General Description
QX9911 is a high precision, high PF, AC-DC LED driver which is widely used in non-isolated LED driver power supply.
QX9911 is operated in Transition Mode which can efficiently improve system efficiency. QX9911 also supports the power factor correction function (PFC) by controlling fixed on-time, which is up to 0.95.
QX9911 realizes very high precision output current control by comparing the sampled system output average current with built-in high precision reference.
QX9911 integrates comprehensive protection functions include current limit protection cycle-by-cycle (OCP), output over voltage protection, output short circuit protection and over temperature protection (OTP) to ensure drive the LED reliably.
Features
Transition Mode
Voltage Mode control
High power factor correction: up to 0.95
The max ton can be adjusted
VCC under voltage protection
VCC clamp, over voltage protection
Output over voltage protection
LED short circuit protection
Gate Voltage Clamp
Current Limit cycle by cycle
Over temperature protection
Applications
AC-DC LED Driver
E17、E27、PAR、T8 LED Driver
Supply for Adapter ,TV or Monitor |
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