Linear Technology LTC4226CUD-1 Demoboard : Dual Hot Swap Controller with Latch Off DC1627A-A DC1627A-A 数据表
产品代码
DC1627A-A
LTC4226
1
4226f
Typical applicaTion
FeaTures
DescripTion
Wide Operating Range
Dual Hot Swap Controller
The LTC
®
4226 dual Hot Swap™ controller allows two
power paths to be safely inserted and removed from a
live backplane or powered connector. Using N-channel
pass transistors, supply voltages ranging from 4.5V to
44V are ramped up at an adjustable rate.
Three selectable ratios of current limit to circuit breaker
Three selectable ratios of current limit to circuit breaker
threshold accommodate noisy loads and momentary high
peak currents without interruption, while a dual-rate fault
timer protects the MOSFET from extended output over-
current events. FAULT outputs indicate the circuit breaker
status. The LTC4226-1 remains off after a fault while the
LTC4226-2 automatically retries after a 0.5s delay.
The LTC4226 can also be configured as a bidirectional cur-
The LTC4226 can also be configured as a bidirectional cur-
rent limiter/circuit breaker. For high current applications,
two channels may be configured as parallel power paths.
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.
2 Port FireWire Application
Inrush after Load Connection
applicaTions
n
Allows Safe Board Insertion into Live Backplane
n
Selectable Current Limit and Dual-Rate Timer
Accommodate Load Surges
n
Fast Response Limits Peak Fault Current
n
Wide Operating Voltage Range: 4.5V to 44V
n
Optional Auto-Retry or Latchoff after
Overcurrent Fault
n
High Side Drive for External N-Channel MOSFET
n
Allows Parallel Power Paths for High Current
Applications
n
Available in 16-Pin QFN (3mm
× 3mm) and MSOP
Packages
n
Apple FireWire/IEEE 1394
n
Disk Drives
n
Rugged 12V, 24V Applications
n
Hot Board/Connector Insertion
n
Uni/Bidirectional Current Limiter/Circuit Breaker
SMCJ33A*
*36.7V TO 40.6V BV
FTMR1
GND
220nF
7V TO 33V
CURRENT
LIMIT
SELECT
30mΩ
SS3P5
FDMS86500DC
30mΩ
FDMS86500DC
220nF
FTMR2
ON1
V
CC1
SENSE1 GATE1
LTC4226-2
OUT1
V
CC2
SENSE2 GATE2
OUT2
FAULT1
CLS
FAULT2
ON2
CLS
FAULT2
ON2
PORT 1
1394
SOCKET
1394
PLUG
4226 TA01a
PORT 2
1394
SOCKET
1394
PLUG
4226 TA01b
1ms/DIV
V
CC
10V/DIV
V
OUT
10V/DIV
V
CC
= 12V
C
LOAD
= 1mF
I
OUT
1A/DIV
CABLE INSERTION
INRUSH
CURRENT