DESCRIPTION
   The PT6917 is a primary side regulation single stage Flyback and PFC controller for offline LED dimming applications. It achieves high power factor and accurate constant LED current with single power stage for isolated lighting applications.

FEATURES
• High PF>0.9 with single stage conversion
• Compatible with analog/PWM dimming modes
• Real-current control technique achieves accurate
   constant LED current
• Primary Side Regulation eliminates secondary
   feedback circuit
• Quasi-Resonant switching mode to achieve low
   switching losses
• 0.3V primary current sense reference voltage
   leads to a lower conduction loss
• ± 5% output current accuracy
• Excellent line regulation and load regulation
• Reliable short LED and open LED protection
• System auto-restart function
• Low start-up current: 20μA typical
• VCC over voltage protection (OVP)
• VCC under voltage lockout (UVLO)
• Cycle by cycle primary side current limiting
• Over temperature protection (OTP)
• SOP-8 package

APPLICATIONS
• LED tube lamp
• LED PAR lamp
• LED ceiling lamp
• Other LED lighting