LT3599 的典型应用是一款固定频率 2A 升压
DC/DC 转换器,设计用于驱动四串 120mA LED,输出电压高达 44V。开关频率可通过外部电阻在 200kHz 至 2.1MHz 范围内进行编程。 LED 调光可通过 CTRL 引脚上的模拟调光和 PWM 引脚上的
脉宽调制调光来实现。即使输入电压高于 LED 输出电压,LT3599 也能准确调节 LED 电流
说明
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Typical Application for LT3599 is a fixed frequency 2A step-up DC/DC converter designed to drive four strings of 120mA LEDs up to a 44V output voltage. The switching frequency is programmable from 200kHz to 2.1MHz through an external resistor. LED dimming can be achieved with analog dimming on the CTRL pin, and with pulse width modulation dimming on the PWM pin. The LT3599 accurately regulates LED current even when the input voltage is higher than the LED output voltage