參數(shù)資料
型號(hào)： LTC4241IGN#PBF
廠商： Linear Technology
文件頁(yè)數(shù)： 12/16頁(yè)
文件大小： 279K
描述： IC CTRLR HOTSWAP 3.3V AUX 20SSOP
標(biāo)準(zhǔn)包裝： 55
類(lèi)型： 熱交換控制器
應(yīng)用： PCI，PCI-X
內(nèi)部開(kāi)關(guān)： 無(wú)
電源電壓： 3.3V，5V，±12V
工作溫度： -40°C ~ 85°C
安裝類(lèi)型： 表面貼裝
封裝/外殼： 20-SSOP（0.154"，3.90mm 寬）
供應(yīng)商設(shè)備封裝： 20-SSOP
包裝： 管件
LTC4241
12
sn4241 4241f
For C
TIMER
 = 0.1礔, the timer period will be ~50ms. The
TIMER pin is immediately pulled low when ON goes low.
Thermal Shutdown
The internal switches for the 12V and 12V supplies are
protected by an internal current limit and thermal shut-
down circuit. When the temperature of the chip reaches
150癈, only the switches controlling the PCI supplies will
be latched off and the FAULT pin will be pulled low.
Short-Circuit Protection for PCI Power Supplies
During a normal power-up sequence for the PCI power
supplies, if the TIMER is done ramping and any supply is
still in current limit, all of the pass transistors will be
immediately turned off, the TIMER and FAULT pin will be
pulled low as shown in Figure 4.
spikes  for example, from a fan turning on  from
causing false trips of the circuit breaker. The chip will stay
in the latched-off state until the ON pin is cycled low then
high, or the 12V
IN
 supply is cycled.
To prevent excessive power dissipation in the pass tran-
sistors and to prevent voltage spikes on the supplies
during short-circuit conditions, the current limit on each
PCI supply, except the 3.3V auxiliary supply, is designed
to be a function of the output voltage. As the output voltage
drops, the current limit decreases. Unlike a traditional
circuit breaker function where huge currents can flow
before the breaker trips, the current foldback feature
assures that the supply current will be kept at a safe level
and prevent voltage glitches when powering up into a
short.
APPLICATIO S I FOR ATIO
U
U
U
If a short-circuit occurs after the PCI supplies are powered
up, the shorted supplys current will drop immediately to
the limit value (Figure 5).
If the supply remains in current limit for more than 17祍,
all of the PCI supplies except the 3.3V auxiliary supply will
be latched off. The 17祍 delay prevents quick current
Figure 4. Power-Up into a Short on 3.3V Output
Figure 5. Short-Circuit on 5V Followed by Circuit Breaker Reset
The current limit and the foldback current level for the 5V
and 3.3V outputs are both a function of the external sense
resistor (R1 for 5V
OUT
 and R2 for 3V
OUT
, see Figure 1). As
shown in Figure 1, a sense resistor is connected between
5V
IN
 and 5V
SENSE
 for the 5V supply. For the 3V supply, a
sense resistor is connected between 3V
IN
 and 3V
SENSE
.
ON
10V/DIV
TIMER
10V/DIV
GATE
10V/DIV
PWRGD
10V/DIV
5V
OUT
5V/DIV
3V
OUT
5V/DIV
12V
OUT
5V/DIV
V
EEOUT
5V/DIV
FAULT
10V/DIV
20ms/DIV
4241 F04
ON
10V/DIV
TIMER
10V/DIV
GATE
10V/DIV
PWRGD
10V/DIV
5V
OUT
5V/DIV
3V
OUT
5V/DIV
12V
OUT
5V/DIV
V
EEOUT
5V/DIV
FAULT
10V/DIV
20ms/DIV
4241 F05
相關(guān)PDF資料
PDF描述
LTC4242CUHF#TRPBF IC CNTRLR HOT SWAP 38-QFN
LTC4244CGN-1#TRPBF IC CTRLR HOTSWAP PCI 20-SSOP
LTC4245CG#TRPBF IC CNTRLR HOT SWAP 36-SSOP
LTC4251-2CS6#TRPBF IC CTRLR HOTSWAP NEGVOLT SOT23-6
LTC4252A-1IMS#TRPBF IC CNTRLR HOTSWAP NEGVOLT 10MSOP
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
LTC4242 制造商:LINER 制造商全稱(chēng):Linear Technology 功能描述:Dual Slot Hot Swap Controller for PCI Express
LTC4242CG 制造商:LINER 制造商全稱(chēng):Linear Technology 功能描述:Dual Slot Hot Swap Controller for PCI Express
LTC4242CG#PBF 功能描述:IC CNTRLR HOT SWAP 36-SSOP RoHS:是 類(lèi)別:集成電路 (IC) >> PMIC - 熱交換 系列:- 產(chǎn)品培訓(xùn)模塊:Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:100 系列:- 類(lèi)型:熱插拔開(kāi)關(guān) 應(yīng)用:通用 內(nèi)部開(kāi)關(guān):是 電流限制:可調(diào) 電源電壓:9 V ~ 13.2 V 工作溫度:-40°C ~ 150°C 安裝類(lèi)型:表面貼裝 封裝/外殼:10-WFDFN 裸露焊盤(pán) 供應(yīng)商設(shè)備封裝:10-TDFN-EP（3x3） 包裝:管件
LTC4242CG#TRPBF 功能描述:IC CNTRLR HOT SWAP 36-SSOP RoHS:是 類(lèi)別:集成電路 (IC) >> PMIC - 熱交換 系列:- 產(chǎn)品培訓(xùn)模塊:Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:100 系列:- 類(lèi)型:熱插拔開(kāi)關(guān) 應(yīng)用:通用 內(nèi)部開(kāi)關(guān):是 電流限制:可調(diào) 電源電壓:9 V ~ 13.2 V 工作溫度:-40°C ~ 150°C 安裝類(lèi)型:表面貼裝 封裝/外殼:10-WFDFN 裸露焊盤(pán) 供應(yīng)商設(shè)備封裝:10-TDFN-EP（3x3） 包裝:管件
LTC4242CUHF 制造商:LINER 制造商全稱(chēng):Linear Technology 功能描述:Dual Slot Hot Swap Controller for PCI Express
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。

采購(gòu)需求

(若只采購(gòu)一條型號(hào)，填寫(xiě)一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

*型號(hào) *數(shù)量 廠商 批號(hào) 封裝
添加更多采購(gòu)

我的聯(lián)系方式

*
*
*