• Dimming Range from 5% to100%
• Integrated Dimming Transformer Driver Enables Isolation between the LED Driver and the Dimming Controller
• MOSFET Valley Turn-ON Reduces Switching Losses
• Integraed High Voltage Start-up Function Start-up Time<300ms
• Low Standby Power<500mW
• Reliable Short LED and Open LED Protections
• Power Factor >0.90
• Internal High Current MOSFET Driver: 0.19A Sourcing and 0.6A Sinking
•  Compact Package: SO8 

The SY5987 is a Boost PFC controller used to drive LEDs in the isolated dimming applications. Using a voltage generated by an external dimming controller, the LEDs can be dimmed between 5% and 100% (fully ON). The device uses a Constant On Time (COT) control to achieve a high power factor. It integrates a transformer driver to simplify the design and enable the use of an isolation barrier between a 0~10V dimming controller and the LED string.