5.1 INPUT FUSE
A slow-blow 5A input fuses(5 × 20 mm)in series with Live
line inside the power supply protects against severe defects.
The fuse and a VDR form together with the input filter an
effective protection against high input transients.
5.2 INRUSH CURRENT
The AC-DC power supply exhibits an X-capacitance of only
about 1.0 μF, resulting in a low and short peak current,
when the supply is connected to the mains. The internal
bulk capacitor will be charged through a NTC resistor which
will limit the inrush current (see Figure 2 and 3).
ABC200-10XXG Data Sheet
12VDC, 24VDC, 48VDC
Output
Figure 3: Inrush current, V
in
= 230Vac, 90°
CH1:
V
in
(200V/div),
CH2:
I
in
(20A/div)
5.3 INPUT UNDER-VOLTAGE
If the sinusoidal input voltage stays below the input under
voltage lockout threshold
V
i on
, the supply will be inhibited.
Once the input voltage returns within the normal operating
range, the supply will return to normal operation again.
5.4 POWER FACTOR CORRECTION
Power factor correction (PFC) is achieved by controlling the
input current waveform synchronously with the input
voltage. A specified PFC controller is implemented in the
boundary conduction mode topology giving outstanding
PFC results over a wide input voltage and load ranges. The
input current will follow the shape of the input voltage.
5.5 EFFICIENCY
The high efficiency (see Figure 4) is achieved by using soft-
switching LLC technology with boundary conduction mode
PFC topology minimizing switching losses. Synchronous
Figure 2: Inrush current, V
in
= 115Vac, 90°
CH1:
V
in
(100V/div),
CH2:
I
in
(10A/div),
BCD.G0201 Rev. AA, 29-Apr-2011
Page 4 / 12
www.power-one.com
POWER-ONE [ POWER-ONE ]
