APPLICATION NOTES
WALL INDUSTRIES, INC.
L P Q S E R I E S
Technical Specifications
Model No. LPQ48S5-50R
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
NOM
MAX
Unit Measured
INPUT
Turn on at
35
34
Volt DC
Volt DC
Turn off at
Input Over voltage Shutdown
Turn off at
n/a
n/a
48
1.55
74
1
Volt DC
Volt DC
Volt DC
A
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
Rated Input Voltage
Low Line 100% load
36
75
mA
mA
1
A2 Sec
mA
12 uH / 33 uF input filter
4
Output Voltage Set point
Output Voltage Regulation
Over Load
4.95
5
5.05
Volt DC
± 0.2
± 0.2
0.02
%
%
Over Line
Over Temperature
Output Voltage Ripple and Noise
Basic Ripple
% / oC
47
60
100
100
10
mV
mV
A
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
Rated Output Current
Self Resetting
0
11
13
15
A
A/sec
120 Hz
60
dB
X
X
50 to 75%
75 to 50%
50 to 100%
100 to 50 %
75
60
50
65
0
mV
mV
µsec
msec
%
Load step / ∆ V
Recovery Time
To within 1% Rated Vo
Turn on Delay
From Vin(nom) to 90% Vout (nom)
Full Load Resistive
Overshoot of Output Voltage
EFFICIENCY
@ 100% load
92
91
88
80
%
%
%
%
@ 75% load
@ 50% load
@ 25% load
TEMPERATURE CONSIDERATIONS
Thermal Resistance
Normal Convection
100 lfm
oC/Watt
oC/Watt
oC/Watt
oC/Watt
oC/Watt
Rθc-a
200 lfm
300 lfm
400 lfm
Heatsink Considerations
General Technical Data
Switching Frequency
Remote ON OFF Control
Trimmablility
Available, Contact Factory
Fixed
330
KHz
High/Low TTL
Volt DC
oC
Acitve HIGH or LOW
4.5
5.5
Over Temperature Shutdown
MTBF
PCB Temperature
Bellcore TR-332
125
1.81 E6
Hours
1
(888) 597-WALL
www.wallindustries.com