ST8016T Просмотр технического описания (PDF) - Sitronix Technology Co., Ltd.

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производитель

ST8016T

COM/SEG LCD Driver

Sitronix Technology Co., Ltd. 

ST8016T

8

PRECAUTIONS

Precautions when connecting or disconnecting the power supply

This IC has a high-voltage LCD driver, so a high current that may flow if voltage is supplied to the LCD

drive power supply while the logic system power supply is floating may permanently damage it. The

details are as follows,

n When connecting the power supply, connect the LCD drive power after connecting the logic system

power. Furthermore, when disconnecting the power, disconnect the logic system power after

disconnecting the LCD drive power

n It is advisable to connect the serial resistor (4.7Ω to 50Ω ) or fuse to the LCD drive power V0 of the

system as a current limiter. Set up a suitable value of the resistor in consideration of the display grade.

And when connecting the logic power supply, the logic condition of this IC inside is insecure. Therefore

connect the LCD drive power supply after resetting logic condition of this IC inside on /DISPOFF

function. After that, cancel the /DISPOFF function after the LCD drive power supply has become stable.

Furthermore, when disconnecting the power, set the LCD drive output pins to level LGND on /DISPOFF

function. Then disconnect the logic system power after disconnecting the LCD drive power.

When connecting the power supply, follow the recommended sequence shown here

VDD

VDD

LGND

VDD

/DISPOFF

LGND

V0

V0

GND

.

Preliminary Ver 0.12

Page 15/27

2007/10/29

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