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LM2707 - Inductive-Boost Series LED Driver

General Description

The LM2707 is a magnetic boost regulator specifically designed for white LED drive applications.

Key Features

  • 18V output capability, PFM regulation, and a high-current switching transistor (400mA peak). These characteristics allow the part to drive a series string of 2-to-4 LEDs with forward currents between 0 and 40mA. LED brightness can be adjusted dynamically simply by applying a PWM signal to the enable (EN) pin. The PWM signal can be as fast as 50kHz because the LM2707 has a fast turn-on time. In addition to LED-drive.

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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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LM2707 Inductive-Boost Series LED Driver with Programmable Oscillator Frequency February 2005 LM2707 Inductive-Boost Series LED Driver with Programmable Oscillator Frequency General Description The LM2707 is a magnetic boost regulator specifically designed for white LED drive applications. Tightly regulated LED currents, exceptional LED brightness uniformity, and very high LED-drive power efficiency ( > 80%) can all be achieved by stacking the LEDs in series between the www.DataSheet4U.com LM2707 output and the low-voltage feedback pin (0.515V). The LM2707 requires only a few small external components. A small inductor with a low saturation current rating can safely be used because the tightly controlled current limit circuit prevents large inductor current spikes, even at startup.