RT6033A PDF – 4-Ch, Constant Current LED Driver – Richtek

Part Number: RT6033A

Function: 4-Channel, Constant Current LED Driver

Package: SOP 16 Pin Type

Manufacturer: Richtek



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The RT6033A is a 4-CH constant current sink LED drivers with Dynamic Headroom Control (DHC) function. RT6033A can provide well current matching ability, adjustable VSET to choose the suitable dropout voltage across the MOS / BTJ. Beside that, DHC will provide the stable VFB dimming, thus voltage ripple is kept as small even during the dimming. The RT6033A provides four channel constant currents with less than 3% differences in output current value among the 4-CH and ICs respectively. The constant current is adjustable by each channel external resistor (RISET). The LED brightness can also be adjusted via the EN/PWM pin with PWM dimming duty from 1% to 100%. The RT6033A can operate with external components for high current application The DHC function generates feedback signal to DC/DC control loop and regulate the output voltage.


1. Wide Input Supply Voltage Range : 5V to 24V
2. Adjustable Channel Current
3. 3% Current Sense Amplifier Input Offset
4. VCC Under Voltage Lockout
5. Thermal Shutdown
6. Adjustable Dynamic Headroom Control (DHC) Function
7. LED Open/Short Protection
8. RoHS Compliant and Halogen Free


1. LCD TV, MNT Display Backlight
2. DC/DC or AC/DC LED Driver Application
3. General Purpose Constant Current Source
4. Architectural and Decorative LED Lighting
5. LED Street Lighting


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RT6033A Datasheet