- 您現(xiàn)在的位置：買賣IC網(wǎng) > Datasheet目錄42 > LTC4252A-1IMS#TRPBF (Linear Technology)IC CNTRLR HOTSWAP NEGVOLT 10MSOP Datasheet資料下載
參數(shù)資料
| 型號： | LTC4252A-1IMS#TRPBF |
| 廠商： | Linear Technology |
| 文件頁數(shù)： | 28/36頁 |
| 文件大?。?/td> | 328K |
| 描述： | IC CNTRLR HOTSWAP NEGVOLT 10MSOP |
| 標(biāo)準(zhǔn)包裝： | 2,500 |
| 類型： | 熱交換控制器 |
| 應(yīng)用： | 通用 |
| 內(nèi)部開關(guān)： | 無 |
| 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： | 帶卷 (TR) |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁當(dāng)前第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁第36頁
LTC4252-1/LTC4252-2
LTC4252A-1/LTC4252A-2
28
425212fe
For more information www.linear.com/LTC4252-1
applicaTions inForMaTion
Analog Current Limit and Fast Current Limit
In Figure 17a, when SENSE exceeds V
ACL
, GATE is
regulated by the analog current limit amplifier loop. When
SENSE drops below V
ACL
, GATE is allowed to pull up. In
Figure 17b, when a severe fault occurs, SENSE exceeds
V
FCL
and GATE immediately pulls down until the analog
current amplifier establishes control. If the severe fault
causes V
OUT
to exceed V
DRNCL
, the DRAIN pin is clamped
at V
DRNCL
. I
DRN
flows into the DRAIN pin and is multiplied
by 8. This extra current is added to the TIMER pull-up
current of 230礎(chǔ). This accelerated TIMER current of
[230礎(chǔ)+8 " I
DRN
] produces a shorter circuit breaker fault
delay. Careful selection of C
T
, R
D
and MOSFET can help
prevent SOA damage in a low impedance fault condition.
Soft-Start
If the SS pin is not connected, this pin defaults to a linear
voltage ramp, from 0V to 2.2V in about 180祍 (or 0V to
1.4V in 230祍 for the LTC4252A) at GATE start-up, as
shown in Figure 18a. If a soft-start capacitor, C
SS
, is con-
nected to this SS pin, the soft-start response is modified
from a linear ramp to an RC response (Equation?), as
shown in Figure 18b. This feature allows load current to
slowly ramp-up at GATE start-up. Soft-start is initiated at
time point 3 by a TIMER transition from V
TMRH
to V
TMRL
(time points 1 to 2) or by the OV pin falling below the
V
OVLO
threshold after an OV condition. When the SS pin
is below 0.2V , the analog current limit amplifier holds
GATE low. Above 0.2V , GATE is released and 58礎(chǔ) ramps
up the compensation network and GATE capacitance at
time point 4. Meanwhile, the SS pin voltage continues to
ramp up. When GATE reaches the MOSFETs threshold,
the MOSFET begins to conduct. Due to the MOSFETs high
g
m
, the MOSFET current quickly reaches the soft-start
control value of V
ACL
(t) (Equation 7). At time point 6, the
GATE voltage is controlled by the current limit amplifier.
The soft-start control voltage reaches the circuit breaker
voltage, V
CB
, at time point 7 and the circuit breaker TIMER
activates. As the load capacitor nears full charge, load
TIMER
GATE
SENSE
V
OUT
V
ACL
V
CB
SS
DRAIN
V
TMRH
230礎(chǔ) + 8 " I
DRN
425212 F17
PWRGD
5.8礎(chǔ)
5.8礎(chǔ)
TIMER
GATE
SENSE
V
OUT
V
ACL
V
CB
V
FCL
SS
DRAIN
V
TMRH
V
DRNCL
230礎(chǔ) + 8 " I
DRN
PWRGD
1
2
1
4
3
2
CB TIMES OUT
Figure 17. Current Limit Behavior (All Waveforms Are Referenced to V
EE
)
(17a) Analog Current Limit Fault
(17b) Fast Current Limit Fault
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| LTC4253ACGN#TRPBF | IC HOT SWAP CONTRLR -48V 16-SSOP |
| LTC4257CS8 | IC CTRLR INTFACE PWR/ETHER 8SOIC |
| LTC4260IUH#PBF | IC HOT SWAP CNTRL I2C 32-QFN |
| LTC4261IGN-2#PBF | IC CTRLR HOTSWAP W/ADC 28-SSOP |
| LTC4263IS#TRPBF | IC IEEE 803.2AF CNTRLR 14-SOIC |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LTC4252A-2 | 制造商:LINER 制造商全稱:Linear Technology 功能描述:–48V Hot Swap Controllers |
| LTC4252A-2CMS | 功能描述:IC CTRLR HOTSWAP NEG VOLT 10MSOP 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 |
| LTC4252A-2CMS#PBF | 功能描述:IC CNTRLR HOTSWAP NEGVOLT 10MSOP 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 |
| LTC4252A-2CMS#TR | 功能描述:IC CTRLR HOTSWAP NEG VOLT 10MSOP RoHS:否 類別: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:- 類型:熱插拔開關(guān) 應(yīng)用:通用 內(nèi)部開關(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 安裝類型:表面貼裝 封裝/外殼:10-WFDFN 裸露焊盤 供應(yīng)商設(shè)備封裝:10-TDFN-EP（3x3） 包裝:管件 |
| LTC4252A-2CMS#TRPBF | 功能描述:IC CNTRLR HOTSWAP NEGVOLT 10MSOP RoHS:是 類別: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:- 類型:熱插拔開關(guān) 應(yīng)用:通用 內(nèi)部開關(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 安裝類型:表面貼裝 封裝/外殼:10-WFDFN 裸露焊盤 供應(yīng)商設(shè)備封裝:10-TDFN-EP（3x3） 包裝:管件 |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。