Bias Power Supply with High-Speed Amplifier and High-Accuracy LDO for LCD TVs CXLC89100/A DC-DC converter provides regulated voltages required by thin-film transistor (TFT) liquid crystal displays

   产品概述 返回TOPkpw嘉泰姆

The CXLC89100/A DC-DC converter provides regulated voltages required by thin-film transistor (TFT) liquid crystal displays (LCD) panels in TQFN package. One step-up converter, one step-down converter, and two charge pumps convert the 8V to 14V input voltage into four output voltages. These features complete the powersupply requirements of large screen LCD panels. The step-up converter provides source voltages VS and the step-down converter provides logic voltage for the system. The dual charge pumps independently generate adjustable regulated output voltages VGL and VGH to bias the LCD. These four blocks operate with a fixed switching frequency of 500kHz or 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 output-fault shutdown. Current mode control is used for both charge pumps to regulate its output voltage, which minimizes output ripple and capacitor sizes. High voltage switch is used for gate voltage shaping to improve TFT-LCD display quality. The CXLC89100/A includes one high-speed high-current operational amplifier and one high-accuracy LDO for Gamma buffer reference. The CXLC89100/A is available in a 48-pin TQFN package.

   产品特点 返回TOPkpw嘉泰姆

„ 8V to 14V Input Voltage Range kpw嘉泰姆

„ 500kHz/750kHz Fixed Switching Frequency kpw嘉泰姆

„ VS Step-Up Converter kpw嘉泰姆

‹ Current Mode kpw嘉泰姆

‹ 1% Feedback Accuracy kpw嘉泰姆

‹ Output Voltage Range up to 20V kpw嘉泰姆

‹ 3A Switch Current kpw嘉泰姆

‹ Adjustable Soft Start kpw嘉泰姆

‹ Adjustable Current Limit kpw嘉泰姆

„ VLOGIC Step-Down Converter kpw嘉泰姆

‹ Current Mode kpw嘉泰姆

‹ 1% Feedback Accuracy kpw嘉泰姆

‹ 2.5A Switch Current kpw嘉泰姆

‹ 2.5ms Internal Soft Start kpw嘉泰姆

„ 150mA Negative Charge Pump Driver for VGL kpw嘉泰姆

„ 150mA Positive Charge Pump Driver for VGH kpw嘉泰姆

„ Integrated High Voltage Switch for Gate Voltage Shaping kpw嘉泰姆

„ High Voltage LDO for VREF kpw嘉泰姆

‹ 0.5% Feedback Accuracy kpw嘉泰姆

‹ 0.5V Dropout at 60mA Output Current kpw嘉泰姆

„ High-Speed Operational Amplifier kpw嘉泰姆

‹ 20MHz -3dB Bandwidth kpw嘉泰姆

‹ 45 V/μs Slew Rate kpw嘉泰姆

‹ ±200-mA Short-Circuit Current kpw嘉泰姆

„ Gate Drive Signal to Drive External MOSFET kpw嘉泰姆

„ XAO Comparator kpw嘉泰姆

„ Thermal Shutdown kpw嘉泰姆

„ Available in 7mmx7mm 48-pin TQFN Packagekpw嘉泰姆

   应用范围 返回TOPkpw嘉泰姆

„ LCD TV Panelskpw嘉泰姆

   技术规格书（产品PDF) 返回TOP kpw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！kpw嘉泰姆