Datasheet

cui.com
date 11/07/2014 │ page 17 of 36CUI Inc │ SERIES: NQB-D │ DESCRIPTION: FULLY REGULATED ADVANCED BUS CONVERTERS
Electrical Specification
12.45 V, 39 A / 462 W
T
P1
, T
P3
= -40 to +90ºC, V
I
= 40 to 60 V, sense pins connected to output pins unless otherwise specied under Conditions.
Typical values given at: T
P1
, T
P3
= +25°C, V
I
= 53 V, max I
O
, unless otherwise specied under Conditions.
Additional C
out
= 3.9 mF, Conguration File: 19010-CDA 102 0314/017
Note 1: OCP in hic-up mode
2: Low ESR-value
3: C
out
= 100 µF, external capacitance
4: Sink current drawn by external device connected to the RC pin. Minimum sink current required guaranteeing activated RC function.
parameter conditions/description min typ max units
input voltage range (V
I
) 40 60 V
turn-off input voltage (V
Ioff
) decreasing input voltage 36 37 38 V
turn-on input voltage (V
Ion
) increasing input voltage 38 39 40 V
internal input capacitance (C
I
) 18 μF
output power (P
O
) 0 462 W
efciency (η)
50% of max I
O
max I
O
50% of max I
O
, V
I
= 48 V
max I
O
, V
I
= 48 V
96.7
95.7
96.8
95.6
%
%
%
%
power dissipation (P
d
) max I
O
21.0 30.5 W
input idling power (P
li
) I
O
= 0 A, V
I
= 53 V 2.8 W
input standby power (P
RC
) V
I
= 53 V (turned off with RC) 0.4 W
default switching frequency (f
s
) 0-100% of max I
O
133 140 147 kHz
output voltage initial setting
and accuracy (V
Oi
)
T
P1
= 25°C, V
I
= 53 V, I
O
= 0 A 12.415 12.45 12.485 V
output adjust range (V
O
) see operating information 4.0 13.2 V
output voltage tolerance band
(V
O
)
0-100% of max I
O
11.5 12.7 V
line regulation (V
O
) max I
O
31 60 mV
load regulation (V
O
) V
I
= 53 V, 0-100% of max I
O
500 600 700 mV
load transient voltage deviation
(V
tr
)
V
I
= 53 V, load step 25-75-25% of max I
O
, di/dt =
1 A/μs
±0.4 V
load transient recovery time
(t
tr
)
V
I
= 53 V, load step 25-75-25% of max I
O
, di/dt =
1 A/μs
150 µs
ramp-up time (t
r
) - (from
10−90% of V
Oi
)
10-100% of max I
O
, T
P1
= 25ºC, V
I
= 53 V 23 ms
start-up time (t
s
) - (from V
I
connection to 90% of V
Oi
)
10-100% of max I
O
, T
P1
= 25ºC, V
I
= 53 V 39 ms
V
I
shut-down fall time (t
f
) -
(from V
I
off to 10% of V
O
)
max I
O
I
O
= 0 A, C
O
= 0 mF
3
7
ms
s
RC start-up time (t
RC
) max I
O
27 ms
RC shut-down fall time (t
RC
) -
(from RC off to 10% of V
O
)
max I
O
I
O
= 0 A, C
O
= 0 mF
4.5
7
ms
s
output current (I
O
) 0 39 A
current limit threshold (I
lim
) V
O
= 10.8 V, T
P1
, T
P3
< max T
P1
, T
P3
41 44 47 A
short circuit current (I
sc
) T
P1
= 25ºC, see Note 1 14 A
recommended capacitive load
(C
out
)
T
P1
= 25ºC, see Note 2 0.1 3.9 6 mF
output ripple & noise (V
Oac
) See ripple & noise section, max I
O
, see Note 3 50 110 mVp-p
over voltage protection (OVP) T
P1
, T
P3
= 25°C, V
I
= 53 V, 10-100% of max I
O
15.6 V
remote control (RC)
sink current (note 4), see operating information
trigger level, decreasing RC-voltage
trigger level, increasing RC-voltage
2.6
2.9
0.7 mA
V
V
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