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RT8474A - High Voltage Multiple-Topology LED Driver

Description

The RT8474A is a current-mode LED driver supporting wide input voltage range from 4.5V to 50V in multiple topologies.

With the internal 500kHz operating frequency, the size of the external PWM inductor and input/output capacitors can be minimized.

Features

  • High Voltage : VIN Up to 50V, VOUT Up to 50V.
  • Support Multiple-Topologies (Buck / Boost / Buck- Boost).
  • Built-In 2A Power Switch.
  • Current-Mode PWM Control.
  • 500kHz Fixed Switching Frequency.
  • Analog or PWM Control Signal for LED Dimming.
  • Internal Soft-Start to Avoid Inrush Current.
  • OVP Pin for Adjustable OVP Level Protection (for Buck Only).
  • Under-Voltage Lockout.
  • Thermal Shutdown.
  • RoHS Compliant and Halogen Free Ordering Information RT8474.

📥 Download Datasheet

Datasheet Details

Part number RT8474A
Manufacturer Richtek
File Size 204.26 KB
Description High Voltage Multiple-Topology LED Driver
Datasheet download datasheet RT8474A Datasheet

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Full PDF Text Transcription

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® RT8474A High Voltage Multiple-Topology LED Driver with Open Detection General Description The RT8474A is a current-mode LED driver supporting wide input voltage range from 4.5V to 50V in multiple topologies. With the internal 500kHz operating frequency, the size of the external PWM inductor and input/output capacitors can be minimized. High efficiency is achieved by a 100mV current sensing control. LED dimming control can be done from either analog or PWM signal. The RT8474A provides an internal soft-start function to avoid inrush current and thermal shutdown to prevent the device from overheat. The RT8474A is available in the SOP-8 (Exposed pad) package.
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