APPLICATION NOTES

WALL INDUSTRIES, INC.

(888) 597-WALL

www.wallindustries.com

2

Technical Specifications

M

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

Volt DC

Turn off at

34

Volt DC

Input Over voltage Shutdown

Turn off at

n/a

Volt DC

Turn on at

n/a

Volt DC

Operating Voltage Range

Rated Input Voltage

36

48

75

Volt DC

Maximum Input Current

Low Line 100% load

3

A

No Load Input Current

94

mA

Input Current under “LOGIC OFF”

1

mA

Inrush Current Transient Rating

1

A

Reflected Ripple Current

12uH / 33 uF input filter

6

mA

OUTPUT

Output Voltage Set point

4.95

5

5.05

Volt DC

Output Voltage Regulation

Over Load

± 0.2

%

Over Line

± 0.2

%

Over Temperature

0.02

% /

Output Voltage Ripple and Noise

Basic Ripple

70

150

mV

Spikes P-P

100

150

mV

Output Current Ranges

Rated Output Current

0

20

A

Output Current Limit

Self Resetting

22

26

30

A

Short Term Output Current Surge

A/sec

DYNAMIC CHARACTERISTICS

Input Voltage Ripple Rejection

120 Hz

60

dB

Output Transient and Load Changes

Load step /

V

X

50 to 75%

50 to 100%

130

mV

Load step /

V

X

75 to 50%

100 to 50 %

90

mV

Recovery Time

To within 1% Rated Vo

50

sec

Turn on Delay

From Vin(nom) to 90% Vout (nom)

25

msec

Overshoot of Output Voltage

Full Load Resistive

0

%

EFFICIENCY

@ 100% load

91

%

@ 75% load

92

%

@ 50% load

92

%

@ 25% load

87

%

TEMPERATURE CONSIDERATIONS

Thermal Resistance

Normal Convection

R c-a

100 lfm

200 lfm

300 lfm

400 lfm

Heatsink Considerations

Available, Contact Factory

General Technical Data

Switching Frequency

Fixed

330

KHz

Remote ON OFF Control

Acitve HIGH or LOW

High/Low TTL

Trimmablility

4.5

5.5

Volt DC

Over Temperature Shutdown

PCB Temperature

125

MTBF

Bellcore TR-332

1.81 E6

Hours

MPQ48S5-100R

Rev

B

Note: Positive Remote ON/OFF control is standard. To order negative logic Remote ON/OFF control add the suffix "R" to the part number.