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LP3320 Datasheet(PDF) 1 Page - Lowpower Semiconductor inc |
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LP3320 Datasheet(HTML) 1 Page - Lowpower Semiconductor inc |
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1 / 9 page  LP3320-00 Jan.-2018 Email: marketing@lowpowersemi.com www.lowpowersemi.com Page 1 of 9 Preliminary Datasheet LP3320 High Performance, Constant Current Switching Regulator For 11PCS White LED In Series General Description The LP3320 is a 1.0MHz PWM boost switching regulator designed for constant-current white LED driver applications. The LP3320 can drive a string of up to 11 white LEDs in series, ensuring uniform brightness and eliminating several ballast resistors. The LP3320 implements a constant frequency 1.0MHz 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. Order Information LP3320 F: Pb-Free Package Type B6: SOT23-6 QV:TDFN-6 Applications WLED Backlight driver OLED Backlight driver PDA MID/PTV Features Up to 94% efficiency Shut-down current:<1uA Output voltage Up to 37V Internal Compensation, Soft-start Support down to 1% Dimming Duty Cycle 1.0MHz fixed frequency switching High switch on current:1.5A Available in SOT23-6&TDFN-6(2mm×2mm) Package Typical Application Circuit VIN EN NC LX 6 4 1 5 2 GND LED+ VIN 4.7uH C2 2.2uF R1 12Ω C1 10uF FB 3 LED- Marking Information Device Marking Package Shipping LP3320B6F LPS FuYWX SOT23-6 3K/REEL LP3320QVF LPS FuYWX TDFN-6 4K/REEL Marking indication: Y:Production year W:Production week X:Production batch |
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