RT8476

® RT8476 Two-Stage Hysteretic LED Driver Controller General Description The RT8476 is a two-stage controller with dual gate drivers consist of a Boost converter (first stage) and a Buck converter (second stage). The advantage of the two-stage topology is highly compatible with ET (Electronic Transformer) in MR16 / AR111 lighting market field applications. The first stage is a Boost converter for constant voltage output with inductor peak current over current protection. The second stage is a Buck converter for constant output current by typical constant peak current regulation. The RT8476 is equipped with dual output gate drivers for external power MOSFETs, suitable for higher power applications. The RT8476 is available in the SOP-8 and SOP-8 (Exposed pad) packages. Applications z MR16 Lighting z Signage and Decorative LED Lighting z Architectural Lighting z High Power LED Lighting z Low Voltage Industrial Lighting z Indicator and Emergency Lighting z Automotive LED Lighting Features z Two-Stage Topology (Boost + Buck) z Wide Input Voltage Range : 4.5V to 40V z Adjustable Peak Input Current Control z Adjustable Boost Output Voltage z Independent Dual Stage Function z Adjustable LED Current with ±5% LED Current Accuracy z Input Under Voltage Lockout Detection z Thermal Shutdown Protection z SOP-8 and SOP-8 (Exposed Pad) Packages z RoHS Compliant and Halogen Free Ordering Information RT8476 Package Type S : SOP-8 SP : SOP-8 (Exposed Pad-Option 2) Lead Plating System G : ...