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.


| 产品属性 | 属性值 |
|---|---|
| 通道数 | 12 |
| 每通道LED电流(mA) | 35 |
| 领导的配置 | Parallel |
| 程序内存 | No |
| 拓扑结构 | Current Sink |
| 可编程斜坡控制 | No |
| Vin (min) (V) | 2.7 |
| Vin (max) (V) | 5.5 |
| 输出(最大)(A) | 0.035 |
| 特性 | I2C control |
| 智商(类型)(mA) | 0.01 |
| 关断电流(ISD) (type)(µA) | 1 |
| 工作温度范围(℃) | -40 to 85 |
| 评级 | Catalog |
