Global Mixed-mode Technology
AT5517
Integrated Power Solution for TFT-LCD
Features
2.5V to 5.5V Input Supply Range ...
Global Mixed-mode Technology
AT5517
Integrated Power Solution for TFT-LCD
Features
2.5V to 5.5V Input Supply Range 1.2MHz Current-Mode Step-Up Converter Built-In 18V, 3A 0.2Ω n-Channel MOSFET Charge Pumps for VGON and VGOFF High Voltage Switch with Adjustable Delay Thermal Overload Protection TQFN4X4-24 Package
Applications
LCD Monitor Panels Notebook Computer Displays LCD TVs
General Description
The AT5517 includes a step-up converter, two charge pumps, and a high current operational amplifier for TFT LCD. Also included are a logic-controlled high-voltage switch with adjustable delay and an open drain output reset comparator.
The step-up DC/DC converter provides the regulated power supply for the panel source driver IC. The converter is a high performance current-mode
regulator with operating frequency at 1.2MHz. It also provides fast transient response and high efficiency.
The charge pumps in AT5517 regulate TFT gate-on and gate-off power supplies. ...