UWS-5/10-Q48PM-C【PDF 14/25 页】DC/DC CONVERTER 5V 10A ISOLATED

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UWS Series

Sixteenth-brick DOSA-Compatible,

Wide Input Isolated DC-DC Converters

Performance Speci?cation Notes

1. All speci?cations are typical unless noted. Ambient temperature =

+25°Celsius, V IN is nominal, output current is maximum rated nominal.

External output capacitance is 1 μF multilayer ceramic paralleled with

10?μF electrolytic. All caps are low ESR. These capacitors are necessary for

our test equipment and may not be needed in your application.

Testing must be kept short enough that the converter does not appreciably

heat up during testing. For extended testing, use plenty of air?ow. See

Derating Curves for temperature performance. All models are stable and

regulate within spec without external cacacitance.

2. Input Ripple Current is tested and speci?ed over a 5-20 MHz bandwidth

and uses a special set of external ?lters only for the Ripple Current speci-

?cations. Input ?ltering is C IN = 33 μF, C BUS = 220 μF, L BUS = 12?μH. Use

capacitor rated voltages which are twice the maximum expected voltage.

Capacitors must accept high speed AC switching currents.

3. Note that Maximum Current Derating Curves indicate an average current

at nominal input voltage. At higher temperatures and/or lower air?ow, the

converter will tolerate brief full current outputs if the average RMS current

over time does not exceed the Derating curve. All Derating curves are

presented at sea level altitude. Be aware of reduced power dissipation

with increasing density altitude.

4. Mean Time Before Failure (MTBF) is calculated using the Telcordia

(Belcore) SR-332 Method 1, Case 3, Issue 1, ground ?xed conditions. Oper-

ating temperature = +30°C, full output load, natural air convection.

5. The output may be shorted to ground inde?nitely with no damage. The

Output Short Circuit Current shown in the speci?cations is an average con-

sisting of very short bursts of full rated current to test whether the output

circuit can be repowered.

6. The On/Off Control is normally driven from a switch or relay. An open

collector/open drain transistor may be used in saturation and cut-off

(pinch-off) modes. External logic may also be used if voltage levels are

fully compliant to the speci?cations.

7. Regulation speci?cations describe the deviation as the input line voltage

or output load current is varied from a nominal midpoint value to either

extreme (50% load).

8. Do not exceed maximum power ratings or output overvoltage when adjust-

ing output trim values.

9. At zero output current, Vout may contain components which slightly

exceed the ripple and noise speci?cations.

10. Output overload protection is non-latching. When the output overload

is removed, the output will automatically recover.

11. All models are fully operational and meet published speci?cations,

including “cold start” at –40°C.

12. The converter will shut off if the input falls below the undervoltage thresh-

old. It will not restart until the input exceeds the Input Start Up Voltage.

13. Short circuit shutdown begins when the output voltage degrades approxi-

mately 2% from the selected setting.

14. Output noise may be further reduced by installing an external ?lter. See

the Application Notes. Use only as much output ?ltering as needed and no

more . Larger caps (especially low-ESR ceramic types) may slow transient

response or degrade dynamic performance. Thoroughly test your applica-

tion with all components installed.

15. To avoid damage or unplanned shutdown, do not sink appreciable reverse

output current.

16. If reverse polarity is accidentally applied to the input, to ensure reverse

input protection with full output load, always connect an external fast blow

input fuse in series with the +V IN input.

17. Although extremely unlikely, failure of the internal components of this

product may expose external application circuits to dangerous voltages,

currents, temperatures or power levels. Please thoroughly verify all ap-

plications before committing them to service. Be sure to include appropri-

ately-rated FUSES (see speci?cations and Application Notes) to reduce the

risk of failure.

18. If remote sense is not used, connect it to its respective Vout terminal.

Sense is included on UWS-3.3/15-Q48 and UWS-5/10-Q48 models only.

19 Output Ripple and Noise for the UWS-5/10-Q48 model with a 1uF and

100uF Tantalum Output Capacitor is 65mVp-p (Typical).

www.murata-ps.com/support

MDC_UWS Series.C03 Page 14 of 25

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