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ADM8840 - Charge Pump Regulator & COM Driver for Color TFT Panel

Description

The ADM8840 combines a charge pump regulator and a Common Line (COM) driver in a single chip solution for use in TFT LCD’s.

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.

Features

  • Programmable COM Driver to prevent Screen-Burn 3 Voltages (5.0V,15.0V,-15.0V) from one 3V Supply Power Efficiency optimised for use with TFT in mobile phones Low Quiescent Current Low Shutdown Current (.

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Datasheet Details

Part number ADM8840
Manufacturer Analog Devices
File Size 166.07 KB
Description Charge Pump Regulator & COM Driver for Color TFT Panel
Datasheet download datasheet ADM8840 Datasheet

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Full PDF Text Transcription

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PRELIMINARY TECHNICAL DATA a Charge Pump Regulator & COM Driver for Color TFT Panel ADM8840 Preliminary Technical Data FUNCTIONAL BLOCK DIAGRAM -15V FEATURES Programmable COM Driver to prevent Screen-Burn 3 Voltages (5.0V,15.0V,-15.0V) from one 3V Supply Power Efficiency optimised for use with TFT in mobile phones Low Quiescent Current Low Shutdown Current (<5uA) Shutdown Function APPLICATIONS Handheld Instruments TFT LCD Panels Cellular Phones VOLTAGE INVERTER C4+ C4 0.22 ␮F C9 0.22 ␮ F C4- ADM8840 TRIPLE VOLTAGE TRIPLER DOUBLE +15V C2+ C2 0.22 ␮F C8 0.22 ␮ F C2C3+ C3 0.22 ␮ F C3- OSCILLATOR TIMING GENERATOR 5VIN +5V 5VOUT SHDN C7 2.2 ␮ F SHUTDOWN CONTROL DISCHARGE LDO VOLTAGE REGULATOR VOUT C1+ C6 4.7␮ F CONTROL LOGIC VOLTAGE DOUBLER C1- C1 3.3 ␮F C10 3.
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