ECRI Microelectronics

HSSO28S Series of Surge Protection DCDC Converters

1. Features of HSSO28S Series of  Surge Protection DC DC Converters

High reliability
Wide input voltage range:12V~50V,typical DC input voltage: 28V
Maximum input transient voltage:80V,1s
Output Power PO:1.5W
Operating temperature range Tc:-55℃~+125℃
Low Startup current
No output overshoot
Inhibit function
Under-voltage input lock and output short circuit protection
Hermetically sealed metal case


2. Scope of application of HSSO28S Series  Surge Protection DC DC Converters

High-reliability electronic system for aviation , aerospace and some applications of high input transient suppression requirements.

3. Descriptions of HSSO28S Series of  Surge Protection DC DC Converters

This series products are high reliable DC DC converter featured with transient protection (80 v, 1 s) . Single ended flyback, pulse width modulated and transformer magnetic feedback topology design are used in these products.,The operating principle is that the sampling signal of output voltage, coupled by the transformer, 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 provide the HSSO28S Series converters with high reliability and optimum miniaturization. The design and manufacturing process of HSSO28S Series converters are in compliance with MIL-PRF-38534.

4.Technical Specifications of HSSO28S Series of Surge Protection DC DC Converters

Table 2 Rated conditions and recommended operating conditions

Absolute Max. Rating

Input voltage:12V~50V

Input voltage(Transient,1s):80V

Output Power:1.62W

Storage temperature:-65℃~150℃

Mechanical Shock:1500g

Lead resistance to welding temperature:300℃(15s)

Weight:11g

Antistatic intensity:2000V


Table 3 Electrical characteristics

No.

Items

Condition

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

HSSO28S3R3

HSSO28S5

HSSO28S12

Min

Max

Min

Max

Min

Max

1

Input Voltage/V

Low、High、Ambient Temperature

12

50

12

50

15

50

2

Output Voltage/V

Full

Load

Ambient

3.267

3.333

4.95

5.05

11.88

12.12

Low/high

3.17

3.43

4.8

5.2

11.52

12.48

3

Output current/A

VIN=12V~50V

0.3

0.3

0.125

4

Output Power/W


0

1

0

1.5

0

1.5

5

Output Ripple Voltage/mV

BW≤20MHz,Full load

50

50

50

6

Line Regulation/mV

VIN=12V~50V,Full load

150

150

60

7

Load Regulation/mV

10% load →full

400

400

700

50% load→full

250

250

250

8

Input current/mA

Inhibited

3.5

3.5

3.5

Io=no load

10

10

10

9

Input Ripple current/mA

BW≤20MHz,

Full load


30

30

30

10

Efficiency/%

Full load

69


72

75

11

Isolation/MΩ

Input to output or any pin to case at 500V,Tc=25℃

100


100

100

12

Inhibitvoltage


0

0.7

0

0.7

0

0.7

13

Under voltageturn-on voltage/V

Full load

6.5

11.5

6.5

11.5

6.5

11.5

14

Short Circuit Protection


With

With

With

15

Capacitive load

/μF

Tc=25℃

-

500

500

200

16

Switching frequency/kHz

Full Load

325

475

325

475

325

475

17

Step Load Response Transient(mV pK)

50%load→full load or

full load→50%load

-300

300

-300

300

-300

300

18

Step Load Response Recovery(μs)

50%load→full load or

full load→50%load

500

600

400

19

Step Line Response Transient(mV pK)

VIN:12V→50V,

VIN:50V→12V,Io=Full load

-300

300

-400

400

-400

400

20

Step Line Response Recovery(μs)

VIN:12V→50V

VIN:50V→12V

Io=Full load

500

600

400

21

Start-up Overshoot(mV pK)

VIN:0→28V,

Io=Full load

15

25

50

22

Start-up Delay (ms)

VIN:0→28V,

Io=Full load

20

20

20


Form 3(Continued) Electrical characteristics

No.

Items

Conditions

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

HSS028S15

Min

Max

1

Input Voltage/V

Low、High、Ambient Temperature

12

50

2

Output Voltage/V

Io=Full

Load

Ambient

14.85

15.15

Low/high

14.40

15.60

3

Output current/A

VIN=12V~50V

0.05

4

Output Power/W


0

1.5

5

Output Ripple Voltage/mV

BW≤20MHz,Full load

50

6

Line Regulation/mV

VIN=12V~50V,Full load

60

7

Load Regulation/mV

10% load →full

700

50% load→full

250

8

Input current/mA

Inhibited

3.5

Io=no load

10

9

Input Ripple current/mA

BW≤20MHz,Io=Full load

50

10

Efficiency/%

Fullload

76

11

Isolation/MΩ

Input to output or any pin to case at 500V,Tc=25℃

100

12

Inhibitvoltage


0

0.7

13

Under voltage open voltage/V

Full load

6.5

11.5

14

Short Circuit Protection


With

15

Capacitive load

/μF

Tc=25℃

200

16

Switching frequency/kHz

Io=Full

Load

325

475

17

Step Load Response Transient(mV pK)

50%load→full load or

full load→50%load

-300

300

18

Step Load Response Recovery(μs)

50%load→full load or

full load→50%load

400

19

Step Line Response Transient(mV pK)

VIN:12V→50V,

VIN:50V→12V,Io=Full load

-400

400

20

Step Line Response Recovery(μs)

VIN:12V→50V

VIN:50V→12V

Io=Full load

400

21

Start-up Overshoot(mV pK)

VIN:0→28V,

Io=Full load

50

22

Start-up Delay (ms)

VIN:0→28V,

Io=Full load

20

a. Theoutput load should not be less than 10% of the rated load.


5. Circuit block diagram of HSSO28S Series of  Surge Protection DC DC Converters


Fig 1 HSSO28S Series circuit block diagram
Fig 1 HSSO28S Series circuit block diagram


6. Typical Characteristic Curve of HSSO28S Series of  Surge Protection DC DC Converters (Testing condition as per Tc=25℃,VIN=28V±5%,unless otherwise specified)



Fig 2 HSSO28S15 Efficiency Curve
Fig 2 HSSO28S15 Efficiency Curve



Fig 3 HSSO28S15 Step Line Response
Fig 4 HSSO28S15 Step Load Response


Fig 4 HSSO28S15 Step Load Response
Fig 5 HSSO28S15 Start-up Overshoot/Start-up Delay


Fig 5 HSSO28S15 Start-up Overshoot/Start-up Delay

7. MTBF Curve of HSSO28S Series of Surge Protection DC DC Converters


Fig 6  MTBF Temperature Curve(HSSO28S15)

(Well ground condition)


8. Pin Designations of HSSO28S Series of Surge Protection DC DC Converters


Fig 7 Bottom View
Fig 7 Bottom View



Table 4 Pin Designations

Pin

Symbol

Designation

1

VIN

Positive input

2

GNDI

Input ground

3

VO

Positive output

4

GNDO

Output ground

5

GNDC

Case ground

6

NC

NC

7

INH

Inhibit


9. Typical Connection Diagram of HSSO28S Series of Hybrid Surge ProtectionTransient Suppression DC DC Converters


fig-8--connection-diagram
Fig 8  Connection Diagram

Fig 9 EMI Filter Connection Diagram


Fig 9   EMI Filter Connection Diagram
Fig 10 Inhibit Driver Circuit Diagram


Fig 10 Inhibit Driver Circuit Diagram


10.Package Specifications (Unit: mm) of HSSO28S Series of Surge Protection DC DC Converters

fig-11-bottom-viewfig-12-side-view



Fig 11 Bottom View                                                                                                                                            Fig 12 Side View


Table 5  Package Outline

Symbols

Unit/mm

Minimum

Nominal

Maximum

A

-

-

7.38

фb

0.32

-

0.58

b1

2.16

-

2.76

b2

3.13

-

3.73

D

-

-

25.14

E

-

-

20.66

e

2.24

2.54

2.84

e1

4.78

5.08

5.38

e2

9.86

10.16

10.46

e3

17.28

17.78

18.28

e4

14.74

15.24

15.74

L

5.86

-

-

注:e、e1、e2、e3、e4  are interchangeable size, made by the shell manufacturing and inspection, this specification does not do the assessment requirements.




Table 6  Case Materials

Case Model

Header

Header Plating

Cover

Cover Plating

Pin

Pin Plating

Sealing

Notes

UPP2520-07

High quality carbon structural steel(08AL)

Au

SPCC-SD

Ni

4J50

Au

Energy storage welding




11. Ordering Information of HSSO28S Series of Surge Protection DC DC Converters


fig-15--part-numbering-key

Fig 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 using, the output load should not be less than 10% of the rated load
  • 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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