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RT4503 - Asynchronous Boost Converter

Description

The RT4503/A is a highly integrated LED driver IC capable of driving 10 WLEDs in series.

It is composed of a current mode Boost converter integrated with a 36V/1.2A power switch.

The RT4503/A supports a wide input voltage range from 2.5V to 5.5V and runs at a fixed frequency of 550kHz.

Features

  • 2.5V to 5.5V Input Voltage Range.
  • 36V Open LED Protection for 10 WLEDs.
  • Pulse Dimming Brightness Control.
  • 200mV Reference Voltage with ±2% Accuracy.
  • 550kHz Switching Frequency.
  • Built-In Soft-Start.
  • Over-Temperature Protection.
  • Internal Compensation.
  • Current Limit Ordering Information RT4503/A Package Type QW : WDFN-6L 2x2 (W-Type) Lead Plating System G : Green (Halogen Free and Pb Free) Note : RT4503 : PWM Dimming RT4503A : Pulse Dimming Richt.

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Datasheet preview – RT4503

Datasheet Details

Part number RT4503
Manufacturer Richtek Technology
File Size 266.31 KB
Description Asynchronous Boost Converter
Datasheet download datasheet RT4503 Datasheet
Additional preview pages of the RT4503 datasheet.

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Full PDF Text Transcription

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® RT4503/A Asynchronous Boost Converter for 10 WLEDs General Description The RT4503/A is a highly integrated LED driver IC capable of driving 10 WLEDs in series. It is composed of a current mode Boost converter integrated with a 36V/1.2A power switch. The RT4503/A supports a wide input voltage range from 2.5V to 5.5V and runs at a fixed frequency of 550kHz. The LED current is set via an external resistor and the feedback voltage is regulated to 200mV. For brightness dimming, the RT4503A supports 32 steps pulse dimming which determines the feedback reference voltage, and RT4503 support PWM dimming which determines the feedback reference voltage. Applications  Cellular Phones  Digital Cameras  Probable Instruments Features  2.5V to 5.
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