OB233F

OB233F High Performance Current Mode PWM Power Switch GENERAL DESCRIPTION OB233F combines a dedicated current mode PWM controller with a high voltage power MOSFET. It is optimized for high performance, low standby power, and cost effective off-line flyback converter applications. OB233F offers complete protection coverage with automatic recovery feature including Cycle-byCycle current limiting (OCP), over load protection (OLP), over temperature protection (OTP), over voltage protection and VDD under voltage lockout (UVLO). Excellent EMI performance is achieved with On-Bright proprietary frequency shuffling technique together with soft switching control at the totem pole gate drive output. The tone energy at below 20KHZ is minimized in the design and audio noise is eliminated during operation. OB233F is offered in DIP7 package. APPLICATIONS Offline AC/DC flyback converter for ■ AC/DC adapter ■ PDA power supplies ■ Digital cameras and camcorder adapter ■ VCR, SVR, STB, DVD&DVCD ...