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參數(shù)資料
| 型號： | HDP01-0512NRL |
| 廠商： | 意法半導體 |
| 英文描述： | HARD DISK DRIVE POWER SUPPLY PROTECTION |
| 中文描述： | 硬盤驅(qū)動器電源保護 |
| 文件頁數(shù)： | 4/6頁 |
| 文件大小： | 86K |
| 代理商： | HDP01-0512NRL |
The HDP01-0512N has been specially designed to protect equipment supplied by both +5 and +12 Volt
power rails such as hard disk drives, CD-ROMs, DVDs, floppy disk drives with the topology indicated in
figure A.1.
This protection device is able to protect both +5 and
+12 Volts power rails against transients and rails in-
version.
The internal +5V protection is achieved with a crowbar
structure whereas the +12V one is secured by a
clamping structure.
ABOUT THE +5V PROTECTION
In normal conditions, (region
of figure A.2) the +5V protection (PL5 termination) of the HDP01-0512N
connected to the +5V rail, is in idle state and its leakage current is 1
μ
A max at +5V @ 25°C. Upon occur-
rence of transients, the HDP01-0512N eliminates the overvoltage by clamping up to a maximum of +7.4V
(region
) since the current induced by the transient does not exceed the activation current
A
min (10mA).
If the I
A
min current value is passed, the internal +5V protection trips in crowbar mode (region
) and then
a short circuit appears on the +5V rail .
The arrows indicate the way the device is activated
from point
to point
, and the way it goes back in
idle state, point
to point
Thanks to this behavior the electronic module (i.e.
disk drive) connected to the +5V rail is safe.
As soon as the transient disappears and assuming that the current in the +5V power supply rail is under the
holding current I
H
min value (10mA) of the +5V protection, the HDP01-0512N gets back in idle state and the
protected electronic module turns back on. As in many cases the current delivered by the +5V power supply
is higher than the I
H
min current value of the HDP01-0512N, it is necessary to use a serial protection on the
+5V rail (i.e. resettable fuse), connected before the HDP protection. This will prevent the HDP01-0512N
from being damaged by an over-rated dissipated power. The choice of the serial protector is led by both
peak current and current duration the HDP01-0512N is able to support. The serial protection shall fulfill the
next condition :
i
2
t serial protection < I
TSM
@ tp of +5V HDP protection.
APPLICATION INFORMATION
DESCRIPTION
Fig. A.1:
typical application schematic.
+5V supply rail
+12V supply rail
EMODULE
(i.e. Disk drive)
H
O
E
O
D
Fig. A.2:
Current and voltage characteristic of the
+5V protection.
I
V
I
H
I
A
V
A
3
1
2
HDP01-0512N
4/6
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相關(guān)代理商/技術(shù)參數(shù) |
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| HDP126-1000-JBW | 制造商:RCD Components Inc 功能描述:HI DENS PWR RES 25W 100 OHM 5% BULK |
| HDP126-1001-JBW | 制造商:RCD Components Inc 功能描述:HI DENS PWR RES 25W 1.0K 5% BULK |
| HDP126-1002-JBW | 制造商:RCD Components Inc 功能描述:HI DENS PWR RES 25W 10K 5% BULK |
| HDP126-10R0-JBW | 制造商:RCD Components Inc 功能描述:HI DENS PWR RES 25W 10 OHM 5% BULK |
| HDP126-1100-JBW | 制造商:RCD Components Inc 功能描述:HI DENS PWR RES 25W 110 OHM 5% BULK |
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