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参数资料
| 型号： | LTC4252A-2CMS#TRPBF |
| 厂商： | LINEAR TECHNOLOGY CORP |
| 元件分类： | 电源管理 |
| 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 |
| 封装： | LEAD FREE, PLASTIC, MSOP-10 |
| 文件页数： | 16/36页 |
| 文件大小： | 394K |
| 代理商： | LTC4252A-2CMS#TRPBF |
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LTC4252-1/LTC4252-2
LTC4252A-1/LTC4252A-2
23
425212fb
APPLICATIO S I FOR ATIO
WU
U
a GATE start-up cycle begins. SS ramps up as dictated by
RSS CSS; GATE is held low by the analog current limit
amplifier until SS crosses 20 VOS. Upon releasing GATE,
58
A sources into the external MOSFET gate and compen-
sation 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 (230A
+ 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
5.8
A 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.
Figure 10. Power-Up Timing with a Short Pin (All Waveforms are Referenced to VEE)
5.8
A
58
A
5.8
A
5.8
A
58
A
GATE
START-UP
INITIAL TIMING
UV CLEARS VUVHI, CHECK OV < VOVHI, GATE < VGATEL, SENSE < VCB, SS < 20 VOS AND TIMER < VTMRL
12
3 4 56
7
8 9
TIMER CLEARS VTMRL, CHECK GATE < VGATEL, SENSE < VCB AND SS < 20 VOS
1011
4252-1/2 F10
GND – VEE OR
(–48RTN) – (–48V)
UV/OV
VIN
TIMER
GATE
SENSE
VOUT
SS
DRAIN
PWRGD
VLKO
VUVHI
VACL
VCB
230
A + 8 IDRN
20 VOS
VIN – VGATEH
VDRNL
VDRNCL
20 (VCB + VOS)
20 (VACL + VOS)
VGATEL
VTMRL
VTMRH
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LTC4252A-2IMS | 功能描述:IC CTRLR HOTSWAP NEG VOLT 10MSOP RoHS:否 类别:集成电路 (IC) >> PMIC - 热交换 系列:- 产品培训模块:Obsolescence Mitigation Program 标准包装:100 系列:- 类型:热插拔开关 应用:通用 内部开关:是 电流限制:可调 电源电压:9 V ~ 13.2 V 工作温度:-40°C ~ 150°C 安装类型:表面贴装 封装/外壳:10-WFDFN 裸露焊盘 供应商设备封装:10-TDFN-EP（3x3） 包装:管件 |
| LTC4252A-2IMS#PBF | 功能描述:IC CNTRLR HOTSWAP NEGVOLT 10MSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 热交换 系列:- 产品培训模块:Obsolescence Mitigation Program 标准包装:100 系列:- 类型:热插拔开关 应用:通用 内部开关:是 电流限制:可调 电源电压:9 V ~ 13.2 V 工作温度:-40°C ~ 150°C 安装类型:表面贴装 封装/外壳:10-WFDFN 裸露焊盘 供应商设备封装:10-TDFN-EP（3x3） 包装:管件 |
| LTC4252A-2IMS#TR | 功能描述:IC CTRLR HOTSWAP NEG VOLT 10MSOP RoHS:否 类别:集成电路 (IC) >> PMIC - 热交换 系列:- 产品培训模块:Obsolescence Mitigation Program 标准包装:100 系列:- 类型:热插拔开关 应用:通用 内部开关:是 电流限制:可调 电源电压:9 V ~ 13.2 V 工作温度:-40°C ~ 150°C 安装类型:表面贴装 封装/外壳:10-WFDFN 裸露焊盘 供应商设备封装:10-TDFN-EP（3x3） 包装:管件 |
| LTC4252A-2IMS#TRPBF | 功能描述:IC CNTRLR HOTSWAP NEGVOLT 10MSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 热交换 系列:- 产品培训模块:Obsolescence Mitigation Program 标准包装:100 系列:- 类型:热插拔开关 应用:通用 内部开关:是 电流限制:可调 电源电压:9 V ~ 13.2 V 工作温度:-40°C ~ 150°C 安装类型:表面贴装 封装/外壳:10-WFDFN 裸露焊盘 供应商设备封装:10-TDFN-EP（3x3） 包装:管件 |
| LTC4252A-2IMSPBF | 制造商:LINER 制造商全称:Linear Technology 功能描述:Negative Voltage Hot Swap Controllers |
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