ANX6623

ANX6623

应用

TFT LCD for Notebooks
Tablet Personal Computer Display
Car Navigation Display
Portable equipment

DESCRIPTION

     The ANX6623 is an integrated power supply solution optimized for small to medium size thin-film transistor (TFT) liquid crystal displays (LCD’s).

The boost converter operates at a fixed frequency of 1.2MHz. The integrated N-channel FET has a current limit of 1.8A.

     The positive and negative charge pumps provide regulated TFT LCD gate-on and gate-off supplies. Both outputs can be adjusted by external resistive voltage dividers.

     The integrated operational amplifier is typically used for LCD Vcom driving; the output can sink or source up to 150mA short-circuit current. 

     A built-in voltage detector generates a reset signal when the input voltage drops below 2.6V. The reset signal is active low and has a 123ms blanking time during power-on.

     The ANX6623 is available in a thin 16-pin 3x3 mm WQFN green package.

FEATURES

2.5V to 5.5V input supply

Active-high Enable Control

Current-mode boost regulator

         - 1.2MHz switching frequency

         - Integrated 20V/1.8A 700mΩ FET

         - Fast transient response to pulsed load

         - High efficiency up to 90%

         - Adjustable high-accuracy output voltage(±1%)

VGH positive charge pump

VGL negative charge pump

Integrated unity-gain Vcom buffer

         - ±150mA output current limit

         - 12V/us slew rate

         - 12MHz Bandwidth

Low-voltage detection circuit

Soft-start and timed delay fault latch for all outputs

Thermal shutdown

Thin 3x3 mm 16-lead WQFN package 

QFN-16 PIN CONFIGURATION
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ORDERING INFORMATION 

Part NumberPackage

ANX6623AAQ

WQFN-16L, 3x3

TYPICAL APPLICATION CIRCUIT

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