HD66710 Datasheet, PDF (70/73 Pages) Hitachi Semiconductor – (Dot Matrix Liquid Crystal Display Controller/Driver)

HD66710
19. Reference data
The following graphs show the liquid crystal voltage booster characteristics.
VUP2 = V_CC–V5OUT2
VUP3 = V_CC–V5OUT3
(1) VUP2, VUP3 vs Vci
11
10
9
8
7
6
5
4
2.0
Boosting twice
typ.
3.0 4.0 5.0
Vci (V)
Boosting three times
15
typ.
14
13
12
11
10
9
8
7
6
2.0 3.0 4.0 5.0
Vci (V)
Test condition: Vci = V_CC, f_cp = 270 kHz
T_a = 25°C, Rload = 25 kΩ
Test condition: Vci = V_CC, f_cp = 270 kHz
Ta = 25°C, Rload = 25 kΩ
(2) VUP2, VUP3 vs I_o
Boosting twice
9.0
8.5
typ.
8.0
min.
7.5
7.0
6.5
6.0
0.0 0.5 1.0 1.5 2.0
I_o (mA)
Test condition: Vci = V_CC = 4.5V
R_f = 91 kΩ, T_a = 25°C
(3) VUP2, VUP3 vs T_a
Boosting twice
9.0
typ.
8.5
min.
8.0
7.5
7.0
–60 –20 0 20 60 100
T_a (°C)
Test condition: Vci = V_CC = 4.5V
R_f = 91 kΩ, I_o = 0.25 mA
Boosting three times
8.0
7.5
7.0
6.5
typ.
6.0
min.
5.5
5.0
0.0 0.5 1.0 1.5 2.0
I_o (mA)
Test condition: Vci = V_CC = 2.7V
R_f = 75 kΩ, T_a = 25°C
Boosting three times
8.0
typ.
7.5
min.
7.0
6.5
6.0
–60 –20 0 20 60 100
T_a (°C)
Test condition: Vci = V_CC = 2.7V
R_f = 75 kΩ, I_o = 0.25 mA
360