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參數(shù)資料
| 型號： | LTC4252-2CMS8#TRPBF |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | 電源管理 |
| 英文描述： | Negative Voltage Hot Swap Controllers; Package: MSOP; No of Pins: 8; Temperature Range: 0°C to +70°C |
| 中文描述： | 2-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO8 |
| 封裝： | LEAD FREE, PLASTIC, MSOP-8 |
| 文件頁數(shù)： | 16/36頁 |
| 文件大小： | 336K |
| 代理商： | LTC4252-2CMS8#TRPBF |
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LTC4252-1/LTC4252-2
LTC4252A-1/LTC4252A-2
23
425212fc
APPLICATIONS INFORMATION
satisfied before a GATE start-up cycle begins. SS ramps up
as dictated by RSSCSS; GATE is held low by the analog
current limit amplifier until SS crosses 20 VOS. Upon
releasing GATE, 58μA sources into the external MOSFET
gate and compensation network. When the GATE voltage
reaches the MOSFET’s threshold, current begins flowing
into the load capacitor at time point 5. At time point 6,
load current reaches the SS control level and the analog
current limit loop activates. Between time points 6 and 8,
the GATE voltage is servoed, the SENSE voltage is regulated
at VACL(t) and soft-start limits the slew rate of the load
current. If the SENSE voltage (VSENSE – VEE) reaches the
VCB threshold at time point 7, the circuit breaker TIMER
activates. The TIMER capacitor, CT, is charged by a (230μA
+ 8 IDRN) current pull-up. As the load capacitor nears full
charge, load current begins to decline. At point 8, the load
current falls and the SENSE voltage drops below VACL(t).
The analog current limit loop shuts off and the GATE pin
ramps further. At time point 9, the SENSE voltage drops
below VCB and the fault TIMER cycle ends, followed by a
5.8μA discharge cycle (cool off). When GATE ramps past
VGATEH threshold at time point 10, PWRGD pulls low. At
time point 11, GATE reaches its maximum voltage as
determined by VIN.
5.8μA
58μA
5.8μA
58μA
GATE
START-UP
INITIAL TIMING
UV CLEARS VUVHI, CHECK OV < VOVHI, GATE < VGATEL, SENSE < VCB
OS AND TIMER < VTMRL
12
3 4 56
7
8 9
TIMER CLEARS VTMRL, CHECK GATE < VGATEL, SENSE < VCB
OS
1011
425212 F10
GND – VEE OR
(–48RTN) – (–48V)
UV/OV
VIN
TIMER
GATE
SENSE
VOUT
SS
DRAIN
PWRGD
VLKO
VUVHI
VACL
VCB
DRN
OS
VIN – VGATEH
VDRNL
VDRNCL
CB + VOS)
ACL + VOS)
VGATEL
VTMRL
VTMRH
Figure 10. Power-Up Timing with a Short Pin (All Waveforms Are Referenced to VEE)
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LTC4252-2CMSPBF | 制造商:LINER 制造商全稱:Linear Technology 功能描述:Negative Voltage Hot Swap Controllers |
| LTC4252-2CMSTR | 制造商:LINER 制造商全稱:Linear Technology 功能描述:Negative Voltage Hot Swap Controllers |
| LTC4252-2CMSTRPBF | 制造商:LINER 制造商全稱:Linear Technology 功能描述:Negative Voltage Hot Swap Controllers |
| LTC4252-2IMS | 功能描述:IC CNTRLR HOTSWAP NEGVOLT 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(yuǎn)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 |
| LTC4252-2IMS#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(yuǎn)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 |
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