SW003A0A94(2008) データシートの表示（PDF） - Unspecified

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SW003A0A94
(Rev.:2008)

SW/SC001/003 Series DC-DC Converter Power Modules: 18-36V & 36-75Vdc Input; 3.3V-15Vdc Output; 1-3.5A Output Current

Unspecified 

Data Sheet

SW/SC001/003 Series DC-DC Power Module:

December 12, 2008 18-36Vdc & 36-75Vdc Input; 3.3-15Vdc Output; 1-3.5A Output Current

Test Configurations

TO OSCILLOSCOPE

LTEST

12μH

CURRENT PROBE

Vin+

CS 220μF

E.S.R.<0.1Ω

@ 20°C 100kHz

33μF

Vin-

Design Considerations

Input Source Impedance

The power module should be connected to a low

ac-impedance source. Highly inductive source

impedance can affect the stability of the power module.

For the test configuration in Figure 43, a 33μF

electrolytic capacitor (ESR<0.7Ω at 100kHz), mounted

close to the power module helps ensure the stability of

the unit. Consult the factory for further application

guidelines.

NOTE: Measure input reflected ripple current with a simulated

source inductance (LTEST) of 12μH. Capacitor CS offsets

possible battery impedance. Measure current as shown

above.

Figure 43. Input Reflected Ripple Current Test Setup.

COPPER STRIP

VO (+)

V O (–)

1uF .

10uF

SC O PE

RESISTIVE

LO A D

GROUND PLANE

NOTE: All voltage measurements to be taken at the module

terminals, as shown above. If sockets are used then

Kelvin connections are required at the module terminals

to avoid measurement errors due to socket contact

resistance.

Figure 44. Output Ripple and Noise Test Setup.

Rdistribution Rcontact

Vin+

Vout+

Rcontact Rdistribution

VIN

VO

RLOAD

Rdistribution Rcontact

Vin-

Vout-

Rcontact Rdistribution

NOTE: All voltage measurements to be taken at the module

terminals, as shown above. If sockets are used then

Kelvin connections are required at the module terminals

to avoid measurement errors due to socket contact

resistance.

Figure 45. Output Voltage and Efficiency Test Setup.

Efficiency η =

VO. IO

VIN. IIN

x 100 %

Safety Considerations

For safety-agency approval of the system in which the

power module is used, the power module must be

installed in compliance with the spacing and separation

requirements of the end-use safety agency standard,

i.e., UL 60950-1-3, CSA C22.2 No. 60950-00, and VDE

0805 (IEC60950, 3rd Edition).

If the input source is non-SELV (ELV or a hazardous

voltage greater than 60 Vdc and less than or equal to

75Vdc), for the module’s output to be considered as

meeting the requirements for safety extra-low voltage

(SELV), all of the following must be true:

ƒ The input source is to be provided with reinforced

insulation from any other hazardous voltages,

including the ac mains.

ƒ One VIN pin and one VOUT pin are to be grounded,

or both the input and output pins are to be kept

floating.

ƒ The input pins of the module are not operator

accessible.

ƒ Another SELV reliability test is conducted on the

whole system (combination of supply source and

subject module), as required by the safety agencies,

to verify that under a single fault, hazardous

voltages do not appear at the module’s output.

Note: Do not ground either of the input pins of the

module without grounding one of the output pins.

This may allow a non-SELV voltage to appear

between the output pins and ground.

The power module has extra-low voltage (ELV) outputs

when all inputs are ELV.

For input voltages exceeding –60 Vdc but less than or

equal to –75 Vdc, these converters have been evaluated

to the applicable requirements of BASIC INSULATION

between secondary DC MAINS DISTRIBUTION input

(classified as TNV-2 in Europe) and unearthed SELV

outputs.

The input to these units is to be provided with a

maximum 3A time-delay fuse in the ungrounded lead.

LINEAGE POWER

13

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