WS2393BN Datasheet | Winsemi

Description Switching Mode Power Supply PWM Controller WS2393BN Features - Low startup current (<5u A) - Low operation current (2.0m A) - 0.5m A operation current at no-load - Standby power <75mw - Multi-Mode Operation(PFM,PWM,QR) - Current mode operation - Advanced frequency jittering control - Programmable Bulk Capacitor Description In order to enhance the efficiency performance, the WS2393BN integrates the multi-mode PWM controller, which consists of Quasi-Resonant (QR) PWM control for light load condition and Continue Conduction Mode (CCM) for heavy load condition. For lower standby power consumption and higher energy saving requirement, the IC has the Burst Mode function and very low startup current and operating current. At the condition of no load or light load, the IC operates in extended ‘burst mode’ to minimize switching loss by lower the switching Brown-in/Brown-out Protection - Programmable external OTP and OVP - Cycle by cycle Over Current Protection (OCP) - CS PIN open protection - Internal OTP (Over Temperature frequency. The patented technologies of energy-saving at no-load contribute to minimize the power consumption (<75mw) and meet the efficiency standard of Do E or Er P VI. The WS2393BN applies advanced frequency jittering control to improve EMI performance at half load and light-load. Besides, it covers wide supply voltage(8-32V), which greatly facilitate the transformer design and the patibility of the Protection) - Soft-start function - VDD over voltage protection and clamp - VDD Under voltage lockout with hysteresis (UVLO） - Wide operation voltage (8-32V) - Driver Output clamped (12V) - Soft-driver function for reducing EMI - Constant output power limited - Over load protection(OLP) system. The internal synchronous slope pensation circuit improves system large signal stability and reduces the possibility of the sub-harmonic oscillation at high PWM duty cycle output. Leading-edge blanking on current sense input removes the signal glitch due...