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G5561A

Global Mixed-mode Technology
Part Number G5561A
Manufacturer Global Mixed-mode Technology
Description Quad-Output TFT LCD Bias DC-DC Converter
Published Jan 10, 2016
Detailed Description Global Mixed-mode Technology Inc. G5561A Quad-Output TFT LCD Bias DC-DC Converter Features „ 8V to 14V Input Voltage ...
Datasheet PDF File G5561A PDF File

G5561A
G5561A

Overview
Global Mixed-mode Technology Inc.
G5561A Quad-Output TFT LCD Bias DC-DC Converter Features „ 8V to 14V Input Voltage Range „ VS Output Voltage Range up to 19 V „ 1% Accurate Boost Converter with 3A Switch Current „ 1.
5% Accurate 2.
3A Step-Down Converter „ 500kHz/750kHz Fixed Switching Frequency „ 150mA Negative Charge Pump Driver for VGL „ 150mA Positive Charge Pump Driver for VGH „ Adjustable Sequencing for VGL, VGH „ Gate Drive Signal to Drive External MOSFET „ Internal and Adjustable Soft Start „ Cycle-by-Cycle Over Current Protection „ Short-Circuit Protection „ Overvoltage Protection „ Thermal Shutdown „ Available in TSSOP-28 Package Applications „ TFT LCD Displays General Description The G5561A DC-DC converter provides regulated voltages required by thin-film transistor (TFT) liquid crystal displays (LCD) panels in TSSOP 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, overvoltage protection of the step-up converter and short-circuit protection of the step-down converter.
Current mode control is used for both charge pumps to regulate its output voltage, which minimizes output ripple and capacitor sizes.
The G5561A is available in an 28-pin TSSOP package.
Ordering Information ORDER NUMBER G5561AF41U Note: F4: TSSP-28 (FD) 1: Bonding Code U: Tape & Reel Pin...


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