SL20T0081 System Logic Semiconductor, SL20T0081 Datasheet - Page 27

• Manufacturer Part Number: SL20T0081
• Description: SLS System Logic Semiconductor
• Manufacturer: System Logic Semiconductor

SLS System Logic Semiconductor
In Case of Using External Resistors, Ra and Rb (INTRS =“L”)
between V0 and VR.
Table 12. V0 Depending on Electronic Volume Level
When INTRS pin is “L”, it is necessary to connect external regulator resistor Ra between VR and VSS, and Rb
Example : For the following requirements
1. LCD driver voltage, V0 = 10V
2. 6-bit reference voltage register = (1, 0, 0, 0, 0, 0)
3. Maximum current flowing Ra, Rb = 1uA
From equations Eq.3, 4 and 5
Ra
Rb
The following table shows the range of V0 depending on the above requirements.
From Eq.1 and Eq.2
10 = ( 1 +
V
From requirement 3
Ra + Rb
EV
V0
10
= ( 1 -
1.69 [M ]
8.31 [M ]
= 1 [uA]
Rb
Ra
(63 -32 )
162
) x V
7.57
0
EV
) x 2.1 1.698 [V]
[V]
… ...
… ...
Electronic volume level
(Eq.3)
(Eq.4)
(Eq.5)
10.00
32
… ...
… ...
12.43
63
SL20T0081