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G5562

Global Mixed-mode Technology
Part Number G5562
Manufacturer Global Mixed-mode Technology
Description Bias Power Supply
Published Jan 10, 2016
Detailed Description Global Mixed-mode Technology Inc. G5562 Bias Power Supply with High-Speed Amplifier and High-Accuracy LDO for LCD TVs...
Datasheet PDF File G5562 PDF File

G5562
G5562


Overview
Global Mixed-mode Technology Inc.
G5562 Bias Power Supply with High-Speed Amplifier and High-Accuracy LDO for LCD TVs Features „ 8V to 14V Input Voltage Range „ 500kHz/750kHz Fixed Switching Frequency „ VS Step-Up Converter ‹ Current Mode ‹ 1% Feedback Accuracy ‹ Output Voltage Range up to 20V ‹ 3A Switch Current ‹ Adjustable Soft Start ‹ Adjustable Current Limit „ VLOGIC Step-Down Converter ‹ Current Mode ‹ 1% Feedback Accuracy ‹ 2.
5A Switch Current ‹ 2.
5ms Internal Soft Start „ 150mA Negative Charge Pump Driver for VGL „ 150mA Positive Charge Pump Driver for VGH „ Integrated High Voltage Switch for Gate Voltage Shaping „ High Voltage LDO for VREF ‹ 0.
5% Feedback Accuracy ‹ 0.
5V Dropout at 60mA Output Current „ High-Speed Operational Amplifier ‹ 20MHz -3dB Bandwidth ‹ 45 V/µs Slew Rate ‹ ±200-mA Short-Circuit Current „ Gate Drive Signal to Drive External MOSFET „ XAO Comparator „ Thermal Shutdown „ Available in 7mmx7mm 48-pin TQFN Package Applications „ LCD TV Panels Ordering Information ORDER NUMBER G5562R11U Note: R1: TQFN7X7-48 1: Bonding Code U: Tape & Reel MARKING 5562 General Description The G5562 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...


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