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    參數(shù)資料
    

    


    


    
型號：
LTC4252A-1CMS#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&deg;C to +70&deg;C

    

    
中文描述：
1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO10

    

    
封裝：
LEAD FREE, PLASTIC, MSOP-10

    

    
文件頁數(shù)：
22/36頁

    

    
文件大?。?/td>
394K

    

    
代理商：
LTC4252A-1CMS#TRPBF


    

    

    

	
    
    
    

    
    
	
    LTC4252-1/LTC4252-2
    LTC4252A-1/LTC4252A-2
    29
    425212fb
    current begins to decline below VACL(t). The current limit
    loop shuts off and GATE releases at time point 8. At time
    point 9, the SENSE voltage falls below VCB and TIMER
    deactivates.
    Large values of CSS can cause premature circuit breaker
    time out as VACL(t) may exceed the VCB potential during
    the circuit breaker delay. The load capacitor is unable to
    achieve full charge in one GATE start-up cycle. A more
    serious side effect of large CSS values is SOA duration may
    be exceeded during soft-start into a low impedance load.
    A soft-start voltage below VCB will not activate the circuit
    breaker TIMER.
    Power Limit Circuit Breaker
    Figure 19 shows the LTC4252A-1 in a power limit circuit
    breaking application. The SENSE pin is modulated by the
    board supply voltage, VSUPPLY. The zener voltage, VZ is set
    to be the same as the low supply operating voltage,
    VSUPPLY(MIN) = 43V. If the goal is to have the high supply
    operating voltage, VSUPPLY(MAX) = 71V giving the same
    power at VSUPPLY(MIN), then resistors R4 and R6 are
    selected using the ratio:
    APPLICATIO S I FOR ATIO
    WU
    U
    R
    V
    CB
    SUPPLY MAX
    6
    4
    =
    ()
    (16)
    If R6 is 27
    , R4 is 38.3k. The peak circuit breaker power
    limit is:
    POWER
    VV
    POWER
    MAX
    SUPPLY MIN
    SUPPLY MAX
    SUPPLY MIN
    SUPPLY MAX
    SUPPLY MIN
    =
    +
    ()
    =
    ()
    (
    )
    ()
    (
    )
    ()
    .
    2
    4
    1 064
    (17)
    when
    VSUPPLY = 0.5  (VSUPPLY(MIN) + VSUPPLY(MAX)) = 57V.
    The peak power at the fault current limit occurs at the
    supply overvoltage threshold. The fault current limited
    power is:
    POWER
    V
    R
    VV
    V
    R
    FAULT
    SUPPLY
    S
    ACL
    SUPPLY
    Z
    =
    ()
    –
    6
    4
    (18)
    Figure 18. Soft-Start Timing (All Waveforms are Referenced to VEE)
    (18a) Without External CSS
    (18b) With External CSS
    TIMER
    GATE
    SENSE
    SS
    DRAIN
    VTMRH
    VDRNCL
    VACL
    VCB
    VDRNL
    VGS(th)
    VIN – VGATEH
    VTMRL
    4252-1/2 F18
    PWRGD
    5.8
    A
    58
    A
    58
    A
    TIMER
    GATE
    SENSE
    SS
    DRAIN
    VTMRH
    VDRNCL
    VCB
    VACL
    VDRNL
    VGS(th)
    VIN – VGATEH
    VTMRL
    PWRGD
    5.8
    A
    58
    A
    58
    A
    12 34 567
    7a
    8 9
    10
    11
    END OF INTIAL TIMING CYCLE
    12 3 4 5 6
    7
    8 9
    10
    11
    END OF INTIAL TIMING CYCLE
    20  VOS
    20  (VCB + VOS)
    20  (VACL + VOS)
    20  VOS
    20  (VCB + VOS)
    20  (VACL + VOS)
    230
    A + 8  IDRN
    230
    A + 8  IDRN
    
    
    
    
    
    


    


    

    相關(guān)PDF資料
    		

    PDF描述
    		

    
    

    
LTC4252A-1IMS#PBF
Negative Voltage Hot Swap Controllers; Package: MSOP; No of Pins: 10; Temperature Range: -40&deg;C to +85&deg;C

    

    
LTC4252A-1IMS#TRPBF
Negative Voltage Hot Swap Controllers; Package: MSOP; No of Pins: 10; Temperature Range: -40&deg;C to +85&deg;C

    

    
LTC4252A-2CMS#PBF
Negative Voltage Hot Swap Controllers; Package: MSOP; No of Pins: 10; Temperature Range: 0&deg;C to +70&deg;C

    

    
LTC4252A-2CMS#TRPBF
Negative Voltage Hot Swap Controllers; Package: MSOP; No of Pins: 10; Temperature Range: 0&deg;C to +70&deg;C

    

    
LTC4252A-2IMS#PBF
Negative Voltage Hot Swap Controllers; Package: MSOP; No of Pins: 10; Temperature Range: -40&deg;C to +85&deg;C

    

    

    

    


    


    

    相關(guān)代理商/技術(shù)參數(shù)
    		

    參數(shù)描述
    		

    
    

    
LTC4252A-1IMS
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-1IMS#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:- 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-1IMS#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-1IMS#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

    

    
LTC4252A-1IMSPBF
 制造商:LINER 制造商全稱:Linear Technology 功能描述:Negative Voltage Hot Swap Controllers

    

    
    
    
    
	
    	
    
    
     
     
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