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Q48T08120-NBB0

P1-P3P4-P6P7-P9P10-P12P13-P14
JUN 23, 2004 revised to NOV 20, 2006 Page 10 of 14 www.power-one.com
Q48T08120 DC-DC Converter Data Sheet
3
6
-75 VDC In
p
ut; 12VDC
@
8A O
u
t
p
ut
Ambient Temperature [°C]
20 30 40 50 60 70 80 90
Load Current [Adc]
0
1
2
3
4
5
6
7
8
9
10
500 LFM (2.5 m/s)
400 LFM (2.0 m/s)
300 LFM (1.5 m/s)
200 LFM (1.0 m/s)
100 LFM (0.5 m/s)
30 LFM (0.15 m/s)
Fig. 10: Available load current vs. ambient air temperature and
airflow rates for converter mounted vertically with Vin = 54 V,
air flowing from pin 3 to pin 1 and maximum FET temperature ≤
120°C.
Ambient Temperature [°C]
20 30 40 50 60 70 80 90
Load Current [Adc]
0
1
2
3
4
5
6
7
8
9
10
500 LFM (2.5 m/s)
400 LFM (2.0 m/s)
300 LFM (1.5 m/s)
200 LFM (1.0 m/s)
100 LFM (0.5 m/s)
30 LFM (0.15 m/s)
Fig. 12: Available load current vs. ambient temperature and
airflow rates for converter mounted horizontally with Vin = 54
V, air flowing from pin 3 to pin 4 and maximum FET tempera-
ture ≤ 120°C.
Ambient Temperature [°C]
20 30 40 50 60 70 80 90
Load Current [Adc]
0
1
2
3
4
5
6
7
8
9
10
500 LFM (2.5 m/s)
400 LFM (2.0 m/s)
300 LFM (1.5 m/s)
200 LFM (1.0 m/s)
100 LFM (0.5 m/s)
30 LFM (0.15 m/s)
Fig. 11: Available load current vs. ambient air temperature and
airflow rates for converter mounted vertically with Vin = 54 V,
air flowing from pin 3 to pin 1 and maximum FET temperature ≤
105°C.
Ambient Temperature [°C]
20 30 40 50 60 70 80 90
Load Current [Adc]
0
1
2
3
4
5
6
7
8
9
10
500 LFM (2.5 m/s)
400 LFM (2.0 m/s)
300 LFM (1.5 m/s)
200 LFM (1.0 m/s)
100 LFM (0.5 m/s)
30 LFM (0.15 m/s)
Fig. 13: Available load current vs. ambient temperature and
airflow rates for converter mounted horizontally with Vin = 54
V, air flowing from pin 3 to pin 4 and maximum FET tempera-
ture ≤ 105°C.
JUN 23, 2004 revised to NOV 20, 2006 Page 11 of 14 www.power-one.com
Q48T08120 DC-DC Converter Data Sheet
3
6
-75 VDC In
p
ut; 12VDC
@
8A O
u
t
p
ut
Load Current [Adc]
012345678910
Efficiency
0.65
0.70
0.75
0.80
0.85
0.90
0.95
72 V
54 V
36 V
Fig. 14: Efficiency vs. load current and input voltage for con-
verter mounted vertically with air flowing from pin 3 to pin 1 at a
rate of 300 LFM (1.5 m/s) and Ta = 25°C.
Load Current [Adc]
012345678910
Efficiency
0.65
0.70
0.75
0.80
0.85
0.90
0.95
72 V
54 V
36 V
Fig. 16: Efficiency vs. load current and input voltage for con-
verter mounted horizontally with air flowing from pin 3 to pin 4
at a rate of 300 LFM (1.5 m/s) and Ta = 25°C.
Load Current [Adc]
012345678910
Efficiency
0.65
0.70
0.75
0.80
0.85
0.90
0.95
70 C
55 C
40 C
Fig. 15: Efficiency vs. load current and ambient temperature
for converter mounted vertically with Vin = 54 V and air flowing
from pin 3 to pin 1 at a rate of 200 LFM (1.0 m/s).
Load Current [Adc]
012345678910
Efficiency
0.65
0.70
0.75
0.80
0.85
0.90
0.95
70 C
55 C
40 C
Fig. 17: Efficiency vs. load current and ambient temperature
for converter mounted horizontally with Vin = 54 V and air flow-
ing from pin 3 to pin 4 at a rate of 200 LFM (1.0 m/s).
JUN 23, 2004 revised to NOV 20, 2006 Page 12 of 14 www.power-one.com
Q48T08120 DC-DC Converter Data Sheet
3
6
-75 VDC In
p
ut; 12VDC
@
8A O
u
t
p
ut
Fig. 18: Turn-on transient at full rated load current (resistive)
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 (5 V/div.) Time scale: 1 ms/div.
Fig. 20: Output voltage response to load current step-change
(2 A – 4 A – 2 A) at Vin = 48 V. Top trace: output voltage (200
mV/div). Bottom trace: load current (2 A/div.). Current slew
rate: 0.1 A/µs. Co = 1 µF ceramic. Time scale: 0.5 ms/div.
Fig. 19: Turn-on transient at full rated load current (resistive)
plus 2,200 µF at Vin = 48 V, triggered via ON/OFF pin. Top
trace: ON/OFF signal (5 V/div.). Bottom trace: output voltage
(5 V/div.). Time scale: 2 ms/div.
Fig. 21: Output voltage response to load current step-change
(2 A – 4 A – 2 A) at Vin = 48 V. Top trace: output voltage (200
mV/div.). Bottom trace: load current (2 A/div). Current slew
rate: 5 A/µs. Co = 450 µF tantalum + 1 µF ceramic. Time scale:
0.5 ms/div.
P1-P3P4-P6P7-P9P10-P12P13-P14

Q48T08120-NBB0

Mfr. #:
Buy Q48T08120-NBB0
Manufacturer:
Bel
Description:
Module DC-DC 48VIN 1-OUT 12V 8A 8-Pin Quarter-Brick
Lifecycle:
New from this manufacturer.
Delivery:
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