參數(shù)資料
型號： LTC4211IMS8
廠商： Linear Technology
文件頁數(shù)： 23/40頁
文件大?。?/td> 321K
描述： IC CONTROLLER HOT SWAP 8-MSOP
標(biāo)準(zhǔn)包裝： 50
類型： 熱交換控制器
應(yīng)用： 通用
內(nèi)部開關(guān)： 無
電源電壓： 2.5 V ~ 16.5 V
工作溫度： -40°C ~ 85°C
安裝類型： 表面貼裝
封裝/外殼： 8-TSSOP，8-MSOP（0.118"，3.00mm 寬）
供應(yīng)商設(shè)備封裝： 8-MSOP
包裝： 管件
LTC4211
23
4211fb
OPERATION
The maximum load current that trips the circuit breaker
is given in Equation 12.
TRIP(MAX)
=
V
CB(MAX)
R
SENSE MIN
=
60mV
R
SENSE MIN
 
(12)
where
   
 
R
SENSE(MIN)
=R
SENSE(NOM)
1
R
TOL
100
?/DIV>
?/DIV>
?/DIV>
?/DIV>
?/DIV>
?/DIV>
?/DIV>
?/DIV>
?/DIV>
?/DIV>
?/DIV>
?/DIV>
?/DIV>
?/DIV>
For example:
If a sense resistor with 7m??% R
TOL
 is used for current
limiting, the nominal trip current I
TRIP(NOM)
 = 7.1A. From
Equations 11 and 12, I
TRIP(MIN)
 = 5.4A and I
TRIP(MAX)
 =
9.02A respectively.
For proper operation and to avoid the circuit breaker trip-
ping unnecessarily, the minimum trip current (I
TRIP(MIN)
)
must exceed the circuits maximum operating load current.
For reliability purposes, the operation at the maximum
trip current (I
TRIP(MAX)
) must be evaluated carefully. If
necessary, two resistors with the same R
TOL
 can be con-
nected in parallel to yield an R
SENSE(NOM)
 value that fits
the circuit requirements.
POWER MOSFET SELECTION CRITERIA
To start the power MOSFET selection process, choose the
maximum drain-to-source voltage, V
DS(MAX)
, and the maxi-
mum drain current, I
D(MAX)
 of the MOSFET. The V
DS(MAX)
 
rating must exceed the maximum input supply voltage
(including surges, spikes, ringing, etc.) and the I
D(MAX)
 
rating must exceed the maximum short-circuit current in
the system during a fault condition. In addition, consider
three other key parameters: 1) the required gate-source
(V
GS
) voltage drive, 2) the voltage drop across the drain-
to-source on resistance, R
DS(ON)
 and 3) the maximum
junction temperature rating of the MOSFET.
Power MOSFETs are classified into three categories:
standard MOSFETs (R
DS(ON)
  specified at V
GS
  = 10V)
logic-level MOSFETs (R
DS(ON)
 specified at V
GS
 = 5V), and
sub-logic-level MOSFETs (R
DS(ON)
 specified at V
GS
 = 2.5V).
The absolute maximum rating for V
GS
 is typically ?0V for
standard MOSFETs. However, the V
GS
 maximum rating for
logic-level MOSFETs ranges from ?V to ?0V depend-
ing upon the manufacturer and the specific part number.
The LTC4211s GATE overdrive as a function of V
CC
 is
illustrated in the Typical Performance curves. Logic-level
and sub-logic-level MOSFETs are recommended for low
supply voltage applications and standard MOSFETs can
be used for applications where supply voltage is greater
than 4.75V.
Note that in some applications, the gate of the external
MOSFET can discharge faster than the output voltage
when the circuit breaker is tripped. This causes a nega-
tive V
GS
 voltage on the external MOSFET. Usually, the
selected external MOSFET should have a 盫
GS(MAX)
 rat-
ing that is higher than the operating input supply voltage
to ensure that the external MOSFET is not destroyed by
a negative V
GS
 voltage. In addition, the 盫
GS(MAX)
 rating
of the MOSFET must be higher than the gate overdrive
voltage. Lower 盫
GS(MAX)
 rating MOSFETs can be used
with the LTC4211 if the GATE overdrive is clamped to a
lower voltage. The circuit in Figure 12 illustrates the use
of Zener diodes to clamp the LTC4211s GATE overdrive
signal if lower voltage MOSFETs are used.
Figure 12. Optional Gate Clamp for Lower V
GS(MAX)
 MOSFETs
V
CC
V
OUT
*USER SELECTED VOLTAGE CLAMP
(A LOW BIAS CURRENT ZENER DIODE IS RECOMMENDED)
1N4688 (5V)
1N4692 (7V): LOGIC-LEVEL MOSFET
1N4695 (9V)
1N4702 (15V): STANDARD-LEVEL MOSFET
4211 F12
R
SENSE
GATE
D2*
D1*
Q1
R
G
200?/DIV>
The R
DS(ON)
 of the external pass transistor should be low
to make its drain-source voltage (V
DS
) a small percentage
of V
CC
. At a V
CC
 = 2.5V, V
DS
 + V
RSENSE
 = 0.1V yields 4%
error at the output voltage. This restricts the choice of
MOSFETs to very low R
DS(ON)
. At higher V
CC
 voltages, the
V
DS
 requirement can be relaxed in which case MOSFET
package dissipation (P
D
 and T
J
) may limit the value of
相關(guān)PDF資料
PDF描述
LTC4212IMS#TRPBF IC CTRLR HOTSWAP TIMEOUT 10MSOP
LTC4214-1IMS#TRPBF IC CTRLR HOTSWAP NEGVOLT 10MSOP
LTC4215IUFD#PBF IC CNTRLR HOT SWAP 24-QFN
LTC4216IDE#TRPBF IC CNTRLR HOT SWAP 12-DFN
LTC4221IGN#TRPBF IC CTRLR HOTSWAP DUAL 16SSOP
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
LTC4211IMS8#PBF 功能描述:IC CONTROLLER HOT SWAP 8-MSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 熱交換 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:119 系列:- 類型:熱交換控制器 應(yīng)用:通用型，PCI Express? 內(nèi)部開關(guān):無 電流限制:- 電源電壓:3.3V，12V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:80-TQFP 供應(yīng)商設(shè)備封裝:80-TQFP（12x12） 包裝:托盤 產(chǎn)品目錄頁面:1423 (CN2011-ZH PDF)
LTC4211IMS8#TR 功能描述:IC CONTROLLER HOT SWAP 8-MSOP RoHS:否 類別:集成電路 (IC) >> PMIC - 熱交換 系列:- 標(biāo)準(zhǔn)包裝:50 系列:- 類型:熱交換控制器 應(yīng)用:-48V 遠程電力系統(tǒng)，AdvancedTCA ? 系統(tǒng)，高可用性 內(nèi)部開關(guān):無 電流限制:可調(diào) 電源電壓:11.5 V ~ 14.5 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:10-TFSOP，10-MSOP（0.118"，3.00mm 寬） 供應(yīng)商設(shè)備封裝:10-MSOP 包裝:管件
LTC4211IMS8#TRPBF 功能描述:IC CONTROLLER HOT SWAP 8-MSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 熱交換 系列:- 標(biāo)準(zhǔn)包裝:50 系列:- 類型:熱交換控制器 應(yīng)用:-48V 遠程電力系統(tǒng)，AdvancedTCA ? 系統(tǒng)，高可用性 內(nèi)部開關(guān):無 電流限制:可調(diào) 電源電壓:11.5 V ~ 14.5 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:10-TFSOP，10-MSOP（0.118"，3.00mm 寬） 供應(yīng)商設(shè)備封裝:10-MSOP 包裝:管件
LTC4211IS8 功能描述:IC CTRLR HOTSWAP CURR CTRL 8SOIC RoHS:否 類別:集成電路 (IC) >> PMIC - 熱交換 系列:- 標(biāo)準(zhǔn)包裝:50 系列:- 類型:熱交換控制器 應(yīng)用:-48V 遠程電力系統(tǒng)，AdvancedTCA ? 系統(tǒng)，高可用性 內(nèi)部開關(guān):無 電流限制:可調(diào) 電源電壓:11.5 V ~ 14.5 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:10-TFSOP，10-MSOP（0.118"，3.00mm 寬） 供應(yīng)商設(shè)備封裝:10-MSOP 包裝:管件
LTC4211IS8#PBF 功能描述:IC CONTROLLER HOT SWAP 8-SOIC RoHS:是 類別:集成電路 (IC) >> PMIC - 熱交換 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:119 系列:- 類型:熱交換控制器 應(yīng)用:通用型，PCI Express? 內(nèi)部開關(guān):無 電流限制:- 電源電壓:3.3V，12V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:80-TQFP 供應(yīng)商設(shè)備封裝:80-TQFP（12x12） 包裝:托盤 產(chǎn)品目錄頁面:1423 (CN2011-ZH PDF)
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。

采購需求

(若只采購一條型號，填寫一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購。也可以進入我的后臺，查看報價

發(fā)布成功！您可以繼續(xù)發(fā)布采購。也可以進入我的后臺，查看報價

*型號 *數(shù)量 廠商 批號 封裝
添加更多采購

我的聯(lián)系方式

*
*
*