APS13568: LED Driver with Integrated Micropower Hall-Effect Switch


The APS13568 is an integrated circuit that combines an ultrasensitive, omnipolar, micropower Hall-effect switch with a linear programmable current regulator providing up to 150 mA to drive high brightness LEDs. The omnipolar Hall-effect switch provides contactless control of the regulated LED current, which is set by a single reference resistor. This highly integrated solution offers high reliability and ease of design compared to a discrete solution.

The Hall-effect switch operates with either a north or a south magnetic pole. The switch output polarity can be set with an external pulldown on the POL input pin. This allows the user to select whether the APS13568 switch output goes low when a
magnet is present or when the magnetic field is removed. Chopper stabilization provides low switchpoint drift over temperature.

The LED is turned on when the EN input goes low. This active low input can be connected directly to the Hall switch output, SO, to turn the LED on when the switch output goes low. This flexible solution allows the user to connect additional slave
switches, LED drivers, PWM, or microprocessor inputs to control when the LED is on. Optionally, an external capacitor can be used to adjust the fade-in/fade-out feature.

On-board protection for shorts to ground and thermal overload prevents damage to the APS13568 and LED string by limiting the regulated current until the short is removed and/or the chip temperature has reduced below the thermal threshold.

The device is packaged in an 8-pin SOICN (LJ) with an exposed pad for enhanced thermal dissipation. It is RoHS-compliant, with100% matte-tin leadframe plating.

The APS13568 is available in an “E” temperature version (up to 85°C) for industrial and consumer applications, as well as a “K” temperature version (up to 125°C) that is qualified per AEC-Q100 for automotive applications.

Top Features

  • Micropower (25 μA, typical) when LED is off
  • Linear LED drive up to 150 mA
  • Omnipolar Hall-effect switch
    • Low drift over temperature
    • Solid-state reliability
    • Insensitive to physical stress
  • External LED-enable pin for direct on/off control
  • Hall-effect switch output
    • Supports secondary switches and/or LED drivers
    • Provides switch state for other functions
    • Selectable output polarity
  • Automotive-grade ruggedness and fault-tolerance
    • “K” temperature range qualified per AEC-Q100
    • Reverse-battery and load-dump protection
    • Short-circuit protection
    • Thermal protection
  • Internal protection circuits enable 40 V load dump compliance without external protection components

Typical Applications

  • Automotive glove boxes and storage
  • Automotive vanity mirrors
  • Task lighting
  • Consumer electronics

Part Number Specifications and Availability

Part Number Package Type Temperature RoHS
Part Composition /
RoHS Data
Comments Samples Check Stock
APS13568ELJATR 8-lead SOIC -40°C to 85°C Yes View Data Contact your
local sales rep
Distributor Stock
APS13568KLJATR 8-lead SOIC -40°C to 125°C Yes View Data Contact your
local sales rep
Distributor Stock
ASEK13568KLJA DEMO BOARD -40°C to 125°C No -- Contact your
local sales rep
Distributor Stock

Allegro’s products are not to be used in any devices or systems, including but not limited to life support devices or systems, in which a failure of Allegro’s product can reasonably be expected to cause bodily harm.

Allegro LJ SOIC with exposed pad 8-pin package


8-pin SOICN (LJ)

Application Notes

General Application Using The APS13568 (PDF)