• [ CXLC8957 ]"

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1.产品概述       2.产品特点     Zju嘉泰姆

3.应用范围       4.技术规格书下载（PDF文档）Zju嘉泰姆

5.产品封装       6.电路原理图  Zju嘉泰姆

7.相关产品Zju嘉泰姆

   产品概述 返回TOPZju嘉泰姆

     CXLC8957是一款高性能的电流模，可选择工作频率的PWM升压转换器。它具有2.1A，170mΩ的内部功率开关管，可以将5V输入电压转换成12V电压输出，并且输出电流达到500mA。620KHz和1.25MHz的可选频率允许选择较小的电感、更快的瞬态响应。用户可以利用外部补偿引脚设定环路补偿，提高了设计灵活性，允许在输出端接低ESR的陶瓷输出电容。软启动时间可以通过外接电容设定，从而确定启动时输入电流的上升斜率。当关断时，静态电流小于10μA。最低工作电压可达2.5V。这些特点以及1.25MHz开关频率使得芯片成为便携式设备及TFT-LCD显示器的理想解决方案。CXLC8957采用MSOP-8封装，工作温度范围为-40°C 到 +85°C。The CXLC8957 is a high performance current mode, PWM step-up converter with pin selectable operating frequency. With an internal 2.1A, 170mΩ MOSFET, it can generate 12V at up to 500mA output current from a 5V supply. The selectable 620kHz and 1.25MHz allows smaller inductors and faster transient response. An external compensation pin gives the user greater flexibility in setting loop compensation allowing the use of low ESR Ceramic output capacitors. Soft-start is controlled with an external capacitor, which determines the input current ramp rate during start-up. When shut down, it draws＜10μA of current and can operate down to 2.5V input supply. These features along with 1.25MHz switching frequency makes it an ideal device for portable equipment and TFT-LCD displays. The CXLC8957 is available in an 8-pin MSOP package. The device is specified for operation over the full -40°C to +85°C temperature range.

   产品特点 返回TOPZju嘉泰姆

• 效率高达90%Zju嘉泰姆

• 2.1A，170mΩ功率开关管Zju嘉泰姆

• 输入电压范围2.5V ~ 5.5VZju嘉泰姆

• 可调输出电压最高达28VZju嘉泰姆

• 620KHz/1.25MHz可选开关频率Zju嘉泰姆

• 可调软启动功能Zju嘉泰姆

• 内置热保护功能Zju嘉泰姆

• 小尺寸MSOP-8封装Zju嘉泰姆

• 符合RoHS规范及Pb-Freez 90% Efficiency Zju嘉泰姆

z 2.1A, 170mΩ Power MOSFET Zju嘉泰姆

z 2.5V to 5.5V Input Range Zju嘉泰姆

z Adjustable Output Voltage up to 28V Zju嘉泰姆

z 620kHz/1.25MHz Switching Frequency Selection z Adjustable Soft-Start Zju嘉泰姆

z Internal Thermal Protection Zju嘉泰姆

z Small MSOP-8 package Zju嘉泰姆

z RoHS Compliant and 100% Lead (Pb)-FreeZju嘉泰姆

   应用范围 返回TOPZju嘉泰姆

• TFT-LCD显示器Zju嘉泰姆

• DSL调制解调器Zju嘉泰姆

• 机顶盒Zju嘉泰姆

• PCMCIA接口卡Zju嘉泰姆

• 便携式设备Zju嘉泰姆

• 手持设备Zju嘉泰姆

z TFT-LCD Displays Zju嘉泰姆

z DSL Modems Zju嘉泰姆

z Set-Top Boxes Zju嘉泰姆

z PCMCIA Cards Zju嘉泰姆

z Portable Equipment Zju嘉泰姆

z Handheld DevicesZju嘉泰姆

   技术规格书（产品PDF) 返回TOP Zju嘉泰姆

     需要详细的PDF规格书请扫一扫微信联系我们，还可以获得免费样品以及技术支持！Zju嘉泰姆

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产品封装图 返回TOPZju嘉泰姆

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电路原理图 返回TOPZju嘉泰姆

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Next▶:The CXLC8958 generates power supply rails for thin-film transistor (TFT) liquid-crystal display (LCD) panels in tablet PCs and notebooks operated from 2.5V to 5.5V input supply