Ampro Corporation Littleboard 550 manual Power Specifications, Environmental Specifications

Chapter 2 Product Overview

Power Specifications

Table 2-8 shows the power requirements for the LittleBoard, including the I/O interface board.

Table 2-8. Power Supply Requirements

Parameter	300MHz Characteristics	533MHz Characteristics	1GHz Characteristics
Input Type	Regulated DC voltages	Regulated DC voltages	Regulated DC voltages
In-rush* Current	26.9Amps (134.5W)	20.6Amps (103W)	25.9Amps (129.5W)
(Typical)
BIT** Current	1.98Amps (9.92W)	2.51Amps (12.55W)	2.84Amps (14.21W)
(Typical)

Notes: *In-rush measured with video, 64MB memory, and power connected. **The BIT (burn in test) current was derived with 64MB SDRAM, (1) floppy, (1) IDE HDD, (1) on-board 64MB CompactFlash, I/O Interface board, (2) serial ports w/loopbacks, (1) externally-powered USB CD-ROM, (1) externally- powered USB HDD, (1) external USB Jump-drive (key-chain CompactFlash type), (1) external USB CompactFlash Reader with 64MB CompactFlash card, and (2) Ethernet channel connections using Win2k OS.

Environmental Specifications

Table 2-9 provides the most efficient operating and storage condition ranges required for this board.

Table 2-9. Environmental Requirements

Temperature

Humidity

Processor	300MHz Conditions
Operating	+0° to +70°C
	(32° to +158°F)
Extended	-40° to +85°C
(Optional)	°	°
	(-40	to +185 F)
Storage	–55° to +85°C
	(–67° to +185°F)
Operating	5% to 95%
	relative humidity,
	non-condensing
Non-operating	5% to 95%
	relative humidity,
	non-condensing

533MHz Conditions

+0° to +70°C

(32° to +158°F)

-40° to +85°C (-40° to+185°F)

–55° to +85°C (–67° to +185°F)

5% to 95% relative humidity, non-condensing

5% to 95% relative humidity, non-condensing

1GHz Conditions

+0° to +70°C

(32° to +158°F)

-40° to +85°C (-40° to +185°F)

–55° to +85°C (–67° to +185°F)

5% to 95% relative humidity, non-condensing

5% to 95% relative humidity, non-condensing

Thermal/Cooling Requirements

The CPU, Northbridge, Southbridge, and voltage regulators are the sources of heat on the board. The LittleBoard 550 is designed to operate at its maximum CPU speed of 300MHz, 533MHz, or 1GHz. All processors and the northbridge require a heatsink, but no fan is required.

LittleBoard 550 Reference Manual 19