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
L...