輸出數 2
類型 Flash/Torch
電流 - 輸出/通道 (mA) 1.5A
電壓 - 電源 2.7 – 5.5
ISD(uA) 1.0
Intensity Ctrl. Enable Pin
腳位/封裝 DFN-14(3x2)
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 3233
硅片版本 A
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

IS31BL3233A-DLS2-TR 特徵

  • Dual flash LED outputs
  • Drive up to total 1.5A or 0.75A per channel
  • 1s time out in Flash Mode to protect LED
  • High efficiency up to 93% (1A, Flash Mode)
  • 2MHz step-up converter
  • Independent Flash Mode enable and Torch Mode enable pins Integrated thermal regulation control
  • Torch Mode dimming via PWM control
  • LED open/short protection
  • Over-voltage protection
  • Cycle-by-cycle inductor current limit
  • Pb-free package: DFN-14 (2mm×3mm)
  • Mobile phones
  • Smart phones and PDAs

概觀

The IS31BL3233A is the ideal power solution for high-power flash LEDs used with cell phone camera modules or digital still cameras. It is a highly integrated step up DC-DC converter with very high switching frequency, fixed at 2MHz, providing a very small total solution for portable photo flash. The IS31BL3233A has separate Flash Mode and Torch Mode enable pins for maximum flexibility. The Flash Mode and Torch Mode LED current is programmed by external resistors respectively, making the flash LED solution simple to control. If both enable pins are at logic high, the LED current will be programmed by the Torch Mode setting resistor. The two LED output sinks can be shorted together externally for higher power single flash LEDs, up to 1.5A continuous LED current. Thermal regulation is integrated in Flash Mode to limit the IC’s temperature and continuously provide the maximum allowed output current. Various protection features are built into the IS31BL3233A, including cycle-by-cycle input current limit protection, output over-voltage protection, LED fault (open or short) protection and thermal shutdown protection. The IS31BL3233A is available in a RoHS compliant DFN-14 (2mm × 3mm) package.