RECOMMENDED OPERATING CONDITIONS

TYPICAL CHARACTERISTICS

INHIBIT

ABSOLUTE MAXIMUM RATINGS

Input Voltage

• 16 to 40 V

Output Power

• 5 watts

Lead Soldering Temperature (10 sec per lead)

• 300°C

Storage Temperature Range (Case)

• –65°C to +135°C

46

SMSA SERIES

5 WATT

Output Voltage Temperature Coefficient

• 100 ppm/°C typical

Input to Output Capacitance

• 50 pF typical

Isolation

• 100 megohm minimum at 500 V

Audio Rejection

• 50 dB typical

Conversion Frequency

• 550 kHz typical

450 kHz min, 600 kHz max

Inhibit Pin Voltage (unit enabled)

• 9 to 11 V

Input Voltage Range

• 16 to 40 VDC continuous

• 50 V for up to 50 msec transient

Case Operating Temperature (Tc)

• –55°C to +125°C full power

• –55°C to +135°C absolute

Derating Output Power/Current (Tc)

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

®

Electrical Characteristics: 25°C Tc, 28 VDC Vin, 100% load, radiation level O, unless otherwise specified.

Inhibit TTL Open Collector

• Logic low (output disabled)

Logic low voltage

≤0.8 V max

Inhibit pin current 4 mA max

• Referenced to input common

• Logic high (output enabled)

Open collector

Notes

1. Indefinite short circuit protection not guaranteed above 125°C (case).

2. Recovery time is measured from application of the transient to point at which

3. Guaranteed but not tested.

SINGLE OUTPUT MODELS

SMSA283R3S

SMSA2805S

SMSA2812S

SMSA2815S

PARAMETER

CONDITIONS

MIN

TYP MAX

MIN

TYP MAX

MIN

TYP MAX

MIN

TYP MAX

UNITS

OUTPUT VOLTAGE

Tc = –55°C TO +125°C

3.25

3.30

3.35

4.95

5.00

5.05

11.88 12.00 12.12

14.85 15.00 15.15

VDC

OUTPUT CURRENT

Tc = –55°C TO +125°C

0

—

1200

0

—

1000

0

—

417

0

—

333

mA

OUTPUT POWER

Tc = –55°C TO +125°C

—

—

4

—

—

5

—

—

5

—

—

5

W

OUTPUT RIPPLE

VOLTAGE

10 kHz - 2 MHz

—

300

600

—

150

450

—

125

500

—

150

600

mV p-p

LINE REGULATION

Tc = –55°C TO +125°C

—

10

50

—

10

50

—

10

50

—

10

50

mV

LOAD REGULATION

NO LOAD TO FULL

Tc = –55°C TO +125°C

—

10

50

—

10

50

—

10

50

—

10

50

mV

INPUT VOLTAGE

Tc = –55°C TO +125°C

NO LOAD TO FULL

CONTINUOUS

16

28

40

16

28

40

16

28

40

16

28

40

VDC

0

—

50

0

—

50

0

—

50

0

—

50

V

INPUT CURRENT

NO LOAD

—

35

60

—

35

60

—

35

60

—

35

60

FULL LOAD

—

250

—

—

250

—

—

235

—

—

235

—

mA

INHIBITED

—

3

5

—

3

5

—

3

5

—

3

5

INPUT RIPPLE

10 kHz - 10 MHz

—

50

200

—

50

200

—

50

200

—

50

200

mA p-p

CURRENT

Tc = –55°C TO +125°C

—

60

300

—

60

300

—

60

300

—

60

300

EFFICIENCY

60

—

—

68

74

—

69

74

—

%

POWER DISSIPATION

—

1.5

2.4

—

1.5

2.0

—

1.2

1.9

—

1.2

1.8

W

SHORT CIRCUIT

RECOVERY

—

12.5

25

—

12.5

25

—

1

10

—

1

10

ms

STEP LOAD

50% - 100% - 50%

RESPONSE

TRANSIENT

—

200

500

—

200

500

—

300

750

—

400

1000

mV pk

—

200

500

—

200

500

—

400

1000

—

400

1000

µs

STEP LINE

TRANSIENT

—

200

500

—

200

500

—

200

800

—

200

500

mV pk

—

200

500

—

200

500

—

250

600

—

200

500

RECOVERY

—

400

1000

—

400

1000

—

700

1300

—

500

1300

µs

—

400

1000

—

400

1000

—

700

1300

—

500

1300

START-UP

DELAY

—

10

75

—

10

75

—

10

75

—

10

75

ms

—

0

200

—

0

200

—

0

500

—

0

500

mV pk