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SQM48T25012-PDB0

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24P25-P27P28-P30
MCD10085 Rev. 1.1, 08-Jul-10 Page 13 of 30 www.power-one.com
SQM48 Series Data Sheet
SemiQ
TM
Family 25A DC-DC Converters
SQM48T/S25020 (2.0 Volts Out)
Fig. 2.0V.3: Turn-on transient at full rated load current (resis-
tive) with no output capacitor at Vin = 48 V, triggered via
ON/OFF pin. Top trace: ON/OFF signal (5 V/div.). Bottom
trace: output voltage (1 V/div.). Time scale: 1 ms/div.
Fig. 2.0V.5: Output voltage response to load current step-
change (5 A – 10 A – 5 A) at Vin = 48 V. Top trace: output vol-
tage (100 mV/div.). Bottom trace: load current (5 A/div.). Cur-
rent slew rate: 0.1 A/s. Co = 1 F ceramic. Time scale: 0.2
ms/div.
Fig. 2.0V.4: Turn-on transient at full rated load current (resis-
tive) plus 20,000 F at Vin = 48 V, triggered via ON/OFF pin.
Top trace: ON/OFF signal (5 V/div.). Bottom trace: output vol-
tage (1 V/div.). Time scale: 1 ms/div.
Fig. 2.0V.6: Output voltage response to load current step-
change (5 A – 10 A – 5 A) at Vin = 48 V. Top trace: output vol-
tage (100 mV/div.). Bottom trace: load current (5 A/div.). Cur-
rent slew rate: 5 A/s. Co = 450 F tantalum + 1 F ceramic.
Time scale: 0.2 ms/div.
MCD10085 Rev. 1.1, 08-Jul-10 Page 14 of 30 www.power-one.com
SQM48 Series Data Sheet
SemiQ
TM
Family 25A DC-DC Converters
SQM48T/S25020 (2.0 Volts Out)
Fig. 2.0V.7: Output voltage ripple (20 mV/div.) at full rated load
current into a resistive load with Co = 10 F tantalum + 1uF ce-
ramic and Vin = 48 V. Time scale: 1 s/div.
Fig. 2.0V.9: Input reflected ripple current, i
c
(100 mA/div.),
measured at input terminals at full rated load current and Vin =
48 V. Refer to Fig. 2.0V.8 for test setup. Time scale: 1 s/div.
Vout
Vsource
i
s
i
c
1 F
ceramic
capacitor
10 H
source
inductance
SemiQ
TM
Family
DC/DC
Converter
33 F
ESR <1
electrolytic
capacitor
Fig. 2.0V.8: Test setup for measuring input reflected ripple cur-
rents,
i
c
and i
s
.
Fig. 2.0V.10: Input reflected ripple current, i
s
(10 mA/div.),
measured through 10 H at the source at full rated load current
and Vin = 48 V. Refer to Fig. 2.0V.8 for test setup. Time scale:
1s/div.
MCD10085 Rev. 1.1, 08-Jul-10 Page 15 of 30 www.power-one.com
SQM48 Series Data Sheet
SemiQ
TM
Family 25A DC-DC Converters
SQM48T/S25020 (2.0 Volts Out)
5
30
3.0
Iout [Adc]
Vout [Vdc]
0
0
2.5
1.0
0.5
10 15
2.0
1.5
20 25
Fig. 2.0V.11: Output voltage vs. load current showing current
limit point and converter shutdown point. Input voltage has al-
most no effect on current limit characteristic.
Fig. 2.0V.12: Load current (top trace, 20 A/div., 20 ms/div.) in-
to a 10 m short circuit during restart, at Vin = 48 V. Bottom
trace (20 A/div., 1 ms/div.) is an expansion of the on-time por-
tion of the top trace.
.
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24P25-P27P28-P30

SQM48T25012-PDB0

Mfr. #:
Buy SQM48T25012-PDB0
Manufacturer:
Bel
Description:
DC DC CONVERTER 1.2V 30W
Lifecycle:
New from this manufacturer.
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