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High Voltage High Current LED Driver Controller for Buck Boost, or Buck-Boost Topology

RT8482

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The RT8482 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 a maximum operating input voltage of 36V and output voltage up to 48V, the RT8482 is ideal for Buck, Boost or Buck-Boost operation.

With 350kHz operating frequency, the external inductor and capacitors can be small while maintaining high efficiency.

Dimming can be either analog or PWM digital. The unique built-in clamping comparator and filter allow easy low noise analog dimming conversion from PWM signal with only one external capacitor.

The RT8482 is available in WQFN-16L 3x3 and SOP-16 packages.

Applications

  • General Industrial High Power LED Lighting
  • Desk Lights and Room Lighting
  • Building and Street Lighting
  • Industrial Display Backlight
Key Spec.
RT8482
Status Active
Vin (min) (V) 6
Vin (max) (V) 36
Vout (max) (V) 48
LED Channels 1
Topology Boost;Buck
SW Freq (typ) (kHz) 350
Vcs (typ) (mV) 190
Dimming Control Analog;PWM;PWM-to-Analog
Features Adjustable Frequency;Adjustable Soft-Start;Enable Input;OCP;OVP
Package Type SOP-16;WQFN3x3-16
Features
  • High Voltage Capability : VIN Up to 36V, VOUT Up to 48V
  • Buck, Boost or Buck-Boost Operation
  • Current Mode PWM with 350kHz Switching Frequency
  • Easy Dimming : Analog, PWM Digital or PWM 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
  • 16-Lead WQFN and SOP Packages
  • RoHS Compliant and Halogen Free
Datasheet
TitleLast UpdateShareDownload
High Voltage High Current LED Driver Controller for Buck Boost, or Buck-Boost Topology2009/12/25
Reliability
Title Last Update ShareDownload
High Voltage High Current LED Driver Controller for Buck Boost, or Buck-Boost Topology 2015/05/19
Technical Documents
TitleLast UpdateShareDownload
Minimizing Light Flicker in LED Lighting Applications2018/08/15
Part NumberPackage TypePackage Qty.Free SampleBuy From Authorized Distributor
RT8482GSSOP-162500 Not available Buy from Distributor
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