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NTC Block Function
NTC Block is the function to adjust VGH, VCOM voltage depending on NTC pin voltage.
NTC pin will output 40
μA (Typ) current.
Connecting thermistor element can perform temperature adjustment function.
Below functions can be set by EEPROM.
VGH NTC Enable (Register Address 02h )
VGH Block NTC Function can be changed to Enable or Disable.
VCOM NTC Enable (Register Address 05h )
VCOM Block NTC Function can be changed to Enable or Disable.
Pin connection when NTC is not used.
When NTC function is not used, connect NTC pin to OPEN.
EN Block Function
When inserting resistor to EN terminal, EN threshold voltage is decided by resistance division with internal resistor.
Threshold Voltage calculation;
EN threshold voltage high typical ( VENH ) = 0.9/300x (400+Rup) [V]
EN threshold voltage low typical ( VENL )
= 0.9/500x (600+Rup) [V]
The EN threshold voltage including unevenness is as follows;
Figure 101. NTC Block Diagram
Figure 102. EN Block Diagram