LM3644 Dual 1.5-A Current Source Camera Flash LED Driver

1 Features 1• Dual Independent 1.5-A LED Current Source Programmability • Accurate and Programmable LED Current Range from 1.4 mA to 1.5 A • Torch Currents up to 360 mA (LM3644TT) • Flash Timeout Values up to 1.6 seconds (LM3644TT) • Optimized Flash LED Current During Low Battery Conditio

文件：1.04151 Mbytes 页数：42 Pages

TI

德州仪器

Dual 1.5A Current Source Camera Flash LED Driver

文件：1.47914 Mbytes 页数：41 Pages

TI

德州仪器

双 1.5A 电流源摄像头 LED 闪光灯驱动器

LM3644 是一款双 LED 闪存驱动器，能够以较小的解决方案尺寸提供高度可调节性。LM3644 采用 2MHz 或 4MHz 固定频率同步升压转换器为 1.5A 恒流 LED 源供电。 两个 128 级电流源可灵活调整 LED1 与 LED2 之间的电流比，。自适应调节方法可确保电流源保持可调节状态，并且最大限度地提升效率。LM3643 LM3644 的功能由兼容 I2C 的接口控制。这些 功能 包括：硬件闪光灯和硬件手电筒引脚（STROBE 和 TORCH/TEMP）、TX 中断和负温度系数 (NTC) 热敏电阻监视器。器件在每个输出引脚均提供了可独立编程的电流，以便在闪存模式或录像（手 • 两个可独立编程的 1.5A LED 电流源\n• 准确的可编程 LED 电流范围为 1.4mA 到 1.5A\n• 手电筒电流最高可达 360mA (LM3644TT)\n• 闪光灯超时值最长可达 1.6 秒 (LM3644TT)\n• 优化了低电池电量条件下的闪存 LED 电流（输入电压闪存监控器 (IVFM)）\n• 手电筒模式（100mA 时）和闪存模式（1A 至 1.5A 时）的效率超过 85%\n• 支持阴极接地 LED 操作，改进了热管理\n• 小型解决方案尺寸：2\n• 硬件选通使能 (STROBE) \n• 射频功率放大器脉冲事件的同步输入 (TX)\n• 硬件火炬;

TI

德州仪器

LM3644 Dual 1.5-A Current Source Camera Flash LED Driver

1 Features 1• Dual Independent 1.5-A LED Current Source Programmability • Accurate and Programmable LED Current Range from 1.4 mA to 1.5 A • Torch Currents up to 360 mA (LM3644TT) • Flash Timeout Values up to 1.6 seconds (LM3644TT) • Optimized Flash LED Current During Low Battery Conditio

文件：1.04151 Mbytes 页数：42 Pages

TI

德州仪器

丝印：3644TT；Package：DSBGA；LM3644 Dual 1.5-A Current Source Camera Flash LED Driver

1 Features 1• Dual Independent 1.5-A LED Current Source Programmability • Accurate and Programmable LED Current Range from 1.4 mA to 1.5 A • Torch Currents up to 360 mA (LM3644TT) • Flash Timeout Values up to 1.6 seconds (LM3644TT) • Optimized Flash LED Current During Low Battery Conditio

文件：1.04151 Mbytes 页数：42 Pages

TI

德州仪器

丝印：3644TT；Package：DSBGA；LM3644 Dual 1.5-A Current Source Camera Flash LED Driver

1 Features 1• Dual Independent 1.5-A LED Current Source Programmability • Accurate and Programmable LED Current Range from 1.4 mA to 1.5 A • Torch Currents up to 360 mA (LM3644TT) • Flash Timeout Values up to 1.6 seconds (LM3644TT) • Optimized Flash LED Current During Low Battery Conditio

文件：1.04151 Mbytes 页数：42 Pages

TI

德州仪器

丝印：3644；Package：DSBGA；LM3644 Dual 1.5-A Current Source Camera Flash LED Driver

1 Features 1• Dual Independent 1.5-A LED Current Source Programmability • Accurate and Programmable LED Current Range from 1.4 mA to 1.5 A • Torch Currents up to 360 mA (LM3644TT) • Flash Timeout Values up to 1.6 seconds (LM3644TT) • Optimized Flash LED Current During Low Battery Conditio

文件：1.04151 Mbytes 页数：42 Pages

TI

德州仪器

丝印：3644；Package：DSBGA；LM3644 Dual 1.5-A Current Source Camera Flash LED Driver

1 Features 1• Dual Independent 1.5-A LED Current Source Programmability • Accurate and Programmable LED Current Range from 1.4 mA to 1.5 A • Torch Currents up to 360 mA (LM3644TT) • Flash Timeout Values up to 1.6 seconds (LM3644TT) • Optimized Flash LED Current During Low Battery Conditio

文件：1.04151 Mbytes 页数：42 Pages

TI

德州仪器

Dual 1.5A Current Source Camera Flash LED Driver

文件：1.47914 Mbytes 页数：41 Pages

TI

德州仪器

Dual 1.5A Current Source Camera Flash LED Driver

文件：1.47914 Mbytes 页数：41 Pages

TI

德州仪器