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RT8494 - High Voltage High Current LED Driver Controller

General Description

The RT8494 is a current mode PWM controller designed to drive an external MOSFET for high current LED applications.

With a current sense amplifier threshold of 190mV, the LED current is programmable with one external current sense resistor.

Key Features

  • High Voltage Capability : VIN up to 36V, LED Sensing Threshold Common Mode Voltage up to 90V.
  • Buck, Boost or Buck-Boost Operation.
  • Programmable Switching Frequency.
  • Easy Dimming Control : Analog or Digital Converting to Analog with One External Capacitor.
  • Programmable Soft-Start to Avoid Inrush Current.
  • Programmable Over-Voltage Protection.
  • VIN Under-Voltage Lockout and Thermal Shutdown.
  • AEC-Q100 Compliance.

📥 Download Datasheet

Datasheet Details

Part number RT8494
Manufacturer Richtek
File Size 262.46 KB
Description High Voltage High Current LED Driver Controller
Datasheet download datasheet RT8494 Datasheet

Full PDF Text Transcription for RT8494 (Reference)

Note: Below is a high-fidelity text extraction (approx. 800 characters) for RT8494. For precise diagrams, and layout, please refer to the original PDF.

® RT8494 High Voltage High Current LED Driver Controller for Buck, Boost or Buck-Boost Topology General Description The RT8494 is a current mode PWM controller designed t...

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ral Description The RT8494 is a current mode PWM controller designed to drive an external MOSFET for high current LED applications. With a current sense amplifier threshold of 190mV, the LED current is programmable with one external current sense resistor. With the maximum operating input voltage of 36V and output voltage up to 90V, the RT8494 is ideal for Buck, Boost or Buck-Boost operation. With the switching frequency programmable over 100kHz to 1MHz, the external inductor and capacitors can be small while maintaining high efficiency. Dimming can be done by either analog or digital.