MFL Single and Dual DC/DC Converters

Crane Aerospace & Electronics Power Solutions

Page 2 of 13

Rev D - 20060601

www.craneae.com

28 VOLT INPUT – 65 WATT

OPERATING CONDITIONS AND CHARACTERISTICS

Input Voltage Range

• 16 to 40 VDC continuous

• 50 V for 120 msec transient

Output Power

• 50 to 65 watts depending on model

Lead Soldering Temperature (10 sec per lead)

• 300°C

Storage Temperature Range (Case)

• –65°C to +150°C

Power Dissipation (Pd)

• 14 watts (16 watts MFL2805S, MFL2805D)

Case Operating Temperature (Tc)

• –55°C to +125°C full power

• –55°C to +135°C absolute

Derate Output Power/Current

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

• MFL283R3S: linearly from 100% at 100°C to

80% at 125°C and to 0% at 135°C

Output Voltage Temperature Coefficient

• 100 ppm/°C typical

Input to Output Capacitance

• 150 pF, typical

Current Limit

• 125% of full load typical

Isolation

• 100 megohm minimum at 500 V

Audio Rejection

• 50 dB typical

Conversion Frequency (-55°C to 125°C)

• Free run mode 600 kHz typical

525 kHz. min, 675 kHz max

Inhibit Pin Voltage (unit enabled)

• INH1 = 9 to12 V, INH2 = 6 to 9 V

MECHANICAL AND ENVIRONMENTAL

Size (maximum)

3.005 x 1.505 x 0.400 inches (76.33 x 38.23 x 10.16 mm)

See case U for dimensions.

Case options V, W, Y and Z are available by special order.

Weight (maximum)

86 grams

Screening

Standard, ES, or /883 (Class H, QML). See “883, Class H, QML Products – Element Evaluation” and “883, Class H, QML Products – Environmental

Screening” for more information.

SYNC AND INHIBIT (INH1, INH2)

Sync In (525 to 675 kHz)

• Duty cycle 40% min, 60% max

• Logic low 0.8 V max

• Logic high 4.5 V min, 5 V max

• Referenced to input common

Sync Out

• Referenced to input common

Inhibit (INH1, INH2) TTL Open Collector

• Logic low (output disabled)

INH1 referenced to input common

Logic low 0.8 V max

Inhibit pin current 10 mA max

INH2 referenced to output common

Logic low 0.5 V max

Inhibit pin current 5 mA max

• Logic high (output enabled)

Open collector