Datasheet
NT7603
18 V2.3
(4) Bias Power Connection
NT7603 provides 1/4 or 1/5 bias for various duty cycle applications. The built-in power division resistor divide voltage is
described in the following table. The division resistor is the connection of the NT7603, power supply, and resistors are also
shown as follows:
Power Division 1/8, 1/11 Duty Cycle - 1/4 Bias 1/16 Duty Cycle - 1/5 Bias
V1 VDD - 1/4 VLCD VDD - 1/5 VLCD
V2 VDD - 1/2 VLCD VDD - 2/5 VLCD
V
3
V
DD
- 1/2 V
LCD
V
DD
- 3/5 V
LCD
V
4
V
DD
- 3/4 V
LCD
V
DD
- 4/5 V
LCD
V
5
V
DD
- V
LCD
V
DD
- V
LCD
The bias is auto selected by 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 then select the division resistor value:
OPT_R1 OPT_R0 Division Resister
No ITO (1) No ITO (1)
2.2K
Ω
No ITO (1) ITO On (0)
4K
Ω
ITO On (0) No ITO (1)
6.8K
Ω
ITO On (0) No ITO (0)
No built-in resister
(external input)
NT7603
V
DD
V
1
V
2
V
3
V
4
V
5
V
DD
VR
GND
V
LCD
Built-in bias resister
2.2K,4K or 6.8K ohm.
NT7603
V
DD
V
1
V
2
V
3
V
4
V
5
VR
GND
V
DD
R
R
R
R
V
LCD
V
DD
V
1
V
2
V
3
V
4
V
5
VR
V
DD
R
R
R
R
R
V
LCD
Exit Power division. (The resistance value depends on the LCD panel size)
GND
NT7603