Diodes has introduced the AL3069Q, an automotive-compliant, high-efficiency 60V boost controller designed for LED backlighting. It features four 80V high-precision current sink channels to support larger display panels, along with integrated diagnostic functions to enhance system safety and reliability. Target applications include infotainment displays, instrument clusters and head-up displays.
With built-in adaptive boost voltage control, the AL3069Q operates over a wide input voltage range from 4.5V to 60V. This covers the common automotive power supply rails (12V, 24V and 48V), providing greater flexibility in system design. Its boost operating switching frequency is adjustable from 100kHz to 1MHz to address various application requirements toward high-efficiency or compact PCB layouts.
The four integrated 80V LED current sink channels can be set using an external resistor with a current matching of ±0.5% (typ.) between channels and devices, ensuring display uniformity and consistent brightness. Each string can deliver 250mA, with a pulse current of up to 400mA, supporting a longer string of LEDs for higher output power. This capability makes the device suitable for differently sized and larger LED panels up to 32in diagonal. The AL3069Q supports PWM-to-analog dimming, achieving a minimum duty cycle of 1/5000 at 100Hz, enhancing brightness control precision and reducing LED color shift.
Designed with system robustness in mind for automotive applications, it incorporates extensive fault diagnostics and robust protection features. These include cycle-by-cycle current limit, soft-start, undervoltage lockout (UVLO), programmable overvoltage protection (OVP), overtemperature protection (OTP), LED-open/short protection, Schottky diode-short and open protection, inductor-short-circuit protection and VOUT-short protection. A dedicated fault indicator (FAULTB) pin is also included to report faulty conditions.
In related news, Harman announces industry-first automotive certification for Ready Display technology
