Datasheet
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TYPICAL PERFORMANCE DATA
UQQ Series
Wide Input Range Single Output DC-DC Converters
MDC_UQQ.D05 Page 6 of 18
64
66
68
70
72
74
76
78
80
82
84
86
88
90
2 4 6 8 10 12 14 16 18 20 22 24 26
UQQ-3.3/25-Q48P
Efficiency vs. Line Voltage and Load Current @ 25ºC
Load Current (Amps)
Efficiency (%)
V
IN
= 72V
V
IN
= 60V
V
IN
= 48V
V
IN
= 36V
V
IN
= 24V
V
IN
= 18V
18
18.5
19
19.5
20
20.5
21
21.5
22
22.5
23
23.5
24
24.5
25
20 25 30 35 40 45 50 55 60 65 70 75 80 85
UQQ-3.3/25-Q12P Maximum Current Temperature Derating
(no baseplate, V
IN
= 12V, air flow is transverse)
Natural Convection
300 lfm
Output Current (Amps)
Ambient Temperature (
°
C)
400 lfm
200 lfm
100 lfm
13
14
15
16
17
18
19
20
21
22
23
24
25
26
20 25 30 35 40 45 50 55 60 65 70 75 80 85 90
Natural Convection
300 LFM
400 LFM
200 LFM
100 LFM
UQQ-3.3/25-Q48 Maximum Current Temperature Derating at sea level
(V
IN
= 48V, with baseplate, transverse air flow)
Output Current (Amps)
Ambient Temperature (
°
C)
20.0
20.5
21.0
21.5
22.0
22.5
23.0
23.5
24.0
24.5
25.0
20 25 30 35 40 45 50 55 60 65 70 75 80 85
Output Current (Amps)
Ambient Temperature (
°
C)
UQQ-3.3/25-Q12PB Maximum Current Temperature Derating
(with baseplate, V
IN
= 12V, air flow is transverse)
200 lfm
300 lfm
100 lfm
Natural Convection
UQQ-3.3/25-Q12
Efficiency vs. Line Voltage and Load Current @ 25°C
Load Current (Amps)
Efficiency (%)
V
IN
= 36V
V
IN
= 30V
V
IN
= 24V
90
88
86
84
82
80
78
76
74
1
2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25
V
IN
= 18V
V
IN
= 12V