Datasheet > LTC4227

LTC4227

更新时间： 2023-12-20 18:46:18

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
22页	688K
描述
双通道理想二极管和单通道热插拔控制器

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LTC4227 数据手册

LTC4227

Dual Ideal Diode and

Single Hot Swap Controller

FeaTures

DescripTion

The LTC^®4227 offers ideal diode-OR and Hot Swap™

functions for two power rails by controlling external N-

channelMOSFETs.MOSFETsactingasidealdiodesreplace

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

fromalivebackplanebylimitinginrushcurrent.Thesupply

output is also protected against short-circuit faults with a

fast acting current limit and internal timed circuit breaker.

Power Path and Inrush Current Control for

Redundant Supplies

Low Loss Replacement for Power Schottky Diodes

Allows Safe Hot Swapping from a Live Backplane

2.9V to 18V Operating Range

Controls N-Channel MOSFETs

Limits Peak Fault Current in ≤1µs

0.5µs Ideal Diode Turn-On and Reverse Turn-Off Time

Adjustable Current Limit with Circuit Breaker

Smooth Switchover without Oscillation

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.

Adjustable Current Limit Fault Delay

Fault and Power Status Output

20-Lead 4mm × 5mm QFN and 16-Lead SSOP Packages

applicaTions

Redundant Power Supplies and Supply Holdup

The LTC4227 allows turn-on/off control, and reports fault

and power good status for the supply.

Computer Systems and Servers

Telecom Networks

PART

OVERCURRENT FAULT

LATCH OFF

RETRY

START-UP DELAY

100ms

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.

LTC4227-1

LTC4227-2

LTC4227-3

LTC4227-4

100ms

LATCH OFF

RETRY

1.6ms

Typical applicaTion

Diode-OR with Hot Swap Application

SiR462DP

Smooth Supply Switchover

12V

0.1µF

SiR462DP

0.006Ω

Si7336ADP

12V

7.6A

0.1µF

100µF

IN1

1V/DIV

–

137k

CPO1 IN1 DGATE1 CPO2

IN2 DGATE2 SENSE SENSE HGATE OUT

IN2

1V/DIV

IN1

FAULT

20k

2A/DIV

LTC4227

PWRGD

IN2

2A/DIV

INTV

0.1µF

D2ON

GND

TMR

4227 TA01b

4227 TA01a

200ns/DIV

0.1µF

BACKPLANE CARD

CONNECTOR CONNECTOR

422712fa

For more information www.linear.com/LTC4227

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