NQB-420DWA-AN Datasheet, PDF (18/36 Pages) CUI INC – FULLY REGULATED ADVANCED BUS CONVERTERS

CUI Inc │ SERIES: NQB-D │ DESCRIPTION: FULLY REGULATED ADVANCED BUS CONVERTERS
date 02/20/2013 │ page 18 of 36
Typical Characteristics
12.45 V, 70 A / 830 W, two products in parallel
Efficiency
[%]
100
95
90
40 V
48 V
85
53 V
60 V
80
75
0 10 20 30 40 50 60 70 [A]
Efficiency vs. load current and input voltage at T_P1, T_P3 = +25 C
Output Characteristics
[V]
12.5
12.4
12.3
12.2
12.1
12.0
11.9
11.8
0 10 20 30 40 50 60 70 [A]
Output voltage vs. load current at T_P1, T_P3 = +25°C
40 V
48 V
53 V
60 V
Start-up
Power Dissipation
[W]
45
40
35
30
25
20
15
10
5
0
0
10 20 30 40 50 60 70 ^[A]
Dissipated power vs. load current and input voltage at
T_P1, T_P3 = +25°C
Current Limit Characteristics
[V]
13.0
11.0
9.0
7.0
5.0
3.0
70
75
80
85
90 [A]
40 V
48 V
53 V
60 V
40 V
48 V
53 V
60 V
Output voltage vs. load current at I_O > max I_O , T_P1, T_P3 = +25°C
Output Load Transient Response
Start-up enabled by connecting V_I at:
T_P1, T_P3 = +25°C, V_I = 53 V,
I_O = 70 A resistive load.
Top trace: output voltage (5 V/div.).
Bottom trace: input voltage (50 V/div.).
Time scale: (10 ms/div.).
Output voltage response to load current Top trace: output voltage (0.5 V/div.).
step-change (17.5-52.5-17.5 A) at:
Bottom trace: output current (20 A/div.).
T_P1, T_P3 =+25°C, V_I = 53 V, C_O = 3.9 mF Time scale: (0.5 ms/div.).
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