OB5269

OB5269 High Voltage Green Mode PWM Controller GENERAL DESCRIPTION FEATURES OB5269 is a highly integrated current mode PWM ■ High Voltage Startup control IC with high voltage start up, optimized for ■ Power on Soft Start Reducing MOSFET Vds high performance, low standby power Stress consumption and cost effective offline flyback converter applications. PWM switching frequency at normal operation is internally fixed and is trimmed to a tight range. At no load or light load condition, the IC operates in extended ‘burst mode’ to minimize switching loss. Very low standby power consumption and very high conversion efficiency is thus achieved. ■ ■ ■ ■ ■ Ktec Frequency shuffling for EMI Extended Burst Mode Control For Improved Efficiency and Minimum Standby Power Audio Noise Free Operation Fixed 65KHZ Switching Frequency Comprehensive Protection Coverage o VDD Under Voltage Lockout with Hysteresis (UVLO) High voltage startup is implemented in OB5269, which features with short startup time and low standby current. to OB5269 offers complete protection coverage with auto-recovery including Cycle-by-Cycle current l limiting (OCP), over load protection (OLP), and VDD under voltage lockout (UVLO). It also tia provides the protections with latched shut down including over temperature protection (OTP), and over voltage (fixed or adjustable) protection (OVP). Excellent EMI performance is achieved with On- n Bright proprietary frequency shuffling technique. The tone energy at below 2...