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RT9269 Datasheet(PDF) 1 Page - Richtek Technology Corporation |
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RT9269 Datasheet(HTML) 1 Page - Richtek Technology Corporation |
1 / 10 page Preliminary RT9269 DS9269-01 March 2003 www.richtek.com 1 Tiny Package, High Efficiency, Constant Current LED Driver General Description The RT9269 is a compact, high efficient LED driver with high flexibility of application configurations in charge pump mode or in boost rectifier mode, delivering Tens of mA constant output current for driving 1~4 white LED’s. The 0.25V low reference voltage minimized the power loss across the current-setting resistor. The wide applicable VDD range makes RT9269 suitable for 1 to 4 battery cell applications as well as being supplied with 2.5/3.3/5/6V system powers. The 500kHz high switching rate minimized the size of external components. Besides, the 17 µA low quiescent current together with high efficiency maintains long battery lifetime. The output current is set with 1 external resistor. And the chip enable (CE) pin can be used for tuning the LED brightness by controlling the ON/OFF duty with external clock. RT9269 is provided in SOT-26 package. Ordering Information RT9269 Marking Information For marking information, contact our sales representative directly or through a RichTek distributor located in your area, otherwise visit our website for detail. Features 0.25V Low Reference Voltage 17 µA Quiescent (Switch-off) Supply Current Zero Shutdown Mode Supply Current 85% Efficiency 500kHz Fixed Switching Rate Tuning LED brightness with CE pin ON/OFF Duty Small SOT-26 Package Applications LED Module Hand Held Panel Compact Back Light Module Small Battery Charger Constant Current Source Pin Configurations Part Number Pin Configurations RT9269CE (Plastic SOT-26) TOP VIEW 1. CE 2. EXT 3. GND 4. LX 5. VDD 6. FB 64 3 2 1 5 Operating Temperature Range C: Commercial Standard Package Type E : SOT-26 |
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