RichTek Technology Corporation LED Drivers RT9285CGQW

The RT9285CGQW is a high-frequency asynchronous boost converter designed for driving 2 to 5 white LEDs, making it suitable for applications such as backlighting and OLED power supplies. It operates within an input voltage range of 2.7V to 5.5V and features a fixed switching frequency of 1MHz, which helps minimize the size of external components and reduce EMI issues. The device includes an internal diode and offers up to 85% efficiency, along with a built-in soft start function to limit inrush current. Key protective features include 20V over-voltage protection and input under-voltage lockout (UVLO). The LED current can be set using an external sense resistor, with a feedback voltage of 250mV. The RT9285CGQW is available in compact package options, including TSOT-23-6, XDFN-8L 2x2, and WDFN-8L 2x2, which are designed for space-saving on PCBs. The product is RoHS compliant and suitable for both Pb-free and SnPb soldering processes.