MT7840F

MT7840F is a high-PF, non-isolated LED driver with high precision output current. The floating-ground, high-side BUCK topology makes full wave detection possible.

MT7840F works in Quasi-Resonant Mode (QRM), which improves both of efficiency and EMI performance. 

The system integrates ultra-high voltage power supply circuit, startup resistor and power supply diode are not needed, low external component count and low BOM cost are achieved.

MT7840F integrates various protections with self-recovery, such as over-voltage protection (OVP), over-current protection (OCP) and over-temperature compensation, etc., to improve reliability.

The system driving capability is irrelevant to the power supply voltage, which greatly improves the EMI performance.

• Single-stage active power factor correction (PFC > 0.90)

• Ultra-high voltage power supply without startup resistor and power supply diode

• High accuracy LED current: ±3%

• Good Line and Load Regulation (±2%)

• Operates in QRM

• Output current foldback at low input voltage

• Support Buck and Buck/Boost Topology

• Various protection features

• Available in SOP8 packages