{"id":28790,"date":"2025-01-01T10:51:59","date_gmt":"2025-01-01T10:51:59","guid":{"rendered":"https:\/\/www.engineernewsnetwork.com\/blog\/?p=28790"},"modified":"2025-01-01T10:52:50","modified_gmt":"2025-01-01T10:52:50","slug":"85v-automotive-compliant-led-driver-supports-multiple-topologies-with-fault-reporting","status":"publish","type":"post","link":"https:\/\/www.engineernewsnetwork.com\/blog\/85v-automotive-compliant-led-driver-supports-multiple-topologies-with-fault-reporting\/","title":{"rendered":"85V automotive-compliant LED driver supports multiple topologies with fault reporting"},"content":{"rendered":"\n

Diodes Incorporated announces the expansion of its automotive-compliant LED driver portfolio by introducing the AL8866Q<\/a><\/strong>. This DC-switching LED driver-controller drives an external MOSFET and supports buck, boost, buck-boost, and single-ended primary-inductance converter (SEPIC) topologies for high-power LED lighting systems. Applications include daytime running lights (DRL), high\/low beams, fog lights, turn lights, brake\/stop lights, and more.<\/p>\n\n\n\n

It operates within a wide input power supply range from 4.7V to 85V, covering the common 12V, 24V, and 48V battery power rails. This flexibility and multi-mode operation enables lighting designers to standardise on a single component type, streamlining inventory and simplifying design processes.<\/p>\n\n\n\n

The AL8866Q has a fixed-frequency (400kHz) peak current-mode control architecture. It incorporates a spread spectrum frequency modulation technique to enhance EMI performance, which is compliant with the most stringent CISPR 25 Class 5 standard.<\/p>\n\n\n\n

The device supports analog and PWM dimming of the LED current via its DIM pin and has a 1% reference tolerance, enabling better brightness control and matching between lamps. With an over 100:1 analog dimming range, it achieves \u00b112% output current accuracy at low (20%) analog dimming levels, making it more precise than similar LED drivers available. Alternatively, PWM dimming (0.1 to 1kHz) achieves a 100:1 dynamic range.<\/p>\n\n\n\n

The AL8866Q integrates a soft-start function, gradually increasing the inductor and switch current to minimise potential overvoltage and overcurrent at the output. It features an open-drain fault output to indicate various fault conditions, which include LED output-overvoltage, LED output-open\/-short, cycle-by-cycle overcurrent protection, sense-resistor and shorted-inductor\/-diode detection, diode-open circuit, and thermal shutdown.<\/p>\n","protected":false},"excerpt":{"rendered":"

Diodes Incorporated announces the expansion of its automotive-compliant LED driver portfolio by introducing the AL8866Q. This DC-switching LED driver-controller drives an external MOSFET and supports buck, boost, buck-boost, and single-ended primary-inductance converter (SEPIC) topologies for high-power LED lighting systems. Applications include daytime running lights (DRL), high\/low beams, fog lights, turn lights, brake\/stop lights, and more. …<\/p>\n","protected":false},"author":1,"featured_media":28791,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[104],"tags":[13345,753],"class_list":["post-28790","post","type-post","status-publish","format-standard","has-post-thumbnail","","category-electronics","tag-al8866q","tag-diodes-incorporated"],"yoast_head":"\n85V automotive-compliant LED driver supports multiple topologies with fault reporting - Engineer News Network<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.engineernewsnetwork.com\/blog\/85v-automotive-compliant-led-driver-supports-multiple-topologies-with-fault-reporting\/\" \/>\n<meta property=\"og:locale\" content=\"en_GB\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"85V automotive-compliant LED driver supports multiple topologies with fault reporting - Engineer News Network\" \/>\n<meta property=\"og:description\" content=\"Diodes Incorporated announces the expansion of its automotive-compliant LED driver portfolio by introducing the AL8866Q. This DC-switching LED driver-controller drives an external MOSFET and supports buck, boost, buck-boost, and single-ended primary-inductance converter (SEPIC) topologies for high-power LED lighting systems. 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