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Power MOSFET Integrated High Efficiency BCM LED Driver Controller for High Power Factor Applications

RT8497

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The RT8497 integrates a power MOSFET and a Boundary mode controller. It is used for step down converters by well controlling the internal MOSFET and regulating a constant output current.

The RT8497 features a ZCS detector which keeps system operating in BCM and obtaining excellent power efficiency, better EMI performance.

The RT8497 achieves high Power Factor Correction (PFC) and low Total Harmonic Distortion of Current (THDi) by a smart internal line voltage compensation circuit which has minimized system component counts; saved both PCB size and total system cost.

Especially, the RT8497 can use a cheap simple drum core inductor in the system instead of an EE core to obtain high efficiency.

The RT8497 is housed in a SOP-8 package. Thus, the components in the whole LED driver system can be made very compact.

Applications

  • E27, PAR, Light Bar, Offline LED Lights
Key Spec.
RT8497 RT8497A RT8497B RT8497C RT8497D
Status Active Active Active Active Active
Supply Voltage (min) (V) 10 10 10 10 10
Supply Voltage (max) (V) 30 30 30 30 30
Vin (min) (V)
Vin (max) (V)
Topology Buck Buck Buck Buck Buck
Output C.C. C.C. C.C. C.C. C.C.
MOSFET Integrated Yes Yes Yes Yes Yes
PFC Y Y Y Y Y
Current Sense Threshold (mV) 250 250 250 250 250
Dimming Control
Features LED Open Protection;LED Short Protection;OCP;OVP;Thermal Protection LED Open Protection;LED Short Protection;OCP;OVP;Thermal Protection LED Open Protection;LED Short Protection;OCP;OVP;Thermal Protection LED Open Protection;LED Short Protection;OCP;OVP;Thermal Protection LED Open Protection;LED Short Protection;OCP;OVP;Thermal Protection
Package Type SOP-8 SOP-8 SOP-8 SOP-8 SOP-8
Features
  • Built-In Power MOSFET
  • Support High Power Factor and THDi Consideration Applications
  • Programmable Constant LED Current with Highly
  • Precision Current Regulation
  • Extremely Low Quiescent Current Consumption and 1μA Shutdown Current
  • True Low System BOM Cost and Economical Floating Buck Converter Solution
  • Unique Programmable AND Pin for ZVS Setting to Achieve Best Power Efficiency
  • Universal Input Voltage Range with Off-Line Topology
  • Built-in Over Thermal Protection
  • Built-in Over Voltage Protection
  • Output LED String Open Protection
  • Output LED String Short Protection
  • Output LED String Over Current Protection
Datasheet
TitleLast UpdateShareDownload
Power MOSFET Integrated High Efficiency BCM LED Driver Controller for High Power Factor Applications2015/03/27
Technical Documents
TitleLast UpdateShareDownload
Power Solutions for LED Lighting Applications2018/11/22
Minimizing Light Flicker in LED Lighting Applications2018/08/15
Additional Documents
Title Last Update ShareDownload
AC/DC Non-Isolated BCM Floating Buck LED Driver Controller - RT8487, RT8497 2019/03/04
Non-isolated LED Lighting Driver IC Performance Test Report - RT8487, RT8497 2019/03/04
Evaluation Boards
TitleLast UpdateShareDownload
Power MOSFET Integrated High Efficiency BCM LED Driver Controller for High Power Factor Applications2018/11/01
RT8497AGS Power MOSFET Integrated High Efficiency BCM LED Driver Controller for High Power Factor Applications2018/11/01
RT8497C LED Driver Controller for High Power Factor Applications Evaluation Board2017/07/14
Part NumberPackage TypePackage Qty.Free SampleBuy From Authorized Distributor
RT8497AGSSOP-82500 Request Buy from Distributor
RT8497BGSSOP-82500 Request Buy from Distributor
RT8497GSSOP-82500 Not available Buy from Distributor
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