Datasheet > LTC4235

LTC4235

更新时间： 2023-12-20 18:44:01

品牌	Logo	应用领域
亚德诺 - ADI		控制器监视器二极管
页数	文件大小	规格书
22页	490K
描述
具电流监视器的双通道 12V 理想二极管 “或” 和单通道热插拔控制器

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LTC4235 数据手册

LTC4235

Dual 12V Ideal Diode-OR

and Single Hot Swap Controller

with Current Monitor

FeaTures

DescripTion

The LTC^®4235 offers ideal diode-OR and Hot Swap^TM

functions for two 12V power rails by controlling external

Ideal Diode-OR and Inrush Current Control for

Redundant Supplies

N-channel MOSFETs. MOSFETs acting as ideal diodes

replace two high power Schottky diodes and the associ-

ated 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 foldback current limit and circuit breaker.

Low Loss Replacement for Power Schottky Diodes

Enables Safe Board Insertion into a Live Backplane

9V to 14V Operation

Current Monitor Output

Controls N-Channel MOSFETs

Limits Peak Fault Current in ≤ 1µs

Adjustable Current Limit with Foldback

Adjustable Current Limit Fault Delay

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

Smooth Switchover without Oscillation

Fault and Power Good Outputs

LTC4235-1: Latch Off After Fault

LTC4235-2: Automatic Retry After Fault

20-Pin 4mm x 5mm QFN Package

The LTC4235 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.

A current sense amplifier translates the voltage across the

senseresistortoagroundreferencedsignal.TheLTC4235

allows turn-on/off control, and reports fault and power

good status for the supply.

applicaTions

Redundant Power Supplies

High Availability Systems and Servers

Telecom and Network Infrastructure

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. Protected by U.S. Patents, including 7920013, 8022679.

Typical applicaTion

Ideal Diode-OR with Hot Swap Application

Smooth Supply Switchover

SiR158DP

12V

IN2

0.1µF

SiR158DP

0.003Ω

SiR158DP

IN1

12V

IN1

1V/DIV

0.1µF

IN2

1V/DIV

LOAD

IN1

–

13.7k

CPO1 IN1 DGATE1 CPO2

IN2 DGATE2

REG SENSE SENSE HGATE OUT

2A/DIV

FAULT

IN2

2A/DIV

LTC4235

PWRGD

4235 TA01b

200ms/DIV

IMON

ADC

INTV

GND

D2OFF

FTMR

0.1µF

4235 TA01a

4235f

For more information www.linear.com/LTC4235

12 3 4 5 6 7...22

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与LTC4235相关器件

型号	品牌	描述	获取价格	数据表
LTC4235CUFD-2#TRPBF	Linear	LTC4235 - Dual 12V Ideal Diode-OR and Single Hot Swap Controller with Current Monitor; Pac	获取价格
LTC4235IUFD-1#TRPBF	Linear	LTC4235 - Dual 12V Ideal Diode-OR and Single Hot Swap Controller with Current Monitor; Pac	获取价格
LTC4235IUFD-2#TRPBF	Linear	LTC4235 - Dual 12V Ideal Diode-OR and Single Hot Swap Controller with Current Monitor; Pac	获取价格
LTC4236	Linear	Dual Ideal Diode-OR and Single Hot Swap Controller with Current Monitor	获取价格
LTC4236	ADI	具电流监视器的双通道理想二极管 “或” 和单通道热插拔控制器	获取价格
LTC4236-1	Linear	Dual Ideal Diode-OR and Single Hot Swap Controller with Current Monitor	获取价格

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