产品概述 返回TOPjgN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TOPjgN嘉泰姆

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

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

„ VS Step-Up Converter jgN嘉泰姆

‹ Current Mode jgN嘉泰姆

‹ 1% Feedback Accuracy jgN嘉泰姆

‹ Output Voltage Range up to 20V jgN嘉泰姆

‹ 3A Switch Current jgN嘉泰姆

‹ Adjustable Soft Start jgN嘉泰姆

‹ Adjustable Current Limit jgN嘉泰姆

„ VLOGIC Step-Down Converter jgN嘉泰姆

‹ Current Mode jgN嘉泰姆

‹ 1% Feedback Accuracy jgN嘉泰姆

‹ 2.5A Switch Current jgN嘉泰姆

‹ 2.5ms Internal Soft Start jgN嘉泰姆

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

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

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

„ High Voltage LDO for VREF jgN嘉泰姆

‹ 0.5% Feedback Accuracy jgN嘉泰姆

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

„ High-Speed Operational Amplifier jgN嘉泰姆

‹ 20MHz -3dB Bandwidth jgN嘉泰姆

‹ 45 V/μs Slew Rate jgN嘉泰姆

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

„ Gate Drive Signal to Drive External MOSFET jgN嘉泰姆

„ XAO Comparator jgN嘉泰姆

„ Thermal Shutdown jgN嘉泰姆

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

   应用范围 返回TOPjgN嘉泰姆

„ LCD TV PanelsjgN嘉泰姆

   技术规格书（产品PDF) 返回TOP jgN嘉泰姆

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