AOpen OpenBook 1556, Service Manual

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26 OpenBook 1556
AC Adapter
Item Specification
Vendor & model name Delta ADP-65DB
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 100Vac(50Hz) and 240Vac(60Hz) respectively.
Efficiency It should provide an efficiency of 85% minimum, when measured at
maximum load under 240V(60Hz).
Output Ratings (CV mode)
DC output voltage +19.0V~21.5V
Noise + Ripple 300mvp-pmax (20MHz bandwidth)
Load 0 A (min.) 3.42 A (max.)
Output Ratings (CC mode)
DC output voltage +12V ~ +19V
Constant output 4.5 ± 0.3 A
Dynamic Output Characteristics
Turn-on delay time 3 sec. (@100Vac)
Hold up time 6 ms min. (@100 Vac input, full load)
Over Voltage Protection (OVP) 25 V
Short circuit protection Output can be shorted without damage (no broken, no smoke)
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)