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A1569E

Allegro
Part Number A1569E
Manufacturer Allegro
Description LED Driver
Published Sep 19, 2016
Detailed Description A1569E LED Driver with Integrated Hall-Effect Switch FEATURES AND BENEFITS • Linear LED drive current ≤150 mA set by a...
Datasheet PDF File A1569E PDF File

A1569E
A1569E

Overview
A1569E LED Driver with Integrated Hall-Effect Switch FEATURES AND BENEFITS • 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) • 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 85ºC ambient temperature range • Small 8-pin SOIC package with thermal pad PACKAGE: 8-Pin SOICN with Exposed Thermal Pad (Suffix LJ) DESCRIPTION The A1569E is a highly integrated solution that combines a Hall-effect switch with a linear, programmable current regulator, 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 A1569E 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 adjustable fade-in/fade-out effect.
Omnipolar operation (either north or south pole) and high magnetic sensitivity make the A1569E tolerant of large air gaps and mechanical misalignment.
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 temper...


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