The RT8462 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 the maximum operating input voltage of 36V and output voltage up to 60V, the RT8462 is ideal for buck, boost or buck-boost operation.

With the switching frequency programmable over 100kHz to 1MHz, the external inductor and capacitors can be small while maintaining high efficiency.

Dimming can be done by either analog or digital. The built-in clamping comparator and filter allow easy low noise analog dimming conversion from digital signal with only one external capacitor.

The RT8462 is available in SOP-14 and WQFN-16L 3x3 packages.

应用

General Industrial High Power LED Lighting

Desk Lights and Room Lighting

Building and Street Lighting

Industrial Display Backlight

关键特性

High Voltage Capability : VIN Up to 36V, LED Sensing Threshold Common Mode Voltage Up to 60V

Buck, Boost or Buck-Boost Operation

Programmable Switching Frequency

Easy Dimming Control : Analog or Digital 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

RoHS Compliant and Halogen Free