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參數(shù)資料
| 型號： | SSP-21110-002-883B |
| 英文描述： | Power Control/Management |
| 中文描述： | 電源控制/管理 |
| 文件頁數(shù)： | 4/8頁 |
| 文件大?。?/td> | 80K |
| 代理商： | SSP-21110-002-883B |
When the SSPC turns off under these fault conditions, the fall
time is less than 25 μs. While the SSPC will always turn off in
less than 25 μs when the load current is greater than 1500%, the
actual current may
“
spike
”
to a value higher than 1500% due to
circuit delays. The MOSFETs inherently self-limit the maximum
current, depending on the number of MOSFETs and their rating.
During turn-on and turn-off the rise and fall time of the output
voltage is controlled to be less than 200 μs. This value is a com-
promise between faster response time with a greater amount of
RFI and EMI generated, and slower response time with less RFI
and EMI but greater power dissipated in the SSPC during transi-
tions. Since the Power MOSFET switches are not saturated dur-
ing transitions, the switching power dissipation is much greater
than the static dissipation, and longer transitions result in a larg-
er temperature rise. If the SSPC is rapidly turned on and off, the
high average dissipation could result in a significant temperature
rise in the SSPC. For this reason, do not turn the SSPC off and
on more rapidly than 30 msec. This will limit the maximum tem-
perature of the switches to a safe level.
The SSP-21120 has been designed to derive its internal power
requirements from the bias supply input (5 Vdc).
APPLICATIONS INFORMATION
SELECTION
The selection of a proper sized SSPC is essential for protection
of the wire and load. This selection should be based on the
steady-state and transient overload currents.
The shape of the trip curve (I
2
T) is selected as optimum to pro-
tect the system wiring. The power dissipated in the wire is the
wire resistance times the load current squared, and the temper-
ature of the wire is determined by the length of time that this
power is being dissipated. This makes the wire temperature pro-
portional to the current squared times the on time. Since the trip
curve follows this same characteristic the SSPC can accurately
predict the wire temperature rise as a result of overloads and
remove load current before the wiring is damaged from overtem-
perature. Of course, the wire I
2
T product should be greater than
the SSPC I
2
T product for the SSPC to protect the wire.
4
CONTROL INPUT
LOAD CURRENT
TRIP POINT
STATUS 2
STATUS 1
T1
T2 T3 T4 T5
T6
T7
T8 T9
T10
T11 T12
T13
SOLID-STATE POWER CONTROLLER TIMING AT 28 Vdc.
DESCRIPTION
TURN-ON DELAY
CURRENT RISE TIME
STATUS 1 & STATUS 2 TURN-ON DELAY
STATUS 1 & STATUS 2 RISE AND FALL TIME
TRUN-OFF DELAY
CURRENT FALL TIME
STATUS 1 & STATUS 2 TURN-OFF DELAY
TRIP TIME AFTER TURN ON
CURRENT FALL TIME AFTER TRIP
CURRENT FALL TIME AFTER TRIP
TRIP TURN-OFF STATUS 1 DELAY
FIGURE 3. SOLID-STATE POWER CONTROLLER TIMING
TIME
T1-T2
T2-T3
T1-T4
T4-T5
T6-T7
T7-T8
T6-T9
T10-T11
T11-T12
T11-T12
T11-T13
MAXIMUM
150
200
7.5
350
130
200
5.0
SEE FIG. 2
200
25
5.0
UNIT
μ
s
μ
s
ms
ns
μ
s
μ
s
ms
s
μ
s
μ
s
ms
NOTES
LOAD CURRENT < 600%
LOAD CURRENT > 1000%
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| SSP-21110-002-B | Power Control/Management |
| SSP-21110-007 | Power Control/Management |
| SSP-21110-007-883B | Power Control/Management |
| SSP-21110-007-B | Power Control/Management |
| SSP-21110-015 | Power Control/Management |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| SSP-21110-002-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-21110-007 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Power Control/Management |
| SSP-21110-007-883B | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Power Control/Management |
| SSP-21110-007-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-21110-015 | 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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