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G5529

Global Mixed-mode Technology
Part Number G5529
Manufacturer Global Mixed-mode Technology
Description Integrated Multi-Channel DC-DC Converter
Published Jan 10, 2016
Detailed Description Global Mixed-mode Technology Inc. G5529 Integrated Multi-Channel DC-DC Converter for TFT-LCD Panels Features „ 2.5V t...
Datasheet PDF File G5529 PDF File

G5529
G5529

Overview
Global Mixed-mode Technology Inc.
G5529 Integrated Multi-Channel DC-DC Converter for TFT-LCD Panels Features „ 2.
5V to 5.
5V Input Supply Range „ 640kHz/1.
2MHz Current-Mode Boost Regulator Š Fast Transient Response to Pulse Load Š ±1% Accurate Output Voltage Š Built-In 20V/2A, 0.
2Ω N-Channel MOSFET Š High Efficiency up to 90% Š Programmable Soft-Start Š Over-Current Protection Š Output Under-Voltage Protection „ High-Performance Operational Amplifiers ±150mA Output Short-Circuit Current Š 12V/µs Slew Rate Š 12MHz, -3dB Bandwidth Š Rail-to-Rail Input and Output „ On-Chip GPM Controller Š Adjustable Falling Time and Power-On Delay Š Flicker Compensator Š Power-On Sequence Control „ Low Voltage Detector Š Programmable Detecting Voltage and Delay Time „ Charge pump for VGH regulation „ Thermal-Overload Protection „ RoHs Compliant „ TQFN4X4-24 Package Applications „ LCD Monitor „ Notebook Computer Displays „ LCD TVs General Description The G5529 includes a high-performance boost regulator, a gate pulse modulator (GPM), a voltage detector, and a VCOM buffer (unity-gain OPA), for activematrix thin-film transistor (TFT) liquid-crystal displays (LCDs).
The boost converter provides the regulated supply volt- Pin Configuration age for the panel source driver ICs.
The converter is a high switching frequency (640kHz or 1.
2MHz) currentmode regulator with an integrated 20V N-Channel 0.
2Ω MOSFET that allows the use of ultra-small inductors and ceramic capacitors.
It provides fast transient response to pulsed loading while achieving efficiency over 90%.
The device can produce output voltage as high as 18V from an input as low as 2.
8V.
Soft-Start is programmed by external capacitor, which sets the input-current ramp-rate.
The GPM is controlled by frame signals from timing controller to modulate the Gate-On voltage, VGHM, which acts a flicker compensation circuit to reduce the coupling effect between gate lines and pixels.
It also can delay the Gate-On voltage while power-on for ac...


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