ABC400 Series

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BCD.00186_AD

Figure 3: Inrush current, Vin = 230Vac, 90° CH2: Vin (250V/div), CH3: Iin (10A/div)

INPUT UNDER-VOLTAGE

If the sinusoidal input voltage stays below the input under voltage lockout threshold

the input voltage returns within the normal operating range, the supply will return to normal operation again.

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 interleaved transition 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.

EFFICIENCY

The high efficiency (see

interleaved transition mode PFC topology minimizing switching losses. Synchronous rectifiers on the output reduce the losses

in the high current output path for ABC400-1012G schottky diode and ultra-fast diode are used as rectifiers for

ABC400-1024G and ABC400-1048G due to the high output voltage level.

Figure 4: Efficiency vs. Output Power at 230VAC,

ABC400-1012G

Figure 5: Efficiency vs. Output Power at 230VAC,

ABC400-1024G

Figure 6: Efficiency vs. Output Power at 230VAC, ABC400-1048G

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Po (W)

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76.0

78.0

80.0

82.0

84.0

86.0

88.0

90.0

92.0

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Po (W)

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