Current Consumption - GE SBC330 3U VPX Hardware Reference Manual

86 SBC330 3U VPX Single Board Computer
If, during normal powered operation, the 5V rail makes an excursion beyond
those given below, the SBC330 enters power‐up/reset and hangs until the 5V rail is
back within its 90% limit for a period estimated to be 200 nS. In this event, the
SBC330 undergoes a full HRESET.
To run the Real‐Time‐Clock (RTC) and the BMM, P3V3_AUX must be present,
unless P3V3_BAT is present, which will only maintain the RTC. The RTC backup
takes only 1 μA.
Table A-2
Supply
V MIN
VCC (Vs3) + 4.88V
P3V3_AUX + 3.14V
(optional)
P3V3_BAT + 1.80V
(optional)
SBC330 accommodates Transient suppression to MIL‐STD‐704D.
• +5V +5%‐2.5% DC total excursion, including all transients
Vripple (+5V) = 50mV RMS maximum contained in the total excursion.
• +3.3V Aux 5% DC total excursion, including all transients
Vripple (+5V) = 50mV RMS maximum contained in the total excursion.
WARNING
Do not exceed the maximum rated input voltages or apply reversed bias to the assembly. If
such conditions occur, toxic fumes may be produced due to the destruction of components.
A.2.2 Current consumption
Current consumption figures for SBC330 are shown below. These are given at
cold‐wall temperatures of +25°C and +85°C in a conduction‐cooled environment
All figures were measured on a board with 1 GByte of DDR2 RAM and 256
MBytes of Flash. Typical consumption was measured whilst running VxWorks
shell prompt. Maximum consumption was measured whilst running a FFT test
(on both cores for dual‐core variants)
Table A-3
Temperature
Operation
(°C)
+25 Idle - VxWorks prompt
Maximum - FFT test
+85 Typical - VxWorks prompt
Maximum - FFT test
NOTE
P3V3_AUX current requirement has not been measured, but will be less than the 1.0 A provision of
the VPX Specification. The RTC backup from P3V3_AUX or VBAT takes 1.2 µA.
V NOM V MAX
+5.0V +5.25V
+3.3V +3.46V
+3.3V +5.00V
5V Current (A)
Dual-core
@ 1.0 GHz
5.6 Amps
TBD
TBD
TBD
Dual-core
@ 1.5 GHz
6.1 Amps
TBD
TBD
TBD
Publication No. SBC330-0HH/3