Absolute Max. Rating

Input voltage:15V～50V

Input voltage(Transient,1s):80V

Output Power: 22W

Storage temperature:-65℃～150℃

Mechanical Shock:1500g

Lead resistance welding temperature:300℃（15s）

Weight(withoutflange/ with flange): 31g/34g

Antistatic intensity:2000V

No.

Items

Conditions （Testing condition as perTc=25℃,VIN=28V±5%, unless otherwise specified)

HSDF28D5

HSDF28D5F

HSDF28D12

HSDF28D12F

HSDF28D12

HSDF28D12F

Min

Max

Min

Max

Min

Max

1

Input Voltage/V

Low、High、Ambient Temperature

15

50

15

50

15

50

2

Output Voltage/V

Positive

Ambient

4.95

5.05

11.88

12.12

14.85

15.15

Negative

4.80

5.20

11.80

12.20

14.80

15.20

Positive

Low/high

4.925

5.075

11.82

12.18

14.80

15.20

Negative

4.75

5.25

11.52

12.48

14.40

15.60

3

Output current/A

VIN=15V～50V

―

1.5

―

0.833

―

0.666

4

Output Power/W

0

15

0

20

0

20

5

Output Ripple Voltage/mV

BW≤6MHz,Io=Full

load

―

60

―

50

―

60

6

Line Regulation/mV

Positive

VIN=16V～40V,Io=Full

―

50

―

50

―

50

Negative

―

50

―

50

―

50

7

LoadRegulation/mV

Positive

No load to full

―

50

―

50

―

50

Negative

―

50

―

50

―

50

8

Input current/mA

Inhibited

―

6

―

6

―

6

Io=no load

―

60

―

60

―

60

9

Input Ripple current/mA

BW≤20MHz,Io=Full

load

―

60

―

60

―

60

10

Efficiency/%

Io=Full

load

73

―

78

―

79

―

11

Isolation/MΩ

Input to output or any pin to case(except pin 7、8)at 500V,Tc=25℃

100

―

100

―

100

―

12

Inhibit Function

0

0.7

0

0.7

0

0.7

13

Under-voltage open voltage/V

Io=Full

Load

12.0

14.8

12.0

14.8

12

14.8

14

Under-voltagecut-off voltage/V

Io=Full

Load

11.0

14.5

11.0

14.5

11

14.5

15

Short Circuit Protection

16

Capacitive load

/μF

Tc=25℃

―

500

―

500

―

500

17

Switching frequency/kHz

Io=Full

Load

350

500

350

500

350

500

18

Cross Regulation

One is 30% load, another one is from 30% to 70% load

―

500

―

500

―

500

19

Step Load Response Transient(mV pK)

50%load→full load

→50%load

―

400

―

400

―

400

20

Step Load Response Recovery(μs)

50%load→full load

→50%load

―

500

―

500

―

500

21

Step Line Response Transient(mV pK)

VIN：16V→40V，

VIN：40V→16V，Io=Full load

―

800

―

900

―

900

22

Step Line Response Recovery(μs)

VIN：16V→40V

VIN：40V→16V

Io=Full load

―

700

―

500

―

500

23

Start-up Overshoot(mV pK)

VIN：0→28V，

Io=Full load

―

25

―

50

―

50

24

Start-up Delay (ms)

VIN：0→28V，

Io=Full load

―

20

―

20

―

20

Pin

Symbol

Designation

1

INH

Inhibit

2

VO+

Positive Output

3

GNDO

Output Common

4

VO-

Negative Output

5

NC

No connection

6

GNDC

Case Ground

7

GNDI

Input Common

8

VIN

Positive Input

Symbol

Unit/mm

Min

Typical

Max

A

-

8.4

8.90

A1

1.20

1.50

1.80

φb

0.63

0.76

0.89

D

-

28.44

28.94

E

-

36.83

37.33

e

-

20.32

-

e1

-

5.21

-

e2

-

12.83

-

e3

-

17.91

-

e4

22.99

e5

-

28.07

-

X

50.80

51.30

X1

43.45

43.95

44.45

P

3.00

3.30

3.60

L

5.35

6.35

-

Case Model

Header

Header Plating

Cover

Cover Plating

Pin

Pin Plating

Seal

Notes

UPP3728-08t

（without flange）

Cold Rolled Steel（10#）

Ni

Kovar

(4J42)

Ni

Cu-coreCompound

Ni/Au

Parallel seam

Ni Plating is for case ground pin

UPP3728-08j

（with flange）

Cold Rolled Steel（10#）

Ni

Kovar

(4J42)

Ni

Cu–core Compound

Ni/Au

Parallel seam

Ni Plating is for case ground pin