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Chapter 1 31
the table.
AC Adapter
Item Specification
Vendor & model name Liton, 135W power supply
Input Voltage
Low Range 90(min.)/137(max.)/100-127(nominal)
High Range 180(min.)/265(max.)200-240(nominal)
Input current 2.2A(max)
Nominal frequency (Hz) 50-60
Frequency variation range (Hz) 47-63
Efficiency It should provide an efficiency of 85% minimum, when measured at maximum
load under 115Vac.
Output Requirements
DC output voltage 19V
Noise + Ripple 380mV as output voltage is 19V
Peak Load 18.5V-19.71V
Dynamic Output Characteristics
Turn-on delay time 5 sec (@ 115Vac)
Hold up time 5ms (@115Vac, Full load)
Over Voltage Protection (OVP) 29V
Short circuit protection 9.5A @19V output voltage
Electrostatic discharge (ESD) 15KV (at air discharge)
8KV (at contact discharge)
Dielectric Withstand Voltage
Primary to secondary 2150VDC for 1 sec.
Ground leakage current less than 250uA
Power Management
Power Saving Mode Phenomenon
Standby Mode
Enter Standby Mode when
1.Standby/Hibernation hot-key is pressed
and system is not ready to enter Hibernation
mode.
2.System standby/ Hibernation timer expires
and system is not ready to enter Hibernation
mode.
T The buzzer beeps
T The Sleep indicator lights up
Hibernation Mode
Enter Hibernation Mode (suspend to HDD)
when
1.Hibernation hot-key is pressed and
system is ready to enter Hibernation mode
2.System Hibernation timer expires and
system is ready to enter Hibernation mode.
T All power shuts off
Display Standby Mode
Keyboard, built-in touchpad, and an external
PS/2 pointing device are idle for a specified
period.
T The display shuts off
Hard Disk Standby Mode
Hard disk is idle within a specified period of
time.
T Hard disk drive is in standby mode.
(spindle turned-off)