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Cellular Phones
Cellular Phones
Digital Cameras
PDAs and Smart Phones
Porbable Instruments
MP3 Player
OLED Power
VIN Operating Range : 2.7V to 5.5V
VIN Operating Range : 2.7V to 5.5V
Up to 85% Efficiency
22V Internal Power N-MOSFET
1MHz Switching Frequency
Built-in Diode
Digital Dimming with Zero-Inrush
Input UVLO Protection
Output Over Voltage Protection
Internal Soft Start and Compensation
TSOT-23-6 and 8-Lead WDFN Package
RoHS Compliant and 100% Lead (Pb)-Free
Tiny Package, High Performance, Diode Embedded White LED Driver
The RT9285B is a high frequency asynchronous boost converter with internal ,diode, which can support 2 to 5 White LEDs for backlighting and OLED power ,supply. The Internal soft start function can reduce the inrush current. The ,device operates with 1MHz fixed switching frequency to allow small external ,components and to simplify possible EMI problems. The device comes with 20V ,over voltage protection to allow inexpensive and small-output capacitors with ,lower voltage rating. The LED current is initially set with the external sense ,resistor RSET, and the feedback voltage is 250mV. Tiny package type TSOT-23-6 ,and WDFN-8L 2x2 packages provide the best solution for PCB space saving and ,total BOM cost.
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