产品概述 返回TOPARm嘉泰姆

The CXLC8991 DC-DC converter provides regulated voltages required by thin-film transistor (TFT) liquid crystal displays (LCD) panels in QFN6X6-40 package. One synchronous step-up converter, one asynchronous step-down converter, and two charge pumps regulators convert the 8V to 14V input voltage into four output voltages with 1 channel OPAMP. These features complete the power- supply requirements of large screen LCD panels. The step-up converter provides source voltages VAVDD and the step-down converter provides logic voltage VLOGIC for the system. The dual charge pumps regulators independently generate adjustable regulated output voltages VGL and VGH to bias the LCD using external charge pump attached to the switching node. The step-up converter and step-down converter operate with a fixed switching frequency of 750kHz, and all output are programmable. The CXLC8991 is available in a 40-pin QFN (6mm x 6mm) package

   产品特点 返回TOPARm嘉泰姆

„ Input Supply Range: 8V ~ 14V ARm嘉泰姆

„ Current Mode Sync-Boost Converter for AVDD ARm嘉泰姆

¾ Fixed 750kHz Switching Frequency ARm嘉泰姆

¾ 2.2A to 5A Programmable Current Limit ARm嘉泰姆

¾ 13.5V to 19.8V Programmable Output ARm嘉泰姆

¾ Integrated 20V/0.1Ω Switching N-MOSFET ARm嘉泰姆

„ Buck Converter for VLOGIC ARm嘉泰姆

¾ Fixed 750kHz Switching Frequency ARm嘉泰姆

¾ 2.2V to 3.7V Programmable Output ARm嘉泰姆

¾ Integrated 12V/0.2Ω Switching N-MOSFET ARm嘉泰姆

„ Positive Charge-Pump Regulator for VGH ARm嘉泰姆

¾ 20V to 35V Programmable Output ARm嘉泰姆

¾ Thermal Compensation ARm嘉泰姆

„ Negative Charge-Pump Regulator for VGL ARm嘉泰姆

¾ -4.5V to -13.5V Programmable Output ARm嘉泰姆

„ Built-in Power-On Sequence and Soft-Start Function ARm嘉泰姆

„ Isolation Switching PMOS for AVDD ARm嘉泰姆

„ Protection Function ARm嘉泰姆

¾ Input Under Voltage Lockout (UVLO) ARm嘉泰姆

¾ Over-Temperature Protection (OTP) ARm嘉泰姆

¾ Over-Voltage Protection (OVP) ARm嘉泰姆

¾ Over-Current Protection (OCP) ARm嘉泰姆

¾ Output Under Voltage Protection (UVP) ARm嘉泰姆

¾ Short Circuit Protection (SCP) ARm嘉泰姆

„ 2-Wire I2 C Slave Mode Interface ARm嘉泰姆

„ Available in QFN6X6-40 PackageARm嘉泰姆

   应用范围 返回TOPARm嘉泰姆

„ TFT LCD DisplaysARm嘉泰姆

   技术规格书（产品PDF) 返回TOP ARm嘉泰姆

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