RT8482

® RT8482 High Voltage High Current LED Driver Controller for Buck Boost, or Buck-Boost Topology General Description The RT8482 is a current mode PWM controller designed to drive an external MOSFET for high current LED applications. With a current sense amplifier threshold of 190mV, the LED current is programmable with one external current sense resistor. With a maximum operating input voltage of 36V and output voltage up to 48V, the RT8482 is ideal for Buck, Boost or Buck-Boost operation. With 350kHz operating frequency, the external inductor and capacitors can be small while maintaining high efficiency. Dimming can be either analog or PWM digital. The unique built-in clamping comparator and filter allow easy low noise analog dimming conversion from PWM signal with only one external capacitor. The RT8482 is available in WQFN-16L 3x3 and SOP-16 packages. Features z High Voltage Capability : VIN Up to 36V, VOUT Up to 48V z Buck, Boost or Buck-Boost Operation z Current Mode PWM with 350kHz Switching Frequency z Easy Dimming : Analog, PWM Digital or PWM Converting to Analog with One External Capacitor z Programmable Soft Start to Avoid Inrush Current z Programmable Over Voltage Protection z VIN Under Voltage Lockout and Thermal Shutdown z 16-Lead WQFN and SOP Packages z RoHS Compliant and Halogen Free Applications z General Industrial High Power LED Lighting z Desk Lights and Room Lighting z Building and Street Lighting z Industrial Display Backlight Ordering Information RT84...