CXLC8991

CXLC8991 DC-DC转换器提供QFN6X6-40封装的薄膜晶体管(TFT)液晶显示器(LCD)面板所需的调节电压。一个同步升压变换器、一个异步降压变换器和两个电荷泵稳压器将8V到14V的输入电压转换为四个输出电压,并带有一个通道运放。这些功能完成了大屏幕液晶面板的供电要求。升压变换器提供源电压VAVDD,降压变换器为系统提供逻辑电压VLOGIC。双电荷泵稳压器独立地产生可调节的输出电压VGL和VGH,使用连接到开关节点的外部电荷泵来偏置LCD。升压变换器和降压变换器以750kHz的固定开关频率工作,所有输出都是可编程的

CXLC8991同步升压变换器异步降压变换器和两个电荷泵稳压器将8V到14V的输入电压转换为四个输出电压带有一个通道运放升压变换器提供源电压VA VDD降压变换器为系统提供逻辑电压VLOGIC

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产品简介

目录

1.产品概述       2.产品特点     YXX嘉泰姆

3.应用范围       4.技术规格书下载(PDF文档)YXX嘉泰姆

5.产品封装       6.电路原理图  YXX嘉泰姆

7.相关产品YXX嘉泰姆

   产品概述 返回TOPYXX嘉泰姆


The CXLC8991 DC-DC converter provides regulated voltages required by thin-film transistor (TFT) liquid crystal displays (LCD) panels in QFN6X6-40 package. One synchronous step-up converter, one asynchronous step-down converter, and two charge pumps regulators convert the 8V to 14V input voltage into four output voltages with 1 channel OPAMP. These features complete the power- supply requirements of large screen LCD panels. The step-up converter provides source voltages VAVDD and the step-down converter provides logic voltage VLOGIC for the system. The dual charge pumps regulators independently generate adjustable regulated output voltages VGL and VGH to bias the LCD using external charge pump attached to the switching node. The step-up converter and step-down converter operate with a fixed switching frequency of 750kHz, and all output are programmable. The CXLC8991 is available in a 40-pin QFN (6mm x 6mm) package

   产品特点 返回TOPYXX嘉泰姆


„ Input Supply Range: 8V ~ 14V YXX嘉泰姆

„ Current Mode Sync-Boost Converter for AVDD YXX嘉泰姆

¾ Fixed 750kHz Switching Frequency YXX嘉泰姆

¾ 2.2A to 5A Programmable Current Limit YXX嘉泰姆

¾ 13.5V to 19.8V Programmable Output YXX嘉泰姆

¾ Integrated 20V/0.1Ω Switching N-MOSFET YXX嘉泰姆

„ Buck Converter for VLOGIC YXX嘉泰姆

¾ Fixed 750kHz Switching Frequency YXX嘉泰姆

¾ 2.2V to 3.7V Programmable Output YXX嘉泰姆

¾ Integrated 12V/0.2Ω Switching N-MOSFET YXX嘉泰姆

„ Positive Charge-Pump Regulator for VGH YXX嘉泰姆

¾ 20V to 35V Programmable Output YXX嘉泰姆

¾ Thermal Compensation YXX嘉泰姆

„ Negative Charge-Pump Regulator for VGL YXX嘉泰姆

¾ -4.5V to -13.5V Programmable Output YXX嘉泰姆

„ Built-in Power-On Sequence and Soft-Start Function YXX嘉泰姆

„ Isolation Switching PMOS for AVDD YXX嘉泰姆

„ Protection Function YXX嘉泰姆

¾ Input Under Voltage Lockout (UVLO) YXX嘉泰姆

¾ Over-Temperature Protection (OTP) YXX嘉泰姆

¾ Over-Voltage Protection (OVP) YXX嘉泰姆

¾ Over-Current Protection (OCP) YXX嘉泰姆

¾ Output Under Voltage Protection (UVP) YXX嘉泰姆

¾ Short Circuit Protection (SCP) YXX嘉泰姆

„ 2-Wire I2 C Slave Mode Interface YXX嘉泰姆

„ Available in QFN6X6-40 PackageYXX嘉泰姆

   应用范围 返回TOPYXX嘉泰姆


„ TFT LCD DisplaysYXX嘉泰姆

   技术规格书(产品PDF) 返回TOP YXX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!YXX嘉泰姆

 QQ截图20160419174301.jpgYXX嘉泰姆

产品封装图 返回TOPYXX嘉泰姆


image.pngYXX嘉泰姆

电路原理图 返回TOPYXX嘉泰姆


aYXX嘉泰姆

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◀ 上一篇:CXLC8990升压稳压器为面板源驱动芯片提供稳压电源一个高开关频率1.2MHz电流模式稳压器集成了20V/0.15ΩNMOS开关提供了对脉冲加载的快速瞬态响应实现了85%以上的效率

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下一篇▶:CXLC8992升压转换器正电荷泵和负电荷泵内置延时的逻辑控制高压开关升压型DC/DC变换器为面板电源驱动芯片提供稳压电源变换器是工作频率为1.2MHz的高性能电流模式稳压器提供快速的瞬态响应和高效率电荷泵调节LCD面板的TFT栅极开和关电源