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Integrated Power Supply for TFT-LCD Panels with 1-Channel White LED Driver CXLC8985 includes a high-performance boost regulator, a VCOM buffer (unity gain OPA), a VGH charge pump driver, a VGL charge | ||||||||||||||||||||||||||||||||||||
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目录产品概述 返回TOP 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TOP „ 2.5V to 5.5V Input Supply Range „ Active-High Enable Control „ 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 „ White LED Driver Š 1MHz Switching Frequency Š 20V/1.2A, 0.3Ω N-channel MOSFET Š Input Under Voltage Protection Š Over Current Protection Š Over Voltage Protection Š Digital Dimming Control „ Power-On Sequence Control „ Thermal-Overload Protection „ RoHs Compliant „ TQFN4X4-24 Package 应用范围 返回TOP „ Notebook Computer Displays „ UMPCs „ Medium Size LCD Panel 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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Integrated Power Supply for TFT-LCD Panels with 1-Channel White LED Driver CXLC8985 includes a high-performance boost regulator, a VCOM buffer (unity gain OPA), a VGH charge pump driver, a VGL charge
发表时间：2025-10-22浏览次数：118
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