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.
l 2.5V to 5.5V input supply
l Active-high Enable Control
l 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%)
l VGH positive charge pump
l VGL negative charge pump
l Integrated unity-gain Vcom buffer
- ±150mA output current limit
- 12V/us slew rate
- 12MHz Bandwidth
l Low-voltage detection circuit
l Soft-start and timed delay fault latch for all outputs
l Thermal shutdown
l Thin 3x3 mm 16-lead WQFN package
QFN-16 PIN CONFIGURATION
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TYPICAL APPLICATION CIRCUIT
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