HBA48T12280 Power-One, HBA48T12280 Datasheet - Page 10

• Manufacturer Part Number: HBA48T12280
• Description: Hba48t12280 Dc-dc Converter 36-75 Vdc Input; 28 Vdc @ 12.5 A Output
• Manufacturer: Power-One

Figure J: Start-up using the on-off enable pin. Il=12.5Amps,
Cout=220 µF, Vin=48 VDC.
Figure K: Start-up using Vcc. Il=12.5 Amps, Cout=220 µF,
Vin=48 VDC.
Dynamic Load Response
Figure L shows the output voltage transient when the
output of the HBA has a 7.5 to 10 amp transient with
a slew rate of 0.1Amp per microsecond is applied to
the output. The output has a Cout =220 µF. Figure M
shows the output voltage transient when the output
of the HBA has a 7.5 to 10 amp transient with a slew
rate of 1.0 Amp per microsecond is applied to the
output. The output has a Cout =4700 µF.
BCD.00009.1 Rev. AA, 20-Oct-09
HBA48T12280 DC-DC Converter Data Sheet
36-75 VDC Input; 28 VDC @ 12.5 A Output
Page 10 of 14
Figure L: Output voltage response to load current step-
change (7.5A – 10A – 7.5A) at Vin = 48 V. Current slew rate:
0.1 A/µs. Co = 220 µF aluminum electrolytic.
Figure M: Output voltage response to load current step-
change (7.5A – 10A – 7.5A) at Vin = 48 V. Current slew rate:
1.0 A/µs. Co = 4700 µF aluminum electrolytic.
Ripple and Noise
Figure N shows the output voltage ripple waveform,
measured at full rated load current with a 10 µF
tantalum and 1 µF ceramic capacitor across the
output. Note that all output voltage waveforms are
measured across a 1 µF ceramic capacitor. The
input reflected-ripple current waveforms are obtained
using the test setup shown in Figure O.
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