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首页 > 产品中心 > LED驱动电路 > LCD驱动芯片 > 液晶显示驱动 >CXLC89101升压转换器降压转换器两个电荷泵稳压器将8V到14V的输入电压转换成四个输出电压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
CXLC89101升压转换器降压转换器两个电荷泵稳压器将8V到14V的输入电压转换成四个输出电压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
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CXLC89101 DC-DC转换器提供TQFN5X5-28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稳压器将8V到14V的输入电压转换成四个输出电压。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。升压变换器的开关频率可从500kHz调整到2MHz。降压变换器以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、热关机和短路保护、升压变换器过电压保护

CXLC89101升压转换器降压转换器两个电荷泵稳压器将8V到14V的输入电压转换成四个输出电压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
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1.产品概述       2.产品特点     o89嘉泰姆

3.应用范围       4.技术规格书下载(PDF文档)o89嘉泰姆

5.产品封装       6.电路原理图  o89嘉泰姆

7.相关产品o89嘉泰姆

   产品概述 返回TOPo89嘉泰姆


The CXLC89101 DC-DC converter provides regulated voltages required by thin-film transistor (TFT) liquid crystal displays (LCD) panels in TQFN5X5-28 package. One step-up converter, one step-down converter, and two charge pumps regulators converter the 8V to 14V input voltage into four output voltages. 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 operates with a adjustable switching frequency from 500kHz to 2MHz. And step-down converter operates with a fixed switching frequency of 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 and short-circuit protection, and over voltage protection of the step-up converter. The CXLC89101 is available in a 28-pin TQFN (5mm x 5mm) package

   产品特点 返回TOPo89嘉泰姆


„ Input Supply Range: 9.5V ~ 14V o89嘉泰姆

„ Current mode Boost converter for AVDD o89嘉泰姆

¾ Adjustable switching frequency o89嘉泰姆

¾ Integrated 20V/4A ,0.1Ω switching N-MOSFET o89嘉泰姆

¾ 1.5% accurate with 3.5-A switching current o89嘉泰姆

„ Buck Converter for VLOGIC o89嘉泰姆

¾ Fixed 750kHz switching frequency o89嘉泰姆

¾ Integrated 12-V/0.2-C Switching N-MOSFET o89嘉泰姆

¾ 1.5% accurate with 1.5-A switching current o89嘉泰姆

„ Charge-pump regulator for VGON & VGOFF o89嘉泰姆

„ Built-in power-on sequence and soft-start function o89嘉泰姆

„ GD Signal to drive external P-MOSFET o89嘉泰姆

„ Protection Function o89嘉泰姆

¾ Input Under Voltage Lockout (UVLO) o89嘉泰姆

¾ Thermal overload Protection (TOP) o89嘉泰姆

¾ Over-Voltage Protection for (OVP) o89嘉泰姆

¾ Over-Current Protection (OCP) o89嘉泰姆

¾ Output Under Voltage Protection (UVP) o89嘉泰姆

¾ Short Circuit Protection (SCP) o89嘉泰姆

„ Available in TQFN-5X5-28 Packageo89嘉泰姆

   应用范围 返回TOPo89嘉泰姆


„ TFT LCD Displayso89嘉泰姆

   技术规格书(产品PDF) 返回TOP o89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!o89嘉泰姆

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产品封装图 返回TOPo89嘉泰姆


image.pngo89嘉泰姆

电路原理图 返回TOPo89嘉泰姆


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