High Voltage Buck LED Driver with Dimming Control


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The RT8406A is a current-mode LED driver supporting wide input voltage range from 10V to 65V. With the high operating frequency 130kHz, the size of the external inductor and input/output capacitors can be minimized. High efficiency is achieved by a 100mV current sensing control. In addition, the RT8406A features low standby power. LED dimming control can be done from either analog or PWM signal and share the same pin. The RT8406A provides thermal shutdown to prevent the device from overheat. The RT8406A is available in the SOP-8 package.


  • DC-DC LED Lighting Driver
Key Spec.
Status Active
Supply Voltage (min) (V) 12
Supply Voltage (max) (V) 65
Vin (min) (V) 12
Vin (max) (V) 65
Topology Buck
Output C.C.
MOSFET Integrated No
Current Sense Threshold (mV) 100
Dimming Control Analog;PWM
Package Type SOP-8
  • Precise and Wide Dimming Range (2% to 100%)
  • Low Standby Power Consumption
  • High Input Voltage : VIN up to 65V
  • Current-Mode PWM Control
  • 130kHz High Switching Frequency
  • Analog and PWM Dimming Control and Share the Same Pin
  • Under-Voltage Lockout
  • Cycle-by-Cycle Current Limitation
  • Thermal Shutdown
  • Driver Capability : 350mA / -500mA
  • RoHS Compliant and Halogen Free