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參數(shù)資料
| 型號(hào)： | US431LCS |
| 廠商： | Unisem Group |
| 英文描述： | LOW -VOLTAGE ADJUSTABLE PRECISION SHUNT REGULATOR |
| 中文描述： | 低電壓調(diào)節(jié)精密并聯(lián)穩(wěn)壓器 |
| 文件頁(yè)數(shù)： | 5/6頁(yè) |
| 文件大小： | 37K |
| 代理商： | US431LCS |
US431L/431AL
2-5
Rev. 1.2
5/11/98
In our previous example, the maximum power dissipa-
tion of the device is calculated under no load and maxi-
mum input supply condition.
The maximum power is calculated using the following
equation :
As shown in the power dissipation table, both packages
can handle this power dissipation.
Stability
The US431L has many different regions of stability do-
main as a function of the cathode current which are typi-
cal characteristics of the 3 terminal shunt regulators.
However in general the device will be
unconditionaly
stable for any cathode current if the capacitor, C
O
=
1 uF or bigger
is connected from Cathode to Anode
pins. If the cathode current is always kept higher than
500uA under minimum line and maximum load condi-
tions , the C
O
can be cut to 0.01uF and the system will
be stable.
P
V
V
Where :
P
MAX
For our example :
P
MAX
KA
MAX
MAX
=
×
=
=
×
=
- V
R
B
Maximum power dissipation of the 431L
- 3.3
100
mW
KA
33
.
6
89
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