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參數(shù)資料
| 型號： | VM-11918 |
| 元件分類： | 電源模塊 |
| 英文描述： | AC-DC REG PWR SUPPLY MODULE |
| 封裝： | MODULE-31 |
| 文件頁數(shù)： | 3/6頁 |
| 文件大小： | 969K |
| 代理商： | VM-11918 |
thinking inside the box
AC/DC CONVERTER VM - 11918
Remote Sense:
Fitted on the 5V and 3.3V outputs only and capable of
a maximum voltage offset of 100mV. If this feature is
not used then the 5V and 3.3V output will be
regulated at the output connector. Protection is
provided in the event of misconnection of the sense
lines.
Power Up:
From the application of input power all outputs shall
be within specification limits in less than 500ms. All
outputs rise monotonically and are sequenced. The
nominal power up order is 5V standby, +5V, +3V3
then ±12V. This sequence may be modified on
request.
Input Under Voltage Operation:
The PSU will not be damaged at inputs below 85Vms.
Operating Temperature:
Full specified performance with the card edge
temperature maintained within the range –55C to
+85C.
Cooling:
Conduction cooled through the coldwall surface, see
mechanical outline.
Hold Up:
4ms minimum at full load and any input voltage
within specified ranges. After 4ms (may be longer
dependant on the load) all outputs apart from the 5V
standby will shut down. 5V standby continues to
provide power for a minimum of 300ms. Holdup pins
are provided for the addition of external capacitance
up to a maximum of 10,000 uF. Capacitors should be
rated 100VDC or higher.
Inhibit:
If this input is pulled logic low the 5V, 3V3 & ±12V
outputs will be disabled. 5Vstandby will remain
operational.
Over-temperature Shutdown
If the internal temperature exceeds 100°C, the PSU
will shut down and remain off until the internal
temperature drops below 85°C and the input power is
recycled.
Override:
If this input is pulled logic low, the over-voltage and
overtemperature fault protection functions will be
disabled.
Note: In the event of a hard fault, activation of this
function may result in permanent damage to the unit.
SIGNALS
PSUGOOD:
This open collector output in the OFF state indicates
that all output voltages are within normal regulation
limits.
Maximum sink current is 48mA with Vout <0.6V.
Recommended pull up to +5V via a 5Kohm
resistance.
TEMP WARNING:
This signal provides an over-temperature warning at
92°C. This is an open collector style signal which is
LOW when the temperature exceeds 92°C. Maximum
sink current is 48mA with Vout <0.6V. Recommended
pull up to +5V via a 5Kohm resistance.
TEMP Signal:
This provides an output voltage proportional to the
ambient internal temperature. The signal has been
scaled to 28.57mV / °C, -55°C = 0V, +120°C = 5V,
and is capable of driving into a 5Kohm resistive load.
ACFAIL* & SYSRESET* Signals:
ACFAIL*, SYRESET* as per ANSI /VITA 1-1994.
Recommended pull up to +5V via a 5Kohm
resistance.
Power Monitor Failure Timing
Power Monitor System Restart Timing
4ms
MIN
2ms
MIN
50 s
MIN
+5V OUTPUT
ACFAIL*
SYSRESET*
0ms
MIN
4.875V
2.0V
0.6V
200ms
MIN
+5V OUTPUT
ACFAIL*
SYSRESET*
0ms
MIN
4.875V
2.0V
0.6V
200ms
MIN
Project2:Layout 1
10/11/09
09:45
Page 1
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