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RT8474 - High Voltage Multiple-Topology LED Driver

Description

The RT8474 is a current-mode LED driver supporting wide input voltage range from 4.5V to 50V and output voltage up to 50V.

With 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.
  • Under-Voltage Lockout.
  • Thermal Shutdown.
  • RoHS Compliant and Halogen Free.

📥 Download Datasheet

Datasheet Details

Part number RT8474
Manufacturer Richtek
File Size 196.48 KB
Description High Voltage Multiple-Topology LED Driver
Datasheet download datasheet RT8474 Datasheet

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Full PDF Text Transcription

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® RT8474 High Voltage Multiple-Topology LED Driver with Dimming Control General Description The RT8474 is a current-mode LED driver supporting wide input voltage range from 4.5V to 50V and output voltage up to 50V. With 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 RT8474 provides an internal soft-start function to avoid inrush current and thermal shutdown to prevent the device from overheat. The RT8474 is available in the SOP-8 (Exposed pad) package.
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