ECRI Microelectronics

HSSA28D Series Transient Suppression DC DC Converters

1 Features of HSSA28D Series Transient Suppression DC/ DC Converters

High reliability

        

Wide Range input voltage:15V~50V,Nominal DC input voltage:28V

Maximum input transient voltage:80V,1s 

Output Power PO:6W

Operating temperature range Tc:-55℃~+125℃

Low Startup current 

No output overshoot 

Inhibit function

Inhibit function and indefinite short circuit protection

maximum power density:19W/in3

Hermetically sealed metal cases 


2. Scope of application of HSSA28D Series Transient Suppression DC DC Converters

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

3. Description of HSSA28D Series Transient Suppression DC DC Converters

The HSSA28D series transient suppression DC DC converter is high reliable and featured with transient protection (80v,1s) for DC DC converter. Single ended flyback, pulse width modulated and transformer magnetic feedback topology design are used in the HSSA28D series transient suppression DC DC converter. The operating principle of the HSSA28D series transient suppression DC DC converter is that the sampling signal of output voltage, coupled by the opto-coupler, works together with the sampling signal of input loop current to regulate the pulse width of the controller. The double loop control creates constant voltage output thick film hybrid techniques provides the HSSA28D series transient suppression DC DC converter with high reliability and optimum miniaturization. The design and manufacturing process of the HSSA28D series transient suppression DC DC converter are in compliance with MIL-PRF-38534.

4.Electrical performance of HSSA28D Series Transient Suppression DC DC Converters

Tabel 2  Rated conditions and recommended operating conditions.

Absolute Max. Rated value

Input voltage:15V~50V

Input voltage(Transient,1s):80V

Output Power:6.5W

Storage temperature:-65℃~150℃

Mechanical Shock:1500g

Weight(Non-flanged/Flanged):19g/24g

The intensity of antistatic:2000V


Table 3 Electric characteristics

No.

Parameter

Conditions

HSSA28D5

HSSA28D5F

HSSA28D12

HSSA28D12F

HSSA28D15

HSSA28D15F

Q/HW32168-2013

Q/HW32169-2013

Q/HW32170-2013

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

Full load

4.95

5.05

11.88

12.12

14.85

15.15

Negative

4.95

5.05

11.88

12.12

14.85

15.15

Positive

Low/high

Full load

4.925

5.075

11.82

12.18

14.775

15.225

Negative

4.925

5.075

11.82

12.18

14.775

15.225

3

Output current/A

VIN=15V~50V

0.5

0.25

0.2

4

Output Power/W


0

5

0

6

0

6

5

Output Ripple Voltage/mV

BW≤6MHz,Io=Full

load

50

50

50

6

Line Regulation/mV

Positive

VIN=16V~40V,Io=Full

50

50

50

Negative

50

50

50

7

Lode Regulation/mV

Positive

Io=No load tofull

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

50

50

50

10

Efficiency/%

Io=Full

load

66

72

73

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 voltage cut-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/mV

One road 30% load, The other

Load 30%→70%

450

450

450

19

Step Load Response Transient(mV pK)

50%load→full load or

Full load→50% load

300

300

300

20

Step Load Response Recovery(μs)

50%load→full load or

Full load→50% load

400

450

500

21

Step Line Response Transient(mV pK)

VIN:16V→40V,

VIN:40V→16V,Io=Full load

900

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


5. Circuit block diagram of HSSA28D Series Transient Suppression DC DC Converters

Hybrid Surge Protection DC/DC Converter(HSSA28D Series)
Figure 1 the HSSA28D series transient suppression DC DC converter block diagram

6.Typical Performance Curves(Testing condition as per Tc=25℃,VIN=28V±5%,unless otherwise specified) of HSSA28D Series Transient Suppression DC DC Converters


Hybrid Surge Protection DC/DC Converter(HSSA28D Series)
Figure 2 HSSA28D15 Efficiency

Hybrid Surge Protection DC/DC Converter(HSSA28D Series)

Figure 3 HSSA28D15 step line response


Hybrid Surge Protection DC/DC Converter(HSSA28D Series)
Figure 4 HSSA28D15 Step Load Response

Hybrid Surge Protection DC/DC Converter(HSSA28D Series)
Figure 5 HSSA28D15 Start-up Overshoot/Start-up Delay

7.MTBF Curves of HSSA28D Series Transient Suppression DC DC Converters



Hybrid Surge Protection DC/DC Converter(HSSA28D Series)
Figure 6  MTBF Temperature Curves(HSSA28D15)

8. Pin Designation of HSSA28D Series Transient Suppression DC DC Converters


Hybrid Surge Protection DC/DC Converter(HSSA28D Series)
Figure 7 Pin Out Bottom View

Table 4 Pin Designation

Pin

Symbol

Designation

1

VO+

Positive Output

2

GNDO

Output Common

3

VO-

Negative Output

4

NC

NULL

5

INH

Inhibit

6

VIN

Positive Input

7

GNDI

Input Common

8

GNDC

Case Ground


9. Typical Connection Diagram of HSSA28D Series Transient Suppression DC DC Converters


Hybrid Surge Protection DC/DC Converter(HSSA28D Series)
Figure 8  Product  Connection Diagram

Hybrid Surge Protection DC/DC Converter(HSSA28D Series)
Figure 9   EMI Filter Connection Diagram


Hybrid Surge Protection DC/DC Converter(HSSA28D Series)
Figure 10 Inhibit Diver Diagram

10.Package Specifications (Unit: mm) of HSSA28D Series Transient Suppression DC DC Converters

① Package without flanged
Hybrid Surge Protection DC/DC Converter(HSSA28D Series)
Hybrid Surge Protection DC/DC Converter(HSSA28D Series)

Figure 11 Bottom View

Figure 12 Side View



② Package with Flanged
Hybrid Surge Protection DC/DC Converter(HSSA28D Series)
Hybrid Surge Protection DC/DC Converter(HSSA28D Series)

Figure 13 Bottom View

Figure 14 Side View


Table 5  Package Outline

Dimension Symbols

Unit/mm

Minimum

Nominal

Maximum

A

-

6.86

7.16

Φb

0.51

0.64

0.77

D

-

27.23

27.57

E

-

27.23

27.57

e

-

5.08

-

e1

-

20.32

-

e2

-

10.16

-

L

4.95

5.21

-

ΦP

2.50

2.80

3.10

X1

-

39.0

39.50

X2

32.90

33.20

33.50



Table 6 Case Materials

Case Model

Header

Header Plating

Cover

Cover Plating

Pin

Pin Plating

Sealing Style

Notes

UPP2727-08a

(Non-Flanged)

Cold Rolled Steel(10#)

Nickel

Kovar

(4J42)

Nickel

Copper –coreCompound

Ni/Au

Compression Seal

Nickel Plating is for case ground pin

UPP2727-08u

(Flanged)

Cold Rolled Steel(10#)

Nickel

Kovar

(4J42)

Nickel

Copper –coreCompound

Ni/Au

Compression Seal

Nickel Plating is for case ground pin


11. Ordering Information of HSSA28D Series Transient Suppression DC DC Converters


Hybrid Surge Protection DC/DC Converter(HSSA28D Series)
Figure 15  Part Numbering Key

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.
  • Pins at inhibit terminal shall be hung in the air during no operation.
  • 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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