G5562 Datasheet | Global Mixed-mode Technology

Global Mixed-mode Technology Inc. Bias Power Supply with High-Speed Amplifier and High-Accuracy LDO for LCD TVs Features - 8V to 14V Input Voltage Range - 500k Hz/750k Hz 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 - 150m A Negative Charge Pump Driver for VGL - 150m A 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 60m A Output Current - High-Speed Operational Amplifier ‹ 20MHz -3d B Bandwidth ‹ 45 V/µs Slew Rate ‹ ±200-m A Short-Circuit Current - Gate Drive Signal to Drive External MOSFET - XAO parator - 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 plete 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 500k Hz or 750k Hz. 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...