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Bias Power Supply for TFT LCD Panels CXLC8994 CXLC8994A/S includes a high-performance boost regulator, a VCOM buffer (unity gain OPA), a VGH charge pump driver, and a VGL charge pump driver for active | ||||||||||||||||||||||||||||||||||||||||
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目录产品概述 返回TOP The CXLC8994 CXLC8994A/S includes a high-performance boost regulator, a VCOM buffer (unity gain OPA), a VGH charge pump driver, and a VGL charge pump 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 the charge-pump driver operate with 600kHz switching frequency. The CXLC8994 CXLC8994A/S includes internal power-up sequencing, over/under voltage protections of the boost converter, and over temperature protection to ensure in safe operating. The CXLC8994 CXLC8994A/S are available in a 16-pin 3X3TQFN packages.产品特点 返回TOP „ 2.5V to 5.5V Input Supply Range „ 1.2MHz Current-Mode Boost Regulator Š Fast Transient Response to Pulse Load Š ±1% Accurate Output Voltage Š Built-In 20V/1.8A, 0.7Ω N-Channel MOSFET Š High Efficiency up to 90% Š Over-Current Protection Š Output Under-Voltage Protection „ High-Performance Operational Amplifier Š ±150mA Output Short-Circuit Current Š 12V/μs Slew Rate Š 12MHz, -3dB Bandwidth Š Rail-to-Rail Input and Output „ 600kHz Negative Charge Pump Driver for VGL „ 600kHz Positive Charge Pump Driver for VGH „ Power-On Sequence Control „ Thermal-Overload Protection „ TQFN3X3-16 Package 应用范围 返回TOP „ Photo Frame „ GPS „ UMPC 技术规格书（产品PDF) 返回TOP 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！
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Bias Power Supply for TFT LCD Panels CXLC8994 CXLC8994A/S includes a high-performance boost regulator, a VCOM buffer (unity gain OPA), a VGH charge pump driver, and a VGL charge pump driver for active
发表时间：2025-10-22浏览次数：109
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