{"id":28779,"date":"2024-12-24T09:15:00","date_gmt":"2024-12-24T09:15:00","guid":{"rendered":"https:\/\/www.engineernewsnetwork.com\/blog\/?p=28779"},"modified":"2024-12-17T10:07:05","modified_gmt":"2024-12-17T10:07:05","slug":"65v-2a-automotive-compliant-synchronous-buck-led-driver-for-lighting-applications","status":"publish","type":"post","link":"https:\/\/www.engineernewsnetwork.com\/blog\/65v-2a-automotive-compliant-synchronous-buck-led-driver-for-lighting-applications\/","title":{"rendered":"65V, 2A automotive-compliant synchronous Buck LED driver for lighting applications"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">Diodes Incorporated announces the expansion of its automotive-compliant* LED driver portfolio by introducing the <strong><a href=\"https:\/\/www.diodes.com\/part\/AL8891Q\">AL8891Q<\/a><\/strong>. This synchronous Buck LED driver with high-side current sense drives up to 2A from a wide 4.5V to 65V input voltage range. It supports up to 95% duty cycle, allowing the drive of longer LED chains. The device provides a flexible, high-efficiency solution for automotive lighting applications, including daytime running lights (DRL), fog lights, turn lights, brake\/stop lights, and interior lights.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Using constant-on-time (COT) control, the AL8891Q achieves simple control-loop compensation and cycle-by-cycle current limiting with a fast transient response without requiring an external compensation capacitor. The device&#8217;s switching frequency is adjustable from 200kHz to 2.5MHz, allowing it to optimise efficiency or achieve a smaller inductor size and compact form factor. It incorporates a spread spectrum frequency modulation technique to enhance EMI performance, which eases compliance with the most stringent CISPR 25 Class 5 standard.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The AL8891Q has two independent pins \u2013 PWM and analogue dimming \u2013 for enhanced functionality. PWM dimming, from 0.1kHz to 2kHz, is suitable for high-resolution dimming, and analogue dimming is from 0.15V to 2V. It features an internal soft-start function, gradually increasing the inductor and switch current to minimise potential overvoltage and overcurrent at the output.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The device features comprehensive protections with fault reporting, including thermal shutdown with auto-restart, input and constant current undervoltage lockout (UVLO), cycle-by-cycle current limit, and LED-open and short circuit protection to help increase system robustness.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Automotive-compliant \u2013 qualified to AEC-Q100 Grade 1, manufactured in facilities certified to IATF 16949, supporting PPAP documents.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Diodes Incorporated announces the expansion of its automotive-compliant* LED driver portfolio by introducing the AL8891Q. This synchronous Buck LED driver with high-side current sense drives up to 2A from a wide 4.5V to 65V input voltage range. It supports up to 95% duty cycle, allowing the drive of longer LED chains. The device provides a &hellip;<\/p>\n","protected":false},"author":1,"featured_media":28780,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[104],"tags":[13342,753,500,13341],"class_list":["post-28779","post","type-post","status-publish","format-standard","has-post-thumbnail","","category-electronics","tag-al8891q","tag-diodes-incorporated","tag-lighting","tag-synchronous-buck-led-driver"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>65V, 2A automotive-compliant synchronous Buck LED driver for lighting applications - 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\/65v-2a-automotive-compliant-synchronous-buck-led-driver-for-lighting-applications\/\" \/>\n<meta property=\"og:locale\" content=\"en_GB\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"65V, 2A automotive-compliant synchronous Buck LED driver for lighting applications - Engineer News Network\" \/>\n<meta property=\"og:description\" content=\"Diodes Incorporated announces the expansion of its automotive-compliant* LED driver portfolio by introducing the AL8891Q. This synchronous Buck LED driver with high-side current sense drives up to 2A from a wide 4.5V to 65V input voltage range. It supports up to 95% duty cycle, allowing the drive of longer LED chains. 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