65
Supply Current, Icc:
4.5A average (typical with 1.2 GHz processor and 512 MB
SDRAM. Peak (short duration) power supply current may
be significantly higher (up to 50%) and will vary depending
upon the application.
Supply Current, Icc3:
2.5A average (typical with 1.2 GHz processor and 512 MB
SDRAM. Peak (short duration) power supply current may
be significantly higher (up to 50%) and will vary depending
upon the application.
Supply Current, AUX + (12V):
50mA maximum
A.2.2 Battery Backup Characteristics
Battery Voltage:
3V
Battery Capacity:
250mAh
Real-Time Clock Requirements:
8
µ
A maximum (Vbat = 3V, Vcc=0V)
Real-Time Clock Data Retention:
31,250 hours / 3.7 years minimum (not powered);
5.2 years minimum (with Vcc power applied 8 hours per
day)
Electrochemical Construction:
Long life lithium with solid-state polycarbon monofluoride
cathode.
CAUTION:
The cPB-4612 contains a lithium battery. This battery is not field-replaceable.
There is a danger of explosion if the battery is incorrectly replaced or handled. Do not
disassemble or recharge the battery. Do not dispose of the battery in fire. When the battery
is replaced, the same type or an equivalent type recommended by the manufacturer must be
used. Used batteries must be disposed of according to the manufacturer's instructions.
Return the board to DTI for battery service.
A.2.3 Operating Temperature
The cPB-4612’s heatsink allows a maximum ambient air temperature of 50°C with 200 LFM (linear feet
per minute) of airflow. External airflow
must
be provided to the cPB-4612 at all times. Refer to the
"Electrical and Environmental" topic in Chapter 2 for additional information. Also refer to the topic
"Temperature Monitoring" in Appendix C, "Thermal Considerations", for details on monitoring the
processor temperature.
A.3 Reliability
MTBF:
9.1 years (excluding on-board hard disk drive)
MTTR:
3 minutes (based on board replacement), plus system startup
A.4 Mechanical
This section includes the following mechanical specifications:
•
Dimensions and weight
•
Connector locations, descriptions, and pin outs
