Linear Technology DC1203A - LTC4357 Positive High Voltage Ideal Diode Controller DC1203A DC1203A Fiche De Données
Codes de produits
DC1203A
LTC4357
4357fd
Features
applications
Description
Positive High Voltage
Ideal Diode Controller
The LTC
®
4357 is a positive high voltage ideal diode control-
ler that drives an external N-channel MOSFET to replace a
Schottky diode. When used in diode-OR and high current
diode applications, the LTC4357 reduces power consump-
tion, heat dissipation, voltage loss and PC board area.
The LTC4357 easily ORs power sources to increase total
The LTC4357 easily ORs power sources to increase total
system reliability. In diode-OR applications, the LTC4357
controls the forward voltage drop across the MOSFET to
ensure smooth current transfer from one path to the other
without oscillation. If the power source fails or is shorted,
a fast turn-off minimizes reverse current transients.
48V, 10A Diode-OR
n
Reduces Power Dissipation by Replacing a Power
Schottky Diode with an N-Channel MOSFET
n
0.5µs 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
Available in 6-Lead (2mm
× 3mm) DFN and
8-Lead MSOP Packages
n
N + 1 Redundant Power Supplies
n
High Availability Systems
n
AdvancedTCA Systems
n
Telecom Infrastructure
n
Automotive Systems
4357 TA01
LTC4357
GND
IN
OUT
V
DD
GATE
FDB3632
V
INA
48V
V
OUT
TO LOAD
LTC4357
GND
IN
OUT
V
DD
GATE
FDB3632
V
INB
48V
*SEE FIGURES 2 AND 3 FOR ADDITIONAL OPTIONAL COMPONENTS
Power Dissipation vs Load Current
typical application
CURRENT (A)
0
0
POWER DISSIP
ATION (W)
1
2
3
4
5
6
2
4
6
8
4357 TA01b
10
DIODE (MBR10100)
FET (FDB3632)
POWER
SAVED
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, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and
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property of their respective owners.