RECOMMENDED OPERATING CONDITIONS

ABSOLUTE MAXIMUM RATINGS

TYPICAL CHARACTERISTICS

B4-4

MFW SERIES

70 WATT

SINGLE OUTPUTS

MFW2805S

MFW2812S

MFW2815S

PARAMETER

CONDITION

MIN

TYP

MAX

MIN

TYP MAX

MIN.

TYP

MAX

UNITS

OUTPUT

FULL LOAD

4.95

5.00

5.05

11.88 12.00 12.12

14.85 15.00 15.15

VDC

VOLTAGE

OUTPUT

—

—

12.00

—

—

5.83

—

—

4.67

A

CURRENT

OUTPUT

Tc = –55°C TO +85°C

—

—

60

—

—

70

—

—

70

W

POWER

OUTPUT

FULL LOAD BW

≤2 MHz

—

30

50

—

30

50

—

30

50

mV p-p

RIPPLE

LINE

—

10

20

—

10

20

—

10

20

mV

REGULATION

LOAD

NO LOAD TO FULL

—

10

20

—

10

25

—

10

25

mV

REGULATION

INPUT

VOLTAGE

19

28

40

19

28

40

19

28

40

VDC

INPUT

NO LOAD

—

75

90

—

70

90

—

70

90

mA

CURRENT

INHIBITED

—

30

35

—

30

35

—

30

35

INPUT REFL.

FULL LOAD

—

10

25

—

10

25

—

10

25

mA p-p

RIPPLE

BW

≤10 MHz

EFFICIENCY

78

80

—

81

83

—

81

83

—

%

STARTUP

WITH LOW

—

5

10

—

8

10

—

8

10

ms

DELAY

IMPEDANCE SOURCE

Output Power

• 60 to 70 watts depending on model

Lead Soldering Temperature (10 sec per lead)

• 300°C

Storage Temperature Range (Case)

• –55°C to +125°C

Output Voltage Temperature Coefficient

• 150 ppm/°C, typical

Input to Output Capacitance

• 160 pF, typical

Isolation

• 100 megohm minimum at 500 V

Conversion Frequency

• Free run mode 245 kHz, typical

Inhibit Pin Voltage (unit enabled)

• 4.5 to 5.5 V

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

Input Voltage Range

• 19 to 40 VDC continuous (see Derating)

Case Operating Temperature (Tc)

• –55°C to +85°C full power

SYNC AND INHIBIT

DERATING OUTPUT POWER/CURRENT AND INPUT VOLTAGE

Sync In (245 to 370 kHz.)

• Duty cycle 70% min, 98% max

• Logic low 0.8 V max

• Logic high 4.5 V min

• Referenced to input common

• If sync is not used, leave unconnected

Inhibit TTL Open Collector

• Logic low (output disabled)

Inhibit pin current 1 mA max

• Referenced to input common

• Logic high (output enabled)

V =

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 volts at 125°C.

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

• 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 10 and 11.