Charge Pump Regulator & Com Driver For Color Tft Panel - Analog Devices

The ADM8840 combines a Charge Pump Regulator and a Common Line (COM) driver in a single chip solution for use in TFT LCDs The device provides an LCD Controller and grayscale DAC supply voltage of 5.0V (2%), 2 Gate drive voltages of +15V and -15V and a COM driver voltage. This COM Driver voltage alternates the polarity of the Common line voltage every line (or every frame) on the Display in order to prevent screen-burn occuring over time. The ADM8840 is powered by a single 3.0V supply. The ADM8840 has an internal 100KHz Oscillator for driving the Charge Pumps The COM Driver section of the ADM8840 CAN be used to generate the alternate frame or line inversion of the COM line of the LCD panel. The ADM8840 receives the COM Clock from the controller with a frequency up to 10kHz and allows programmable conditioning of its amplitude and centre voltage through the use of on-board DACs This allows programmable elimination of Display flicker caused by the COM inversion. The COM_OUT amplitude CAN be programmed from 4.0V to 7.0V in steps of 28mV. The COM_OUT centre voltage CAN be programmed to 0.9V to 2.8V in steps of 14mV. By Analog Devices, Inc.
ADM8840 's PackagesADM8840 's pdf datasheet
ADM8840ACP




ADM8840 Pinout, Pinouts
ADM8840 pinout,Pin out
This is one package pinout of ADM8840,If you need more pinouts please download ADM8840's pdf datasheet.

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