TV TFT LCD面板的多路输出电源Multi-Output Power Supplies for TV TFT LCD Panels CXLC8960 通过12V输入电压，产生TFT LCD电视面板所需的四路电源。它们包括一个降压转换器，一个升压转换器，一个正电荷泵和一个负电荷泵。其中降压转换器和升压转换器集成内部功率MOSFET，并且具有高工作频率这样可以使用更小的外部电感和电容，得到一个紧

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       CXLC8960 通过12V输入电压，产生TFT LCD电视面板所需的四路电源。它们包括一个降压转换器，一个升压转换器，一个正电荷泵和一个负电荷泵。其中降压转换器和升压转换器集成内部功率MOSFET，并且具有高工作频率这样可以使用更小的外部电感和电容，得到一个紧凑的解决方案。升压转换器提供TFT 源极电源驱动电压，降压转换器提供系统逻辑部分的电源电压。两个转换器使用固定开关频率的电流模控制架构，具有快速的负载响应和简单的补偿结构。正电荷泵和负电荷泵提供TFT 栅极电压驱动电源。四路电源的输出电压可以分别通过外部分压电阻设定。两个转换器和两个电荷泵都被一个中央时钟控制开关动作，这个时钟可以通过芯片的FREQ引脚的高或低来设定750kHz或500kHz的工作频率。CXLC8960 具有可调节的电源上电时序。升压转换器具有的输出过压保护，降压转换器具有的输出短路保护以及整体的过温保护来确保安全工作。这个芯片也集成了一个栅极驱动信号，用来控制外部串联在VS和VGH之间的隔离MOSFET开关。The CXLC8960 generates all the four supply rails for thin-film transistor liquid-crystal display (TFT LCD) TV panels operating from a regulated 12V input. They include a step-down and a step-up regulator, a positive and a negative charge pump. The step-up and step-down switching regulators feature internal power MOSFETs and high-frequency operation allowing the use of small inductors and capacitors, resulting in a compact solution. The step-up regulator provides TFT source driver supply voltage, while the step-down regulator provides the system with logic supply voltage. Both regulators use fixed-frequency current-mode control architectures, providing fast load-transient response and easy compensation. The positive and negative charge-pump regulators provide TFT gate-driver supply voltages. Both output voltages can be adjusted with external resistive voltage-dividers. Both switching regulators and both charge pumps operate from a central clock that can be set to either 750 kHz or 500 kHz by tying the FREQ pin high or low. The CXLC8960 features adjustable power-up sequencing, step-up regulator over voltage protection, step-down regulator short-circuit protection, and over temperature protection to ensure in safe operating. The device also incorporates a gate drive signal to control an external MOSFET isolation switch connected in series with VS or VGH.

   产品特点 返回TOPmc7嘉泰姆

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‧输入电压范围：8V至14.7Vmc7嘉泰姆

‧可选择频率 (500kHz/750kHz)mc7嘉泰姆

‧电流模式的升压转换器mc7嘉泰姆

集成20V，3.7A，100mΩ的MOSFETmc7嘉泰姆

‧电流模式的降压转换器mc7嘉泰姆

集成20V，2.3A，175mΩ的MOSFETmc7嘉泰姆

‧100mA电荷泵输出电流</p>

‧负电荷泵驱动VGLmc7嘉泰姆

‧正电荷泵驱动VGHmc7嘉泰姆

‧VGL和VGH时序可调mc7嘉泰姆

‧栅极驱动信号驱动外部MOSFETmc7嘉泰姆

‧内部和外部可调软启动mc7嘉泰姆

‧短路保护mc7嘉泰姆

‧过压保护mc7嘉泰姆

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‧TSSOP-28(EP)封装mc7嘉泰姆

‧符合RoHS规范及Pb-Free，Halogen-Freemc7嘉泰姆

8V to 14.7V In Input Voltage Rangemc7嘉泰姆

Selectable Frequency (500kHz/750kHz)mc7嘉泰姆

Current-Mode Step-Up Regulatormc7嘉泰姆

- Built-In 20V, 3.7A, 100m
MOSFETmc7嘉泰姆

Current-Mode Step-Down Regulatormc7嘉泰姆

- Built-In 20V, 2.3A, 175m
MOSFETmc7嘉泰姆

100mA Charge Pump Output Currentmc7嘉泰姆

Negative Charge Pump Driver for VGLmc7嘉泰姆

Positive Charge Pump Driver for VGHmc7嘉泰姆

Adjustable Sequencing for VGL and VGHmc7嘉泰姆

Gate Drive Signal to Drive External MOSFETmc7嘉泰姆

Internal and Adjustable Soft Startmc7嘉泰姆

Short-Circuit Protectionmc7嘉泰姆

Over voltage Protectionmc7嘉泰姆

Thermal Shutdownmc7嘉泰姆

Available in TSSOP-28 (EP) Packagemc7嘉泰姆

RoHS Compliant and 100% Lead (Pb)-Freemc7嘉泰姆

Halogen-FreEmc7嘉泰姆

   应用范围 返回TOPmc7嘉泰姆

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‧用于显示器或液晶电视的TFT LCD 显示面板
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TFT LCD Displays for Monitor and LCD TVmc7嘉泰姆

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