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RT8470 - High Brightness LED Driver

Datasheet Summary

Description

The RT8470 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.

Features

  • z 7V to 30V Input Voltage Range z Hysteretic Control with High Side Current Sensing z Internal N-MOSFETs with 350mΩ Low RDS(ON) z 1A Output Current (For TSOT-23-5 Only) z 1.2A Output Current (For SOP-8 (Exposed Pad) Only) z Up to 97% Efficiency z Typical ±5% LED Current Accuracy z Analog or PWM Control Signal for LED Dimming z 300Hz On-Board Ramp Generator z Input Under Voltage Lockout z Thermal Shutdown Protection z RoHS Compliant and Halogen Free.

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Datasheet preview – RT8470

Datasheet Details

Part number RT8470
Manufacturer Richtek
File Size 254.77 KB
Description High Brightness LED Driver
Datasheet download datasheet RT8470 Datasheet
Additional preview pages of the RT8470 datasheet.

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Full PDF Text Transcription

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RT8470 1.2A/1A, Hysteretic, High Brightness LED Driver with Internal Switch General Description The RT8470 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 30V and employs hysteretic control with a high side current sense resistor to set the constant output current. The RT8470 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.
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