Wall Industries, Inc. 5 Watson Brook Road Exeter, NH 03833

603-778-2300 www.wallindustries.com Fax 603-778-9797

MSKW Series

5 Watt DC/DC Converter

Single and Dual Outputs

2:1 Wide Input Voltage Range

Rev A

FEATURES

● SMT Technology

● High Power Density

● Efficiency up to 85%

● 1500VDC I/O Isolation

● Short Circuit Protection

● Remote ON/OFF Control

● MTBF > 1,000,000 Hours

● Industry Standard Pin-out

● 2:1 Wide Input Voltage Range

● EMI Complies with EN55022 Class A

● Operating Temperature: -40°C to +71°C

SPECIFICATIONS: MSKW Series

All specifications are based on 25°C, Nominal Input Voltage, and Maximum Output Current unless otherwise noted.

We reserve the right to change specifications based on technological advances.

SPECIFICATION

TEST CONDITIONS

Min

Nom

Max

Unit

12V nominal input models

9

12

18

24V nominal input models

18

24

36

Input Voltage Range

48V nominal input models

36

48

75

VDC

12V nominal input models

7.5

8

9

24V nominal input models

14

16

18

Start Voltage

48V nominal input models

30

33

36

VDC

12V nominal input models

6.5

7

8

24V nominal input models

13

15

17

Under Voltage Shutdown

48V nominal input models

28

31

34

VDC

12V nominal input models

-0.7

25

24V nominal input models

-0.7

50

Input Surge Voltage (1000ms)

48V nominal input models

-0.7

100

VDC

Reverse Polarity Input Current

All models

1

A

Input Filter

All models

Pi Filter

Reflected Ripple Current

See Rating Chart

Short Circuit Input Power

All models

1000

3000

mW

Output Voltage

See Rating Chart

Output Voltage Accuracy

±0.5

±1.0

%

Output Voltage Balance

Dual Output, Balanced Loads

±0.5

±2.0

%

Load Regulation

Io = 20% to 100%

±0.3

±1.0

Line Regulation

Vin = min. to max.

±0.1

±0.3

%

Output Power

5

W

Output Current

See Rating Chart

Ripple & Noise (20MHz)

50

85

Ripple & Noise (20MHz)

Over Line, Over Load, and Over Temperature

100

Ripple & Noise (20MHz)

15

mVrms

Transient Response Deviation

25% Load Step Change

±2

±6

%

Transient Recovery Time

25% Load Step Change

250

500

µs

REMOTE ON/OFF CONTROL

Supply On

2.5 to 5.5VDC or open circuit

Supply Off

-0.7

0.8

VDC

Device Standby Input Current

10

mA

Control Input Current (ON)

Vin = min to max

-200

µA

Control Input Current (OFF)

Vin = min to max

-300

µA

Control Common

Referenced to negative input

PROTECTION

Short Circuit Protection

continuous

Over Power Protection

115

140

165

%

12V nominal input models

1500mA slow-blow type

24V nominal input models

700mA slow-blow type

Input Fuse Recommendation

48V nominal input models

350mA slow-blow type

GENERAL

Efficiency

See Rating Chart

Switching Frequency

200

260

350

KHz

Isolation Voltage Rated

60 seconds

1500

VDC

Isolation Voltage Test

Flash Test for 1 second

1650

VDC

Isolation Resistance

500VDC

1000

MΩ

Isolation Capacitance

100KHz, 1V

650

750

pF

Internal Power Dissipation

2500

mW

Max. Capacitive Load

See Rating Chart

DESCRIPTION

The MSKW series of DC/DC converters provide a maximum of 5 watts in a

“gull-wing” SMT package. These converters operate over 2:1 wide input

voltage ranges of 9-18, 18-36, or 36-75VDC. This series also has single

output voltages of 3.3, 5, 12, and 15VDC and dual output voltages of ±5,

±12, and ±15VDC. These converters have a typical full load efficiency of

85%, remote ON/OFF, and continuous short circuit protection. The

-40°C~+71°C operating temperature make these converters ideal for data

communication equipment, mobile battery driven equipment, process/machine

control equipment, telecommunication equipment, computer peripheral systems,

distributed power systems, mixed analog/digital subsystems, and industrial robot systems. The

EN55022 Class A conducted noise compliance minimizes design time, cost, and eliminates the need

for external filter components.