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A1569KLJTR-T Datasheet(PDF) 1 Page - Allegro MicroSystems |
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A1569KLJTR-T Datasheet(HTML) 1 Page - Allegro MicroSystems |
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1 / 21 page  The A1569K is a highly integrated solution that combines a Hall-effectswitchwithalinear,programmablecurrentregulator, providing up to 150 mA to drive one or more LEDs. With the addition of only two passive components and one or more LEDs, the A1569K forms a complete, magnetically actuated lighting solution that is small, flexible, elegant, easy to design, rugged, and reliable. It is optimized for automotive interior and auxilliary lighting such as map lights, glove boxes, consoles, vanity mirrors, hood/truck/bed lights, etc. The LED drive current is set by an external resistor; the LED is then activated by the built-in Hall-effect switch and features an adjustablefade-in/fade-outeffect.Omnipolaroperation(either north or south pole) and high magnetic sensitivity make the A1569Ktolerantoflargeairgapsandmechanicalmisalignment. System assembly is easier, as the magnet can be oriented with either pole facing the device. Chopper stabilization provides low switchpoint drift over the operating temperature range. The driver can also be activated via an external input for direct control of the LED. In addition to contactless operation and safe, constant-current LED drive, reliability is further enhanced with reverse-battery protection, thermal foldback, and automatic shutdown for thermaloverloadandshortstoground.TheA1569Kwillprevent damage to the system by removing LED drive current until the short is removed and/or the chip temperature has reduced below the thermal threshold. The driver output is slew-rate- limited to reduce electrical noise during operation. A1569K-DS • Linear LED drive current ≤150 mA set by an external reference resistor • High sensitivity, omnipolar Hall-effect switch for LED on/off control • Low component count for small size and ease of design • Elegant fade-in/fade-out effects with adjustable duration (optional) • Qualified per AEC-Q100 for automotive applications • Low dropout voltage and low supply current • Chopper-stabilized Hall switch □ Low switchpoint drift over temperature □ Insensitivity to physical stress • Input pin for external LED driver control • Slew-rate-limited LED output drive for current transient suppression • Ruggedness and reliability □ Integrated voltage regulator for operation from 7 to 24 V □ Reverse-battery protection □ Automatic short-circuit and thermal overload protection and recovery □ –40ºC to 125ºC ambient temperature range • Small 8-pin SOIC package with thermal pad Automotive LED Driver with Integrated Hall-Effect Switch PACKAGE: 8-Pin SOICN with Exposed Thermal Pad (Suffix LJ) Typical Application Diagram A1569K FEATURES AND BENEFITS DESCRIPTION Not to scale VIN SEN_EN LA EXT HALL IREF RIREF CFADE (optional) THTH FADE GND 150 mA +V No Connect or Connect to GND LED_ON Optional Control Signals From MCU or Remote Switch SLEEP For standalone operation, SEN_EN is pulled high (e.g., tied to VIN) CBYPASS Continued on the next page… |
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Similar Description - A1569KLJTR-T |
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