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參數(shù)資料
| 型號： | APL5901-13KC |
| 廠商： | Anpec Electronics Corporation |
| 英文描述： | Low IQ, Low Dropout 900mA Fixed Voltage Regulator |
| 中文描述： | 低智商，低壓差穩(wěn)壓器九〇 〇毫安固定 |
| 文件頁數(shù)： | 11/21頁 |
| 文件大?。?/td> | 615K |
| 代理商： | APL5901-13KC |
Copyright
ANPEC Electronics Corp.
Rev. B.2 - May., 2005
APL5901/ 2
www.anpec.com.tw
11
Thermal protection limits total power dissipation in the
device. When the junction temperature exceeds
T
J
=+150
, the thermal sensor generates a logic sig-
nal to turn off the pass transistor and allows IC to
cool. When the IC’s junction temperature is down by
10
, the thermal sensor will turn the pass transistor
on again, resulting in a pulsed output during continu-
ous thermal protection. Thermal protection is designed
to protect the APL5901/2 in the event of fault
conditions. For continuous operation, do not exceed
the absolute maximum junction temperature of
T
J
=+150
.
Operating Region and Power Dis-
sipation
The thermal resistance of the case to circuit board,
and the rate of air flow all control the APL5901/2’s
maximum power dissipation. The power dissipation
across the device is P
D
= I
OUT
(V
IN
-V
OUT
) and the maxi-
mum power dissipation is:
P
DMAX
= (T
J
-T
A
) / (
where T
J
-T
A
is the temperature difference between the
junction and ambient air,
tance of the package, and
tance through the printed circuit board, copper traces,
and other materials to the ambient air.
The GND pin of the APL5901 provide an electrical con-
nection to ground and channeling heat away. If power
dissipation is large, connect the GND pin to ground
using a large pad or ground plane, can improve the
problem of over heat of IC.
JC
+
CA
)
JC
is the thermal resis-
CA
is the thermal resis-
T hermal Protec tion
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