CXLC8999/B

CXLC8999 CXLC8999B DC-DC转换器提供TSSOP封装的薄膜晶体管(TFT)液晶显示器(LCD)面板所需的调节电压。一个升压转换器、一个降压转换器和两个电荷泵将8V到14V的输入电压转换为四个输出电压。这些功能完成了大屏幕液晶面板的供电要求。升压转换器提供电源电压VS,降压转换器为系统提供逻辑电压。双电荷泵独立地产生可调节的输出电压VGL和VGH来偏置LCD。这四个模块以500kHz或750kHz的固定开关频率工作。升压和降压转换器都以异步开关模式工作。电流模式控制提供了快速的瞬态响应,简化了回路稳定。故障保护包括逐周限流、热停堆、升压变换器过压保护和降压变换器短路保护。两个电荷泵均采用电流模式控制,以调节其输出电压,从而使输出纹波和电容器尺寸最小化。CXLC8999/B提供28针TSSOP软件包。

CXLC8999 CXLC8999B DC-DC转换器薄膜晶体管TFT液晶显示器LCD面板所需的调节电压升压转换器降压转换器和两个电荷泵将8V到14V的输入电压转换为四个输出电压升压转换器提供电源电压VS降压转换器为系统提供逻辑电压

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1.产品概述       2.产品特点     tnG嘉泰姆

3.应用范围       4.技术规格书下载(PDF文档)tnG嘉泰姆

5.产品封装       6.电路原理图  tnG嘉泰姆

7.相关产品tnG嘉泰姆

   产品概述 返回TOPtnG嘉泰姆


The CXLC8999/B DC-DC converter provides regulated voltages required by thin-film transistor (TFT) liquid crystal displays (LCD) panels in TSSOP package. One step-up converter, one step-down converter, and two charge pumps convert the 8V to 14V input voltage into four output voltages. These features complete the powersupply requirements of large screen LCD panels. The step-up converter provides source voltages VS and the step-down converter provides logic voltage for the system. The dual charge pumps independently generate adjustable regulated output voltages VGL and VGH to bias the LCD. These four blocks operate with a fixed switching frequency of 500kHz or 750kHz. Both step-up and step-down converters operate in asynchronous switch mode. Current mode control provides fast transient response and eases loop stabilization. Fault protection includes cycle-by-cycle current limit, thermal shutdown, overvoltage protection of the step-up converter and short-circuit protection of the step-down converter. Current mode control is used for both charge pumps to regulate its output voltage, which minimizes output ripple and capacitor sizes. The CXLC8999/B is available in an 28-pin TSSOP package.

   产品特点 返回TOPtnG嘉泰姆


„ 8V to 14V Input Voltage Range tnG嘉泰姆

„ VS Output Voltage Range up to 19 V tnG嘉泰姆

„ 1% Accurate Boost Converter with 3A Switch Current tnG嘉泰姆

„ 1.5% Accurate 2.3A Step-Down Converter tnG嘉泰姆

„ 500kHz/750kHz Fixed Switching Frequency tnG嘉泰姆

„ 150mA Negative Charge Pump Driver for VGL tnG嘉泰姆

„ 150mA Positive Charge Pump Driver for VGH tnG嘉泰姆

„ Adjustable Sequencing for VGL, VGH tnG嘉泰姆

„ Gate Drive Signal to Drive External MOSFET tnG嘉泰姆

„ Internal and Adjustable Soft Start tnG嘉泰姆

„ Cycle-by-Cycle Over Current Protection tnG嘉泰姆

„ Short-Circuit Protection tnG嘉泰姆

„ Overvoltage Protection tnG嘉泰姆

„ Thermal Shutdown tnG嘉泰姆

„ Available in TSSOP-28 PackagetnG嘉泰姆

   应用范围 返回TOPtnG嘉泰姆


„ TFT LCD DisplaystnG嘉泰姆

   技术规格书(产品PDF) 返回TOP tnG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!tnG嘉泰姆

 QQ截图20160419174301.jpgtnG嘉泰姆

产品封装图 返回TOPtnG嘉泰姆


image.pngtnG嘉泰姆

电路原理图 返回TOPtnG嘉泰姆


atnG嘉泰姆

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