• 2.0%~100.0% Dimming Range
• CV Mode for Bias Supply when PWM=0.0%
• Primary Side Control Eliminates the Opto-coupler
• Valley Turn-on of the Primary MOSFET to Achieve Low Switching Losses
• 0.3V Primary Current Sense Reference Voltage Leads to A Lower Sense Resistance thus A Lower Conduction Loss
• 200mA Sourcing Current and 650mA Sinking Current Drive Capability
• Low Start up Current: 34μA Typical
• Reliable Short LED and Open LED Protection
• Power Factor >0.90 with Single-stage Conversion.(Analog Dimming Only)
• RoHS Compliant and Halogen Free
• Compact Package: SO8

The SY22652N is a single stage Flyback and PFC controller targeting at LED Dimming applications, which can achieve up to 2% dimming level and high precision for full loading range. It is a primary side controller without applying any secondary feedback circuit for low cost, and drives the converter in the quasi-resonant mode to achieve high efficiency. It keeps the converter in constant on time operation to achieve high power factor.

SY22652N has CV mode for fast startup, especially in deep dimming. CV function is also can be used as the power supply of low energy MCU.