OPERATING CONDITIONS AND CHARACTERISTICS

Input Voltage Range

• 19 to 56 VDC continuous

Output Power

• up to 35 watts depending on model

Lead Soldering Temperature (10 sec per pin)

• 300°C

Storage Temperature Range (Case)

• -65°C to +150°C

Case Operating Temperature (Tc)

• -55°C to +125°C full power

• -55°C to +135°C absolute

Power Dissipation (Pd)

• 20 to 28 W

Output Voltage Temperature Coefficient

• 100 ppm/°C max

Current Limit

• 125% of full load typical

Isolation

• 100 megohm minimum at 500 V

Audio Rejection

• 50 dB typical

Conversion Frequency

• 300 kHz typical, 270 kHz min., 330 kHz max.

Radiation (will operate through)

• Total dose up to 300 K rads (Si)

Cross Regulation

• 2.5% typical

MECHANICAL AND ENVIRONMENTAL

Size (maximum)

2.705 x 2.205 x 0.400 inches (68.71 x 56.01 x 10.16 mm)

See case S for dimensions.

Weight (maximum)

100 grams maximum

Screening

Space Prototype, Class H, or Class K

Radiation tolerant to Radiation Hardness Assurance (RHA) levels of “-” (O), “P”, “R”, or “F” per MIL-PRF-38534. Interpoint model

numbers use an “O” in the RHA designator position to indicate the “-” (dash) Radiation Hardness Assurance level of MIL-PRF-

38534, which is defined as “no RHA”.

See “Class H and K, MIL-PRF-38534 Screening” tables for more information.

Available configurations: OO, HP, HR, KP, KR, KF

SYNC AND INHIBIT

Sync In 270-330 kHz typical

• Duty cycle 20% min, 80% max

• 2.5V p-p minimum amplitude

• 10V p-p maximum amplitude

• Can be referenced to input or output return

• If sync is used at lower end of the range, full load

operation is not guaranteed.

Inhibit

• Actve low (output disabled)

INH referenced to input common

Active low 0.4 V max

Inhibit pin current < 2mA

• Open collector (output enabled)

High >3.0V

Not to exceed 10V

Open Collector

Inhibit Pin Voltage

• 5 to 6 V

Crane Aerospace & Electronics Power Solutions

www.craneae.com

Page 3 of 17

Rev B – 20080213

SMRT Single, Dual and Triple DC/DC Converters

28 VOLT INPUT – 35 WATT