OB2633 Datasheet | On-Bright

DESCRIPTION FEATURES OB2633 is a highly integrated Quasi- - Very wide range of supply voltage Resonant(QR) controller with adaptive multi-mode regulation, optimized for high performance, low EMI, low standby power consumption and wide output voltage range Quick Charger(QC) solutions, together with secondary -side controllers, such as OB200x and OB2603x supporting Qualm - Multi-Mode Operation 75KHz maximum clamping frequency in QR mode @ Full Load in high line voltage 55KHz minimum clamping frequency in CCM mode @ Heavy Load in low line voltage Quick Charge QC3.0 protocol. The controller is as Valley switching operation @ Green mode well patible with cost effective offline flyback Burst Mode @ Light Load & No Load converter applications covering a wide output - Power on soft start reducing MOSFET Vds range. stress At normal load condition, it operates in QR mode in high line input voltage. To minimize switching loss, the maximum switching frequency in QR to mode is internally limited to 75 KHz. When the loading goes low, it operates in PFM mode with l valley switching for high power conversion efficiency. When the load is very small, the IC tia operates in ‘Extended Burst Mode’ to minimize the standby power loss. Additionally, in the low line input voltage, the IC operates in fixed frequency n (55KHz) CCM mode at the heavy loading. As a result, high conversion efficiency can be achieved e in the whole loading range. fid OB2633 offers plete protection including cycle-by-cycle current limiting (OCP), over load protection (OLP), over temperature protection n (OTP), output short protection (SCP), output under voltage protection (UVP), output and VDD over o voltage protection. Excellent EMI performance is achieved with On-Bright proprietary frequency c shuffling technique. t The tone energy at below 22KHz is minimized to avoid audio noise during operation. h OB2633 is offered in SOT23-6 package. On-Brig TYPICAL APPLICATION - Extended burst mode control for...