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参数资料
| 型号： | LTC4227CUFD-1#PBF |
| 厂商： | LINEAR TECHNOLOGY CORP |
| 元件分类： | 电源管理 |
| 英文描述： | POWER SUPPLY MANAGEMENT CKT, PQCC20 |
| 封装： | 4 X 5 MM, LEAD FREE, PLASTIC, MO-220, QFN-20 |
| 文件页数： | 1/20页 |
| 文件大小： | 307K |
| 代理商： | LTC4227CUFD-1#PBF |
LTC4227-1/LTC4227-2
1
422712f
Typical applicaTion
FeaTures
DescripTion
Dual Ideal Diode and
Single Hot Swap Controller
The LTC4227 offers ideal diode and Hot Swap func-
tions for two power rails by controlling external N-channel
MOSFETs. MOSFETs acting as ideal diodes replace two
high power Schottky diodes and the associated heat sinks,
saving power and board area. A Hot Swap control MOSFET
allows a board to be safely inserted and removed from
a live backplane by limiting inrush current. The supply
output is also protected against short-circuit faults with a
fast acting current limit and internal timed circuit breaker.
The LTC4227 regulates the forward voltage drop across
the MOSFETs to ensure smooth current transfer from one
supply to the other without oscillation. The ideal diodes
turn on quickly to reduce the load voltage droop during
supply switchover. If the input supply fails or is shorted,
a fast turn-off minimizes reverse-current transients.
The LTC4227 allows turn-on/off control, and reports fault
and power good status for the supply. The LTC4227-1
features a latch-off circuit breaker, while the LTC4227-2
provides automatic retry after a fault.
Diode-OR with Hot Swap Application
applicaTions
n
Power Path and Inrush Current Control for
Redundant Supplies
n
Low Loss Replacement for Power Schottky Diodes
n
Allows Safe Hot Swapping from a Live Backplane
n
2.9V to 18V Operating Range
n
Controls N-Channel MOSFETs
n
Limits Peak Fault Current in ≤1s
n
0.5s Turn-On and Reverse Turn-Off Time
n
Adjustable Current Limit with Circuit Breaker
n
Smooth Switchover without Oscillation
n
Adjustable Current Limit Fault Delay
n
Fault and Power Status Output
n
LTC4227-1: Latch Off After Fault
n
LTC4227-2: Automatic Retry After Fault
n
20-Lead 4mm
× 5mm QFN and
16-Lead SSOP Packages
n
Redundant Power Supplies
n
Supply Holdup
n
Computer Systems and Servers
n
Telecom Networks
L
, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear
Technology Corporation. Hot Swap is a trademark of Linear Technology Corporation. All other
trademarks are the property of their respective owners.
BACKPLANE
CONNECTOR
12V
CARD
CONNECTOR
CPO1
D2ON
ON
FAULT
PWRGD
137k
100F
12V
7.6A
20k
INTVCC
GND
IN1 DGATE1
DGATE2
LTC4227
422712 TA01a
SiR462DP
Si7336ADP
0.006
HGATE OUT
SENSE+ SENSE–
CPO2
0.1F
IN2
+
0.1F
SiR462DP
EN
0.1F
TMR
Power Dissipation
vs Load Current
LOAD CURRENT (A)
0
POWER
DISSIP
ATION
(W)
0.5
1.0
1.5
2.0
2.5
3.0
2
4
6
8
4227 TA01
DIODE
(SBG1025L)
MOSFET
(SiR462DP)
POWER SAVED
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LTC4227CUFD-2#PBF | 功能描述:IC CTRLR HOT SWAP 20-QFN RoHS:是 类别:集成电路 (IC) >> PMIC - 热交换 系列:- 产品培训模块:Obsolescence Mitigation Program 标准包装:100 系列:- 类型:热插拔开关 应用:通用 内部开关:是 电流限制:可调 电源电压:9 V ~ 13.2 V 工作温度:-40°C ~ 150°C 安装类型:表面贴装 封装/外壳:10-WFDFN 裸露焊盘 供应商设备封装:10-TDFN-EP（3x3） 包装:管件 |
| LTC4227CUFD-2#TRPBF | 功能描述:IC CTRLR HOT SWAP 20-QFN RoHS:是 类别:集成电路 (IC) >> PMIC - 热交换 系列:- 产品培训模块:Obsolescence Mitigation Program 标准包装:100 系列:- 类型:热插拔开关 应用:通用 内部开关:是 电流限制:可调 电源电压:9 V ~ 13.2 V 工作温度:-40°C ~ 150°C 安装类型:表面贴装 封装/外壳:10-WFDFN 裸露焊盘 供应商设备封装:10-TDFN-EP（3x3） 包装:管件 |
| LTC4227CUFD-3#PBF | 制造商:Linear Technology 功能描述:IC CTRLR HOT SWAP 20QFN 制造商:Linear Technology 功能描述:HOT SWAP CONTROLLER 2.9-18V 制造商:Linear Technology 功能描述:DIODE-OR/HOT SWAP CTRL, 18V, QFN-20, IC Function:Diode-OR and Hot Swap Controlle |
| LTC4227CUFD-3#TRPBF | 制造商:Linear Technology 功能描述:IC CTRLR HOT SWAP 20QFN 制造商:Linear Technology 功能描述:DIODE-OR/HOT SWAP CTRL, 18V, QFN-20, IC Function:Diode-OR and Hot Swap Controlle |
| LTC4227CUFD-4#PBF | 制造商:Linear Technology 功能描述:IC CTRLR HOT SWAP 20QFN 制造商:Linear Technology 功能描述:HOT SWAP CONTROLLER 2.9-18V 制造商:Linear Technology 功能描述:DIODE-OR/HOT SWAP CTRL, 18V, QFN-20, IC Function:Diode-OR and Hot Swap Controlle |
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