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 • High Voltage Capability : VIN Up to 36V, VOUT Up to 48V • Buck, Boost or Buck Boost Operation • Current Mode PWM with 350kHz Switching Frequency • Easy Dimming : Analog, PWM Digital or PWM Converting to Analog with One External Capacitor • Programmable Soft Start to Avoid Inrush Current • Programmable Over Voltage Protection • VIN Under Voltage Lockout and Thermal Shutdown • 16-Lead WQFN and SOP Packages • RoHS Compliant and Halogen Free
Application • General Industrial High Power LED Lighting • Desk Lights and Room Lighting • Building and Street Lighting • Industrial Display Backlight
Pin Configurations ( VIEW) 
SOP-16

WQFN-16L 3x3
Typical Applications Circuit

Figure 1. Analog Dimming in Boost Configuration 
Figure 2. PWM to Analog Dimming in Boost Configuration

Figure 3. Analog Dimming in Buck-Boost Configuration  Figure 4. Analog Dimming in Buck Configuration |
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