High-efficiency automotive LED driver with boost controller

11-02-2015 | Texas Instruments | Power

The Texas Instruments (TI) LP8860-Q1 is an automotive high-efficiency LED driver with boost controller. It has four high-precision current sinks that can be controlled by a PWM input signal, an SPI/I2C master, or both. The boost converter has adaptive output voltage control based on the LED current sinks headroom voltages. This feature minimizes the power consumption by adjusting the voltage to lowest sufficient level in all conditions. Boost controller supports spread spectrum for switching frequency and an external synchronization with dedicated pin. The high switching frequency allows the LP8860-Q1 to avoid disturbance for AM radio band. The device supports built-in Hybrid PWM and current dimming which reduces EMI, extends the LED lifetime, and increases the total optical efficiency. Phase Shift PWM allows reduced audible noise and smaller boost output capacitors. Also, the LP8860-Q1 can drive an external power line FET. To support automotive stop / start conditions, the input voltage range for the LP8860-Q1 is 3V to 48V. The device also integrates extensive safety and protection features.

By Electropages Admin