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LP3385 Arkusz danych(PDF) 1 Page - Lowpower Semiconductor inc |
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LP3385 Arkusz danych(HTML) 1 Page - Lowpower Semiconductor inc |
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1 / 9 page  Preliminary Datasheet LP3385 LP3385 – 00 Version 1.0 Datasheet FEB.-2012 www.lowpowersemi.com Page 1 of 9 High Performance, Constant Current Switching Regulator For 39PCS White LED Driver General Description The LP3385 is a 1.2MHz PWM boost switching regulator designed for constant- current white LED driver applications. The LP3385 can drive a string of up to 10 white LEDs in series, ensuring uniform brightness and eliminating several ballast resistors. The LP3385 implements a constant frequency 1.2MHz 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 300 mV, 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 LP3385 F: Pb-Free Package: B6: SOT23-6 Pin Configurations (SOT23-6) Features High Efficiency: 92% 1.2MHzFixed-Frequency PWM Operation Maximum Output Voltage up to 36V Operating Range : 2.7V to 6V Shutdown Supply Current:<1uA Available in SOT23-6 Package Built-in 36V Over Voltage Protection Minimize the External Component RoHS Compliant and 100% Lead (Pb)-Free Applications WLED Backlight driver OLED Backlight driver PDA MID/PTV Typical Application Circuit Cout 1uF 22uH Cin 10uF R1 15 Vin VFB=300mV PWM EN 4 FB 3 Vin 6 OVP 5 U80 LP3385 Marking information Part Number Top Marking Package LP3385B6F F8 SOT23-6 Other Information please view website: www.lowpowersemi.com. |
Podobny numer części - LP3385 |
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Podobny opis - LP3385 |
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