Maxic Technology Corporation

MT9515LS

Description

The MT9515LS is a high-PF, non-isolate, BUCK LED Driver IC. MT9515LS 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 external VDD capacitor is not needed. The system realizes error integration through internal digital integrator, which eliminates COMP pin and COMP capacitor. MT9515LS can meet low THD and odd harmonic requirements through internal THD compensation circuit.

Various protections with self-recovery, such as input over voltage protection (OVP), cycle-by-cycle over current protection (OCP), over temperature protection, output short-circuit protection, output open-circuit protection, etc. are embedded to improve reliability. The chip programs the output over voltage protection threshold through an external circuit connection to the ROVP pin (e.g. open circuit, GND or a resistor with different resistance values).

The MT9515LS integrates feedback circuit and high voltage MOSFET, which further simplifies external circuit and saves the BOM cost.

Features

Single-stage active power factor correction (PF > 0.90)
Integrated ultra-high voltage power supply without external VDD capacitor and external power supply circuit
Embedded digital integrator, no COMP capacitor needed
Integrated THD compensation circuit
Integrated odd harmonic compensation circuit for high subharmonic distortion suppression
Internal line voltage compensation
Internal demagnetization sensing, no external feedback circuit needed
High accurate LED current
Good Line and Load Regulation
Quasi-Resonant mode (QRM) operation
Integrated Input OVP, when input voltage is higher than 375Vac, turns off the power switch, resumes at input voltage below 320Vac. Enhances anti-surge capability and improves system reliability
Set different output OVP thresholds through ROVP pin
Various protections and self-recovery
Power on soft-start
Available in SOP7 packages