ZXLD1937 1W恒流LED升壓驅動芯片

       The ZXLD1937 is a PFM inductive boost converter digned for driving 2, 3 or 4 seri connected white LEDs from a Li-Ion cell and up to 8 LEDs from a 5V supply. The device operat from an input supply of  between 2.5V and 5.5V and provid an adjustable output current of up to 50mA. The ZXLD1937 includ the output switch and peak current sense ristor, and can operate with a maximum output voltage of 28V. Quicent current is tically 60H9262A and a shutdown function is provided to reduce this current to ls than 500nA in the 'off' state.

      FEATUR： 1mm height profile TSOT23-5 pin package； Internal PWM filter for flicker free output；High efficiency (80% t)；Wide input voltage range: 2.5V to 5.5V； Up to 50mA output current； Low quicent current: (60H9262A t)； 500nA maximum shutdown current； Up to 1MHz switching frequency；Low external component count；Inherently matched LED currents；Output current can be adjusted by applying a PWM；control signal to the 'Enable' pin.

         APPLICATIONS： Mobile phon； Dial cameras； PDAs； LCD modul；   Portable internet applianc； Palm computers.

  

     ZXLD1101   LED升壓驅動器，輸入電壓2.5 - 5.5V，輸出電壓28V(max)，350mA

     ZXLD1350   7V-30V輸入，350mA LED驅動器，內置開關 

     ZXLB1600   LED/OLED升壓偏置，輸入電壓1.6 - 5.5V，輸出電壓28V，驅動電流350mA

     ZXLD1100   LED升壓驅動器，輸入電壓2.5 - 5.5V，輸出電壓28V(max)，350mA

     ZXSC300   LED升壓/降壓驅動器，輸入電壓0.8 - 8.0V，_，外置開關

     ZXSC310    LED升壓/降壓驅動器，輸入電壓0.8 - 8.0V， 外置開關        

     ZXSC380    0.8-10Vin手電筒/背光LED驅動。SOT23

     ZXS00    LED升壓驅動器，輸入電壓1.8 - 8.0V，外置開關       

     ZXS40   相機閃光燈驅動器，輸入電壓1.8 - 8.0V， 外置開關        

     ZXLD1321  在1V至12V輸入電壓范圍內工作，提供1A的LED電流         

     ZXLD1322  降壓/升壓式驅動器，可在2.5V 至15V輸入電壓范圍內提供700mA電流

     ZXLD1575   x1/x1.5充電泵6通道驅動器，輸入電壓2.7至5.5V，輸出電壓5.5V，電流120mA 

     ZXLD1937  LED升壓驅動器， 2.5 - 5.5Vin，輸出電壓28V(max)，驅動電流350 mA

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