Datasheet

cui.com
date 11/07/2014 │ page 18 of 36CUI Inc │ SERIES: NQB-D │ DESCRIPTION: FULLY REGULATED ADVANCED BUS CONVERTERS
Typical Characteristics
12.45 V, 70 A / 830 W, two products in parallel
noitapissiD rewoP ycneiciffE
75
80
85
90
95
100
010203040506070[A]
[%]
40 V
48 V
53 V
60 V
0
5
10
15
20
25
30
35
40
45
010203040506070
[A]
[W]
40 V
48 V
53 V
60 V
Efficiency vs. load current and input voltage at T
P1
, T
P3
= +25C
Dissipated power vs. load current and input voltage at
T
P1
, T
P3
= +25°C
Output Characteristics Current Limit Characteristics
11.8
11.9
12.0
12.1
12.2
12.3
12.4
12.5
010203040506070[A]
[V]
40 V
48 V
53 V
60 V
3.0
5.0
7.0
9.0
11.0
13.0
70 75 80 85 90 [A]
[V]
40 V
48 V
53 V
60 V
Output voltage vs. load current at T
P1
, T
P3
= +25°C Output voltage vs. load current at I
O
> max I
O
, T
P1
, T
P3
= +25°C
Start-up 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
step-change (17.5-52.5-17.5 A) at:
T
P1
, T
P3
=+25°C, V
I
= 53 V, C
O
= 3.9 mF
Top trace: output voltage (0.5 V/div.).
Bottom trace: output current (20 A/div.).
Time scale: (0.5 ms/div.).
For more information, please visit the product page.