NT7605 データシートの表示（PDF） - Novatek Microelectronics
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NT7605 Datasheet PDF : 32 Pages
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(3) Bias Power Connection
NT7605
NT7605 provides 1/4 or 1/5 bias for various duty cycle applications. The built-in power division resister divide voltage is
described in the following table. The connection of NT7605, power supply, and resistors are also shown as follows:
Power Division
V1
V2
V3
V4
V5
1/8, 1/11 Duty Cycle - 1/4 Bias
VDD - 1/4 VLCD
VDD - 1/2 VLCD
VDD - 1/2 VLCD
VDD - 3/4 VLCD
VDD - VLCD
1/16 Duty Cycle - 1/5 Bias
VDD - 1/5 VLCD
VDD - 2/5 VLCD
VDD - 3/5 VLCD
VDD - 4/5 VLCD
VDD - VLCD
The bias is auto selected by the duty cycle. When the LCD is set to 1/16 duty, the bias is set to 1/5. Otherwise, the bias is set to
1/4.
The ITO Option can select the division resister value:
OPT_R1
OPT_R0
Division Resister
VDD
VDD
No ITO (1)
No ITO (1)
ITO On (0)
No ITO (1)
ITO On (0)
No ITO (1)
2.2KΩ
4KΩ
6.8KΩ
V1
NT7605 V2
V3
V4
VLCD
Built-in bias resister
2.2K, 4K or 6.8K ohm
ITO On (0)
No ITO (0)
No built-in resister
(external input)
V5
VR
GND
VDD
V1
V2
NT7605
V3
V4
V5
VDD
R
R
VLCD
R
R
VR
GND
VDD
V1
V2
NT7605
V3
V4
V5
VDD
R
R
R VLCD
R
R
VR
GND
Exit Power division. (The resistance value depends on the LCD panel size)
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