2 Complete LED Headlamp With Matrix

Modular solution: enables scalable headlight architecture with adaptive functionality

Adaptive headlights, or headlight systems that actively respond to changes in the car or environment with an array of LEDs, often require a dual-stage power conversion architecture followed by a matrix manager. The most common dual-stage power conversion approach consists of a boost voltage regulator stage that converts a car battery’s input voltage variation followed by a buck LED driver to ensure consistent regulation of the output at all times. TI offers a portfolio of devices uniquely designed for this purpose, including boost voltage pre-regulators with fault handling and spread spectrum EMI features (TPS92982-Q1) and dual buck current regulators that combine closed loop accuracy with fast transient response to handle dynamic LED loads and to enabled advanced dimming capabilities (TPS92520-Q1).

To further achieve distinctive adaptive functions, matrix manager devices provide pixel-level control of each individual LED to create optimal roadway illumination. TI was one of the first to develop matrix managers to enable cutting-edge features like sequential turn-signals and adaptive front lighting, and continues to lead the market in innovation with the development of more efficient and more robust devices. The TPS92662A-Q1 and TPS92663A-Q1 are compact, scalable solutions for shunt FET dimming arrays of high-brightness LEDs that can independently power up to 12 or six switches respectively. Running on a universal-asynchronous-receiver/transmitter (UART) protocol, TI’s matrix manager devices are easily compatible with most ECU platform systems.

Figure 2-1 LED Driver Products