Datasheet
cui.com
date 11/07/2014 │ page 8 of 36CUI Inc │ SERIES: NQB-D │ DESCRIPTION: FULLY REGULATED ADVANCED BUS CONVERTERS
Typical Characteristics 
12.0 V, 35 A / 420 W 
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Start-up enabled by connecting V
I
 at: 
T
P1
, T
P3
 = +25°C, V
I
 = 53 V, 
I
O
 = 35 A resistive load. 
Top trace: output voltage (5 V/div.). 
Bottom trace: input voltage (50 V/div.). 
Time scale: (10 ms/div.). 
Shut-down enabled by disconnecting V
I
 at: 
T
P1
, T
P3 
 = +25°C, V
I
 = 53 V, 
I
O
 =35 A resistive load. 
Top trace: output voltage (5 V/div.).  
Bottom trace: input voltage (50 V/div.). 
Time scale: (2 ms/div.).
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Output voltage ripple at: 
T
P1
, T
P3
 = +25°C, V
I
 = 53 V, 
I
O
 = 35 A resistive load.
Trace: output voltage (50 mV/div.). 
Time scale: (2 µs/div.).
Output voltage response to load current 
step-change (8.75-26.25-8.75 A) at: 
T
P1
, T
P3 
=+25°C, V
I
 = 53 V, C
O
 = 3.5 mF.
Top trace: output voltage (0.5 V/div.). 
Bottom trace: output current (20 A/div.). 
Time scale: (0.5 ms/div.).
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Output voltage response to input voltage 
transient at: 
T
P1
, T
P3
 = +25°C, V
I
 = 36-75 V, 
I
O
 = 17 A resistive load, C
O
 = 3.5 mF 
Top trace: output voltage (2 V/div.). 
Bottom trace: input voltage (20 V/div.). 
Time scale: (0.5 ms/div.). 
For more information, please visit the product page.










