Acer TravelMate 620 Series, Service Manual

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Chapter 1 27
Electrical Specification
Supply voltage for LCD display (V) 3.3
Supply voltage for LCD backlight
(Vrms) 690
AC Adapter
Item Specification
Vendor & model name Delta ADT-60XB D 3P
Input Requirements
Maximum input current (A,
@90Vac, full load) 1.5 A @ 90Vac
0.9 A @ 180Vac
Nominal frequency (Hz) 47 - 63
Frequency variation range (Hz) 47 - 63
Nominal voltages (Vrms) 90 - 270
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 83% minimum, when measured at maximum
load under 115V(60Hz).
Output Ratings (CV mode)
DC output voltage +19.0V~20.0V
Noise + Ripple 300mvp-pmax (20MHz bandwidth)
Load 0 A (min.) 3.16 A (max.)
Output Ratings (CC mode)
DC output voltage +12V ~ +19V
Constant output 2.75 ± 0.2 A
Dynamic Output Characteristics
Turn-on delay time 2 sec. (@115Vac)
Hold up time 4 ms min. (@115 Vac input, full load)
Over Voltage Protection (OVP) 24 V
Short circuit protection Output can be shorted without damage
Electrostatic discharge (ESD) 15kV (at air discharge)
8kV (at contact discharge)
Dielectric Withstand Voltage
Primary to secondary 1500 Vac (or 2121 Vdc), 10 mA for 1 second
Leakage current 0.25 mA max. (@ 254 Vac, 60Hz)
Regulatory Requirements Internal filter meets:
1. FCC class B requirements. (USA)
2. VDE 243/1991 class B requirements. (German)
3. CISPR 22 Class B requirements. (Scandinavia)
4. VCCI class II requirements. (Japan)
LCD
Item Specification