LP3321 - Constant Current Switching Regulator

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.

Key Features

Up to 94% efficiency.
Shut-down current:.

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LP3321 constant current switching regulator by Lowpowersemi - Datasheet Preview

Datasheet Details

Part number	LP3321
Manufacturer	Lowpowersemi
File Size	491.33 KB
Description	Constant Current Switching Regulator
Datasheet	LP3321 Datasheet

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Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

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Preliminary Datasheet LP3321 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.