點晶科技股份有限公司
ST2225A
SILICON TOUCH TECHNOLOGY INC.
37
1
36
CLOCK
START BIT 1
BIT 34 BIT 35
DATA
LOAD
(INTERNAL)
RESET
Figure 5 Input Data Format
Output Current v.s. Number of Segments
Vout v.s. ILED
180
160
140
120
100
80
3.00
2.50
2.00
1.50
1.00
0.50
0.00
Ta = 85℃
Ta = 85℃
Tj = 150℃ (max.)
Vout = 1V
20 SEGM
Vout = 1.5V
30 SEGM
Vout = 2V
35 SEGM
60
40
20
0
0
2
4
6
8
10 12 14 16 18 20 22 24 26 28 30 32 34
Figure 6 Number of Segments
5
7
9
11 13 15 17 19 21 23 25 27 29 31 33 35
Figure 7 ILED (mA)
Power dissipation v.s. Temperature
2.0
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0.0
35 Segments
Vout = 1V
15 mA/Segment
Safe Operating
Area
0
5
10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85
Figure 8 Temp('C)
LED Display Driver
-8-
Version：A.025
SITI [ SILICON TOUCH TECHNOLOGY INC. ]
