Datasheet

cui.com
date 11/07/2014 │ page 4 of 30CUI Inc │ SERIES: NQB-N │ DESCRIPTION: FULLY REGULATED ADVANCED BUS CONVERTERS
Absolute Maximum Ratings
parameter conditions/description min typ max units
operating temperature (T
P1
) see thermal consideration section -40 +125 °C
storage temperature (T
S
) -55 +125 °C
input voltage (V
I
) -0.5
+80
+65*
V
isolation voltage (V
iso
) input to output test voltage, see note 1 2250 Vdc
input voltage transient (V
tr
)
according to ETSI EN 300 132-2 and Telcordia GR-
1089-CORE
+100
+80*
V
remote control pin voltage (V
RC
) see operating information section -0.3 18 V
Stress in excess of Absolute Maximum Ratings may cause permanent damage. Absolute Maximum Ratings, sometimes referred to as no destruction limits, are normally tested with one
parameter at a time exceeding the limits of Output data or Electrical Characteristics. If exposed to stress above these limits, function and performance may degrade in an unspecied
manner.
Note 1: Isolation voltage (input/output to base-plate) max 750 Vdc.
* Applies for the narrow input version V
I
= 40-60 V
Fundamental Circuit Diagram
-IN
+IN
+OUT
-OUT
Driver
Driver
Control
RC isolation
Auxillary
Supply
RC
Functional Description
T
P1
, T
P3
= -40 to +90ºC, V
I
= 36 to 75 V.
Typical values given at: T
P1
, T
P3
= +25°C, V
I
= 53 V, max I
O
, unless otherwise specied under Conditions
Conguration File: 190 10-CDA 102 0314/001
parameter conditions/description min typ max units
fault protection
characteristics
input under voltage lockout
(UVLO)
fault limit
setpoint accuracy
hysteresis
delay
-2
33
2
300
2
V
%
V
μs
output voltage - under voltage
protection
fault limit
fault response time
0
200
V
μs
output voltage - over voltage
protection
fault limit
fault response time
15.6
200
V
μs
over current protection (OCP)
setpoint accuracy (I
O
)
fault limit
fault response time
-6
41
200
6 %
A
μs
over temperature protection
(OTP)
fault limit
hysteresis
fault response time
125
10
300
ºC
ºC
μs
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