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RT8471 - High Brightness LED Driver

General Description

The RT8471 is a high efficiency, continuous mode inductive step-down converter, designed for driving single or multiple series connected LEDs from a voltage source higher than the LED voltage.

Key Features

  • 7V to 36V Input Voltage Range.
  • Hysteretic Control with High Side Current Sensing.
  • Internal N-MOSFET with 350mΩ Low RDS(ON).
  • 1A Output Current (For TSOT-23-5 Only).
  • 1.2A Output Current (For SOP-8 (Exposed Pad) and MSOP-8 (Exposed Pad) Only).
  • Up to 97% Efficiency.
  • Typical ±5% LED Current Accuracy.
  • Analog or PWM Control Signal for LED Dimming.
  • 300Hz On-Board Ramp Generator.
  • Input Under Voltage Lockout.
  • Thermal Shutdown Protection.
  • RoHS Co.

📥 Download Datasheet

Datasheet Details

Part number RT8471
Manufacturer Richtek
File Size 235.94 KB
Description High Brightness LED Driver
Datasheet download datasheet RT8471 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.

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® RT8471 1.2A/1A, Hysteretic, High Brightness LED Driver with Internal Switch General Description The RT8471 is a high efficiency, continuous mode inductive step-down converter, designed for driving single or multiple series connected LEDs from a voltage source higher than the LED voltage. It operates from an input voltage of 7V to 36V and employs hysteretic control with a high side current sense resistor to set the constant output current. The RT8471 includes an output switch and a high side output current sensing circuit, which uses an external resistor to set the nominal average output current. LED brightness control is achieved with PWM dimming from an analog or PWM input signal.