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LTC4229

更新时间： 2024-11-22 14:57:59
品牌 Logo 应用领域
亚德诺 - ADI 控制器二极管
页数 文件大小 规格书
28页 407K
描述
理想二极管和热插拔控制器

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中文翻译

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LTC4229 数据手册

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LTC4229  
Ideal Diode and  
Hot Swap Controller  
FeaTures  
DescripTion  
Ideal Diode and Inrush Current Control for  
The LTC®4229 offers ideal diode and Hot Swap™ functions  
forapowerrailbycontrollingtwoexternalN-channelMOS-  
FETs. The MOSFET acting as an ideal diode replaces a high  
power Schottky diode and the associated heat sink, saving  
power and board area. The Hot Swap MOSFET control al-  
lows a board to be safely inserted and removed from a live  
backplane by limiting inrush current. The supply output is  
alsoprotectedagainstshort-circuitfaultswithafastacting  
foldback current limit and electronic circuit breaker.  
n
Redundant Supplies  
n
Low Loss Replacement for Power Schottky Diode  
n
Protects Output Voltage from Input Brownouts  
n
Allows Safe Hot Swapping from a Live Backplane  
n
2.9V to 18V Operating Range  
n
Controls Back-to-Back N-Channel MOSFETs  
n
Limits Peak Fault Current in ≤1µs  
n
Adjustable Current Limit with Foldback  
n
Adjustable Start-Up and Current Limit Fault Delay  
The LTC4229 regulates the forward voltage drop across  
the external MOSFET to ensure smooth current transfer  
in diode-OR applications. The ideal diode turns on quickly  
to reduce the load voltage droop during supply switcho-  
ver. If the input supply fails or is shorted, a fast turn-off  
minimizes reverse-current transients.  
n
0.5µs Ideal Diode Turn-On and Turn-Off Time  
n
Undervoltage and Overvoltage Protection  
n
Status, Fault and Power Good Outputs  
n
Pin Selectable Latch Off or Automatic Retry  
After Fault  
n
24-Lead 4mm × 5mm QFN and SSOP Packages  
The LTC4229 provides adjustable start-up delay, under-  
voltage and overvoltage protection, and reports fault and  
power good status for the supply. It can be configured  
for latch off or automatic retry after a fault.  
applicaTions  
n
Redundant Power Supplies  
n
Supply Holdup  
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.  
n
High Availability Systems and Servers  
n
Protected by U.S. Patents, including 7920013, 8022679.  
Telecom and Network Infrastructure  
n
Power Prioritizer  
Typical applicaTion  
Plug-In Supply Card Application  
PLUG-IN  
SUPPLY  
Diode FET Protects Output  
DIODE FET  
SiR818DP  
HOT SWAP FET  
SiR818DP  
CARD  
0.0025Ω  
Voltage from Input Brownout  
V
OUT  
7.6A  
12V  
+
680µF  
IN  
10Ω  
1k  
0.1µF  
10V/DIV  
10nF  
OUT  
10V/DIV  
+
–
CPO DSRC IN DGATE DSNS SENSE SENSE HGATE  
OUT  
15k  
2k  
DGATE  
20V/DIV  
FB  
21.5k  
1.1k  
2k  
HGATE  
20V/DIV  
UV  
LTC4229  
PWRGD  
FAULT  
DSTAT  
DFLT  
4229 TA01b  
50µs/DIV  
OV  
EN  
DOFF GND DCFG  
INTV  
RTMR DTMR  
FTMR  
CC  
0.1µF  
0.1µF  
BACKPLANE  
4229 TA01a  
4229f  
1
For more information www.linear.com/LTC4229  
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