STMicroelectronics has developed the ALED6000, a step-down monolithic switching regulator specifically designed for high power LED driving applications. This regulator is capable of sourcing up to 3 ADC current, providing ample power for demanding LED lighting systems.
One of the standout features of the ALED6000 is its wide input voltage range, which makes it suitable for use in automotive systems where voltage fluctuations are common. This versatility ensures that the regulator can deliver stable and reliable power to the LEDs regardless of the input voltage conditions.
To enhance efficiency performance, the ALED6000 incorporates a 250 mV typical RSENSE voltage drop. This low voltage drop minimizes power losses and allows for more efficient LED driving.
The ALED6000 also offers digital dimming capabilities through its dedicated DIM pin. This feature enables precise control over the LED brightness, allowing for dynamic lighting effects and energy savings. By adjusting the duty cycle of the DIM signal, users can easily achieve the desired light output.
Furthermore, the ALED6000 provides adjustable current limitation, allowing designers to select the inductor RMS current according to the nominal output LED's current. This flexibility ensures optimal performance and protection for the LEDs, preventing excessive current flow that could lead to damage.
Additionally, the switching frequency of the ALED6000 is adjustable, enabling designers to optimize the size of the overall application. By selecting the appropriate switching frequency, the size of the inductor and other passive components can be minimized, resulting in a more compact design.
In conclusion, STMicroelectronics' ALED6000 is a highly capable step-down monolithic switching regulator designed for high power LED driving. Its wide input voltage range, digital dimming capabilities, adjustable current limitation, and switching frequency adjustability make it an ideal choice for automotive systems and other applications where efficient and precise LED lighting is required.
AECQ100 qualification
Up to 3 ADC output current
4.5 V to 61 V operating input voltage
RDS(ON) = 250 mΩ typ.
Adjustable fSW (250 kHz to 1.5 MHz)
Dimming function with dedicated pin
Low IQ shutdown (10 µA typ. from VIN)
Low IQ operating (2.4 mA typ.)
±3% output current accuracy
Synchronization
Enable with dedicated pin
Adjustable soft-start time
Adjustable current limitation
Low-dropout operation (12 μs max.)
VBIAS improves efficiency at light load
Auto recovery thermal shutdown
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