5 Electrical Parameters

This section shows the electrical parameters of the SA50-28 Triple Series device under the following conditions unless otherwise specified:

Parameter

Output

Conditions

Min

Nom

Max

Units

Input voltage all configurations

(Vin)

—

Note 2

20

28

40

V

Output Voltages by configuration (Vout)

SA50-28-3R3-12T-x-x

IOUT = 100% rated load

V

(MAIN)

3.3V

3.27

3.30

3.33

(AUX A/B)

12V

11.59

12.00

12.41

SA50-28-3R3-15T-x-x

(MAIN)

3.3V

3.27

3.30

3.33

(AUX A/B)

15V

14.25

14.75

15.25

SA50-28-5-12T-x-x

(MAIN)

5V

5.08

5.10

5.12

(AUX A/B)

12V

11.75

12.00

12.24

SA50-28-5-15T-x-x

(MAIN)

5V

5.08

5.10

5.12

(AUX A/B)

15V

14.25

14.75

15.25

Output Power by configuration (Pout)

SA50-28-3R3-12T-x-x

Note 3

4.32

—

43

W

SA50-28-3R3-15T-x-x

4.32

—

43

SA50-28-5-12T-x-x

5.0

—

50

SA50-28-5-15T-x-x

5.0

—

50

Output current by configuration (Iout)

SA50-28-3R3-12T-x-x

In all cases, output power must be kept within Pout rating.

Note 13, 14, 15, 16

mA

(MAIN)

3.3V

400

—

4000

(AUX A/B)

12V

125

—

1250

SA50-28-3R3-15T-x-x

(MAIN)

3.3V

400

—

4000

(AUX A/B)

15V

100

—

1000

SA50-28-5-12T-x-x

(MAIN)

5V

400

—

4000

(AUX A/B)

12V

125

—

1250

SA50-28-5-15T-x-x

(MAIN)

5V

400

—

4000

(AUX A/B)

15V

100

—

1000

Line regulation by configuration (VRLINE)

SA50-28-3R3-12T-x-x

VIN = 20V, 28V, 40V IOUT = 10%, 50%, 100% rated Note 12

mV

(MAIN)

3.3V

-10

—

10

(AUX A/B)

12V

-120

—

120

SA50-28-3R3-15T-x-x

(MAIN)

3.3V

-10

—

10

(AUX A/B)

15V

-150

—

150

SA50-28-5-12T-x-x

(MAIN)

5V

-10

—

10

(AUX A/B)

12V

-120

—

120

SA50-28-5-15T-x-x

(MAIN)

5V

-10

—

10

(AUX A/B)

15V

-150

—

150

Load regulation by configuration (VRLOAD)

SA50-28-3R3-12T-x-x

VIN = 20V, 28V, 40V IOUT = 10%, 50%, 100% rated Note 11

mV

(MAIN)

3.3V

-50

—

50

(AUX A/B)

12V

-400

—

400

SA50-28-3R3-15T-x-x

(MAIN)

3.3V

-50

—

50

(AUX A/B)

15V

-500

—

500

SA50-28-5-12T-x-x

(MAIN)

5V

-50

—

50

(AUX A/B)

12V

-400

—

400

SA50-28-5-15T-x-x

(MAIN)

5V

-50

—

50

(AUX A/B)

15V

-500

—

500

Cross regulation (VRcross)

(Aux)

—

VIN = 20V, 28V, 40V IOUT = 2.5A to 1A and 2.5A to 4A on main, and ±half the rated current on the Aux outputs

-3.0

—

3.0

%

Input current all configurations (IIN)

(Iin)

—

IOUT=0, pin3 open

—

100

150

mA

Pin 3 short to pin 2

2

5

Output ripple all configurations (VRIP)

(Main)

—

VIN = 20V, 28V, 40V IOUT = 100% rated, Note 4

—

25

50

mVpp

(Aux)

——

37.5

75

Switching frequency all configurations (FS)

(FS)

—

Sync input (pin 4) open

200

220

240

kHz

Efficiency by configuration (eff)

SA50-28-3R3-12T-x-x

IOUT = 100% rated load

75

84

—

%

SA50-28-3R3-15T-x-x

75

84

—

SA50-28-5-12T-x-x

80

84

—

SA50-28-5-15T-x-x

80

84

—

Inhibit input all configurations

Inhibit input: ON Threshold

Note 1

4.5

——

V

Inhibit input: OFF (sink)

1000

——

µA

Inhibit input: OFF threshold

——

2

V

Current limit all configurations

Current limit point (% rated output)

When VOUT = 90% of nominal set point

105

—

145

%

Synchronization all configurations

Synchronization frequency range

The external clock on sync input (pin 4)

Note 1

500

—

600

kHz

Synchronization pulse-high level

4.0

—

10.0

V

Synchronization pulse-low level

–0.5

—

0.5

V

Synchronization pulse-transition rate

200

——

V/µs

Synchronization pulse-duty cycle

10

—

80

%

Power dissipation all conditions, load fault

(PD)

—

Short circuit, overload,

Note 6

——

22

W

Output response to step load changes all configurations

(VTLD)

—

(50% to/from 100%)

rated load

Note 7

-300

—

300

mVpk

Recovery time, step load changes all configurations

(TTLD)

—

(50% to/from 100%)

rated load

Notes 7, 8

—

200

2000

µs

Output response to step line changes all configurations

(VTLN)

—

20V to / from 40V IOUT = 100% rated load Note 9

–300

—

300

mVpk

Recovery time, step line changes all configurations

(TTLN)

—

20V to/from 40V IOUT = 100% rated load Notes 8, 9

—

50

2000

µs

Turn-on response: overshoot by configuration (VOS) (main)

SA50-28-3R3-12T-x-x

(0% to 100%) rated load Notes 3, 4, 10

mV

(MAIN)

3.3V

——

500

(AUX A/B)

12V

——

750

SA50-28-3R3-15T-x-x

(MAIN)

3.3V

——

500

(AUX A/B)

15V

——

750

SA50-28-5-12T-x-x

(MAIN)

5V

——

500

(AUX A/B)

12V

——

750

SA50-28-5-15T-x-x

(MAIN)

5V

——

500

(AUX A/B)

15V

——

750

Turn-on response: turn-on delay all configurations

(TDLY)

—

Note 10

0.1

—

10

ms

Capacitive load by configuration (CLOAD)

SA50-28-3R3-12T-x-x

Note 5

µF

(MAIN)

3.3V

——

1000

(AUX A/B)

12V

——

250

SA50-28-3R3-15T-x-x

(MAIN)

3.3V

——

1000

(AUX A/B)

15V

——

200

SA50-28-5-12T-x-x

(MAIN)

5V

——

1000

(AUX A/B)

12V

——

250

SA50-28-5-15T-x-x

(MAIN)

5V

——

1000

(AUX A/B)

15V

——

200

Line rejection

——

DC to 50 kHz, IOUT = 100% rated load

40

60

—

dB

Isolation

——

50V @25°C

  1. Input (1-3) to All (4-12)
  2. Sync (4-5) to All (1-3, 6-12)
  3. Chassis (6) to All (1-5, 7-12)

100

——

MΩ

Mass

——

Standard case style A, B

—120

g

MTBF

——

MIL-HDBK-217F2, SF, 35°C

—

8.22x106

—

hrs