60VIN/120VOUT Dual LED Controller with Exponential PWM and Scalable Dimming

DESCRIPTION The LT®8355-1 a dual-channel DC/DC controller designed to drive two strings of high current LEDs. The fixed frequency, current mode architecture results in stable operation over a wide range of supply and output voltages. Voltage feedback pins serve as the inputs for several LED

文件：2.44769 Mbytes 页数：30 Pages

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60VIN/120VOUT Dual LED Controller with Exponential PWM and Scalable Dimming

FEATURES - Two independent High Voltage LED Driver Controllers Channels 128:1 Internal Exponential PWM Dimming - Two-Pin Multiplying Analog Dimming (CH2) - Spread Spectrum Frequency Modulation - 20,000:1 External PWM Dimming at 100Hz - Rail-to-Rail LED Current Sensing: 0V to 120V - ±2 LED

文件：4.33304 Mbytes 页数：31 Pages

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具有指数PWM和可扩展调光的60VIN/120VOUT双LED控制器

LT8355-1是一款双通道DC/DC控制器，设计用于驱动两组大电流LED。固定频率、电流模式架构可在很宽的电源和输出电压范围内稳定运行。电压反馈引脚充当多个LED保护功能的输入，使得变流器可以作为恒压源运行。\n\n LT8355-1 在负载的高端或低端检测输出电流。CTRL2和IADJ2输入产品提供通道2输出电流的模拟编程。通道1输出电流目前通过CTRL1输入编程。PWM 输入和 PWMTG 高侧 PMOS 驱动器提供基于时间的精确 LED 调光能力。当由外部数字信号驱动时，PWM 输入在 100Hz 时提供高达 20000:1 的 LED 调光比。当由恒定电压驱动时，PWM 输 • 两个独立高电压LED驱动器控制器通道\n\n• 128:1 内部指数 PWM 调光\n\n• 两引脚乘法模拟调光（CH2）\n\n• 扩频调频\n\n• 20000:1 100Hz 外部 PWM 调光\n\n• 轨至轨 LED 电流检测：0V 至 120V\n\n• ±2% LED 电流调节\n\n• ±2% 输出电压调节\n\n• LED 短路/断路保护和指示\n\n• 宽输入电压范围 (5V 至 60V);

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60VIN/120VOUT Dual LED Controller with Exponential PWM and Scalable Dimming

FEATURES - Two independent High Voltage LED Driver Controllers Channels 128:1 Internal Exponential PWM Dimming - Two-Pin Multiplying Analog Dimming (CH2) - Spread Spectrum Frequency Modulation - 20,000:1 External PWM Dimming at 100Hz - Rail-to-Rail LED Current Sensing: 0V to 120V - ±2 LED

文件：4.33304 Mbytes 页数：31 Pages

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