Six-Channel LED Drivers for Dynamic Automotive Rear Lighting

Lumissil Microsystems, a division of Integrated Silicon Solution, Inc. (ISSI), announced IS32LT3146 and IS32LT3147 LED drivers to further expand its portfolio of automotive lighting solutions.

Both drivers are AEC-Q100 qualified, have wide input voltage range (5V~40V) to tolerate automobile battery voltage supply range and spikes, low headroom voltage and provide 6-channels of adjustable constant current sources along with features to ensure practical and easy integration into Automotive Lighting products.

Thermal shunt circuitry to minimize driver thermal stress, comprehensive fault detection and reporting for added system reliability, current slew rate control to optimize EMI and thermal roll-off to ensure device lifespan reliability.

The IS32LT3146 provides additional logic to turn on output channels in groups of 1, 2, 3 or 6 in one-group-after-another-group sequential mode or all-channels blinking on/off mode. The grouping of multiple output channels enables adaptation for LEDs with higher current demands. The IS32LT3146 was designed for standalone operation where a vehicle’s BCM (Body Control Module) signal powers the device and all functions can be configured via external resistors without the need for a microcontroller host.