S1F76680 Epson Electronics America, Inc., S1F76680 Datasheet - Page 14

• Manufacturer Part Number: S1F76680
• Description: Led Driver
• Manufacturer: Epson Electronics America, Inc.

7. OPERATIONAL AND FUNCTIONAL DESCRIPTION
[3] Selection of the change time of the automatic luminance control current
10
S1F76680 judges brightness at every sampling cycle and then automatically changes LED current so that it
may correspond to the brightness.
When the automatic luminescence control is turned on, LED current value changes in a unit of 1/127 of
ILEDmax.
You can set the current change time from the 1AH at an address (to be described later) of I
Independent setup is available for the increased current (TUP) and decreased current (TDW).
Waveform of LED current changes in the automatic luminescence control
Current change time selection register used in the automatic luminescence control
Current change time setting table
ILED
Address
selection
1AH
State of
10
11
12
13
14
15
0
1
2
3
4
5
6
7
8
9
ILED Max. × 1/127
Initial value
Register
name
Item
R/W
TDW3
TUP3
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
Change time 4-bit register setting
TDW3
R/W
D7
TUP
0
TDW2
TUP2
TDW setting register
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
TDW2
R/W
D6
1
TDW1
TUP1
EPSON
TDW1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
R/W
D5
1
TDW0
TDW0
TUP0
R/W
D4
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
1
Register
TUP3
R/W
TDW
D3
0
163.84
327.68
655.36
Change time (Unit)
10.24
20.48
40.96
81.92
10.48
0.32
0.64
1.28
2.56
5.12
1.31
2.62
5.24
TUP setting register
S1F76680 Technical Manual (Rev.1.22)
TUP2
R/W
D2
1
msec
msec
msec
msec
msec
msec
msec
msec
msec
msec
msec
msec
sec
sec
sec
sec
TUP1
R/W
D1
0
TUP0
TDW initial value
R/W
TUP initial value
D0
1
Remarks
Remarks
2
C-Bus.
-