ALED7709ATR

ALED7709ATR is an automotive-grade (AEC-Q100 grade1 qualified) LED driver combining a boost/SEPIC controller and four low-side constant-current sinkers, designed to drive strings of high-brightness LEDs. The switching converter section provides the supply rail for the LED strings, whose value is constantly optimized for maximum efficiency. The boost/SEPIC controller supports the external synchronization and spread spectrum. It can work simultaneously or exclusively in standalone mode (SAM), controlled only by PWMI signal, and in bus-driven mode (BDM) through an I2C serial interface. The brightness of the four LED strings can be controlled either in global or local mode. In global mode, this supports a mixed PWM and analogue dimming to improve the brightness range capability. Typical applications are automotive lighting and backlighting for:cluster/infotainment display, head-up display (HUD), instrument lighting system, ambient light.

• Operating temperature range from -40°C TJ 150°C
• 4.5V to 42V operating input voltage range
• Up to 60V tolerant for load dump at 24V battery, supports battery cranking events down to 4V supply
• Simultaneous or exclusive control by PWMI and I²C interface
• Fixed frequency peak current-mode controller, cycle-by-cycle power switch OCP
• Synchronized boost and SEPIC topologies support, input overvoltage/output short-circuit protection
• 4 x 40V rated constant current outputs, adjustable up to 200mA per channel
• Selectable channels phase-shifting and adjustable rise/fall time for reducing EMI
• QFN24L 0.65mm pitch small package
• 100Hz to 12.8KHz dimming frequency, dimming ratio 10000:1 at 100Hz