MOR283R3S datasheet(2/21 Pages) CRANE

2 / 21 page

MOR Single and Dual DC/DC Converters

Crane Aerospace & Electronics Power Solutions

Page 2 of 21

Rev G - 20060418

www.craneae.com

28 VOLT INPUT – 120 WATT

Positive

Input

Common

Output

Common

Positive

Output

100

Positive

Sense

Return

Secondary VCC

VS+

Function

VRef

Trim

Secondary VCC

Inhibit 2

PWM

Controller

Sync

In / Out

VIn

UVLO

Sync In

Sync Out

FET

Driver

Bias

Supply

Inhibit 1

1.7

μΗ

0.5

μΗ

1.3

μΗ

0.1

μΗ

μF

0.1

μF

0.015

μF

500 V

0.015

μF

500 V

600

μF

600

μF

FIGURE 1: SIMPLIFIED SCHEMATIC – MOR2805S, SINGLE 5 VOLT OUTPUT – TYPICAL VALUES

OPERATING CONDITIONS AND CHARACTERISTICS

Input Voltage Range

• 16 to 40 VDC continuous

• 50 V for 120 msec transient

Output Power

• 66 to 120 W, depending on model

Power Dissipation (Pd)

• 30 W

Lead Soldering Temperature (10 sec per lead)

• 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

Derating Output Power/Current

• Linearly from 100% at 125°C 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

• 40 dB typical

Conversion Frequency

• Free run mode, 25°C, 550 kHz typical

480 kHz. min, 580 kHz max

• External sync range 525 to 625 kHz

Inhibit Pin Voltage (unit enabled)

• INH1 = 13 V typ, INH2 = 8 V typical

Undervoltage Lockout

• 15.5 V input typical

SYNC AND INHIBIT

Sync In (525 to 625 kHz)

• Logic low 0.8 V max, duty cycle 15% to 50%

• Logic high 4.5 V min, 9 V max

• Referenced to input common

Sync Out - Referenced to input common

Inhibit (INH1, INH2) : TTL Open Collector

• Logic low (output disabled), V = 0.2 V max.

• INH1 referenced to input common

• INH2 referenced to output common

• Logic high (output enabled) open collector

MECHANICAL AND ENVIRONMENTAL

Size (maximum)

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

Available in a variety of packages. See cases U, V, W, Y, and Z

for dimensions.

Weight (maximum)

110 grams typical

Screening

Standard, ES, or 883 (Class H, QML). See “883, Class H, QML Products –

Environmental Screeing” for more information.

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