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UCC2897A Electronic IC Chips microchips and integrated circuits

    Buy cheap UCC2897A Electronic IC Chips microchips and integrated circuits from wholesalers
     
    Buy cheap UCC2897A Electronic IC Chips microchips and integrated circuits from wholesalers
    • Buy cheap UCC2897A Electronic IC Chips microchips and integrated circuits from wholesalers

    UCC2897A Electronic IC Chips microchips and integrated circuits

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    Brand Name : Anterwell
    Model Number : UCC2897A
    Certification : new & original
    Price : Negotiate
    Payment Terms : T/T, Western Union, Paypal
    Supply Ability : 7700pcs
    Delivery Time : 1 day
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    UCC2897A Electronic IC Chips microchips and integrated circuits


    Stock Offer (Hot Sell)

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    UCC2897A

    ADVANCED CURRENT-MODE ACTIVE CLAMP PWM CONTROLLER


    FEATURES

    • Low Output Jitter
    • “Soft Stop” shut down of MAIN and AUX
    • 110-V Input Startup Function
    • Ideal for Active Clamp/Reset Forward, Flyback and Synchronous Rectifier Uses

    • Provides Complementary Auxiliary Driver with Programmable Deadtime (Turn-On Delay) between AUX and MAIN Switches
    • Peak Current-Mode Control with 0.5-V Cycle-by-Cycle Current Limiting
    • Hiccup Mode 0.75-V Current Limit
    • TrueDriveTM 2-A Sink, 2-A Source Outputs

    • Trimmed Internal Bandgap Reference for Accurate Line UV and Line OV Threshold
    • Programmable Slope Compensation
    • High-Performance 1.0-MHz Synchronizable Oscillator with Internal Timing Capacitor
    • Precise Programmable Maximum Duty Cycle
    • PB-Free Lead Finish Package

    APPLICATIONS

    • High-Efficiency DC/DC Power Supplies
    • Server Power, 48-V Telecom, Datacom, and 42-V Automotive Applications

    DESCRIPTION

    The UCC2897A PWM controller simplifies implementation of the various active clamp/reset and synchronous rectifier switching power topologies.


    The UCC2897A is a peak current-mode, fixedfrequency, high-performance pulse width modulator. It includes the logic and the drive capability for the P-channel auxiliary switch along with a simple method of programming the critical delays for proper active clamp operation.


    Features include an internal programmable slope compensation circuit, precise DMAX limit, and a synchronizable oscillator with an internal timing capacitor. An accurate line monitoring function also programs the converter’s ON and OFF transitions with regard to the bulk input voltage, VIN.


    The UCC2897A adds a second level hiccup mode current sense threshold, bi-directional synchronization and input overvoltage protection functionalities. The UCC2897A is offered in 20-pin TSSOP (PW) and 20-pin QFN (RGP) package.


    ABSOLUTE MAXIMUM RATINGS

    over operating free-air temperature range unless otherwise noted(1)

    Line input voltage, VIN120V
    Supply voltage, VDD(IDD < 10 mA)116.5V
    Analog inputsFB, CS, SYNC, LINEOV, LINEUV−0.3 to (VREF + 0.3)V
    Output source current (peak), IO_SOURCEOUT, AUX2.5A
    Output sink current (peak), IO_SINK-2.5
    Operating junction temperature range, TJ−55 to 150°C
    Storage temperature, Tstg−65 to 150°C
    ESD ratingHuman body model, (HBM)2000V
    Charged device model (CDM)500
    Lead temperature, Tsol, 1,6 mm (1/16 inch) from case for 10 seconds300°C

    (1) Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability. All voltages are with respect to GND. Currents are positive into and negative out of, the specified terminal.


    TYPICAL APPLICATION DIAGRAM


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