Datasheet

cui.com
date 11/07/2014 │ page 5 of 36CUI Inc │ SERIES: NQB-D │ DESCRIPTION: FULLY REGULATED ADVANCED BUS CONVERTERS
Functional Description
T
P1
, T
P3
= -40 to +90ºC, V
I
= 36 to 75 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
Conguration File: 190 10-CDA 102 0314/001
parameter conditions/description min typ max units
PMBus monitoring accuracy
input voltage (VIN_READ) -2 ±0.2 2 %
output voltage (VOUT_READ) V
I
= 53V -1.0 ±0.1 1.0 %
output current (IOUT_READ)
V
I
= 53V, 50-100% of max I
O
V
I
= 53V, 10% of max I
O
-6
-0.6
±0.15 6
0.6
%
A
temperature (TEMP_READ) -5 ±3.5 5 ºC
fault protection
characteristics
input under voltage lockout
(UVLO)
factory default
setpoint accuracy
hysteresis: factory default
hysteresis: congurable via PMBus of threshold
range, note 1
delay
-2
0
33
2
300
2
V
%
V
V
μs
output voltage - under voltage
protection (VOUT_UV_FAULT_
LIMIT)
factory default
congurable via PMBus, note 1
fault response time
0
0
200
16
V
V
μs
output voltage - over voltage
protection (VOUT_OV_FAULT_
LIMIT)
factory default
congurable via PMBus, note 1
fault response time
V
OUT
15.6
200
16
V
V
μs
over current protection (OCP)
setpoint accuracy (I
O
)
IOUT_OC_FAULT_LIMIT factory default
IOUT_OC_FAULT_LIMIT, congurable via PMBus,
note 1
fault response time
-6
0
41
200
6
100
%
A
A
μs
over temperature protection
(OTP)
OTP_FAULT_LIMIT, factory default
OTP_FAULT_LIMIT, congurable via PMBus, note 1
hysteresis, factory default
hysteresis, congurable via PMBus, note 1
fault response time
-50
0
125
10
300
125
125
ºC
ºC
ºC
ºC
μs
logic input/output
characteristics
logic input low (V
IL
) CTRL, SA0, SA1, PG, SCL, SDA 1.1 V
logic input high (V
IH
) CTRL, SA0, SA1, PG, SCL, SDA 2.1 V
logic output low (V
OL
)
CTRL, PG, SALERT, SCL, SDA
I
OL
= 6 mA
0.25 V
logic output high (V
OH
)
CTRL, PG, SALERT, SCL, SDA
I
OH
= -6 mA
2.7 V
bus free time T(BUF) note 2 1.3 μs
Note 1: See Operating Information section.
2: PMBus timing parameters according to PMBus spec.
For more information, please visit the product page.