This is Bias Power Supply with High-Speed Amplifier and High-Accuracy LDO for LCD TVs.
Marking : 5562A
Part Number: G5562A, G5562AR11U
Function: Bias Power Supply with High-Speed Amplifier
Package: 7mmx7mm 48-pin TQFN
Manufacturer: Global Mixed-mode Technology ( http://www.gmt.com.tw )
See the preview image and the PDF file for more information.
The G5562A 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 power supply 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.
1. 8V to 14V Input Voltage Range
2. 500kHz/750kHz Fixed Switching Frequency
3. High Voltage LDO for VREF
4. Gate Drive Signal to Drive External MOSFET
5. XAO Comparator
6. Thermal Shutdown
1. LCD TV Panels
Other data sheets are available within the file: G5562AR11U, G5562A