MVAC400-24AF【PDF 3/7 页】AC/DC CONVERTER 400W 24V

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MVAC400 Series

400W 3" x 5" High Density AC-DC Power Supply Converter

EMISSIONS AND IMMUNITY

Characteristic

Input Current Harmonics

Voltage Fluctuation and Flicker

Conducted Emissions

ESD Immunity

Radiated Field Immunity

Electrical Fast Transient Immunity

Surge Immunity

Radiated Field Conducted Immunity

Magnetic Field Immunity

Voltage dips, interruptions

Standard

IEC/EN 61000-3-2

IEC/EN 61000-3-3

EN 55022

FCC Part 15

IEC/EN 61000-4-2

IEC/EN 61000-4-3

IEC/EN 61000-4-4

IEC/EN 61000-4-5

IEC/EN 61000-4-6

IEC/EN 61000-4-8

IEC/EN 61000-4-11

Compliance

Class A

Complies

Class B

Class B

Level 4, Criterion 2

Level 3, Criterion A

Level 4, Criterion A

Level 3, Criterion A

Level 3, 10V/m, Criterion A

Level 3, Criterion A

Level 3, Criterion B

EMI CONSIDERATIONS

For optimum EMI performance, the power supply should be mounted to a metal plate grounded to all 4 mounting holes of the power supply. To comply with safety standards, this

plate must be properly grounded to protective earth (see mechanical dimension notes). Pre-compliance testing has shown the stand-alone power supply to comply with EN55022

class A radiated emissions. Class B radiated emissions are achievable with a metal enclosure. Radiated emission results vary with system enclosure and cable routing paths.

SAFETY CONSIDERATIONS

1. This power supply is a component level power supply intended for use in class I or class II applications. Secondary ground traces need to be suitably isolated

from primary ground traces when used in class II applications.

2. When the power supply is used in class II equipment, all ground traces and components connected to the primary side are considered primary for spacing and

insulation considerations.

STATUS AND CONTROL SIGNALS

Parameter

PS_ON

PWR_OK

Conditions

This signal must be sinked low (>2mA) to +5V_AUX_RTN to turn on the main and Fan (V2) output. The +5V_AUX output is independent of the PS_ON signal, and

comes up automatically when the input AC or input DC voltage is applied within their speci?ed operating ranges.

Open collector logic goes high 50-200 msec after main output is in regulation; it goes low at least 6 msec before loss of regulation. Internal 10K pull up to

+5V_AUX is provided. Applications using PWR_OK signal should maintain a minimum load of 5W on the main or fan output.

1. Noise and ripple is measured at an oscilloscope jack on the output, 20MHz bandwidth, and with

0.1μF ceramic and 10μF aluminum electrolytic capacitors across the output pins.

2. Unless otherwise speci?ed all measurements are taken at 120Vac input and 25°C ambient

temperature.

3. Fan (V2) regulation band applies from 0.1A to 1A load with a minimum of 10W load on the main

(V1) output.

4. Fan (V2) has overvoltage protection (tracking V1) and short circuit protection. Overloading the Fan

(V2) output can result in permanent damage to the unit.

6. Load regulation for droop version models (MVAC400-xxAFD) is based the calculated droop voltage

±1.5% (see current sharing section for droop characteristics).

7. No load Input power varies by model and by input line. Measurement is dif?cult to make due to burst

mode operation. Please contact Murata sales if additional information is required.

8. All three output returns are isolated from each other (see isolation characteristics section); the

returns may be tied together externally.

9. Load steps beginning from combined loads on the main and fan outputs of less than 5W may

result in transient undershoots outside of the spec limits.

5. 24V and 50V models may exhibit up to 5% turn on overshoot for loads less than 4% of full load.

www.murata-ps.com/support

MVAC400.A10 Page 3 of 7

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