Absolute Max. Rated value

Output Voltage:46V

Input voltage（Transient，50ms）：8V，80V

Output Power：145W

Storage temperature：-65℃～150℃

Mechanical Shock：1500g

Lead resistance welding temperature：300℃（15s）

Weight（Non-flanged/flanged）：31g/34g

Static strength：2000V

No.

Parameter

Conditions

（Unless otherwise specified，-55℃≤Tc≤125℃，VIN=28V±5%）

HSFM-140

Min

Max

1

Input voltage /V

V0=V1-△Va,P0=140W(Pin 8)

20

40

V0=V1-△Va,I0=7A(Pin 7)

18

20

V0=V1-△Va,I0=6.5A(expect 18V)(Pin 8)

16

18

2

Efficiency /%

TA=25℃，I0=5A（Pin 8）

95

-

3

External storage capacitor ended output voltage/V

V1=16V~40V,ICext=50MA(Pin 7),I0=0A(Pin 8)

43

45

4

External storage capacitor ended output current/mA

V1=16V~40V,Io=0A(Pin 8)

-

50

5

External storage capacitor terminal line regulation/V

TA=25℃,V1=16V~40V, ICext=50MA(Pin 7),I0=0A(Pin 8)

-

250

6

External storage capacitor terminal current regulation /mV

TA=25℃,V1=16V~40V, ICext=50MA(Pin 7),I0=0A(Pin 8)

-

250

7

Input transientvoltage

TA=25℃,Low input transient voltage duration time=50ms(Pin7 with 4700μF×Capacitor 3，Pin 8 with 140W constant power load)

8

-

TA=25℃,High input transient voltage duration time=50ms(Pin7 with 4700μF×Capacitor 3，Pin 8 with 140W constant power load)

-

80

8

Isolation

TA=25℃，Any pin(except pin 6)connect 500V DC Voltage with package

100

-

Pin

Symbol

Designation

1

VIN

Positive input

2

Vd

Schottky positive terminal

3

NC

null

4

GND

Input output common

5

NC

null

6

GNDC

Case common

7

Cext

external capacitor terminal

8

VO

Positive output

Dimension Symbols

Unit/mm

Minimum

Nominal

Maximum

A

-

8.4

8.90

A1

1.20

1.50

1.80

φb

0.87

1.00

1.13

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

50.8

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

Sealing Style

Notes

UPP3728-08c

（Non-flanged）

Cold Rolled Steel（10#）

Ni

Kovar

(4J42)

Ni

Copper –coreCompound

Ni/Au

Compression Seal

Nickel Plating is for case ground pin

UPP3728-08d

（Flanged）

Cold Rolled Steel（10#）

Ni

Kovar (4J42)

Ni

Copper –coreCompound

Ni/Au

Compression Seal

Nickel Plating is for case ground pin