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RT4503A - Asynchronous Boost Converter

Download the RT4503A datasheet PDF. This datasheet also covers the RT4503 variant, as both devices belong to the same asynchronous boost converter family and are provided as variant models within a single manufacturer datasheet.

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.

Key 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.

📥 Download Datasheet

Note: The manufacturer provides a single datasheet file (RT4503-RichtekTechnology.pdf) that lists specifications for multiple related part numbers.

Datasheet Details

Part number RT4503A
Manufacturer Richtek Technology
File Size 266.31 KB
Description Asynchronous Boost Converter
Datasheet download datasheet RT4503A 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.

View original datasheet text
® 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.