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參數(shù)資料
| 型號(hào)： | SSP-21116-005-B |
| 英文描述： | Power Control/Management |
| 中文描述： | 電源控制/管理 |
| 文件頁數(shù)： | 5/8頁 |
| 文件大小： | 80K |
| 代理商： | SSP-21116-005-B |
2) The SSPC has failed. STATUS 1 indicates the load is
drawing current; STATUS 2 indicates the Power MOSFET
switch is on; the SSPC should be off.
3) Normal off condition. STATUS 1 indicates the load is not
drawing current; STATUS 2 indicates the Power MOSFET
switch is off.
4) The SSPC has failed or STATUS 2 has shorted to the bias
supply. STATUS 1 indicates the load is not drawing current;
STATUS 2 indicates the Power MOSFET is on ; the SSPC
should be off. Also this status is generated if POWER IN is
lost.
The next four conditions show the control input has commanded
the SSPC to be on.
5) The SSPC has failed or there is a short to ground on the
STATUS 2 output. STATUS 1 indicates the load is drawing
current but STATUS 2 indicates the Power MOSFET switch
is off.
6) Normal on condition. STATUS 1 indicates the load is
drawing current and STATUS 2 indicates the Power MOS-
FET switch is on.
7) Tripped condition. STATUS 1 indicates the load is not
drawing current and STATUS 2 indicates the Power MOS-
FET switch if off. The SSPC can be turned back on by
cycling the input control to a logic low and then back to a
logic high. If the excessive load has not been removed, the
SSPC will trip again.
8) No load current. STATUS 1 indicates the load is not draw-
ing current; STATUS 2 indicates the Power MOSFET switch
is on. Also this status is generated if POWER IN is lost.
PRECAUTIONS
When a short circuit causes turn off of the SSPC, precautions
have to be taken to limit the transient voltages generated by the
wire inductance. The magnitude of this voltage is L
di/dt where
"L" is the wire inductance in Henries and "di/dt" is the rate of
change of output current. If the SSPC turns off in 10 μsec from
a 250 amp overload (300% for 80 amp unit) with a wire induc-
tance of only 10 μH it would generate a spike of 250 volts. This
exceeds the voltage rating of the MOSFETs. In order to provide
protection from these transients, transient voltage suppressors
should be used between the SSPC Neutral and the Power In and
between the SSPC Neutral and Power Out terminals. The rating
of the transient voltage suppressors should be selected so that
at the maximum expected short-circuit current, the transient volt-
age suppressor voltage drop would not exceed the SSPC volt-
age rating, and the power to be dissipated can be safely
absorbed without transient suppressor failure.
While circuit inductance can cause high voltage transients dur-
ing turn off, lack of circuit inductance can cause current tran-
sients prior to turn off. If the output of the SSPC is shorted and
there is no circuit inductance, the current from the source can
rise instantaneously to a high value. The SSPC will limit the cur-
rent to about 100 times its rating (10,000%). Circuit inductance
will limit the rate of rise of this current. The SSPC can take
25 μs to turn off. The current will always overshoot the 1500%
maximum level of the SSPC due to this 25 μs delay. If the cur-
rent rises slowly due to circuit inductance, the overshoot will be
negligible; if the current rises quickly, the overshoot will be more
significant. In any case, the current spike will be less than 25 μs.
In most real applications, there will always be significant circuit
inductance. The problem to guard against is voltage transients,
not current transients. When testing individual SSPCs, be care-
ful to simulate actual system conditions.
POWER-ON RESET
When the POWER IN is first applied, the SSPC will be "off"
regardless of the CONTROL CMD input. When the CONTROL
CMD input is a logic low, the SSPC can be turned "on" by bring-
ing the CONTROL CMD to a logic high. If the CONTROL CMD
input is at a logic high when power is applied, the SSPC may be
turned "on" by cycling the CONTROL CMD input to a logic low
and then to a logic high. The system controller can be pro-
grammed to do this cycling of the CONTROL CMD input.
Subsequent loss of the POWER IN causes the SSPC to turn
"off". Re-application of the POWER IN again causes a power-on
reset. Loss of power to the BIAS SUPPLY INPUT terminals does
not turn "off" the SSPC and re-application of this power does not
cause a power-on reset.
STATUS CODES
This section contains a fuller explanation of the conditions and
meaning of the status codes shown in TABLE 5. Each paragraph
number corresponds to the STATE in TABLE 5.
The first four conditions show the control input has commanded
the SSPC to be off.
1) The SSPC has failed. STATUS 1 indicates the load is
drawing current but the SSPC should be off.
5
TABLE 5
OUTPUT
STATUS 2
(see note 3)
STATE
INPUT
CONTROL
CMD
L
1
L
L
SSPC failure.
Load
“
on,
”
showing
SSPC failure.
2
L
L
H
3
L
H
L
Load
“
off
”
; showing nor-
mal
“
off
”
condition.
SSPC failure or STATUS
2 shorted to bias supply
or POWER IN lost.
SSPC failure or short to
ground on STATUS 2
line.
4
L
H
H
5
H
L
L
6
H
L
H
Load
“
on
”
showing nor-
mal
“
on
”
condition.
Load
“
off
”
; showing
“
trip
”
(see note 1).
7
H
H
L
8
H
H
H
Normal power out with
load < 5% of rated
SSPC current or
POWER IN lost.
Notes:
1) Any trip condition per FIGURE 2.
2) STATUS 1 indicates a logic low with a normal load current condition.
(Less then 5% guarantees a logic high; more then 15% guarantees a logic low.)
3) STATUS 2 indicates a logic high when the Power MOSFET switch is on.
OUTPUT
STATUS 1
(see note 2)
POWER CONTROLLER
AND LOAD STATUS
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| SSP-21116-010 | 1.0UF 10% 50V RADIAL MMK5 FILM CAP |
| SSP-21116-010-883B | 2.2UF X2 275VAC 20% METAL FILM |
| SSP-21116-010-B | 4.7NF@250AC RAD .4 L/S |
| SSP-21116-015 | CAP PME271Y510M EVOX RIFA 1 |
| SSP-21116-015-883B | Power Control/Management |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| SSP-21116-010 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Power Control/Management |
| SSP-21116-010-883B | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Power Control/Management |
| SSP-21116-010-B | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Power Control/Management |
| SSP-21116-015 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Power Control/Management |
| SSP-21116-015-883B | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Power Control/Management |
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