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MPQ2489 - Step Down White LED Driver

Description

The MPQ2489 is a high efficiency step-down converter designed in continuous current mode for driving the high brightness Light Emitting Diodes (LED) from wide input voltage 6V

55V.

Features

  • Guaranteed Industrial/Automotive Temp.
  • Internal 60V MOSFET.
  • Wide 6V to 55V Input Range.
  • ļ‚³1A Output Current.
  • High Efficiency (>95%).
  • Hysteresis Control.
  • PWM & Analog Dimming.
  • 1000:1 PWM Dimming Resolution.
  • Thermal Shutdown.
  • Inherent Open LED Protection.
  • Short LED Protection.
  • Available in QFN6(3x 3mm) Package.
  • Available in AEC-Q100 Grade 1.

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Full PDF Text Transcription

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The Future of Analog IC Technology DESCRIPTION The MPQ2489 is a high efficiency step-down converter designed in continuous current mode for driving the high brightness Light Emitting Diodes (LED) from wide input voltage 6Vā€“55V. The MPQ2489 employs hysteretic control architecture to regulate a high accuracy LED current, which is measured through an external high-side current sensing resistor. Moreover, this control scheme provides optimized circuit stabilization and very quick response time without the loop compensation. Its low 202mV average feedback voltage reduces power loss and improves the converter efficiency. The MPQ2489 implements PWM and analog dimming together with DIM pin. The MPQ2489 includes thermal overload protection preventing damage in the event of an output overload.
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