Linear Technology LTC4353DE Demoboard, Dual Low Voltage Ideal Diode Controller DC1926A DC1926A Fiche De Données
Codes de produits
DC1926A
LTC4353
1
4353f
Typical applicaTion
FeaTures
DescripTion
Dual Low Voltage
Ideal Diode Controller
The LTC
®
4353 controls external N-channel MOSFETs to
implement an ideal diode function. It replaces two high
power Schottky diodes and their associated heat sinks,
saving power and board area. The ideal diode function
permits low loss power supply ORing and supply holdup
applications.
The LTC4353 regulates the forward-voltage drop across
The LTC4353 regulates the forward-voltage drop across
the MOSFET to ensure smooth current transfer in diode-OR
applications. A fast turn-on reduces the load voltage
droop during supply switchover. If the input supply fails
or is shorted, a fast turn-off minimizes reverse-current
transients.
The controller operates with supplies from 2.9V to 18V. If
The controller operates with supplies from 2.9V to 18V. If
both supplies are below 2.9V, an external supply is needed
at the V
CC
pin. Enable inputs can be used to turn off the
MOSFET and put the controller in a low current state.
Status outputs indicate whether the MOSFETs are on or off.
2.9V to 18V, 10A Ideal Diode-OR
Output Maintained with Failing Input Supply
applicaTions
n
Low Loss Replacement for Power Diodes
n
Controls N-Channel MOSFETs
n
0V to 18V Supply ORing or Holdup
n
1µs Gate Turn-On and Turn-Off Time
n
Enable Inputs
n
MOSFET On-Status Outputs
n
16-Lead MSOP and DFN (4mm × 3mm) Packages
n
Redundant Power Supplies
n
Supply Holdup
n
High Availability Systems and Servers
n
Telecom and Network Infrastructure
L
, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and
Hot Swap, PowerPath and ThinSOT are trademarks of Linear Technology Corporation. All other
trademarks are the property of their respective owners. Protected by U.S. Patents, including
7920013 and 8022679.
Si4126DY
Si4126DY
GATE1
CPO1
CPO2
GND
EN1
EN2
4353 TA01a
2.9V TO 18V
2.9V TO 18V
*OPTIONAL FOR FAST TURN-ON
0.1µF
V
OUT
10A
56nF*
56nF*
V
IN1
V
CC
ONST1
ONST2
OUT1
OUT2
MOSFET
ON-STATUS
OUTPUTS
GATE2
V
IN2
LTC4353
5µs/DIV
VOL
TAGE 2V
/DIV
4353 TA01b
V
IN1
= 5.2V
V
IN2
= 5V
I
L
= 8A
C
L
= 100µF
V
IN1
V
IN2
V
OUT