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SD7800
SINGLE STAGE PRIMARY SIDE REGULATION PFC CONTROLLER FOR LED DRIVER

    The SD7800 is a single stage primary side regulation (PSR) power factor correction (PFC) controller, specially designed for flyback LED driver.

    The SD7800 provides accurate constant current control and operates in boundary conduction mode (BCM) with high efficiency. The Device adopts primary side regulation eliminating the opto-couple, secondary feedback control and loop compensation for reducing design and cost.

    The SD7800 adopts constant on time operation to achieve high power factor. Due to patented close-loop control technology pin COMP and peripheral compensation network are unnecessary, and output current will not be affected by moisture or leakage current; thanks to patented THD technology, low THD is obtained without optimized THD network in most applications.

    The SD7800 provides completed protections such as input over voltage protection, input under voltage protection, LED short protection, LED open protection, cycle-by-cycle current limiting, and four section high temperature drop current and over temperature protection setting, etc.


Main feature

  • PSR flyback topology

  • Boundary Conduction Mode

  • Constant on time control

  • Patented close-loop technology to prevent moisture and leakage, peripheral compensation network is unnecessary

  • Patented THD optimized technology without need of peripheral optimized network

  • VCC over voltage protection and VCC under voltage lockout

  • Input over voltage protection and input under voltage protection

  • Cycle-by-cycle current limiting and peak current compensation

  • LED short protection and LED open protection 

  • Four section high temperature drop current setting

  • Four section over temperature protection setting


Ordering Information
Product Name Package form Marking Hazardous Substance Control Packing Type Remarks
SD7800 SOP-8-225-1.27 / Halogen free Tube
SD7800TR SOP-8-225-1.27 / Halogen free Tape & reel
Block Diagram

SD7800 中英文同.png