- 制造厂商：AD
- 产品类别：LED 驱动器 IC
- 技术类目：降压型 LED 驱动器
- 功能描述：16 通道降压模式 LED 驱动器
- （AD代理渠道，提供当日发货、严格的质量标准，满足您的目标价格）
LT3595 是一款高性能 LED 驱动器，专为以高达 50mA 的电流来驱动 16 个各具多达 10 个 LED 的独立通道而设计。LED 的串联连接提供了相等的 LED 电流，因而产生了均匀的亮度。电源开关、肖特基二极管和补偿元件全部内置，从而实现了小巧的转换器占板面积和较低的元件成本。2MHz 的高开关频率允许使用纤巧、扁平的电感器和电容器。一种固定频率、电流模式架构可在一个很宽的电源和输出电压范围内实现稳定的操作。
利用单个外部电阻器即可设定所有 16 个通道的 LED 电流，这样就能够通过对各个 PWM 引脚进行脉宽调制来控制每个通道的调光操作。16 个驱动器之间的相对电流匹配精度为 8%，而 PWM 调光范围为 5000:1。该器件采用 5mm x 9mm x 0.75mm 56 引脚 QFN 封装。
应用
- LED 视频布告板
- LCD 电视
- 运动场和广告显示屏
- 输入电源范围：4.5V 至 45V
- 每个通道高达 50mA 的 LED 电流
- 100mA、45V 内部开关
- 在 20mA 时相对 LED 电流匹配精度为8%
- 16 个独立的 LED 通道
- 5000:1 True Color PWM 调光范围
- LED 在停机模式中被断接
- 内部肖特基二极管
- 低静态电流
- 2MHz 开关频率
- RSET 引脚负责设定主控 LED 电流
- 典型效率：92%
- 开路 LED 检测和热保护
- 56 引脚 5mm x 9mm x 0.75mm QFN 封装
LT3595EUHH#PBF，封装：56-Lead QFN (5mm x 9mm x 0.75mm w/ EP)，包装形式及数量：管装，40，工作温度：-40 to 125C，AD官网报价：8.27（100-499个）；7.01（1000+个）
LT3595EUHH#TRPBF，封装：56-Lead QFN (5mm x 9mm x 0.75mm w/ EP)，包装形式及数量：卷带，2500，工作温度：-40 to 125C，AD官网报价：8.27（100-499个）；7.01（1000+个）
DC1199A：LT3595EUHH Demo Board | 16-Channel Buck Mode LED Driver, 15V ≤ VIN ≤ 45V, VLED up to 12V @ 30mA (x16)
Demonstration circuit 1199A is a 16-Channel Buck Mode LED Driver featuring the LT3595EUHH. The circuit is optimized to drive 16 channels of three series LEDs at 30mA, though the LT3595 is capable of driving up to 10 LEDs at 50mA per channel. Each channel has three series white LEDs and they are stuffed on the PCB. The LT3595features a wide input voltage range, integrated components, externally set LED current, high pwm dimming range, high efficiency, shutdown, open LED protection, and 2MHz switching frequency.
The 100mA, 45V fully integrated switches help drive up to 10 LEDs per channel in series at 50mA each. Internal catch diodes reduce external component count and circuit size. PWM dimming is as high as 1000:1 at 100Hz over the entire input voltage range.
There are three input power terminals: VIN ranges from 15V up to 45V and is used for powering the LEDs, VCC powers the LT3595 and the pwm gates, and µVIN (6-12V) powers the onboard PIC microprocessor. The PIC allows the board to demonstrate some preprogrammed patterns and PWM dimming. Although the range of the LT3595 VCC pin goes down to 3V, 5V is needed for the PWM signal gates to work properly with the PIC.
