WS3255 - WINSEMI

WS3255 High Precision Primary-Side Off-line PWM Power Switch

High Precision Primary-Side Off-line PWM Power Switch Features � 5uA ultra-low startup current � 2mA Low operating current � ±5% Constant Voltage Regulation at Universal AC input � Primary-side Sensing and Regulation Without TL431 and Opto-coupler � Programmable CV and CC Regulation � Built-in Primary winding inductance compensation � Programmable cable dr.

Features

� 5uA ultra-low startup current
� 2mA Low operating current
� ±5% Constant Voltage Regulation at Universal AC input
� Primary-side Sensing and Regulation Without TL431 and Opto-coupler
� Programmable CV and CC Regulation
� Built-in Primary winding inductance compensation
� Programmable cable drop compensation
� Built-in soft start
� Built-in Leading-edge blanking
� Cycle by cycle over current protection (OCP)
� VCC over voltage clamp & under voltage lockout( UVLO)
� Maximum Gate output voltage clamped at 12V
� Frequency jittering
� Ultra low standby power (<100mW) WS3255 operates in primary-s.