RT8470

RT8470 1.2A/1A, Hysteretic, High Brightness LED Driver with Internal Switch General Description The RT8470 is a high efficiency, continuous mode inductive step-down converter, designed for driving single or multiple series connected LEDs from a voltage source higher than the LED voltage. It operates from an input voltage of 7V to 30V and employs hysteretic control with a high side current sense resistor to set the constant output current. The RT8470 includes an output switch and a high side output current sensing circuit, which uses an external resistor to set the nominal average output current. LED brightness control is achieved with PWM dimming from an analog or PWM input signal. The RT8470 is available in a small TSOT-23-5 package or a more thermal efficient SOP-8 (Exposed Pad) package. Ordering Information RT8470 Package Type J5 : TSOT-23-5 SP : SOP-8 (Exposed Pad-Option 1) 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 RT8470GJ5 BS=DNN BS= : Product Code DNN : Date Code RT8470GSP RT8470 GSPYMDNN RT8470GSP : Product Number YMDNN : Date Code Features z 7V to 30V Input Voltage Range z Hysteretic Control with High Side Current Sensing z Internal N-MOSFETs with 350mΩ Low RDS(ON) z 1A Output Current (For TSOT-23-5 Only) z 1.2A Output Current (For SOP-8 (Exposed Pad) ...