QX5241 is a buck, constant current, high-efficiency LED driver suitable for wide input voltage range applications. It has high current accuracy, fast response speed, high suppression ratio, and brightness control function.
The QX5241 is a step‑down, constant‑current LED driver with a wide input range (5.5 V‑36 V) and high‑frequency operation up to 2 MHz. It offers ±5 % current accuracy, 20 % inductor current ripple, and operates from –40 °C to 125 °C in a compact SOT‑23‑6 package.
The manual includes a product overview, pin definitions, detailed electrical characteristics, typical efficiency curves, an application guide with design formulas, and package dimensions, helping designers integrate the driver into lighting, automotive tail‑lamp, and other high‑luminance LED applications. This manual is written in Chinese.
| Input voltage range | 5.5 V – 36 V |
|---|---|
| Switching frequency | 2 MHz |
| Current accuracy | ±5 % |
| Inductor current ripple | 20 % |
| Operating temperature range | -40 °C – 125 °C |
| Package | SOT‑23‑6 |
| Maximum output power | 25 W |
The driver operates with an input voltage from 5.5 V up to 36 V.
Output current is set by an external resistor (RSENSE) placed between VIN and CSN.
The driver can operate at frequencies up to 2 MHz.