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LP3322 Arkusz danych(PDF) 1 Page - Lowpower Semiconductor inc |
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LP3322 Arkusz danych(HTML) 1 Page - Lowpower Semiconductor inc |
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1 / 8 page  Preliminary Datasheet LP3322 LP3322 – 00 Vesion 1.0 Datasheet Feb.-2013 www.lowpowersemi.com Page 1 of 8 High Performance, Constant Current Switching Regulator For 10PCS White LED In Series General Description The LP3322 is a 1.1MHz PWM boost switching regulator designed for constant- current white LED driver applications. The LP3322 can drive a string of up to 10 white LEDs in series or 3s9p LEDs from 3.6V, ensuring uniform brightness and eliminating several ballast resistors. The LP3322 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 200mV and 300mV, 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 LP3322 F: Pb-Free Package: B6: SOT23-6 FB Voltage Default: VFB=200mV A: VFB=300mV Pin Configurations (SOT23-6) Features High Efficiency: 88% 1.1MHzFixed-Frequency PWM Operation Maximum Output Voltage up to 36V Operating Range : 2.7V to 5.5V Shutdown Supply Current:<1uA Available in SOT23-6 Package Built-in 39V 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 10uH EN 4 FB 3 Vin 6 OUT 5 LP3322 Vin VFB=200mV Cin 10uF R1 10 Cout 1uF SD103 Marking information Please view website. |
Podobny numer części - LP3322 |
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Podobny opis - LP3322 |
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