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參數資料
| 型號： | MBI5168CDW |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | 8-bit Constant Current LED Sink Driver |
| 中文描述： | 8位恒流LED驅動器 |
| 文件頁數： | 13/15頁 |
| 文件大小： | 269K |
| 代理商： | MBI5168CDW |
MBI5168
8-bit Constant Current LED Sink Driver
September
2003, V0.3
- 13 -
The maximum power dissipation, P
D
(max) = (Tj
–
Ta) / R
th(j-a)
, decreases as the ambient temperature increases.
Max. Power Dissipation at Various Ambient Temperature
0.50
0.75
1.00
1.25
1.50
1.75
2.00
2.25
2.50
10
20
30
40
50
60
70
80
90
Ambient Temperature
P
CN Type: Rth= 61.65
CD Type: Rth= 85.82
CDW Type: Rth=61.63
CP Type: Rth= 72.43
Load Supply Voltage (V
LED
)
MBI5168 are designed to operate with V
DS
ranging from 0.4V to 1.0V considering the package power dissipating
limits. V
DS
may be so high as to make P
D(act)
> P
D(max)
under higher V
LED
, for instance, than 5V, where V
DS
= V
LED
–
Vf and V
LED
is the load supply voltage. In this case, it is recommended to use the lowest possible supply voltage or
to set an external voltage reducer, V
DROP
.
A voltage reducer lets V
DS
= (V
LED
–
Vf)
–
V
DROP
.
Resistors or Zener diode can be used in the applications as shown in the following figures.
V
LED
V
DROP
Vf
V
DS
MBI5168
V
LED
V
DROP
Vf
V
DS
MBI5168
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