RT8480

® RT8480 High Voltage Boost/SEPIC Controller General Description The RT8480 is a current mode PWM controller designed to drive an external MOSFET for high current LED applications. With a low side current sense amplifier threshold of 190mV, the LED current is programmable with one external current sense resistor. With programmable operating frequency up to 800kHz, the external inductor and capacitors can be small while maintaining high frequency. Dimming can be done by either analog or digital. A built-in clamping comparator and filter allow easy low noise analog dimming conversion from digital signal with only one external capacitor. An unique True PWM dimming control is made easy with MOSFET under LED string. A very high dimming ratio can be achieved by adopting both analog/ digital dimming and True PWM dimming together. The RT8480 is available in a SOP-16 package. Ordering Information RT8480 Package Type S : SOP-16 Lead Plating System G : Green (Halogen Free and Pb Free) Note : Richtek products are :  RoHS compliant and compatible with the current requirements of IPC/JEDEC J-STD-020.  Suitable for use in SnPb or Pb-free soldering processes. Marking Information RT8480 GSYMDNN RT8480GS : Product Number YMDNN : Date Code Features  High Voltage Capability : VIN Up to 36V, VOUT is limited by External MOSFET Switch  Boost Operation  Current Mode PWM with Programmable Switching Frequency  Easy Dimming Control : Analog or Digital Converting to Analog with One Exte...