RECOMMENDED OPERATING CONDITIONS

ABSOLUTE MAXIMUM RATINGS

INHIBIT

Power Dissipation (Pd)

•5 W

Output Power

• 15 watts

Lead Soldering Temperature (10 sec per lead)

• 300°C

Storage Temperature Range (Case)

• –65°C to +125°C

B4-20

MRH SERIES

15 WATT

TYPICAL CHARACTERISTICS

Input Voltage Range

• Continuous

16 to 40 VDC MRH28XXS and MRH2812D

19 to 40 VDC MRH2815D

16 to 36 VDC MRH285XXT

• 50 V for 50 msec transient

Case Operating Temperature (Tc)

• –55°C to +85°C full power

• –55°C to +125°C absolute

Inhibit TTL Open Collector

• Logic low (output disabled)

Inhibit pin current

≤ –2 mA

• Referenced to input common

• Logic high (output enabled)

Open collector

Electrical Characteristics: 25°C Tc, 28 VDC Vin, 100% load, unless otherwise specified.

SINGLE OUTPUT MODELS

MRH2805S

MRH2812S

MRH2815S

PARAMETER

CONDITIONS

MIN

TYP

MAX

MIN

TYP

MAX

MIN

TYP

MAX

UNITS

OUTPUT VOLTAGE

4.95

5.0

5.05

11.88

12

12.12

14.85

15

15.15

VDC

OUTPUT CURRENT

–55°C TO +85°C

0.05

—

3.0

0.02

—

1.25

0.016

—

1.0

A

OUTPUT POWER

0.25

—

15

0.25

—

15

0.25

—

15

W

OUTPUT RIPPLE

10 kHz TO 2 MHz

—

40

70

—

25

50

—

25

50

mV p-p

LINE REGULATION

—

5

10

—

5

20

—

5

20

mV

MIN. LOAD TO FULL

—

5

30

—

5

30

—

5

30

mV

NO LOAD TO FULL

16

28

40

16

28

40

19

28

40

VDC

TRANSIENT 50 ms

—

—

50

—

—

50

—

—

50

V

INPUT CURRENT

NO LOAD

—

50

60

—

50

60

—

50

60

FULL LOAD

—

—

750

—

—

730

—

—

720

mA

INHIBITED

—

22

25

—

22

25

—

22

25

INPUT RIPPLE

CURRENT

10 kHz TO10 MHz

—

25

50

—

25

50

—

25

50

mA p-p

EFFICIENCY

73

75

—

76

78

—

78

80

—

%

SHORT CIRCUIT

—

5

—

—

5

—

—

5

—

W

POWER DISSIPATION

OVERLOAD

—

5

—

—

5

—

—

5

—

START-UP

DELAY

—

3

10

—

3

10

—

3

10

ms

Notes

1. Load regulation is not guaranteed below minimum load.

rads (Si) total dose.

3. Indefinite short circuit protection is not guaranteed above 85°C case.

Output Voltage Temperature Coefficient

• 250 ppm/°C max

Input to Output Capacitance

• 100 p, typical

Current Limit

• 125% of full load typical

Isolation

• 100 megohm minimum at 500 V

Conversion Frequency

• 375 kHz. typical

Inhibit Pin Voltage (unit enabled)

• 5 to 6 V

Radiation (will operate through)

DERATING OUTPUT POWER/CURRENT AND INPUT VOLTAGE

Temperatures are referenced to the temperature at the converter’s baseplate

• Linearly derate output power/current from 100% at 85°C to 0% at 125°C.

• Above 105°C linearly derate steady state input voltage to 33 V and

transient voltage to 38 V, at 125°C.

• Operation below an input voltage of 19 volts, including operation in MIL-

STD-704E emergency power conditions, is possible with derated

output power. See Figures 9 and 10.