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Chapter 1 31
Thermal
All components on inverter board should follow below rules:
1. Component using conditions (component stress) must be within component specification including voltage
rating, current rating, temperature etc.
2. Component temperature shold follow below:
T ∆T <=30 Celsius degrees, at 25, 35 Celsius degrees.
T Component temperature should be less than 70 Celsius degrees inside system at 35 Celsius degrees.
System Power Management
AC Adapter
Item Specification
Vendor & model name ADAPTER ASTEC SA80-3115-0583 and Liteon PA-1750-02CA
Input Requirements
Maximum input current (A,
@90Vac, full load)
1.2 Arms @ 90V
0.6 Arms @ 265V
Nominal frequency (Hz) 47 - 63
Frequency variation range (Hz) 47 - 63
Nominal voltages (Vrms) 90 - 265
Inrush current The maximum inrush current will be less than 50A and 100A when the adapter
is connected to 115Vac(60Hz) and 230Vac(50Hz) respectively.
Efficiency It should provide an efficiency of 84% minimum, when measured at maximum
load under 115V(60Hz).
Output Ratings (CV mode)
DC output voltage 19.0V including the effects of line voltage variation, load current, ripple and
noise
Noise + Ripple 300mvp-pmax (20MHz bandwidth) for resistor load
Output current 0 A (min.) 3.5A (max.)
Output Ratings (CC mode)
DC output voltage 19.0
Constant output 3.68A
Dynamic Output Characteristics
Start-up time 3 sec. (@115Vac)
Hold up time 6 ms min. (@120 Vac input, full load)
Over Voltage Protection (OVP) 27 V
Short circuit protection Output can be shorted without damage, and auto recovery
Electrostatic discharge (ESD) 15kV (at air discharge)
8kV (at contact discharge)
Dielectric Withstand Voltage
Primary to secondary 4242 Vdc for 1 second
Leakage current 250uA max at 250Vrms
Regulatory Requirements 1. FCC class B requirements(USA)
2. VDE class B requirements(German)
3. VCCI classII requirements(Japan)
ACPI mode Power Management
Mech. Off (G3) All devices in the system are turned off completely.
Soft Off (G2/S5) OS initiated shutdown. All devices in the system are turned off
completely.
Working (G0/S0) Individual devices such as the CPU and hard disk may be power
managed in this state.