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RT9385 Datasheet(PDF) 1 Page - Richtek Technology Corporation |
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RT9385 Datasheet(HTML) 1 Page - Richtek Technology Corporation |
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1 / 10 page  RT9385 1 DS9385-01 April 2011 www.richtek.com Ordering Information Note : Richtek products are : RoHS compliant and compatible with the current require- ments of IPC/JEDEC J-STD-020. Suitable for use in SnPb or Pb-free soldering processes. Marking Information For marking information, contact our sales representative directly or through a Richtek distributor located in your area. Pin Configurations (TOP VIEW) WQFN-16L 2x3 5 Channels 125mA x1/x1.5/x2 Charge Pump White LED Driver General Description The RT9385 is a 5 Channel WLED driver with auto mode selection of x1, x1.5 and x2 mode with low dropout voltage in current sources. The RT9385 can power up to 5 white LEDs with regulated constant current for uniform intensity. Each channel (LED1 to LED5) can support up to 25mA. The part maintains highest efficiency by utilizing x1/x1.5/ x2 fractional charge pump and low dropout current regulators. For the brightness control, user can easily use a PWM signal generated from GPIO to control the brightness of WLEDs. The RT9385 is available in a WQFN-16L 2x3 package. Small 1 μF capacitors can be used for fly capacitors. It provides the best backlighting solution with high efficiency and smallest board space for portable application. Features 85% Average Efficiency Over Li-ion Battery Discharge Support Up to 5 White LEDs Support Up to 25mA/Per Channel PWM Brightness Control 60mV Current Source Dropout 1% LED Current Accuracy 0.7% LED Current Matching Automatic x1/x1.5/x2 Charge Pump Mode Transition Low Input Noise and EMI Over Voltage Protection Power On/Mode Transition Inrush Protection 1MHz Switching Frequency 0.4 μμμμμA Low Shutdown Current RoHS Compliant and Halogen Free Applications Camera Phone, Smart Phone White LED Backlighting LED3 AGND VOUT LED5 LED4 EN VIN CF PGND C2P 13 12 11 10 14 15 16 1 2 3 4 8 7 6 17 GND 9 5 RT9385 Package Type QW : WQFN-16L 2x3 (W-Type) Lead Plating System G : Green (Halogen Free and Pb Free) |
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