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The RT8549L is a high efficiency Boost converter with 4-CH LED driver supporting 60V maximum output voltage. It is designed for LCD panel applications that employs LED as lighting sources. The Boost converter generates a suitable output voltage to drive four LED strings in parallel and supports up to 18 LEDs per string. The RT8549L supports a wide input voltage range from 4.2V to 24V and provides a SMBus interface to control the LED brightness dimming mode, operating frequency and LED currents. The internal 150mΩ, 60V power switch with current-mode control provides high efficiency operation. The RT8549L is available in the WDFN-16L 5x5 package to achieve optimized solution for PCB space.
Wide Operating Input Voltage : 4.2V to 24V
Max 60V Output Voltage
3% LED Current Accuracy
2% LED Current Matching
Low Drop Output 120mA/0.4V Current Sink
SMBus Programs LED Current, Switching Frequency, Dimming Mode
LED Current : 22.58mA to 180mA
Switching Frequency : 200kHz to 900kHz
Dimming Mode : PWM, DC, Mixed-Mode
Built-in Input UVP, Output OVP, OCP, and Soft-Start
Support LED Hot-plug, Open/Short Detection
Low EMI, Low Acoustic Noise
16-Load WDFN Package
RoHS Compliant and Halogen Free
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