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APPLICATION NOTES
QAW SERIES
M odel N o. QAW24D5-40
SPECIFICATION
Related condition
MIN
INPUT
Turn on at
NOM
MAX
Unit Measured
8.85
8.62
Volt DC
39
38
0.2
24
5.8
30
<1
1
1080
Volt DC
Volt DC
Volt DC
Volt DC
A
mA
mA
2
A Sec
mA
Input Over voltage Shutdown
Turn on at
Voltage Hysteresis
Operating Voltage Range
Maximum Input Current
No Load Input Current
Input Current under “LOGIC OFF”
Inrush Current Transient Rating
Rated Input Voltage
Low Line 100% load
9
20 MHz w/low source impedance
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
±4.9
±5
±5.1
±1
±1
0.02
with balanced loads
15
25
Rated Output Current
Self Resetting
36
±0.4
±5.2
±6
Volt DC
%
%
% / oC
100
100
±4
±6.8
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
60
220
220
0
mV
mV
sec
msec
%
80
81
79
75
%
%
%
%
X
X
o
4.81
R c-a
C/Watt
C/Watt
o
C/Watt
o
C/Watt
o
C/Watt
o
Available, Contact Factory
360
Fixed
Active HIGH, Open Collector
±4.75
±5.25
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
KHz
TTL
Volt DC
o
C
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)
14
Low Line
12
10
8
Nominal
Line
6
4
High
Line
2
0
0
1
2
3
4
5
6
7
8
OUTPUT CURRENT (AMPS)
EFFICIENCY VS OUTPUT CURRENT
Low Line
EFFICIENCY (%)
80
70
Nominal
Line
60
50
High
Line
40
0
1
2
3
4
5
6
7
8
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
10mV/div, 1uS/div, full load, 9Vin
0.1uF decoupling cap at room temp
measured at positive output (+Vout)
TYPICAL OUTPUT RIPPLE
10mV/div, 1uS/div, full load 36Vin
0.1uF decoupling cap at room temp
measured at positive output (+Vout)
TYPICAL INPUT RIPPLE CURRENT
200mA/div, 1uS/div, full load 24Vin at
room temp with a low source impedance
TYPICAL TRANSIENT RESPONSE
50mV/div, 200uS/div, 50% full load
to 75% full load 24Vin room temp
measured across both outputs (+Vout to –Vout)
TYPICAL RISE TIME & TURN-ON DELAY
USING LOGIC ENABLE
2V/div, 40mS/div (Vout), 2V/div 40mS/div (logic
enable) 9Vin, full load at room temp
TYPICAL RISE TIME & TURN-ON DELAY
WITH Vin 0-24V
2V/div, 40mS/div (Vout), 10V/div, 40mS/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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