LED matrix manager controls 96 high-brightness LEDs

20th October 2014
Nat Bowers

Claimed to be the industry’s first fully integrated high-brightness LED matrix manager IC for adaptive automotive headlight systems, Texas Instruments has announced the TPS92661-Q1. This enables automobile manufacturers to create innovative LED headlamps that vary beam patterns and intensity dynamically for optimum roadway illumination and enhanced driver safety.

Automatically managing the direction and intensity of high and low beams, adaptive headlamp systems are already supplied in premium vehicles and will gain acceptance into mainstream models in the coming years. The TPS92661-Q1 is a scalable solution which includes 12 individually controlled MOSFET switches to steer current through or around the connected LEDs. This individual 10-bit PWM brightness control enables individual pixel-level light adjustment.

The compact solution for shunt FET dimming arrays of high-brightness LEDs integrates a serial communication port for control and diagnostic functions from a master MCU. This allows up to 96 LEDs to be controlled from one device and LED open/short fault diagnostics and reporting alerts in the event of headlamp failures or damage.

In the past, an adaptive headlamp design required considerable board space to house bulky discrete circuits, including multiple transistors, gate drivers and glue logic. The TPS92661-Q1 replaces this complex design and saves up to 73% board space, enabling a completely solid state headlamp system with no moving parts, such as motors or actuators, that can wear out.

Supplied in a 48-pin HTQFP, the TPS92661-Q1 is available now for $3.70 each in 1,000 unit quantities.

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