datasheetbank_Logo
Integrated circuits, Transistor, Semiconductors Search and Datasheet PDF Download Site

4355 View Datasheet(PDF) - Linear Technology

Part Name
Description
View to exact match
4355 Datasheet PDF : 20 Pages
1 2 3 4 5 6 7 8 9 10 Next Last
LTC4355
FEATURES
Positive High Voltage
Ideal Diode-OR with Input Supply
and Fuse Monitors
DESCRIPTION
n Replaces Power Schottky Diodes
n Controls N-Channel MOSFETs
n 0.3μs Turn-Off Time Limits Peak Fault Current
n Wide Operating Voltage Range: 9V to 80V
n Smooth Switchover without Oscillation
n No Reverse DC Current
n Monitors VIN, Fuse, and MOSFET Diode
n Available in 14-Lead (4mm × 3mm) DFN,
16-Lead MS and SO Packages
APPLICATIONS
n High Availability Systems
n AdvancedTCA® (ATCA) Systems
n +48V and –48V Distributed Power Systems
n Telecom Infrastructure
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and
Hot Swap is a trademark of Linear Technology Corporation. All other trademarks are the
property of their respective owners.
The LTC®4355 is a positive voltage ideal diode-OR control-
ler that drives two external N-channel MOSFETs. Forming
the diode-OR with N-channel MOSFETs instead of Schottky
diodes reduces power consumption, heat dissipation and
PC board area.
With the LTC4355, power sources can easily be ORed
together to increase total system reliability. The LTC4355
can diode-OR two positive supplies or the return paths of
two negative supplies, such as in a –48V system.
In the forward direction the LTC4355 controls the volt-
age drop across the MOSFET to ensure smooth current
transfer from one path to the other without oscillation. If
a power source fails or is shorted, fast turnoff minimizes
reverse current transients.
Power fault detection indicates if the input supplies are
not in regulation, the inline fuses are blown, or the volt-
ages across the MOSFETs are greater than the fault
threshold.
TYPICAL APPLICATION
VIN1 = +48V
VIN2 = +48V
+48V Diode-OR
7A
FDB3632
7A
FDB3632
TO
LOAD
22k
22k
22k
340k 340k
IN1 GATE1 IN2 GATE2 OUT
MON1
SET
MON2
LTC4355
GND
VDSFLT
FUSEFLT1
FUSEFLT2
PWRFLT1
PWRFLT2
12.7k 12.7k
GND
GREEN LEDs
PANASONIC LN1351C
22k
22k
4355 TA01
Power Dissipation vs Load Current
6
5
DIODE (MBR10100)
4
3
POWER
SAVED
2
1
FET (FDB3632)
0
0
2
4
6
8
10
CURRENT (A)
4355 TA02
4355fe
1
 

Share Link: 

datasheetbank.com [ Privacy Policy ] [ Request Datasheet ] [ Contact Us ]