The MT7845Y is a high-PF, Buck-Boost, non-isolate LED Driver IC. It adopts floating-ground, high-side detection topology to achieve high precision output current.  MT7845Y works in Quasi-Resonant Mode (QRM), which improves both of efficiency and EMI performance. The system integrates the ultra-high voltage power supply circuit, the start-up resistor and power supply diode are not needed. Low external component count and cost is achieved. 
Various protections such as over voltage protection (OVP), over current protection (OCP) and over temperature compensation, etc. are embedded to improve reliability. The MT7845Y integrates 600V MOSFET, which further simplifies external circuit.



  • Single-stage active power factor correction (PF>0.90)
  • Ultra-high voltage power supply without start-up resistor and power supply diode
  • High accurate LED current (±3%) 
  • Good Line and Load Regulation (±2%) 
  • Quasi-Resonant mode (QRM) operation 
  • Various protection schemes
  • Available in SOP8 packages