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NDS03ZG-M6

NDS Series: 10W / 3.0A DC/DC Converters 36-75V Input 1.5V, 1.8V, 2.5V, 3.3V and 5.0V Outputs

Power-One Inc. 

NDS Series: 10W / 3.0A DC/DC Converters

36-75V Input

1.5V, 1.8V, 2.5V, 3.3V and 5.0V Outputs

Product Specifications

Nov 2001

Safety Considerations

EMC Specifications

These converters feature 1500 Volt DC isolation

from input to output. The input to output resistance

is greater than 10MOhm. These converters are

provided with Operational Insulation between input

and output circuits according to EN60950 / UL1950

/ CSA60950-00. Nevertheless, if the system using

the converter needs to receive safety agency

approval, certain rules must be followed in the

design of the system. In particular, all of the

creepage and clearance requirements of the end-

use safety requirements must be observed. These

documents include UL60950, CSA60950-00 and

EN60950, although specific applications may have

additional requirements.

In order for the output of the converter to be

considered as SELV (Safety Extra Low Voltage) or

TNV-1, according to EN60950 / UL1950 /

CSA60950-00, one of the following requirements

must be met in the system design:

• The converter has no internal fuse. An external

fuse must be provided to protect the system

from catastrophic failure. A fuse with a rating

not greater than 2.0A is recommended. The

user can select a lower rating fuse based upon

the inrush transient and the maximum input

current of the converter, which occurs at the

minimum input voltage. Both input traces and

the chassis ground trace (if applicable) must be

capable of conducting a current of 1.5 times the

value of the fuse without opening. The fuse

must not be placed in the grounded input line, if

any.

• If the voltage source feeding the module is

SELV, the output of the converter is considered

SELV and may be grounded or ungrounded.

• The circuitry of the converter may generate

transients, which exceed the input voltage.

Even if the input voltage is SELV (<60V) the

components on the primary side of the converter

may have to be considered as hazardous. A

safety interlock may be needed to prevent the

user from accessing the converter while

operational.

Conducted Noise:

The converters meet the requirements of

EN55022, CISPR22 and FCC CFR title 47 part 15

Sub-part J - Conducted (conducted noise on the

input terminals) without any external components.

The results for this solution are displayed below.

To meet level B for the above standards it is

necessary to fit a 5µF ceramic capacitor across the

input terminals.

dbµV

80

70

60

50

40

30

20

10

0

1.E+00.51

Conducted EMI (Input Terminals)

EN55022 A QP.

EN55022 A AV.

1.E1+06

1.E1+007

FREQ (MHz)

30

1.E+08

Electromagnetic Susceptibility:

Standard

Electrostatic

Discharge

EN61000-4-2

Electromagnetic

Field

EN61000-4-3

Electrical Fast

Transient

EN61000-4-4

Applied

Stress

2KV to

pins

3V/m

2000 Vp

to input

Class Performance

Level Outcome *

1

B

2

A

3

B

Conducted

Disturbances

EN61000-4-6

3Vrms to

input

2

B

* A denotes normal operation, no deviation from

specification. B denotes temporary deviation from

specification is possible.

5-Nov-01

Rev 1.1

www.power-one.com

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