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參數(shù)資料
| 型號： | LTC4252-2CMS#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: 10; Temperature Range: 0°C to +70°C |
| 中文描述： | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO10 |
| 封裝： | LEAD FREE, PLASTIC, MSOP-10 |
| 文件頁數(shù)： | 15/36頁 |
| 文件大小： | 394K |
| 代理商： | LTC4252-2CMS#TRPBF |
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LTC4252-1/LTC4252-2
LTC4252A-1/LTC4252A-2
22
425212fb
APPLICATIO S I FOR ATIO
WU
U
At time 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, the fault TIMER cycle
ends, followed by a 5.8
A discharge cycle (cool off). The
duration between time points 7 and 9 must be shorter than
one circuit breaker delay to avoid a fault time out during
GATE ramp-up. When GATE ramps past the VGATEH thresh-
old at time point 10, PWRGD pulls low. At time point 11,
GATE reaches its maximum voltage as determined by VIN.
Live Insertion with Short Pin Control of UV/OV
In the example shown in Figure 10, power is delivered
through long connector pins whereas the UV/OV divider
makes contact through a short pin. This ensures the power
connections are firmly established before the LTC4252 is
activated. At time point 1, the power pins make contact and
VIN ramps through VLKO. At time point 2, the UV/OV divider
makes contact and its voltage exceeds VUVHI. In addition,
the internal logic checks for OV < VOVHI, GATE < VGATEL,
SENSE < VCB, SS < 20 VOS and TIMER < VTMRL. If all
conditions are met, an initial timing cycle starts and the
TIMER capacitor is charged by a 5.8
A current source
pull-up. At time point 3, TIMER reaches the VTMRH thresh-
old and the initial timing cycle terminates. The TIMER
capacitor is quickly discharged. At time point 4, the VTMRL
threshold is reached and the conditions of GATE < VGATEL,
SENSE < VCB and SS < 20 VOS must be satisfied before
Figure 9. System Power-Up Timing (All Waveforms are Referenced to VEE)
GND – VEE OR
(–48RTN) – (–48V)
UV/OV
VIN
TIMER
GATE
VLKO
SENSE
VIN CLEARS VLKO, CHECK UV > VUVHI, OV < VOVLO, GATE < VGATEL, SENSE < VCB, SS < 20 VOS AND TIMER < VTMRL
VOUT
12
3 4 56
7
8
VACL
VCB
9
TIMER CLEARS VTMRL, CHECK GATE < VGATEL, SENSE < VCB AND SS < 20 VOS
SS
DRAIN
PWRGD
230
A + 8 IDRN
5.8
A
20 VOS
58
A
10 11
VIN – VGATEH
VDRNL
VDRNCL
20 (VCB + VOS)
20 (VACL + VOS)
VGATEL
VTMRL
VTMRH
5.8
A
5.8
A
58
A
4252-1/2 F09
GATE
START-UP
INITIAL TIMING
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| LTC4252-2IMS#PBF | Negative Voltage Hot Swap Controllers; Package: MSOP; No of Pins: 10; Temperature Range: -40°C to +85°C |
| LTC4252-2IMS#TRPBF | Negative Voltage Hot Swap Controllers; Package: MSOP; No of Pins: 10; Temperature Range: -40°C to +85°C |
| LTC4252A-1CMS#PBF | Negative Voltage Hot Swap Controllers; Package: MSOP; No of Pins: 10; Temperature Range: 0°C to +70°C |
| LTC4252A-1CMS#TRPBF | Negative Voltage Hot Swap Controllers; Package: MSOP; No of Pins: 10; Temperature Range: 0°C to +70°C |
| LTC4252A-1IMS#PBF | Negative Voltage Hot Swap Controllers; Package: MSOP; No of Pins: 10; Temperature Range: -40°C to +85°C |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| 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 |
| LTC4252-2IMS#TR | 功能描述:IC CNTRLR HOTSWAP NEGVOLT 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 |
| LTC4252-2IMS#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 |
| LTC4252-2IMS8 | 功能描述:IC CNTRLR HOTSWAP NEGVOLT 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(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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