WS2299

WS2299 Product Description Current Mode PWM Controller Features � Burst Mode Control � 6.5uA ultra-low startup current � 2.3mA Low operating current � Built-in Leading-edge blanking � Built-in synchronous slope compensation circuit � Current Mode Operation � Soft-start 4ms � Soft-driver � Optional latch for OTP、OLP、OVP � External Programmable over temperature protection � Cycle by cycle over current protection (OCP) � Internal OCP compensation � Optional VDD OVP � under voltage lockout（UVLO） � Maximum Gate output voltage clamped at 12V � Frequency jittering � Constant Output Power Limit � Self-recovery over load protection (OLP) � Audio Noise Free Operation Applications Universal switch power supply equipment and offline AC/DC flyback power converter � Laptop Power Adapter � Set-Top Box Power Supplies � Open-frame SMPS � Battery Charger � Printer Power General Description WS2299 is a high performance current mode PWM controller, optimized for low power AC/DC adapter applications. For lower the standby power and higher RoHS compliant, the IC offers a Burst Mode control feature and ultra-low start-up current and operating current, that is, at the condition of no load or light load, WS2299 can reduce the switch frequency linearly which minimize the switching power loss; the ultra-low startup current and operating current make a reliable power for startup design, and also large resistor can be used in the startup circuit to improve switching efficiency. The internal synchronou...