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参数资料
| 型号： | DM115 |
| 厂商： | Electronic Theatre Controls, Inc. |
| 元件分类： | LED驱动器 |
| 英文描述： | 8-Bit CONSTANT CURRENT LED DRIVERS with 3.3v ~ 5v supply voltage |
| 中文描述： | 8位恒流LED驱动与3.3V?5V电源电压 |
| 文件页数： | 4/17页 |
| 文件大小： | 232K |
| 代理商： | DM115 |
DM114
、DM115
點晶科技股份有限公司
SILICON TOUCH TECHNOLOGY INC.
8-BIT CONSTANT CURRENT LED DRIVERS with 3.3V~5V supply voltage
Version:A.002
Page 11
Preliminary
Note
As the power dissipation of a semiconductor chip is limited its package and ambient temperature,
this device requires a maximum output current be calculated for a given operating condition. The
maximum allowable power consumption (Pd (max)) of this device is calculated as follows:
)
/
(
Rth
)
)(
)
emperature
(ambient t
Ta
-
(max)
e)
temperatur
(junction
(Tj
)
(max)(
Watt
C
Watt
Pd
°
=
Based on the Pd (max), the maximum allowable current can be calculated as follows:
Iout = ( Pd – VDDIDD) / ( # outputsVoDuty )
Imax - Ta ( DM115 )
0
10
20
30
40
50
60
70
0
20
40
60
80
100
120
140
160
Ta
Imax
(mA)
Imax - Ta ( DM114 )
0
10
20
30
40
50
60
70
80
90
100
0
20
40
60
80
100
120
140
160
Ta
Imax
(mA)
Pd - Ta
0.00
0.20
0.40
0.60
0.80
1.00
1.20
1.40
1.60
1.80
0
20
40
60
80
100
120
140
160
Ta
Pd
(W)
DIP
SOP
SSOP
DIP
SOP
SSOP
DIP
SOP
SSOP
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