Linear Technology DC1066A - LTC4355 Demoboard: Positive High Voltage Ideal Diode-OR DC1066A DC1066A 数据表
产品代码
DC1066A
LTC4355
1
4355ff
Features
applications
Description
Positive High Voltage
Ideal Diode-OR with Input Supply
and Fuse Monitors
The
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
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-
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
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.
+48V Diode-OR
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 V
IN
, Fuse, and MOSFET Diode
n
Available in 14-Lead (4mm
× 3mm) DFN,
16-Lead MS and SO Packages
n
High Availability Systems
n
AdvancedTCA
®
(ATCA) Systems
n
+48V and –48V Distributed Power Systems
n
Telecom Infrastructure
Power Dissipation vs Load Current
typical application
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.
4355 TA01
LTC4355
GND
GATE1
GATE2
IN1
OUT
IN2
MON1
MON2
SET
12.7k
340k
12.7k
340k
7A
22k
22k
22k
22k
22k
GREEN LEDs
PANASONIC LN1351C
7A
GND
FDB3632
FDB3632
TO
LOAD
V
IN1
= +48V
V
IN2
= +48V
VDSFLT
FUSEFLT1
FUSEFLT2
PWRFLT1
PWRFLT2
FUSEFLT2
PWRFLT1
PWRFLT2
CURRENT (A)
0
0
POWER DISSIPATION (W)
1
2
3
4
5
6
2
4
6
8
4355 TA02
10
DIODE (MBR10100)
FET (FDB3632)
POWER
SAVED