RT8497 Power MOSFET Integrated High Efficiency BCM LED Driver Controller for High Power Factor Applications
●General Description
■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.
●Features
■Built-In Power MOSFET
■Support High Power Factor and Low THDi Applications
■Programmable Constant LED Current with High-Precision Current Regulation
■Extremely Low Quiescent Current Consumption and 1μA Shutdown Current
■Compact Floating Buck Topology with Low Component Counts, Small PCB Size, and Low System BOM Cost
■Unique Programmable AND Pin for ZVS Setting to Achieve Best Power Efficiency
■Support Off-Line Universal Input Voltage Range
■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
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RT8497□□□ 、 RT8497 、 RT8497GS 、 RT8497BGS 、 RT8497DGS 、 RT8497AGS 、 RT8497CGS 、 RT8497A 、 RT8497B 、 RT8497C 、 RT8497D |
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[ Light Bar ][ Offline LED Lights ] |
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Datasheet |
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Please see the document for details |
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SOP-8 |
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English Chinese Chinese and English Japanese |
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October 2015 |
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DS8497-02 |
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1006 KB |
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