PIN OUT

Pin

Single Output

Dual Output

1

Inhibit

Inhibit

2

No connection

Positive Output

3

Output Common

Output Common

4

Positive Output

Negative Output

5

No connection

No connection

6

Case Ground

Case Ground

7

Input Common

Input Common

8

Positive Input

Positive Input

BOTTOM VIEW

MHF

Squared corner and dot on

top of cover indicate pin one.

1

2345

87

6

B2-79

MHF SERIES

12 WATT

DUAL OUTPUT MODELS

MHF2812D

MHF2815D

PARAMETER

CONDITION

MIN

TYP

MAX

MIN

TYP

MAX

UNITS

OUTPUT VOLTAGE

11.88

12.0

12.12

14.85

15.0

15.15

VDC

11.82

12.0

12.18

14.77

15.0

15.23

—

0.5

1.0

—

0.4

0.8

A

—

—

10.8

—

—

10.8

—

—

10.8

—

—

10.8

W

TOTAL

—

—

12

—

—

12

OUTPUT RIPPLE

VOLTAGE

10 kHz TO 2 MHz

—

30

60

—

30

60

mV p-p

LINE REGULATION

—

5

50

—

5

50

mV

LOAD REGULATION

NO LOAD TO FULL

—

5

50

—

10

50

mV

CROSS REGULATION

—

5

10

—

4

8

%

—4

5

—

3

5

INPUT VOLTAGE

CONTINUOUS

16

28

40

19

28

40

VDC

NO LOAD TO FULL

TRANSIENT 50 ms

—

—

50

—

—

50

V

INPUT CURRENT

NO LOAD

—

25

35

—

25

35

FULL LOAD

—

—

550

—

—

536

mA

INHIBITED

—

1.9

3

—

1.9

3

INPUT RIPPLE

CURRENT

10 kHz TO 2 MHz

—

175

240

—

175

240

mA p-p

EFFICIENCY

78

81

—

80

83

—

%

POWER DISSIPATION

SHORT CIRCUIT

—

—

2.8

—

—

2

W

OVERLOAD

—

—

5

—

—

5

START-UP

DELAY

—

150

250

—

150

250

ms

Notes

1. Applies to both outputs.

2. Maximum combined output power is 12 watts. A maximum of 90% is avail-

able from either output.

3. 20% to 80% load on the positive output and 80% to 20% on the negative

output. See Figure 8.

4. 50% load on the positive output and 50% to 20% load on the negative output.

50% load on the negative output and 50% to 20% load on the positive output.

See Figure 7.

5. Indefinite short circuit protection not guaranteed above 125°C case temper-

ature.

MODEL NUMBER KEY

MHF

28 12

D / ES

Base Model

Input Voltage

Output Voltage

Number of Outputs

(S = single, D = dual)

Screening

(Standard screening has no designator

in this position.)

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

See Section B8, case E1, for dimensions.