DESCRIPTION

The MT7844S is a high-PF, non-isolate LED

Driver IC. The floating-ground, high-side BUCK

topology makes full wave detection possible.

High precision output current is achieved.

MT7844S 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 MT7844S

integrates 550V MOSFET, which further

simplifies external circuit.

FEATURES

 Single-stage active power factor correction

(PFC > 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 SOP7 packages

APPLICATIONS

 E14/E27/PAR30/PAR38/GU10 LED lamp

 T8/T10 LED tube

 Other LED lighting applications