輸出數 4/6
類型 Constant Current
電流 - 輸出/通道 (mA) 20
電壓 - 電源 2.8-5.5
ISD(uA) 0.5
Intensity Ctrl. Pulse Count
腳位/封裝 UTQFN-12(2x2)
文件 Eval Board
狀態 Prod
產品系列 31 = 商業/工業模擬
產品類別 BL = LCD背光的白色LED驅動器
IC代碼 3228
硅片版本 B
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
IS31BL3228A-UTLS2-TR

IS31BL3228B-UTLS2-TR 特徵

  • VCC range: 2.8V to 5.5V Fully programmable current with single wire 14 current levels Drives up to four (IS31BL3228A)/six (IS31BL3228B) channels of LEDs No inductors, low noise operation Built-in thermal protection Automatic soft start Low shutdown current: ISD <3μA UTQFN-12 (2mm×2mm) package
  • MP3, MP4, PMP

概觀

The IS31BL3228A (IS31BL3228B) is a low noise, constant frequency charge pump DC/DC converter for white LED applications. The IS31BL3228A (IS31BL3228B) is capable of driving up to four (six) channels of LEDs at preset 20mA per channel from a 2.8V to 5.5V input. The current sinks may be operated individually or in parallel for driving higher current LEDs. Only one 1μF small capacitor (at C+ thru C-) and two small 2.2μF capacitors (at VCC and VOUT) are needed, it makes this part ideally suited for small, battery-powered applications. The serial digital input is used to enable, disable, and set current for each LED with 14 settings down to 1.8mA. Each output of the IS31BL3228A/IS31BL3228B is equipped with built-in soft-start circuitry prevents excessive inrush current during start-up. A low-current shutdown feature disconnects the load from the input and reduces quiescent current to less than 3μA. The IS31BL3228A and IS31BL3228B are available in a Pb-free, space-saving UTQFN-12 (2mm×2mm) package.