The LP8555 is a high efficiency LED driver with integrated dual DC-DC boost converters.
It has 12 high-precision current sinks that can be controlled by a PWM input signal, an
I2C master, or both.
Dual-boost configuration of LP8555 shares the load to two inductors and allows thinner
overall solution size and better efficiency compared to single-boost solutions. 12 LED strings
allows driving high number of LEDs with optimal efficiency since boost conversion ratio can be kept
The boost converter has adaptive output voltage control based on the LED current sink
headroom voltages. This feature minimizes the power consumption by adjusting the voltage to lowest
sufficient level in all conditions.
The LED string auto-detect function enables use of the same device in systems with 2 to
12 LED strings for the maximum design flexibility. Proprietary Hybrid PWM and Current dimming mode
enables additional system power savings. Phase-shift PWM allows reduced audible noise and smaller
boost output capacitors. Flexible CABC support combines brightness level selections based on the
PWM input and I2C commands.
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