IS32LT3168 LED Driver with Integrated Hall Sensor

Lumissil's IS32LT3168 is an LED driver with an integrated Hall effect sensor to further expand its portfolio of automotive lighting solutions. The IS32LT3168 is a standalone single-channel linear LED driver in a small SOP-8 package that can be fully configured via resistors to eliminate the need for a processor and additional software. It provides a single-channel adjustable constant current source output with PWM dimming control or automatic Gamma-corrected LED luminosity fading control. It also has an integrated omnipolar Hall effect sensor that can be used to switch itself or other drivers on/off, making it suitable for automotive or industrial lighting where a magnet could be used to control LED lights.

The IS32LT3168 operates over a wide input voltage range (6.5 V to 28 V; 36 V maximum) and can withstand a 40 V load dump. The device also integrates a low-power and high-sensitivity unipolar Hall effect switch to facilitate the use of contactless control of the LEDs. The Hall effect switch operates with either a north or a south magnetic pole to facilitate different user requirements. For system reliability, it can detect channel output pin or current setting pin short-to-ground faults and perform thermal shutdown or roll-off should the temperature exceed an acceptable threshold to ensure device lifespan. It is AEC-Q100 qualified meeting the stringent automotive quality requirements but can also meet the extended temperature range for the industrial market.

The Hall effect sensor can be activated in the presence or removal of a magnet. This polarity can be configured by floating or grounding an input control pin. The Hall sensor output can be optionally used as input to enable or disable the driver’s channel output or as control to other drivers or on board control circuits. The IS32LT3168 channel output can be configured for gamma-corrected fading such that the LED luminosity appears linear to human eyes.