TYPICAL PERFORMANCE DATA

Efficiency and Power Dissipation @ +25°C

Maximum Current Temperature Derating vs. Airflow (Vin=Vnom., airflow direction is

from -Vin to +Vin, with baseplate, at sea level)

0

5

10

15

20

25

30

30

35

40

45

50

55

60

65

70

75

80

85

100 LFM

200 LFM

300 LFM

400 LFM

Maximum Current Temperature Derating vs. Airflow (Vin=Vnom., airflow direction is

from Vin to Vout, no baseplate, at sea level)

0

5

10

15

20

25

30

30

35

40

45

50

55

60

65

70

75

80

85

100 LFM

200 LFM

300 LFM

400 LFM

Power On Startup Delay Output

(Vin = 0 to 48V, Iout = 25A, Cload = 0, Ta = +25°C)

75

65

70

80

85

90

95

100

15

5

10

20

25

30

35

40

3

5

7

9

11

13

15

17

19

21

23

25

Power Dissipation

Iout (Amps)

HPQ-12/25-D48 Series

Isolated 300-Watt Quarter Brick DC/DC Converters

www.murata-ps.com

email: sales@murata-ps.com

09 Nov 2010

MDC_HPQ-12/25-D48 Series.A03 Page 6 of 12

Notes

➀ Unless otherwise noted, all specifications apply over the input voltage range, full temperature

range, nominal output voltage and full output load. General conditions are near sea level altitude,

no base plate installed and natural convection airflow unless otherwise specified. All models are

tested and specified with external parallel 1 μF and 10 μF multi-layer ceramic output capacitors.

No external input capacitor is used (see Application Notes). All capacitors are low-ESR types wired

close to the converter. These capacitors are necessary for our test equipment and may not be

needed in the user’s application.

➁ Input (back) ripple current is tested and specified over 5 Hz to 20 MHz bandwidth. Input filtering is

Cin = 33 μF, Cbus = 220μF and Lbus = 4.7 μH.

➂ All models are stable and regulate to specification under no load.

➃ The Remote On/Off Control is referred to -Vin.

➄ Regulation specifications describe the output voltage changes as the line voltage or load current

is varied from its nominal or midpoint value to either extreme. The load step is ±25% of full load

current.

➅ Output Ripple and Noise is measured with Cout = 1μF MLCC paralleled with 10μF tantalum, 20

MHz oscilloscope bandwidth and full resistive load.

➆ The Sense and Trim pins are removed for the “X” model option.

➇ NOTICE—Please use only this customer data sheet as product documentation when laying out your

printed circuit boards and applying this product into your application. Do NOT use other materials as

official documentation such as advertisements, product announcements, or website graphics.

We strive to have all technical data in this customer data sheet highly accurate and complete. This cus-

tomer data sheet is revision-controlled and dated. The latest customer data sheet revision is normally

on our website (www.murata-ps.com) for products which are fully released to Manufacturing. Please be

especially careful using any data sheets labeled “Preliminary” since data may change without notice.

The pinout (Pxx) and case (Cxx) designations (typically P65 or C59) refer to a generic family of

closely related information. It may not be a single pinout or unique case outline. Please be aware

of small details (such as Sense pins, Power Good pins, etc.) or slightly different dimensions

(baseplates, heat sinks, etc.) which may affect your application and PC board layouts. Study the

Mechanical Outline drawings, Input/Output Connection table and all footnotes very carefully.

Please contact Murata Power Solutions if you have any questions.