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LTC4235CUFD-2#TRPBF PDF预览

LTC4235CUFD-2#TRPBF

更新时间： 2024-01-23 15:07:12
品牌 Logo 应用领域
凌特 - Linear /
页数 文件大小 规格书
22页 534K
描述
LTC4235 - Dual 12V Ideal Diode-OR and Single Hot Swap Controller with Current Monitor; Package: QFN; Pins: 20; Temperature Range: 0°C to 70°C

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LTC4235CUFD-2#TRPBF 技术参数

是否无铅： 含铅是否Rohs认证： 符合
生命周期：Active包装说明：HVQCCN, LCC20,.16X.2,20
针数：20Reach Compliance Code：compliant
风险等级：5.7可调阈值：YES
模拟集成电路 - 其他类型：POWER SUPPLY SUPPORT CIRCUITJESD-30 代码：R-PQCC-N20
长度：5 mm功能数量：2
端子数量：20最高工作温度：70 °C
最低工作温度：封装主体材料：PLASTIC/EPOXY
封装代码：HVQCCN封装等效代码：LCC20,.16X.2,20
封装形状：RECTANGULAR封装形式：CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE
峰值回流温度（摄氏度）：NOT SPECIFIED座面最大高度：0.8 mm
最大供电电流 (Isup)：4 mA最大供电电压 (Vsup)：14 V
最小供电电压 (Vsup)：9 V标称供电电压 (Vsup)：12 V
表面贴装：YES技术：CMOS
温度等级：COMMERCIAL端子形式：NO LEAD
端子节距：0.5 mm端子位置：QUAD
处于峰值回流温度下的最长时间：NOT SPECIFIED宽度：4 mm
Base Number Matches：1

LTC4235CUFD-2#TRPBF 数据手册

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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 SwapTM  
functions for two 12V power rails by controlling external  
n
Ideal Diode-OR and Inrush Current Control for  
Redundant Supplies  
n
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  
n
n
9V to 14V Operation  
n
n
n
n
n
n
n
n
n
n
n
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  
n
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.  
n
n
Typical applicaTion  
Ideal Diode-OR with Hot Swap Application  
Smooth Supply Switchover  
SiR158DP  
12V  
12V  
IN2  
0.1µF  
SiR158DP  
0.003Ω  
SiR158DP  
IN1  
12V  
7A  
IN1  
1V/DIV  
+
0.1µF  
0.1µF  
C
IN2  
1V/DIV  
LOAD  
I
IN1  
+
–
13.7k  
CPO1 IN1 DGATE1 CPO2  
IN2 DGATE2  
REG SENSE SENSE HGATE OUT  
2A/DIV  
ON  
FAULT  
I
IN2  
2k  
2A/DIV  
LTC4235  
PWRGD  
4235 TA01b  
200ms/DIV  
IMON  
ADC  
EN  
INTV  
CC  
GND  
D2OFF  
FTMR  
0.1µF  
0.1µF  
4235 TA01a  
4235f  
1
For more information www.linear.com/LTC4235  
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