RichTek Technology Corporation LED Drivers RT9285BGJ6

The RT9285BGJ6 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 electromagnetic interference (EMI). The device includes an internal diode and offers up to 85% efficiency, along with built-in protections such as 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 RT9285BGJ6 is available in compact TSOT-23-6 and WDFN-8L 2x2 packages, which are advantageous for space-constrained designs. Additionally, it incorporates a soft-start function to limit inrush current and supports digital pulse dimming and PWM clock dimming for flexible brightness control. This product is RoHS compliant and suitable for various portable electronic devices, including smartphones and digital cameras.