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參數(shù)資料
| 型號： | PIP401 |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 外設(shè)及接口 |
| 英文描述： | OR-ing Intelligent Switch |
| 中文描述： | 400 A BUF OR INV BASED PRPHL DRVR, PSSO6 |
| 封裝： | PLASTIC, SOT-427, D2PAK-7 |
| 文件頁數(shù)： | 11/16頁 |
| 文件大?。?/td> | 272K |
| 代理商： | PIP401 |
Philips Semiconductors
PIP401
OR-ing Intelligent Switch
Product data
Rev. 03 — 5 November 2002
11 of 16
9397 750 10578
Koninklijke Philips Electronics N.V. 2002. All rights reserved.
11.3 Overtemperature detection
Figure 8
shows how the thermal flag output of the PIP401 is used to shut down a
power supply in the event of overtemperature. In this circuit, there are pull-up
resistors from TFL to both the 5 V and 12 V supplies.
11.3.1
On-state
The overtemperature flag can be used to detect excessive load current. The
overtemperature flag will operate when the power dissipation due to load current is
sufficient to raise the junction temperature to approximately 160
°
C. The typical
on-state voltage of the PIP401 at 25
°
C is 70 mV. To calculate the on-state voltage at
160
°
C, the 25
°
C value is multiplied by the normalized on-state voltage factor given
in
Figure 6
. This factor is 1.6 giving an on-state voltage at 160
°
C of 112 mV. Using a
thermal resistance from junction to ambient of 15 K/W and an ambient temperature of
55
°
C, the overtemperature flag will operate when the current exceeds:
(1)
One possible use of the overtemperature flag is to detect failure of the cooling fan, in
applications where forced air cooling is used.
If the thermal resistance from junction to ambient is higher, then the temperature flag
will operate at a lower value of output current.
11.3.2
Off-state
If the 12 V supply to V
CC
fails as a result of a fault in the auxiliary supply, this will
cause the PIP401 to turn off, and the voltage drop to increase from a few millivolts to
approximately 0.7 V. The increased dissipation in the PIP401 will cause its junction
temperature to rise. Taking a junction to ambient thermal resistance of 15 K/W and an
ambient temperature of 55
°
C, the overtemperature flag will operate when the
dissipation in the PIP401 is greater than:
(2)
Fig 8.
Overtemperature detection.
VCC
VRS
GND
LOAD
03ah74
5 V
SUPPLY
shutdown
12 V
SUPPLY
VO
VI
2.2
k
1
k
TFL
I
O
T
V
ON
R
th j
a
–
(
)
-----------------------------------------
0.112
15
-------------------------
62.5A
=
=
=
P
tot
--------------------
15
7W
=
=
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| PIP401,118 | 功能描述:電源開關(guān) IC - 配電 OR-ING INTELIGENT SW RoHS:否 制造商:Exar 輸出端數(shù)量:1 開啟電阻（最大值）:85 mOhms 開啟時間（最大值）:400 us 關(guān)閉時間（最大值）:20 us 工作電源電壓:3.2 V to 6.5 V 電源電流（最大值）: 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOT-23-5 |
| PIP401 | 制造商:NXP Semiconductors 功能描述:IC MOSFET N SOT-427 |
| PIP401/T3 | 功能描述:電源開關(guān) IC - 配電 OR-ING INTELIGENT SW RoHS:否 制造商:Exar 輸出端數(shù)量:1 開啟電阻（最大值）:85 mOhms 開啟時間（最大值）:400 us 關(guān)閉時間（最大值）:20 us 工作電源電壓:3.2 V to 6.5 V 電源電流（最大值）: 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOT-23-5 |
| PIP440 | 制造商:ProTek Devices 功能描述:Diode TVS Single Bi-Dir 623V 15KW 2-Pin 制造商:Microsemi Corporation 功能描述:TVS SGL BI-DIR 623V 15KW 2PIN CASE 11 - Bulk |
| PIP46U | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Fibers can be free cut using fiber cutter |
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