ECRI Microelectronics

HSFM140 Series Transient Protection DC DC Converters

1 Features of HSFM140  Series Transient Suppression DC/ DC Converters


High reliability            
Maximum input transient voltage:80V/50ms or 8V/50ms
Output power PO:140W
Operating temperature range :Tc:-55℃~+125℃
Efficiency:95% 
Match with DC/DC converter with
 Input voltage range of 16-40V 
Hermetically sealed metal cases

2. Scope of application of HSFM140  Series Transient Protection DC DC Converters

High-reliability electronic system for aviation and aerospace, etc.

3. Description of HSFM140  Series Transient Protection DC DC Converters

HSFM-140 surge protection front-end module is matched with DC DC converter.
It is used to treat the Instantaneous input voltage (80V/50ms,8V/50ms),after processing , it provides a reliable input voltage for DC DC converter. The module is made of thick-film hybrid integrated process, bare chip assembly and full metal case sealed package.
Two operating modes for HSFM-140 surge protection front-end module:
Normal operating mode:When the bus voltage at 16V~40V,the module output voltage follows the input voltage and lower than the input voltage of about △V, while the internal DC DC converter charge the external capacitor.
Surge maintenance mode::When the bus voltage reaches 80V/50ms or 8V/50ms,
The output part of the modules will be switched back .The external capacitor discharged tosupply power for the DC DC till the surge ends.

4. Electrical performance of HSFM140  Series Transient Protection DC DC Converters

Tabel2 Rated conditions and recommended operating conditions

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


Table 3 Electric characteristics

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

-


5. Circuit block diagram of HSFM140  Series Transient Protection DC DC Converters

Hybrid HSFM-140 Series surge protection Front –end module
Figure 1 HSFM-140 circuit block diagram

The values of external capacitor Cext can refer to the following formula:
Hybrid HSFM-140 Series surge protection Front –end module
Note: F is Cext unit.
P is output power,unit is W
T is the time of discharge,unit is s
v(t1)is the voltage when external capacitor is charged to full,unit is V
v(t2)is the voltage when external capacitor is discharged to empty,unit is V

6. Typical Performance Curves of HSFM140  Series Transient Protection DC DC Converters


Hybrid HSFM-140 Series surge protection Front –end module
Figure 2 HSFM-140input&output typical curves

Hybrid HSFM-140 Series surge protection Front –end module
Figure 3 Input surge(80V,50ms)output voltage curves
Hybrid HSFM-140 Series surge protection Front –end module
Figure 4 Input surge(8V,50ms)output voltage curves

7. MTBF Curves of HSFM140  Series Transient Protection DC DC Converters

Hybrid HSFM-140 Series surge protection Front –end module
Figure 5 MTBF temperature curves(HSFM-140)

8. Pin Designation of HSFM140  Series Transient Protection DC DC Converters


Hybrid HSFM-140 Series surge protection Front –end module
Figure 6 Pin Out Bottom View

Table 4 Pin Designation

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


9. Typical Connection Diagram of HSFM140  Series Transient Protection DC DC Converters


Hybrid HSFM-140 Series surge protection Front –end module
Figure 7 Typical connection diagram

10.Package Specifications (Unit:mm) of HSFM140  Series Transient Protection DC DC Converters

①Non-flanged
Hybrid HSFM-140 Series surge protection Front –end module
Hybrid HSFM-140 Series surge protection Front –end module

Figure 8 Bottom View

Figure 9 Side View


② With flanged
Hybrid HSFM-140 Series surge protection Front –end module
Hybrid HSFM-140 Series surge protection Front –end module

Figure 10  Bottom View

Figure 11 Side View


Table 5  Package Outline

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

-


Table 6  Case Materials

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


11. Ordering Information of HSFM140  Series Transient Protection DC DC Converters



Hybrid HSFM-140 Series surge protection Front –end module
Figure 12 ordering information

Application Notes:

  • Both positive and negative terminals for power supply shall be correctly connected when power is applied so as to avoid permanent damage to the device.
  • Testing position shall be the root of the pin of the device when the electrical characteristic is measured.
  • The baseplate of the device shall be closely attached to the circuit board during device mounting so as to avoid the damage on pins. The shockproof actions shall be adopted when necessary.
  • Pins shall not be bended to avoid the glass insulator cracking and case leaking.
  • When ordering this device,the detail electrical specification shall be based on relevant standards. While data offered in this document shall be for reference only.




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