STMicroelectronics ALED6000
ALED6000 - Automotive 3A single channel LED driver with integrated DC-DC converter
The ALED6000 is a step down monolithic switching regulator designed to source up to 3 A DC current for high power LED driving. The wide input voltage range makes the ALED6000 the ideal choice for automotive systems. The 250 mV typical RSENSE voltage drop enhances the efficiency performance. Digital dimming is implemented by driving the dedicated DIM pin. The adjustable current limitation, designed to select the inductor RMS current accordingly with the nominal output LEDs current, and the switching frequency adjustability make the size of the application compact. Pulse-by-pulse current sensing, improved by digital frequency scaling, implements an effective constant current protection over the different application conditions. The embedded switch-over feature on the VBIAS pin maximizes the efficiency. Multiple devices can be synchronized sharing the SYNCH pin to prevent beating noise in low noise applications and the input current RMS value to be reduced.
Features
- AEC-Q100 grade 1 qualified
- Up to 3 A DC output current
- 4.5 V to 61 V operating input voltage
- RDS(on) = 250 mΩ typ.
- Adjustable fSW (250 kHz - 1.5 MHz)
- Dimming function with dedicated pin
- Low IQ shutdown (10 µA typ. from VIN)
- Low IQ operating (2.4 mA typ.)
- 3.2% 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
STEVAL-ILL089V1 - 1A buck LED driver board based on the ALED6000 automotive-grade dimmable LED driver
The STEVAL-ILL089V1 evaluation board is based on the ALED6000 monolithic current source for high power LED driving. Digital dimming is implemented by driving the dedicated DIM pin. Low drop-out operation with almost 100% duty cycle can be achieved. The ALED6000 is a 61 V asynchronous switching regulator with embedded Power MOSFET, designed to source up to 3 ADC current depending on the application conditions. The 250 mV typical RSENSE voltage drop, the embedded switchover feature on the VBIAS pin and the light load management (pulse skipping) all contribute to maximizing power conversion efficiency across the entire load range.
The current limit threshold and the switching frequency are adjustable for application optimization. The device includes an internal 250 kHz oscillator that can be externally adjusted up to 1.5 MHz. The size of the overall application is minimized thanks to the high switching frequency and its compatibility with ceramic output capacitors. Two LED6000 regulators can be synchronized in a 180° out-of-phase configuration for reduced total input RMS current.
Features
- 4.5 V to 60 V input voltage
- Step-down conversion
- 1 A programmed LED current
- 500 kHz switching frequency
- Digital dimming
- Compliant with ceramic output capacitors
- 180° out of phase synchronization available
- Auto recovery overcurrent and thermal protection
- RoHS and WEEE compliant
silica content library/npi/2022/stmicroelectronics-aled6000
ST ALED6000 Automotive single channel LED driver | Avnet Silica
