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APPLICATION NOTES
QAW SERIES
Model No. QAW48S12-40
Technical Specifications
All specifications are based on 25C, Nominal Line and Full Load unless otherwise noted.
We reserve the right to change specifications based on technological advances.
SPECIFICATION
Related condition
MIN
INPUT
Turn on at
Turn off at
Input Over voltage Shutdown
Turn off at
Turn on at
Operating Voltage Range
Maximum Input Current
No Load Input Current
Input Current under “LOGIC OFF”
Inrush Current Transient Rating
Reflected Ripple Current
OUTPUT
Output Voltage Set point
Output Voltage Regulation
Over Load
Over Line
Over Temperature
Output Voltage Ripple and Noise
Basic Ripple
Spikes P-P
Output Current Ranges
Output Current Limit
Short Term Output Current Surge
DYNAMIC CHARACTERISTICS
Input Voltage Ripple Rejection
Output Transient and Load Changes
Load step / ' V
Load step / ' V
Recovery Time
Turn on Delay
Overshoot of Output Voltage
EFFICIENCY
@ 100% load
@ 75% load
@ 50% load
@ 25% load
TEMPERATURE CONSIDERATIONS
Thermal Resistance
Normal Convection
100 lfm
200 lfm
300 lfm
400 lfm
Heatsink Considerations
General Technical Data
Switching Frequency
Remote ON OFF Control
Trimmablility
Over Temperature Shutdown
MTBF
Rated Input Voltage
Low Line 100% load
18
20 MHz w/low source impedance
11.88
NOM
MAX
16.5
15.6
Volt DC
Volt DC
77.6
76
48
2.7
25
5
1
1060
Volt DC
Volt DC
Volt DC
A
mA
mA
2
A Sec
mA
12
75
12.12
± 0.5
± 0.5
0.02
Rated Output Current
Self Resetting
0.333
4.333
Unit Measured
60
70
5
Volt DC
%
%
% / oC
100
100
3.333
5.667
mV
mV
A
A
A/sec
120 Hz
60
dB
50 to 75%
50 to 100%
75 to 50%
100 to 50 %
To within 1% Rated Vo
From Vin(nom) to 90% Vout (nom)
Full Load Resistive
60
50
150
47
0
mV
mV
Psec
msec
%
84
83
82
77
%
%
%
%
X
X
RTc-a
6.72
o
320
KHz
TTL
Volt DC
o
C
C/Watt
C/Watt
o
C/Watt
o
C/Watt
o
C/Watt
o
Available, Contact Factory
Fixed
Active HIGH, Open Collector
11.4
12.6
105
Case Temperature
Bellcore TR-332
3.51E6
Wall Industries, Inc. 5 Watson Brook Road Exeter, NH 03833
603-778-2300 www.wallindustries.com Fax 603-778-9797
Hours
1
APPLICATION NOTES
QAW SERIES
OUTPUT POWER (WATTS)
DERATING CURVE
50
40
30
20
10
0
0
20
40
60
80
100
AMBIENT TEMPERATURE (DEG. C.)
POWER DISSIPATION VS OUTPUT CURRENT
POWER DISSIPATION (WATTS)
10
9
8
7
6
5
4
3
2
1
0
Low Line
Nominal
Line
High
Line
0
1
2
3
OUTPUT CURRENT (AMPS)
EFFICIENCY VS OUTPUT CURRENT
Low Line
EFFICIENCY (%)
85
75
Nominal
Line
65
55
High
Line
45
0
1
2
3
OUTPUT CURRENT (AMPS)
Wall Industries, Inc. 5 Watson Brook Road Exeter, NH 03833
603-778-2300 www.wallindustries.com Fax 603-778-9797
2
APPLICATION NOTES
QAW SERIES
TYPICAL OUTPUT RIPPLE
50mV/div, 2uS/div, full load, 18Vin
0.1uF decoupling cap at room temp
TYPICAL OUTPUT RIPPLE
50mV/div, 2uS/div, full load 75Vin
0.1uF decoupling cap at room temp
TYPICAL INPUT RIPPLE CURRENT
200mA/div, 1uS/div, full load 48Vin at
room temp with a low source impedance
TYPICAL TRANSIENT RESPONSE
50mV/div, 200uS/div, 50% full load
to 75% full load 48Vin room temp
TYPICAL RISE TIME & TURN-ON DELAY
USING LOGIC ENABLE
2V/div, 100mS/div (Vout), 2V/div 100mS/div (logic
enable) 18Vin, full load at room temp
TYPICAL RISE TIME & TURN-ON DELAY
WITH Vin 0-48V
2V/div, 100mS/div (Vout), 10V/div, 100mS/div (Vin)
at room temp
Wall Industries, Inc. 5 Watson Brook Road Exeter, NH 03833
603-778-2300 www.wallindustries.com Fax 603-778-9797
3
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