驅動器類型 AC/DC, Step-down
電壓 - 電源 8-450DC, 100-200AC
電流 - 輸出/通道 500mA±3%
效率(%) 90
功率晶體管 External
腳位/封裝 SOP-8
文件 T8_EB
狀態 Prod
產品系列 31 = 商業/工業模擬
產品類別 LT = 照明LED驅動器
IC代碼 3910
焊接 L = 無鉛
温規 S2 = 工業級 (-40ºC to 85ºC)
外包裝 卷轴包
相關IC编號

IS31LT3910-GRLS2-TR 特徵

  • Wide input range from 8VDC to 450DC or
  • 110VAC/220 VAC Temperature compensation to regulate LED current Application from a few mA to more than 1A output
  • Constant off-time operation
  • Linear and PWM dimming capability Switch mode controller for single switch LED drivers
  • Requires few external components for operation
  • DC/DC or AC/DC LED driver applications
  • General purpose constant current source

概觀

The IS31LT3910 is a peak current mode control LED driver IC. The IS31LT3910 operates in constant off- time mode. It allows efficient operation of High Brightness (HB) LEDs with voltage sources ranging from 8VDC to 450DC or 110VAC/220VAC. The IS31LT3910 includes a PWM dimming input that can accept an external control signal with a duty ratio of 0 - 100% and a frequency of up to a few kilohertz. It also includes a 0 - 240mV linear dimming input which can be used both for linear dimming and temperature compensation of the LED current. The IS31LT3910 is ideally suited for buck LED drivers. Since the IS31LT3910 operates in peak current mode control, the controller achieves good output current regulation without the need for any loop compensation. It achieves good PWM dimming response because the response time is limited only by the rate of rise and fall of the inductor current, enabling very fast rise and fall time.