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LP3302S Datasheet(PDF) 1 Page - Lowpower Semiconductor inc |
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LP3302S Datasheet(HTML) 1 Page - Lowpower Semiconductor inc |
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1 / 11 page  Preliminary Datasheet LP3302S LP3302S –02 Version 1.2 Datasheet Feb.-2012 www.lowpowersemi.com Page 1 of 11 High Performance, Constant Current Switching Regulator For White LED General Description The LP3302S is a 1.1MHz PWM boost switching regulator designed for constant- current white LED driver applications. The LP3302S can drive a string of up to 8 white LEDs from a 3.3V supply or 3S9P white LEDs from a 5V supply in series, ensuring uniform brightness and eliminating several ballast resistors. The LP3302S implements a constant frequency 1.1MHz PWM control scheme. The high frequency PWM operation also saves board space by reducing external component sizes. To improve efficiency, the feedback voltage is set to 250mV, which reduces the power dissipation in the current setting resistor. Highly integration and internal compensation network minimizes as 5 external component counts. Optimized operation frequency can meet the requirement of small LC filters value and low operation current with high efficiency. Ordering Information LP3302S F:Pb-free J6:TSOT23-6 B6: SOT23-6 Pin Configurations SOT23-6/TSOT23-6 Features High Efficiency: 88% 1.1MHz Fixed-Frequency PWM Operation Maximum Output Voltage up to 27.5V Operating Range : 2.7V to 6V Shutdown Supply Current:<1uA Available in T/SOT23-6 Package Built-in Over Voltage Protection Minimize the External Component RoHS Compliant and 100% Lead Pb-Free Applications WLED Backlight driver OLED Backlight driver PDA DSC Camera Flash WLED driver Typical Application Circuit + 4.7uH + Vin LP3302S 4 3 6 5 EN FB Vin OUT 1uF 1uF Marking information Please view website. |
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