驅動器類型 Constant Current
電壓 - 電源 2.5-42
電流 - 輸出/通道 150mA
效率(%) PWM
功率晶體管 Built-in
腳位/封裝 SOT23-6
文件 Eval Board
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 3171
焊接 L = 無鉛
温規 S4 = 工業級 (-40ºC to 125ºC)
外包裝 卷轴包
相關IC编號

IS31LT3171-STLS4-TR 特徵

  • Low-side current sink
  • - Current preset to 10mA - Adjustable from 10mA to 150mA with external resistor selection
  • Wide input voltage range from
  • - 2.5V to 42V (IS31LT3171) - 5V to 42V (IS31LT3170) with a low dropout of typical 1V
  • Up to 10kHz PWM input (IS31LT3171 only)
  • Protection features:
  • - 0.26%/K negative temperature coefficient at high temp for thermal protection
  • Up to 1W power dissipation in a small SOT23-6 package
  • RoHS compliant (Pb-free) package
  • Architectural LED lighting
  • Channel letters for advertising, LED strips for decorative lighting
  • Retail lighting in fridge, freezer case and vending machines

概觀

The IS31LT3170 and IS31LT3171 are adjustable linear current devices with excellent temperature stability. A single resistor is all that is required to set the operating current from 10mA to 150mA. The devices can operate from an input voltage from 2.5V to 42V with a minimal voltage headroom of 1V (typical). Designed with a low dropout voltage; the device can drive LED strings close to the supply voltage without switch capacitors or inductors. The IS31LT3170/71 simplifies designs by providing a stable current without the additional requirement of input or output capacitors, inductors, FETs or diodes. The complete constant current driver requires only a current set resistor and a small PCB area making designs both efficient and cost effective. The EN pin (1) of the IS31LT3170 can be tied to Vbat or BCM PWM signal for high side dimming. The EN Pin (1) of the IS31LT3171 can function as the PWM signal input used for low side dimming. As a current sink it is ideal for LED lighting applications or current limiter for power supplies. The device is provided in a lead (Pb) free, SOT23-6 package.