSi7450DP
0.87µH
CMPSH1-4
MMBZ5236B
7.5V
5.1k
10pF
V
SW
••
GND
PGND
PHASE
FG
IS
GATE
NDRV
IS
GATE
NDRV
SW
SG
V
CC
NDRV
V
IN
MODE
REGSD
FS/SYNC
100k
SLP
6.2k
604Ω
1.2Ω
1/4W
2.2nF
3706 TA02
47pF
2.2µF
–V
OUT
+V
OUT
100µF
6.3V
×3
4.7µF
25V
1.0µF
100V
+V
IN
–V
IN
1.0µF
100V
×3
1nF
200V
220µF
6.3V
4.42k
510Ω
0.022Ω
1W
7
9
5
T1
3
4
2
•
•
•
2.4Ω
14W
V
SW
33nF
33nF
220µF 6.3V SANYO 6TPE220MI
2.2nF 250V MURATA GA343QR7GD222KW01L
L1: VISHAY IHLP-2525CZER1R0M-01
L2: COOPER HC1-R87
T1: PULSE PA0811 (4:4:2)
T2: PULSE PA0297 2(1.5mH):1:1
470nF
1µF
FDC2512
(SOT6)
470pF
FB/IN
+
FS/IN
–
SSFLT
UVLO LTC3725
V
CC
ITH
PT
+
LTC3706
FCX491
FB
PT
–
RUN/SS
IS
+
IS
–
+
330pF
330pF
3.01k
100Ω
1µH
2.2nF
250V
1.5nF
50V
PART NUMBER DESCRIPTION COMMENTS
LTC3726/LTC3725 Isolated Synchronous No Opto-Forward Controller Chip
Set
Ideal for Medium Power 24V or 48V Input Applications
LT1952/LT1952-1 Isolated Synchronous Forward Controllers Ideal for Medium Power 24V or 48V Input Applications
LTC3723-1/LTC3723-2 Synchronous Push-Pull and Full-Bridge Controllers High Efficiency with On-Chip MOSFET Drivers
LTC3721-1/LTC3721-2 Nonsynchronous Push-Pull and Full-Bridge Controllers Minimizes External Components, On-Chip MOSFET Drivers
LTC3722/LTC2722-2 Synchronous Isolated Full-Bridge Controllers Ideal for High Power 24V or 48V Input Applications
LT3748 100V No Opto-Flyback Controller 5V ≤ V
IN
≤ 100V, Boundary Mode Operation, MSOP-16 with Extra High
Voltage Pin Spacing
LT3758 Boost, Flyback, SEPIC and Inverting Controller 5.5V ≤ V
IN
≤ 100V, 100kHz to 1MHz Fixed Frequency,
3mm × 3mm DFN-10 and MSOP-10E Package
LTC1871/LTC1871-1
LTC1871-7
Wide Input Range, No R
SENSE
™ Low Quiescent Current
Flyback, Boost and SEPIC Controller
2.5V ≤ V
IN
≤ 36V, Burst Mode
®
Operation at Light Load, MSOP-10
LTC3803/LTC3803-3
LTC3803-5
Flyback DC/DC Controller with Fixed 200kHz or 300kHz
Operating Frequency
V
IN
and V
OUT
Limited Only by External Components, 6-Pin ThinSOT™
Package
LT3575 Isolated Flyback No Opto-Converter with 2.5A/60V
Power Switch
3V ≤ V
IN
≤ 40V, Boundary Mode, Up to 14W, TSSOP-16 Package
