ECRI Microelectronics

HSSO28D Series Surge Protection DC DC Converters

1. Features of HSSO28D Series  Surge Protection DC DC Converters

High reliability features
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 HSSO28D 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 HSSO28D Series  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 HSSO28D Series 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 Electric Characteristics

No.

Items

Condition

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

HSSO28D5

HSSO28D15

Min

Max

Min

Max

1

Input Voltage/V

Low、High、Ambient Temperature

12

50

12

50

2

Output Voltage/V

Positive

Ambient, Full load

4.95

5.05

14.85

15.15

Negative

-5.05

-4.95

14.40

15.60

Positive

Low/high, Full load

4.8

5.2

-15.15

-14.85

Negative

-5.2

-4.8

-15.60

-14.40

3

Output current/A

VIN=15V~50V

0.15

0.05

4

Output Power/W


0

1.5

0

1.5

5

Output Ripple Voltage/mV

BW≤20MHz,Full load

50

100

6

Line Regulation/mV

Positive

VIN=12V~50V,Full load

150

150

Negative

150

150

7

Load Regulation/mV

Positive

10% load →full

400

700

Negative

400

700

Positive

50% load→full

250

250

Negative

250

250

8

Input current/mA

Inhibited

3.5

3.5

Io=no load

10

14

9

Input Ripple current/mA

BW≤20MHz,Full load

30

30

10

Efficiency/%

Full load

72

73

11

Isolation/MΩ

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

100

100

12

Inhibitvoltage


0

0.7

0

0.7

13

Under voltageturn-on voltage/V

Full load

6.5

11.5

6.5

11.5

14

Short Circuit Protection


15

Capacitive load

/μF

Tc=25℃

500

200

16

Switching frequency/kHz

Full Load

325

475

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

500

400

19

Step Line Response Transient(mV pK)

VIN:16V→40V,

VIN:40V→16V,Io=Full load

400

600

20

Step Line Response Recovery(μs)

VIN:16V→40V

VIN:40V→16V

Io=Full load

600

600

21

Start-up Overshoot(mV pK)

VIN:0→28V,

Io=Full load

25

50

22

Start-up Delay (ms)

VIN:0→28V,

Io=Full load

20

20



5. Circuit block diagram of HSSO28D Series Surge Protection DC-DC Converters

hsso28d-series-circuit-block-diagram


Fig 1 HSSO28D Series circuit block diagram


6. Typical Characteristic Curve of HSSO28D Surge Protection DC-DC Converters (Testing condition as per Tc=25℃,VIN=28V±5%, unless otherwise specified)


fig-2--hsso28d15-efficiency-curve
Fig 2  HSSO28D15 Efficiency Curve


fig-3-hsso28d15-step-line-response
Fig 3 HSSO28D15 Step Line Response


fig-4-hsso28d15-step-load-response


Fig 4 HSSO28D15 Step Load Response

Fig 5 HSSO28D15 Start-up Overshoot/Start-up Delay


Fig 5 HSSO28D15 Start-up Overshoot/Start-up Delay

7. MTBF Curve of HSSO28D Series Surge Protection DC to DC Converters


Fig 6 MTBF Temperature Curve(HSSA28D15) (Well ground condition
Fig 6  MTBF Temperature Curve(HSSA28D15)


(Well ground condition)


8. Pin Designations of HSSO28D Series Surge Protection DC to 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

VO-

NC

7

INH

Inhibit


9. Typical Connection Diagram of HSSO28D Series Surge Protection DC to 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 HSSO28D Series Surge Protection DC to DC Converters



Fig 11 Bottom 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

-

-

Notes: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

Au

4J50

Au

Energy storage welding



11. Ordering Information of HSSO28D Series Surge Protection DC to DC Converters


numeber-key


Fig 13  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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