RT8463GQW

The RT8463GQW is a current mode PWM Regulator for LED driving applications. With a 2A power switch, wide input voltage (4.5 to 50V) and output voltage (up to 50V) ranges, the RT8463 can operate in any of the three common topologies of buck, boost or buck-boost. With 470kHz operating frequency, the size of the external PWM inductor and input/output capacitors can be minimized. High efficiency is achieved by a 100mV current sensing control. Brightness dimming can be controlled from either analogue or PWM signal. Unique built-in clamping comparator and filtering resistor allow easy low noise analogue dimming conversion from PWM signal with only one external capacitor.

• Built-in 2A power switch
• Current mode PWM control
• 300mΩ internal switch
• Adjustable soft-start to avoid inrush current
• Adjustable over-voltage protection to limit output voltage
• Thermal shutdown
• Under-voltage lockout
• external compensation

應用

Sensing & Instrumentation, Lighting