{"id":32308,"date":"2026-05-25T09:00:00","date_gmt":"2026-05-25T08:00:00","guid":{"rendered":"https:\/\/www.engineernewsnetwork.com\/blog\/?p=32308"},"modified":"2026-05-20T16:51:31","modified_gmt":"2026-05-20T15:51:31","slug":"high-sensitivity-hall-effect-latch-enhances-position-sensing-in-automotive-motor-control-systems","status":"publish","type":"post","link":"https:\/\/www.engineernewsnetwork.com\/blog\/high-sensitivity-hall-effect-latch-enhances-position-sensing-in-automotive-motor-control-systems\/","title":{"rendered":"High-sensitivity Hall effect latch enhances position sensing in automotive motor control systems"},"content":{"rendered":"\n

Diodes Incorporated expands its AH371xQ series of automotive-compliant* Hall effect latches for motor control applications that need to operate at very low magnetic thresholds and bipolar switching behaviors. Featuring a proprietary Hall plate design, the\u00a0AH3711Q<\/strong><\/a>\u00a0is used for brushless DC (BLDC) motor control, valve operation, linear and incremental rotary encoders, and position-sensing functions. Vehicle applications include window power-lift and sunroof movement, tailgate opening\/closing mechanisms, seat adjustment motors, cooling fans, water\/oil pumps, and speed measurement.<\/p>\n\n\n\n

The magnetic operate (BOP<\/sub>) and release (BRP<\/sub>) points over the AH3711Q, which covers \u00b110 Gauss, delivers greater placement flexibility. This ultra-high sensitivity enables it to detect weaker magnetic fields, allowing the use of smaller, more cost-effective magnets to reduce system size and the total bill-of-materials (BOM) cost. The greater magnetic margin also enables aggressive duty-cycle reduction, lowering power consumption and extending battery life.<\/p>\n\n\n\n

To enhance system reliability, the Hall effect latch operates over a 3V to 27V range. The device has a reverse blocking diode with a Zener clamp on the supply, and the output has an overcurrent limit and a Zener clamp. This combination of components provides protection against 40V load dumps, reverse polarity, and short circuits. The wide input voltage range, coupled with a high 8kV HBM and 1kV CDM ESD rating, further enhances the device’s robustness in harsh environments.<\/p>\n\n\n\n

The device also features a chopper-stabilized design, which minimises switch-point drift across the full -40\u00b0C to +150\u00b0C temperature range and provides high resistance to physical stress during PCB assembly. This mitigates the effects of thermal variation and enhances stray-field immunity. The power-on time is typically 13\u00b5s, which helps avoid system-level faults. Open-drain outputs offer greater external pull-up flexibility for voltages above or below the supply voltage.<\/p>\n\n\n\n

The magnetic operating and release polarity is opposite for the SOT23 (Type S) and SC59 packages. For operation, the SOT23 (Type S) and SIP-3 (Bulk Pack) packages require the south pole to the part-marking side, and the SC59 requires the south pole to the non-part-marking side.<\/p>\n","protected":false},"excerpt":{"rendered":"

Diodes Incorporated expands its AH371xQ series of automotive-compliant* Hall effect latches for motor control applications that need to operate at very low magnetic thresholds and bipolar switching behaviors. Featuring a proprietary Hall plate design, the\u00a0AH3711Q\u00a0is used for brushless DC (BLDC) motor control, valve operation, linear and incremental rotary encoders, and position-sensing functions. Vehicle applications include …<\/p>\n","protected":false},"author":1,"featured_media":32309,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[104],"tags":[14912,14911,753,4388],"class_list":["post-32308","post","type-post","status-publish","format-standard","has-post-thumbnail","","category-electronics","tag-ah3711q","tag-ah371xq-series-of-automotive-compliant-hall-effect-latches","tag-diodes-incorporated","tag-motor-control"],"yoast_head":"\nHigh-sensitivity Hall effect latch enhances position sensing in automotive motor control systems - 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\/high-sensitivity-hall-effect-latch-enhances-position-sensing-in-automotive-motor-control-systems\/\" \/>\n<meta property=\"og:locale\" content=\"en_GB\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"High-sensitivity Hall effect latch enhances position sensing in automotive motor control systems - Engineer News Network\" \/>\n<meta property=\"og:description\" content=\"Diodes Incorporated expands its AH371xQ series of automotive-compliant* Hall effect latches for motor control applications that need to operate at very low magnetic thresholds and bipolar switching behaviors. 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