40-V-rated LED drivers for vehicle dashboards generate low EMI levels

May 28, 2013 // By Christoph Hammerschmidt
Texas Instruments has introduced a new generation of AEC-Q100 qualified automotive LED drivers for dashboard and interior illumination applications. They feature high voltage rating, thermal shutdown protection and optimised electromagnetic compatibility (EMC) performance.

The TLC6C598-Q1 and TLC6C5912-Q1 are monolithic, medium-voltage, low-current 8-bit/12-bit shift registers designed for use in systems that require relatively moderate load power, such as LEDs. The TLC6C598-Q1 and TLC6C5912-Q1 are designed for automotive dashboard applications, including tell-tale warning lamps, instrumentation cluster, and LED illumination and control.

Key features and benefits of the new drivers include a voltage rating of 40V - TI claims it is the highest in the industry. This allows the TLC6C598-Q1 to power up to eight strings of LEDs and the TLC6C5912-Q1 to power up to twelve strings of LEDs directly connected to the automotive battery. The devices offer self-protection against power dissipation, which results in better long-term reliability when low- and high-temperature demands are placed on the device. They also boast an optimized EMC performance in that they have controlled and optimized rise and fall time for the outputs, reducing the electromagnetic emissions.

To ease the task of the developer and to cut time to market, a simulation model as well as a reference design, a schematic checklist, and an application note are available.

The TLC6C598-Q1 comes in two packages: SOIC-D and TSSOP-PW 16-pin, $0.50 (2,500); the TLC6C5912-Q1 also comes in two packages: SOIC and TSSOP 20-pin, $0.70 (2,500).

TI, www.ti.com/automotiveguide-pr.