Ampro Corporation XTX 820 manual Power Specifications, Environmental Specifications, Humidity

Chapter 2 Product Overview

Power Specifications

Table 2-4 lists the power requirements for each XTX 820 CPU model as described below.

Table 2-4. Power Supply Requirements

Parameter	1.0 GHz ULV Celeron	1.4 GHz LV Pentium M	1.8 GHz LV Pentium M
	M Characteristics	Characteristics	Characteristics
Input Type	Regulated DC voltages	Regulated DC voltages	Regulated DC voltages
In-rush Current*	14.20A	16.20A	14.16A
Typical BIT**	3.34A (16.71W)	3.89A (19.46W)	5.31A (26.57W)
Current (W)

Notes: *The In-rush current represents video, 256 MB RAM, and power only connected through the Ampro baseboard. Typically, in-rush current reflects the short duration current spike associated with charging large on-board bulk capacitance during power supply start up. However, the listed in-rush current value is the result of placing a switch on the DC output of a fully 'ramped' power supply to give a worst-case current value, which is much higher than the standard method. This in-rush value should be regarded as a maximum design guideline, not a requisite value.

**The Burn-In-Test (BIT) current setup has CRT video, 256 MB RAM, floppy drive (1), IDE hard disk drive (1), USB hard disk drive (1), USB CD-ROM (1), serial ports with loopbacks (3), keyboard, mouse, USB compact flash card reader with compact flash card (64 MB) installed (1), USB Jump- drive (1), and the Ethernet port (1) operating under Microsoft→ Windows→™ XP (SP2). All current measurements include the Ampro baseboard in the QuickStart Kit.

Environmental Specifications

Table 2-5 provides the most efficient operating and storage condition ranges required for this board.

Table 2-5. Environmental Requirements

	Parameter	1.0 GHz ULV Celeron	1.4 GHz LV Pentium	1.8 GHz LV Pentium
		M Conditions	M Conditions	M Conditions
Temperature	Operating	+0° to +60°C	+0° to +60°C	+0° to +60°C
		(32° to +158°F)	(32° to +158°F)	(32° to +140°F)
	Storage	–20° to +75°C	–20° to +75°C	–20° to +75°C
		(–4° to +185°F)	(–4 °to +185°F)	(–4° to +185°F)
Humidity	Operating	5% to 95%	5% to 95%	5% to 95%
		relative humidity,	relative humidity,	relative humidity,
		non-condensing	non-condensing	non-condensing
	Storage	5% to 95%	5% to 95%	5% to 95%
		relative humidity,	relative humidity,	relative humidity,
		non-condensing	non-condensing	non-condensing

Thermal/Cooling Solutions

The Pentium/Celeron M processors used on the XTX 820 make use of the thermal monitor feature to help control the processor temperature. Refer to the Thermal Monitoring topic in Chapter 3, Hardware for more information. The maximum core operating temperature for Pentium M and Celeron M processors is 100°C. Both Pentium M and Celeron M processors and the Memory & Graphics Hub (Northbridge) require individual heatsinks, but no fan. Ampro provides an optional heatspreader plate.

CAUTION To prevent processor overheating, you must provide an additional form of cooling when using the heatspreader provided. The heatspreader plate is not a complete thermal solution for any of the processors listed.

14 Reference Manual XTX 820