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 4 of 12

FUNCTIONAL SPECIFICATIONS

ABSOLUTE MAXIMUM RATINGS

Conditions

➀

Minimum

Typical/Nominal

Maximum

Units

Input Voltage, Continuous

Full power operation

36

75

Vdc

Input Voltage, Transient

Operating or non-operating,

100 mS max. duration

100

Vdc

Isolation Voltage

Input to output tested 100 mS

2250

Vdc

Input Reverse Polarity

None, install external fuse

None

Vdc

On/Off Remote Control

Power on or off, referred to -Vin

0

15

Vdc

Output Power

0

300

W

Output Current

Current-limited, no damage,

short-circuit protected

025

A

Storage Temperature Range

Vin = Zero (no power)

-55

125

°C

Absolute maximums are stress ratings. Exposure of devices to greater than any of these conditions may adversely affect long-term reliability. Proper operation under conditions other than those

listed in the Performance/Functional Specifications Table is not implied or recommended.

INPUT

Conditions

➀ ➂

Operating voltage range

36

48

75

Vdc

Recommended External Fuse

Fast blow

20

A

Start-up threshold

Rising input voltage

33

34

35

Vdc

Undervoltage shutdown

Falling input voltage

31

32

34

Vdc

Overvoltage protection

Rising input voltage

None

Vdc

Reverse Polarity Protection

None, install external fuse

None

Vdc

Internal Filter Type

Pi-type

Input current

Full Load Conditions

Vin = nominal

6.61

6.82

A

Low Line

Vin = minimum

8.82

9.09

A

Inrush Transient

Vin = 48V.

0.3

A2-Sec.

Output in Short Circuit

50

100

mA

No Load

Iout = minimum, unit=ON

150

250

mA

Standby Mode (Off, UV, OT)

510

mA

Reflected (back) ripple current

➁

Measured at input with specified filter

50

70

mA, RMS

Pre-biased startup

External output voltage < Vset

Monotonic

GENERAL and SAFETY

Efficiency

Vin=48V, full load

93.5

94.5

%

Vin=45.6V, full load

93.5

94.5

%

Isolation

Isolation Voltage, input to output

No baseplate

2250

Vdc

Isolation Voltage, input to output

With baseplate

2250

Vdc

Isolation Voltage, input to baseplate

With baseplate

1500

Vdc

Isolation Voltage, output to baseplate

With baseplate

1500

Vdc

Insulation Safety Rating

basic

Isolation Resistance

10

MΩ

Isolation Capacitance

1000

pF

Safety

Certified to UL-60950-1, CSA-C22.2 No.60950-1,

IEC/EN60950-1, 2nd edition

Yes

Calculated MTBF

Per MIL-HDBK-217F, ground benign,

Tambient=+TBD°C

TBD

Calculated MTBF

Per Telcordia SR-332, issue 1, class 3, ground

fixed, Tambient=+25°C

1500

DYNAMIC CHARACTERISTICS

Fixed Switching Frequency

260

KHz

Startup Time

Power On, to Vout regulation band,

100% resistive load

15

mS

Startup Time

Remote ON to Vout Regulated

15

mS

Dynamic Load Response

50-75-50% load step to 1% error band

550

825

μSec

Dynamic Load di/dt

0.1

A / μSec

Dynamic Load Peak Deviation

same as above

±500

±750

mV

FEATURES and OPTIONS

Remote On/Off Control

➃

“N” suffix:

Negative Logic, ON state

ON = pin grounded or external voltage

0

0.8

Vdc

Negative Logic, OFF state

OFF = pin open or external voltage

3.5

13.5

Vdc

Control Current

open collector/drain

1

2

mA

FEATURES and OPTIONS (cont.)

Conditions

➀

Minimum

Typical/Nominal

Maximum

Units