Led Driver

STMicroelectronics has made an eight-channel low-side driver for vehicles with extra functional safety hardware that “eases system-level ISO 26262 certification up to ASIL-B”, said the company. The nominal ratings of L9800, as it will be known, are: 12V power rail and 260mA per output. L9800 outputs can drive resistive, capacitive or inductive loads like relays, solenoids and LEDs,” said ST. ...

Lumissil Microsystems is aiming at adaptive beam vehicle headlights with controller for dozens of power LEDs. It is for ‘matrix’ headlights, that have an array of close-packed power LEDs and projection optics that focus that any pattern on the array forwards from the vehicle – allowing headlights to produce arbitrary beam patterns – usually controlled by an on-board forward facing ...

Lumissil Microsystems has introduce a speciallist RISC-V microcontroller for touch-controlled LED-based user interfaces, with optional sound feedback. There are two versions: IS31CS9310 for industrial use and AEC-Q100 grade-1 qualified IS32CS9310 for automotive use. An 8 x 12 LED matrix driver is the primary peripheral, with eight PMOS switches and 12 built-in 80mA PWM-controlled current sinks, that allow each LED to ...

Lumissil Microsystems has created a pair of LED drivers that include a 32MHz 8051 microcontroller. “These new controllers enable lighting engineers to create customised dynamic LED lighting animations tailored to their system requirements,” according to the company. “They feature integrated non-volatile memory to store animation sequences and LED parameters, essential for dynamic lighting effects such as colour transitions, pulsing, fading ...

Novosense Microelectronics announced a 24 channel automotive LED driver at PCIM in Nuremberg today. NSL21924 is a high-side driver, aimed at rear lights, exterior lights and general automotive interior and body lighting. 16 channel NSL21916 is also available. Qualification is to AEC-Q100 Grade 1 (Tj = -40 to +150°C). The LED supply voltage can be across 3 to 16V, and ...

Diodes has is aiming at automotive LED strings with a boost and SEPIC (single-ended primary-inductance converter) controller, that can also be wired as a voltage regulator. Called AL8853AQ, it is qualified to AEC-Q100 and implements current-mode and fixed-frequency (400khz) PWM control. Slope-compensation is included to prevent sub-harmonic oscillation at duty cycles >50%. The IC requires an external n-channel power switching ...

Infineon Technologies has introduced a first-look design tool for LCC power converters. “Power factor correction plus LCC resonant topology for constant current output has proven to offer outstanding efficiency combined with a large output voltage range in high-power LED lighting applications,” according to the company. The “topology is 5 to 6% more efficient than other commonly used two-stage topologies. However, ...

STMicroelectronics has used the ‘CAN FD Light’ protocol in a 32-channel automotive lighting controller. “With 32 regulated current sources, independently programmable from 1mA to 15mA, L99LDLH32 can drive individual pixels in external and interior lighting applications. Global dimming is also provided, with 8-bit resolution,” according to the company, whose data sheet said that it is particularly aimed at external rear ...

Allegro MicroSystems has added two LED drivers to its automotive portfolio. A80803 is a boost and buck-boost dc-dc converter for headlights, that includes switching for high-beam and dip-beam strings. It works with inputs over 5 to 37 V (40V abs max for load dump, 4.5V under-voltage lock-out). Output can be up to 70V Drivers are included for external high and low-side dc-dc mosfets ...

Nexperia has brought out a range of LED drivers in the DFN2020D-6 (SOT1118D) package. This case style features side-wettable flanks (SWF) which facilitate the use of AOI (automated optical inspection), and improve reliability. This is the first time LED drivers have been available in this package. The leadless devices join Nexperia’s wide range of LED drivers in leaded packages offering ...