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USQ Series
Typical Performance Curves for 12VOUT Models
Start-Up from V
IN
(VIN = 48V, IOUT = 8.3A, COUT = 10µF tantalum || 1µF ceramic.)
2msec/div
5V/div
20V/div
12V
OUT
(pin 8)
+Input
(pin 3)
95
90
85
80
75
70
65
60
55
USQ-12/8.3-D48 Efficiency vs. Line Voltage and Load Current
0.83 1.66 2.49 3.32 4.15 4.98 5.81 6.64 7.47 8.3
Load Current (Amps)
Efficiency (%)
V
IN
= 36V
V
IN
= 75V
V
IN
= 48V
18
USQ-12/8.3-D48: Output Current vs. Ambient Temperature
(Longitudinal air flow, pin 1 to pin 3; VIN = 48V, no heat sink.)
Output Current (Amps)
Ambient Temperature (°C)
10
8
6
4
2
0
–40 –10 0 10 20 30 40 50 60 70 80 90 100
Natural Convection
200 lfm
400 lfm
600 lfm
USQ-12/8.3-D48: Output Current vs. Ambient Temperature
(Transverse air flow, pin 1 to pin 3; VIN = 48V, no heat sink.)
Output Current (Amps)
Ambient Temperature (°C)
9
8
7
6
5
4
3
2
1
0
20 25 30 35 40 45 50 55 60 65 70 75 80 85
200 lfm
400 lfm
600 lfm
Natural Convection
The USQ Series 12V models are discontinued. These Performance
Curves are for documentation purposes only. Refer to DATEL's
ULQ or UVQ series for alternate models.
2 0 A , S I N G L E O U T P U T D C / D C C O N V E R T E R S