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L6566BTR Integratedcircuits , Ic Electronic Components Multi mode controller for SMPS

Categories Integrated Circuit Chip
Brand Name: Anterwell
Model Number: L6566BTR
Certification: new & original
Place of Origin: original factory
MOQ: 20pcs
Price: Negotiate
Payment Terms: T/T, Western Union, Paypal
Supply Ability: 6900pcs
Delivery Time: 1 day
Packaging Details: Please contact me for details
Voltage range (referred to ground): -0.3 to 700 V
Voltage range: -0.3 to 2 V
Analog inputs and outputs: -0.3 to 7 V
Zero current detector max. current: ±5 mA
Storage temperature: -55 to 150 °C
Junction operating temperature: -40 to 150 °C
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    L6566BTR Integratedcircuits , Ic Electronic Components Multi mode controller for SMPS


    L6566BTR Integratedcircuits , Ic Electronic Components Multi mode controller for SMPS


    Features


    ■ Selectable multi-mode operation: fixed frequency or quasi-resonant

    ■ On-board 700 V high-voltage start-up

    ■ Advanced light load management

    ■ Low quiescent current (< 3 mA)

    ■ Adaptive UVLO

    ■ Line feedforward for constant power capability vs mains voltage


    ■ Pulse-by-pulse OCP, shutdown on overload (latched or autorestart)

    ■ Transformer saturation detection

    ■ Programmable frequency modulation for EMI reduction

    ■ Latched or autorestart OVP

    ■ Brownout protection

    ■ -600/+800 mA totem pole gate driver with active pull-down during UVLO

    ■ SO16N package


    Applications


    ■ Hi-end AC-DC adapter/charger

    ■ LCD TV/monitor, PDP

    ■ digital consumer, IT equipment

    ■ single-stage PFC


    Description

    The L6566B is an extremely versatile current-mode primary controller ICs, specifically designed for high-performance offline flyback converters. It is also suited for single-stage single-switch input-current-shaping converters (single-stage PFC) for applications supposed to comply with EN61000-3-2 or JEITA-MITI regulations.


    Both fixed-frequency (FF) and quasi-resonant (QR) operation are supported. The user can pick either of the two depending on application needs. The device features an externally programmable oscillator: it defines converter’s switching frequency in FF mode and the maximum allowed switching frequency in QR mode.


    When FF operation is selected, the ICs work like a standard current-mode controller with a maximum duty cycle limited at 70 % min. The oscillator frequency can be modulated to mitigate EMI emissions.


    QR operation, when selected, occurs at heavy load and is achieved through a transformer demagnetization sensing input that triggers MOSFET’s turn-on. Under some conditions, ZVS (zero-voltage switching) can be achieved. Converter’s power capability rise with the mains voltage is compensated by line voltage feedforward. At medium and light load, as the QR operating frequency equals the oscillator frequency, a function (valley skipping) is activated to prevent further frequency rise and keep the operation as close to ZVS as possible.


    With either FF or QR operation, at very light load the ICs enter a controlled burst-mode operation that, along with the built-in non-dissipative high-voltage start-up circuit and the low quiescent current, helps keep low the consumption from the mains and meet energy saving recommendations.


    An innovative adaptive UVLO helps minimize the issues related to the fluctuations of the self-supply voltage due to transformer’s parasites.


    The protection functions included in this device are: not-latched input undervoltage (brownout), output OVP (auto-restart or latch-mode selectable), a first-level OCP with delayed shutdown to protect the system during overload or short circuit conditions (autorestart or latch-mode selectable) and a second-level OCP that is invoked when the transformer saturates or the secondary diode fails short. A latched disable input allows easy implementation of OTP with an external NTC, while an internal thermal shutdown prevents IC overheating.


    Programmable soft-start, leading-edge blanking on the current sense input for greater noise immunity, slope compensation (in FF mode only), and a shutdown function for externally controlled burst-mode operation or remote ON/OFF control complete the equipment of this device.


    Absolute maximum ratings

    SymbolPinParameterValueUnit
    VHVS1Voltage range (referred to ground)-0.3 to 700V
    IHVS1Output currentSelf-limited
    VCC5IC supply voltage (Icc = 20 mA)Self-limited
    VFMOD6Voltage range-0.3 to 2V
    Vmax7, 8, 10, 14Analog inputs and outputs-0.3 to 7V
    Vmax9, 15, 16Maximum pin voltage (Ipin ≤ 1 mA)Self-limited
    IZCD11Zero current detector max. current±5mA
    VMODE/SC12Voltage range-0.3 to 3.3V
    VOSC13Voltage range-0.3 to 3.3V
    PTOTPower dissipation @TA = 50 °C0.75W
    TSTGStorage temperature-55 to 150°C
    TJJunction operating temperature range-40 to 150°C

    Typical system block diagram


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