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    OB2631

    GENERAL DESCRIPTION

    OB2631x combines a dedicated current mode PWM controller with a high voltage power MOSFET. It is optimized for high performance, low standby power, and cost effective off-line flyback converter applications.

    OB2631x offers comprehensive protection coverage with auto-recovery including Cycle-by-Cycle current limiting (OCP), over load protection (OLP), VDD under voltage lockout (UVLO) and internalover temperature protection (OTP).Excellent EMI performance is achieved with On-Bright proprietary frequency shuffling technique.

    The tone energy at below 23KHz is minimized in the design and audio noise is eliminated during operation.

    OB2631x is offered in SOP8 package.


    FEATURES

    ■Very wide range of VDD supply voltage

    ■Standby power < 75mW at universal AC input

    ■Power on soft start reducing MOSFET Vds stress

    ■Frequency shuffling for EMI

    ■Extended burst mode control for improved efficiency and minimum standby power design

    ■Fixed 65KHZ (typical) switching frequency

    ■Internal synchronized slope compensation

    ■Low VDD startup current and low operating current

    ■Leading edge blanking on current sense input

    ■Comprehensive protection coverage

    oVDD Under Voltage Lockout with hysteresis (UVLO)

    oVDD Over Voltage Protection (VDD OVP)

    oCycle-by-cycle over current thresholdsetting for constant output power limiting over universal input voltage range

    oOver Load Protection (OLP) with auto-recovery

    oOutput diode short protection with auto-recovery

    APPLICATIONS

    Offline AC/DC flyback converter for

    ■PD adapter

    ■Wide output range adapter


    TYPICAL APPLICATION

    Baidu
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