OB5269 Datasheet | On-Bright

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 prehensive 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 plete 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 22KHZ is minimized to e avoid audio noise during operation. fid OB5269 is offered in SOP8 package. o Cycle-by-cycle over current protection (OCP) o Overload Protection (OLP) with autorecovery o Over Temperature Protection (OTP) with latch shut down o VDD Over voltage Protection(OVP) with latch shut down o Adjustable OVP through external Zener APPLICATIONS Offline AC/DC flyback converter for - Battery Charger - Power Adaptor - Open-frame SMPS On-Bright Con TYPICAL APPLICATION ©On-Bright Electronics Confidential -1- Preliminary Datasheet OB_DOC_DS_52690...