ST7628
7.9.1 Voltage Regulator Circuits
SET V0 (Temperature = 24℃)
V0=a+{Vop[8:0] + VopOffset[8:0]+ (EV[6:0]-3Fh)}xb (V)
Example:
Vop[8:0]=011010010
VopOffset[8:0]=000000011
EV[6:0]=0111111
V0=3.6 + ( 210 + 3 + (63-63) ) x 0.04 =12.12 (V)
ꢀ
ꢀ
ꢀ
ꢀ
a is a fixed constant value (seeTable 7.9.1).
b is a fixed constant value (seeTable 7.9.1).
Vop [8:0] is the programmed VOP value. The programming range for Vop[8:0] is 5 to 410 (19Ahex).
The range of contrast is 128 steps for fine tuning VOP.
Table 7.9.1
SYMBOL
VALUE
UNIT
a
b
3.6
V
0.04
V
Ver 1.4
50/213
2008/08