CXLC8985

CXLC8985包括高性能升压调节器、VCOM缓冲器(单位增益OPA)、VGH电荷泵驱动器、VGL电荷泵驱动器和用于有源矩阵薄膜晶体管(TFT)液晶显示器(LCD)的白色LED驱动器。boost转换器为面板源驱动器ic提供稳压电源。该转换器是一个高开关频率(1.2兆赫)电流模式稳压器,集成了20伏N通道0.7ΩMOSFET,允许使用超小电感和陶瓷电容。它提供了对脉冲加载的快速瞬态响应,同时达到了90%以上的效率。该装置可从低至2.8V的输入端产生高达18V的输出电压,VCOM缓冲器可驱动具有高短路电流(150mA)、快速转换速率(12V/μs)、宽带宽(12MHz)和轨对轨输入/输出的LCD VCOM电压。正电荷泵驱动器和负电荷泵驱动器提供可调节的输出电压VGH和VGL,以偏置TFT。两个电荷泵驱动器都以600kHz的开关频率工作。LED驱动器自动调节LED灯条的电源电压,无需计算不同LED类型的输出。它还集成了一个提供高输出功率的20V n沟道MOSFET。低参考电压使电流整定电阻器的功率损耗最小化。一个使能输入可以反复脉冲调整LED的亮度。LED驱动器的boost变换器采用过电流保护和过电压保护,保证了系统的安全运行。CXLC8985包括内部通电顺序、升压转换器的过压/欠压保护和确保安全运行的过热保护。

CXLC8985高性能升压调节器VCOM缓冲器VGH电荷泵驱动器VGL电荷泵驱动器和用于有源矩阵薄膜晶体管TFT液晶显示器LCD的白色LED驱动器boost转换器为面板源驱动器ic提供稳压电源

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目录

1.产品概述       2.产品特点     3Mj嘉泰姆

3.应用范围       4.技术规格书下载(PDF文档)3Mj嘉泰姆

5.产品封装       6.电路原理图  3Mj嘉泰姆

7.相关产品3Mj嘉泰姆

   产品概述 返回TOP3Mj嘉泰姆


The CXLC8985 includes a high-performance boost regulator, a VCOM buffer (unity gain OPA), a VGH charge pump driver, a VGL charge pump driver, and white LED driver for active-matrix thin-film transistor (TFT) liquid-crystal displays (LCDs). The boost converter provides the regulated supply voltage for the panel source driver ICs. The converter is a high switching frequency (1.2MHz) current mode regulator with an integrated 20V N-Channel 0.7Ω MOSFET that allows the use of ultra-small inductors and ceramic capacitors. It provides fast transient response to pulsed loading while achieving efficiency over 90%. The device can produce output voltage as high as 18V from an input as low as 2.8V. The VCOM buffer can drive the LCD VCOM voltage that features high short-circuit current (150mA), fast slew rate (12V/μs), wide bandwidth (12MHz) and rail-to-rail input/output. A positive and a negative charge-pump driver provide adjustable regulated output voltages VGH and VGL to bias the TFT. Both charge-pump drivers operate with 600kHz switching frequency. The LED driver automatically regulated supply voltage for the LED light bars without the need to calculate the output for different LED types. It also integrates a 20V n-channel MOSFET that provides high output power. The low reference voltage minimized the power loss across the current-setting resistor. An enable input can be pulsed repeatedly to adjust LED’s brightness. The boost converter of the LED driver incorporates over current protection and over voltage protection to ensure safety operation. The CXLC8985 includes internal power-up sequencing, over/under voltage protections of the boost converter, and over temperature protection to ensure in safe operating. The CXLC8985 is available in a 24-pin 4X4 TQFN package.

   产品特点 返回TOP3Mj嘉泰姆


„ 2.5V to 5.5V Input Supply Range 3Mj嘉泰姆

„ Active-High Enable Control 3Mj嘉泰姆

„ 1.2MHz Current-Mode Boost Regulator 3Mj嘉泰姆

Š Fast Transient Response to Pulse Load 3Mj嘉泰姆

Š ±1% Accurate Output Voltage 3Mj嘉泰姆

Š Built-In 20V/1.8A, 0.7Ω N-Channel MOSFET 3Mj嘉泰姆

Š High Efficiency up to 90% 3Mj嘉泰姆

Š Over-Current Protection 3Mj嘉泰姆

Š Output Under-Voltage Protection 3Mj嘉泰姆

„ High-Performance Operational Amplifier 3Mj嘉泰姆

Š ±150mA Output Short-Circuit Current 3Mj嘉泰姆

Š 12V/μs Slew Rate Š 12MHz, -3dB Bandwidth 3Mj嘉泰姆

Š Rail-to-Rail Input and Output 3Mj嘉泰姆

„ 600kHz Negative Charge Pump Driver for VGL 3Mj嘉泰姆

„ 600kHz Positive Charge Pump Driver for VGH 3Mj嘉泰姆

„ White LED Driver Š 1MHz Switching Frequency 3Mj嘉泰姆

Š 20V/1.2A, 0.3Ω N-channel MOSFET 3Mj嘉泰姆

Š Input Under Voltage Protection 3Mj嘉泰姆

Š Over Current Protection 3Mj嘉泰姆

Š Over Voltage Protection 3Mj嘉泰姆

Š Digital Dimming Control 3Mj嘉泰姆

„ Power-On Sequence Control 3Mj嘉泰姆

„ Thermal-Overload Protection 3Mj嘉泰姆

„ RoHs Compliant 3Mj嘉泰姆

„ TQFN4X4-24 Package3Mj嘉泰姆

   应用范围 返回TOP3Mj嘉泰姆


„ Notebook Computer Displays 3Mj嘉泰姆

„ UMPCs 3Mj嘉泰姆

„ Medium Size LCD Panel3Mj嘉泰姆

   技术规格书(产品PDF) 返回TOP 3Mj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!3Mj嘉泰姆

 QQ截图20160419174301.jpg3Mj嘉泰姆

产品封装图 返回TOP3Mj嘉泰姆


image.png3Mj嘉泰姆

电路原理图 返回TOP3Mj嘉泰姆


a3Mj嘉泰姆

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◀ 上一篇:CXLC8984升压转换器两个电荷泵和一个用于TFT LCD的大电流运算放大器逻辑控制的可调延迟高压开关和一个开漏输出复位比较器升压型DC/DC变换器为面板电源驱动芯片提供稳压电源

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下一篇▶:CXLC8986 CXLC8987包括高性能升压稳压器6通道LED驱动器低损耗线性稳压器LDO门脉冲调制器GPM电压检测器VCOM缓冲器和用于有源矩阵薄膜晶体管TFT液晶显示器LCD的VGL线性稳压器