參數(shù)資料
    

    


    


    
型號(hào)：
LTC4222CG#PBF

    

    
廠商：
LINEAR TECHNOLOGY CORP

    

    
元件分類：
電源管理

    

    
英文描述：
2-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO36

    

    
封裝：
5.30 MM, LEAD FREE, PLASTIC, SSOP-36

    

    
文件頁(yè)數(shù)：
6/32頁(yè)

    

    
文件大?。?/td>
280K

    

    
代理商：
LTC4222CG#PBF


    

    

    

	
    
    
    

    
    
	
    LTC4222
    14
    4222fa
    Figure 1. Typical Application
    A MOSFET is turned on by charging up the GATE with a
    12μA current source. When the GATE voltage reaches the
    MOSFET threshold voltage, the MOSFET begins to turn on
    and the SOURCE voltage then follows the GATE voltage
    as it increases.
    While the MOSFET is turning on, the inrush current in-
    creases linearly at a dI/dt rate selected by capacitor CSS.
    This is accomplished using the current limit amplier
    controlling the GATE pin voltage. Once the inrush current
    reaches the limit set by the FB pin, the dI/dt ramp stops and
    the inrush current follows the foldback prole as shown
    in Figure 2. When both channels turn on simultaneously,
    the foldback current limit is set by the lower of the two
    FB pins.
    A start-up timer is used to prevent damaging the MOSFET
    when starting up into a short-circuit. The TIMER capacitor
    integrates at 100μA during start-up and once the TIMER
    pin reaches threshold of 1.235V, the part checks to see if
    it is in current limit. If this is the case, the overcurrent fault
    bit, FAULT bit 2 in Table 6, is set and the part turns off. If
    the part is not in current limit, the 50mV circuit breaker is
    armed and the current limit is switched to 150mV. Alter-
    nately an internal 100ms start-up timer may be selected
    by tying the TIMER pin to INTVCC.
    As the SOURCE voltage rises, the FB pin voltage follows as
    set by R7 and R8. Once FB crosses its 1.235V threshold,
    and the start-up timer has expired, the corresponding GPIO
    pin, in the default power good conguration, ceases to
    pull low and indicates that power is now good. Alternately
    STATUS bit 3 can be read to check power-good status,
    where a zero indicates that power is good.
    If a series resistor and capacitor from GATE to GROUND
    (R6 and C1) are employed to provide a constant inrush
    current during start-up, which provides a constant dV/dt at
    UV1 VDD1
    LTC4222
    GATE1
    INTVCC
    ADR2
    ADR1
    NC
    ADR0
    CONFIG
    SOURCE1
    UV2 VDD2
    GATE2
    SOURCE2
    OV1
    OV2
    ALERT
    SCL
    SDA
    ON
    FB1
    ADIN1
    TIMER
    GPIO1
    EN1
    SS
    PLUG-IN
    CARD
    R5-1
    10Ω
    RG1
    15k
    CG1
    3.9nF
    CTIMER
    0.68μF
    CSS
    68nF
    RS1
    0.01Ω
    Q1
    FDD3706
    R71
    10.2k
    R81
    3.57k
    R41
    100k
    4222 TA01a
    CF1
    0.1μF
    R11
    140k
    R21
    4.53k
    R31
    13.7k
    Z1
    SA14A
    BACKPLANE
    GND
    ALERT
    SCL
    ON
    SDA
    VIN1
    12V
    ADIN2
    FB2
    GPIO2
    EN2
    C3
    0.1μF
    R5-2
    10Ω
    RG2
    15k
    CG2
    3.9nF
    RS2
    0.01Ω
    Q2
    FDD3706
    R72
    4.99k
    R82
    3.57k
    R42
    100k
    CF2
    0.1μF
    R12
    23.7k
    R22
    3.32k
    R32
    13.7k
    Z2
    SA14A
    VIN2
    3.3V
    SENSE1–
    SENSE2–
    APPLICATIONS INFORMATION
    
    
    
    
    
    


    


    

    相關(guān)PDF資料
    		

    PDF描述
    		

    
    

    
LTC4222CG#TRPBF
2-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO36

    

    
LTC4222IUH#TRPBF
2-CHANNEL POWER SUPPLY SUPPORT CKT, PQCC32

    

    
LTC4222IUH#PBF
2-CHANNEL POWER SUPPLY SUPPORT CKT, PQCC32

    

    
LTC4227CGN-2#TRPBF
POWER SUPPLY MANAGEMENT CKT, PDSO16

    

    
LTC4227IGN-1#PBF
POWER SUPPLY MANAGEMENT CKT, PDSO16

    

    

    

    


    


    

    相關(guān)代理商/技術(shù)參數(shù)
    		

    參數(shù)描述
    		

    
    

    
LTC4222CG-TRPBF
 制造商:LINER 制造商全稱:Linear Technology 功能描述:Dual Hot Swap Controller with I2C Compatible Monitoring

    

    
LTC4222CUH#PBF
功能描述:IC CTRLR DUAL HOT SWAP 32-QFN RoHS:是 類別:集成電路 (IC) >> PMIC - 熱交換 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS
	Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:119 系列:- 類型:熱交換控制器 應(yīng)用:通用型，PCI Express? 內(nèi)部開關(guān):無(wú) 電流限制:- 電源電壓:3.3V，12V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:80-TQFP 供應(yīng)商設(shè)備封裝:80-TQFP（12x12） 包裝:托盤 產(chǎn)品目錄頁(yè)面:1423 (CN2011-ZH PDF)

    

    
LTC4222CUH#TRPBF
功能描述:IC CTRLR DUAL HOT SWAP 32-QFN RoHS:是 類別:集成電路 (IC) >> PMIC - 熱交換 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS
	Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:119 系列:- 類型:熱交換控制器 應(yīng)用:通用型，PCI Express? 內(nèi)部開關(guān):無(wú) 電流限制:- 電源電壓:3.3V，12V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:80-TQFP 供應(yīng)商設(shè)備封裝:80-TQFP（12x12） 包裝:托盤 產(chǎn)品目錄頁(yè)面:1423 (CN2011-ZH PDF)

    

    
LTC4222CUH-PBF
 制造商:LINER 制造商全稱:Linear Technology 功能描述:Dual Hot Swap Controller with I2C Compatible Monitoring

    

    
LTC4222CUH-TRPBF
 制造商:LINER 制造商全稱:Linear Technology 功能描述:Dual Hot Swap Controller with I2C Compatible Monitoring

    

    
    
    
    
	
    	
    
    
     
     
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