MHF2812DFSLASH883 datasheet(14/21 Pages) INTERPOINT

14 / 21 page

RECOMMENDED OPERATING CONDITIONS

TYPICAL CHARACTERISTICS

ABSOLUTE MAXIMUM RATINGS

Input Voltage

• 16 to 48 VDC

Power Dissipation (Pd)

• 12 watts

Output Power

• 15 watts

Lead Soldering Temperature (10 sec per pin)

• 300°C

Storage Temperature Range (Case)

• –65°C to +150°C

MHF+ SERIES TRIPLE

15 WATT

DC/DC CONVERTERS

Output Voltage Temperature Coefficient

• 150 ppm/°C typical

Current Limit

• 130% typical

Isolation

• 100 megohm minimum at 500 V

Conversion Frequency

• Free run 375 minimum, 500 kHz maximum

• External sync range 400 to 600 kHz

Inhibit Pin Voltage (unit enabled)

• 10 V typical

Input Voltage Range

• 16 to 48 VDC continuous

• 80 V for up to 120 msec

Case Operating Temperature (Tc)

• –55°C to +125°C full power

• –55°C to +135°C absolute

Derating Output Power/Current

• Linearly from 100% at 125°C to 0% at 135°C

SYNC AND INHIBIT

Sync 400 to 600 kHz

• Duty cycle 40% to 60%

• Logic low 0.8 V max

• Logic high 4.5 V min, 10.0 V max

• If not used, leave unconnected

• Referenced to input common

Inhibit: TTL Open Collector

• Logic low (output disabled)

Logic low voltage

≤0.8 V max

Inhibit pin current 3.0 typ, 5.0 max

• Referenced to input common

Logic high (output enabled)

Open collector

Unconnected or 11 to 40 V

PWM CM

CONTROLLER

180

PWM CM

CONTROLLER

INPUT

COMMON

FEEDBACK ISOLATOR

OUTPUT

COMMON

+ AUX.

OUTPUT

–AUX.

OUTPUT

POSITIVE

INPUT

SYNC

+5 OUTPUT

FIGURE 1: BLOCK DIAGRAM

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