DESCRIPTION
The MT7854BS 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. MT7854BS 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. MT7854BS also integrates compensation circuit, which eliminates COMP pin and COMP capacitor. MT7854BS can meet low THD requirements through internal THD compensation circuit.
Various protections such as over voltage protection (OVP), over current protection (OCP) and over temperature compensation, etc. are embedded to improve reliability. The MT7854BS 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
Built-in compensation circuit, no COMP capacitor is needed
Integrate THD compensation circuit, THD<15%
High subharmonic-Distortion-Suppression
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
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