LTC3205

所属类别：控制器controller
产品名称：多显示屏 LED 控制器
厂商：LT
生产批号：11+
封装：QFN
库存状态：有库存
库存量：2000
最低订购量：1
详细资料：

Product Introduction

LTC3205 multi-display LED controller

peculiarity

用于实现高达 92% 效率的升压/ 降压型分数充电泵
可对具 1-4 个 LED 的主显示屏、1-2 个 LED 的副显示屏以及 RGB LED 显示屏进行独立的电流和调光控制
可采用三线式串行接口来设置 LED 电流
高达 250mA 的连续 LED 电流
LED 电流匹配精度达 ±0.7%
低噪声恒定频率操作*
组件数目最少
自动软启动可限制浪涌电流
用于主和副显示屏的四种可设置调光状态
可为 RGB 显示提供多达 4096 种色彩组合
低停机电流：I_CC
纤巧型 24 引脚 (4mm x 4mm) QFN 封

description

The LTC®3205 is a highly integrated, multi-display LED controller. The device includes a high-efficiency, low-noise fraction boost/buck charging pump to power the primary and secondary white LED displays and an RGB color LED display. LTC3205 Only 4 small ceramic capacitors and two resistors are needed to form a complete triple-screen LED power supply and current controller.

The maximum current of the primary/secondary displays as well as the RGB displays is set individually by a resistor. The current of each LED is controlled by an internal current source. Dimming and ON/OFF control of all displays is done via a three-wire serial interface. The main and secondary displays have four dimming states, while the red, green, and blue LEDs have 16 dimming states via internal PWM, enabling up to 4096 color combinations.

LTC3205's charging pumps optimize efficiency based on VIN and LED forward voltage conditions. The device is powered on in buck mode and automatically transitions to boost mode as soon as any enabled LED current source begins to enter a voltage drop state. The internal circuitry protects against inrush current and excessive input noise during start-up and mode changeover.

LTC3205 is available in a flat 24-pin (4mm×4mm x 0.8mm) QFN package.

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