STMicroelectronics ALED7709 Automotive LED Drivers

发布时间：2023-04-07 11:39
作者：AMEYA360
来源：网络
阅读量：1878

　　STMicroelectronics ALED7709 Automotive LED Drivers are AEC-Q100 Grade1 qualified and combine a boost/SEPIC controller and four low-side constant-current sinkers. The STMicroelectronics ALED7709 is 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.

STMicroelectronics ALED7709 Automotive LED Drivers

　　FEATURES

　　AEC-Q100 Grade1 qualified

　　Operating temperature range -40°C < TJ < 150°C

　　4.5V to 42V operating input voltage range

　　Up to 60V tolerant for load dump @ 24V battery

　　Supports battery cranking events down to 4V supply

　　Simultaneous or exclusive control by PWMI and I2C interface

　　Switching controller section

　　Low shutdown current ISHDN < 15?A

　　Fixed frequency peak current-mode controller

　　Cycle-by-cycle power switch OCP

　　Adjustable (250kHz to 2.2MHz) switching frequency with optional spread spectrum

　　Synchronized boost and SEPIC topologies support

　　Line switch control for standby power saving and inrush current protection

　　Input overvoltage and output short-circuit protection

　　LED strings control section

　　4 x 40V rated constant current outputs

　　Adjustable up to 200mA per channel

　　±2% typ. output current accuracy

　　Mixed PWM and Analog dimming

　　100Hz to 12.8kHz dimming frequency

　　Dimming ratio 10000:1 at 100Hz

　　LED temperature sensor (NTC) management

　　Selectable channels phase-shifting and adjustable Rise/Fall time for reducing EMI

　　Open channel, LED short-circuit detection

　　Two versions are available ALED7709A and ALED7709B

　　APPLICATIONS

　　Automotive lighting and backlighting

　　Cluster/infotainment display

　　Head-Up Display (HUD)

　　Instrument lighting system

　　Ambient light


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