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LM3500TLX-21 DC/DC Step-Up Converter 21V 8-bump micro SMD marking Synchronous Step-up DC/DC Converter for White LED
控制方式 MODE | PWM |
输入电压VIN Input Voltage | 2.7~ 7V |
输出电压VOUT Output Voltage | 21V |
输出电流IOUT Output Current | 300uA |
震荡频率FOSC Oscillation Frequency | 850KHz ~ 1.15MHz |
内置FET Built-in FET | PMOS |
Description & Applications | Synchronous Step-up DC/DC Converter for White LED Applications •Synchronous rectification, high efficiency and no external schottky diode required •Uses small surface mount components Can drive 2-5 white LEDs in series (may function with more low-VF LEDs) •2.7V to 7V input range •Internal output over-voltage •protection (OVP) circuitry, with no external zener diode required •LM3500-16: 15.5V OVP; LM3500-21: 20.5V OVP. •True shutdown isolation •Input undervoltage lockout •Requires only small ceramic capacitors at the input and output Thermal Shutdown •0.1µA shutdown current •Small 8-bump thin micro SMD package LCD Bias Supplies •White LED Backlighting •Handheld Devices •Digital Cameras •Portable Applications |
描述与应用 | 同步降压型DC/ DC转换器,用于白光LED 应用 •同步整流,效率高,无需外部肖特基二极管 •使用小型表面贴装元件 •可以驱动2-5个串联白色LED(可与更多的低VF的LED功能) •2.7V至7V输入范围 •内部输出过电压保护(OVP)电路,无需外部齐纳二极管 LM3500-16:15.5V •精确的关断隔离 •输入欠压锁定 只需要小型的陶瓷电容器的输入和输出 •热关断 •关断电流0.1μA •小8焊球的薄型micro SMD封装 •LCD偏置电源 •白光LED背光 •手持设备 •数码相机 •便携式应用 |