LP3321-LED Driver

产品型号 输入电压(V) 功能 驱动个数（pcs） 开关电流（mA） 开关频率(Hz) 反馈电压（mV） 应用 特征 封装 规格书
LP3321 2.5-5.5 Boost 3S12P,11S1P 1500 1M 200 Backlight OVP,SS,OTP,Constant current,Low size SOT23-6/DFN-6


High Performance, Constant Current Switching Regulator For 11PCS White LED In Series


General Description

The LP3321 is a 1.0MHz PWM boost switching regulator designed for constant-current white LED driver applications. The LP3321 can drive a string of up to 11 white LEDs in series, ensuring uniform brightness and eliminating several ballast resistors. The LP3321 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 200mV, 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.
 

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






 

Marking Information
 

Please see specification. 
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We will send a copy to you as fast as we can.
 


 

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