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KP36673

KP36673 High-integration, offline current mode PWM control power switch KP36673 is a high-performance secondary-side controlled PWM power switch for offline flyback power supply design. The IC also integrates a high-voltage MOSFET to improve the system's surge tolerance. KP36673 has a built-in high-precision 132kHz switching frequency oscillator with a spread-spectrum function to optimize EMI performance. The chip operates in green energy-saving mode and hiccup mode, and has a high-voltage self-start function eliminating the need for a start-up resistor; the chip's internal peak current detection threshold automatically adjusts according to the actual load, effectively reducing standby power consumption under no-load conditions, ensuring standby power consumption of less than 50mW (auxiliary winding power supply). KP36673 integrates complete protection functions, including: overload protection (OLP), input undervoltage protection (BOP), VDD overvoltage protection (VDD OVP), VDD undervoltage protection (VDD UVLO), cycle-by-cycle current limit (OCP), abnormal overcurrent protection (AOCP), overtemperature protection (OTP), soft start, leading edge blanking (LEB), and VDD clamping.


  • Product Description
    • Commodity name: KP36673
    • 封装: DIP-7
    • 品牌: Biyi Microelectronics

    KP36673 High-integration, offline current mode PWM control power switch KP36673 is a high-performance secondary-side controlled PWM power switch for offline flyback power supply design. The IC also integrates a high-voltage MOSFET to improve the system's surge tolerance. KP36673 has a built-in high-precision 132kHz switching frequency oscillator with a spread-spectrum function to optimize EMI performance. The chip operates in green energy-saving mode and hiccup mode, and has a high-voltage self-start function eliminating the need for a start-up resistor; the chip's internal peak current detection threshold automatically adjusts according to the actual load, effectively reducing standby power consumption under no-load conditions, ensuring standby power consumption of less than 50mW (auxiliary winding power supply). KP36673 integrates complete protection functions, including: overload protection (OLP), input undervoltage protection (BOP), VDD overvoltage protection (VDD OVP), VDD undervoltage protection (VDD UVLO), cycle-by-cycle current limit (OCP), abnormal overcurrent protection (AOCP), overtemperature protection (OTP), soft start, leading edge blanking (LEB), and VDD clamping.

     

    Main Features

    • Integrated 700V high-voltage MOSFET

    • Integrated sampling resistor, high-voltage startup circuit

    • Fixed 132kHz switching frequency

    • Compatible with flyback isolated and non-isolated applications

    • ±1% constant voltage accuracy

    • Standby power consumption <50mW (with auxiliary winding)

    • Standby power consumption <150mW (without auxiliary winding)

    • Green energy-saving mode and hiccup mode operation

    • Noiseless operation throughout the entire working range

    • Integrated frequency dithering function to optimize EMI

    • Integrated self-recovery protection functions:

    • Overload protection (OLP)

    • Input undervoltage protection (BOP)

    • VDD overvoltage protection (VDD OVP) and clamping (Clamp)

    • VDD undervoltage protection (VDD UVLO)

    • Cycle-by-cycle current limiting (OCP)

    • Abnormal overcurrent protection (AOCP)

    • Overtemperature protection (OTP)

    • Package type DIP-7

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