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智能家居和其他采用人机交互的应用都需要高性能 RGB LED 驱动器。LED 动画效果（如闪烁、呼吸以及追逐）可极大地改善用户体验，同时最大限度地降低系统噪声也至关重要。

LP50xx 器件是一款 9/12 通道恒定电流阱 LED 驱动器。LP50xx 器件包含集成式色彩混合和亮度控制，并且预配置特性可简化软件编码过程。为每个通道配备的集成式 12 位、29kHz PWM 发生器可使 LED 色彩流畅、生动，并消除可闻噪声。

The LP50xx device controls each LED output with a 12-bit PWM resolution at 29-kHz switching frequency, which helps achieve a smooth dimming effect and eliminates audible noise. The independent color mixing and intensity control registers make the software coding straightforward. When targeting a fade-in, fade-out type breathing effect, the global R, G, B bank control reduces the microcontroller loading significantly. The LP50xx device also implements a PWM phase-shifting function to help reduce the input power budget when LEDs turn on simultaneously.

The LP50xx device implements an automatic power-saving mode to achieve ultra-low quiescent current. When channels are all off for 30 ms, the device total power consumption is down to 10 µA, which makes the LP50xx device a potential choice for battery-powered end equipment.