ZXLD1937 1W恒流LED升压驱动芯片

       The ZXLD1937 is a PFM inductive boost converter designed for driving 2, 3 or 4 series connected white LEDs from a Li-Ion cell and up to 8 LEDs from a 5V supply. The device operates from an input supply of  between 2.5V and 5.5V and provides an adjustable output current of up to 50mA. The ZXLD1937 includes the output switch and peak current sense resistor, and can operate with a maximum output voltage of 28V. Quiescent current is typically 60H9262A and a shutdown function is provided to reduce this current to less than 500nA in the 'off' state.

      FEATURES： 1mm height profile TSOT23-5 pin package； Internal PWM filter for flicker free output；High efficiency (80% typ)；Wide input voltage range: 2.5V to 5.5V； Up to 50mA output current； Low quiescent current: (60H9262A typ)； 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 phones； Digital cameras； PDAs； LCD modules；   Portable internet appliances； Palmtop computers.

  

     ZXLD1101   LED升压驱动器，输入电压2.5 - 5.5V，输出电压28V(max)，350mA

     ZXLD1350   7V-30V输入，350mA LED驱动器，内置开关 

     ZXLB1600   LED/OLED升压偏置，输入电压1.6 - 5.5V，输出电压28V，驱动电流350mA

     ZXLD1100   LED升压驱动器，输入电压2.5 - 5.5V，输出电压28V(max)，350mA

     ZXSC300   LED升压/降压驱动器，输入电压0.8 - 8.0V，_，外置开关

     ZXSC310    LED升压/降压驱动器，输入电压0.8 - 8.0V， 外置开关        

     ZXSC380    0.8-10Vin手电筒/背光LED驱动。SOT23

     ZXSC400    LED升压驱动器，输入电压1.8 - 8.0V，外置开关       

     ZXSC440   相机闪光灯驱动器，输入电压1.8 - 8.0V， 外置开关        

     ZXLD1321  在1V至12V输入电压范围内工作，提供1A的LED电流         

     ZXLD1322  降压/升压式驱动器，可在2.5V 至15V输入电压范围内提供700mA电流

     ZXLD1575   x1/x1.5充电泵6通道驱动器，输入电压2.7至5.5V，输出电压5.5V，电流120mA 

     ZXLD1937  LED升压驱动器， 2.5 - 5.5Vin，输出电压28V(max)，驱动电流350 mA

    详细规格书请参阅：https://www.yuketek.com/product/32.html