The STMicroelectronics ALED7709 Automotive LED driver is AEC-Q100 Level 1 certified and incorporates a boost /SEPIC controller and four low-side constant-current sinktubes. The stmicroelectronics ALED7709 is designed to drive a string of high brightness leds. The switch converter section provides the power track for the LED string, whose value is constantly optimized for maximum efficiency. boost/SEPIC controllers support external synchronization and spread spectrum.

 

● AEC-Q100 Level 1 qualified
-   Operating temperature range -40°C ＜ TJ ＜ 150 ° c.
● 4.5V to 42V working input voltage range
-   Up to 60V load dumps tolerate @24V batteries
-   Support battery startup events as low as 4V supply
● PWMI and I2C interface synchronization or exclusive control
● Switch controller section
-   Low shutdown current ISHDN ＜15 (including
-   Fixed frequency peak current mode controller
-   Periodic power switch OCP
-   Adjustable switching frequency (250kHz to 2.2MHz) with optional spread spectrum
-   Support for synchronous enhancement and SEPIC topology
-   Line switch control, backup power saving and inrush current protection
-   Input overvoltage and output short circuit protection
● LED string control section
-   4 x 40V rated constant current output
-   Adjustable up to 200mA per channel
-   Typ±2%. Output current accuracy
-   Hybrid PWM and analog dimming
-   100Hz to 12.8kHz dimming frequency
-   Dimming ratio 10000:1 100Hz
-   LED temperature sensor (NTC) management
-   Optional channel phase shift and adjustable rise/fall time to reduce EMI
-   Open circuit, LED short circuit detection
-   Two versions of ALED7709A and ALED7709B are available

 

● Car lighting and backlighting
-   Cluster/entertainment display
-   Head-up display (HUD)
-   Instrument lighting system
-   Ambient light