ECRI Microelectronics

HSDF28D Series Transient Suppression DC DC Converters

1 Features of HSDF28D Series Transient Suppression DC/ DC Converters

High reliability

                                        

Wide input voltage range: 15V~50V, Typical
DC input voltage: 28V

Surge protection voltage: 80V, 1s 

Output power PO:20W

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

Low startup current

No output overshoot

Inhibit function

Input under-voltage locked function

and output short circuit protection

Maximum power density: 38W/in3

Hermetically sealed metal case


 

2.  Scope of application of HSDF28D Series Transient Suppression DC DC Converters

High-reliability electronic system for aviation and aerospace, etc

3.  Descriptions of HSDF28D Series Transient Suppression DC DC Converters

The HSDF28D series transient suppression DC DC converters'device is high reliable and is featured with surge protection (80v, 1s) for DC DC converter. Single ended flyback, pulse width modulated and transformer magnetic feedback topology design are used in the HSDF28D series transient suppression DC DC converter's device. The operating principle 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 and short circuit protection.Thick film hybrid techniques provide the HSDF28D series transient suppression DC DC converter with high reliability and optimum miniaturization. The design and manufacturing process of HSDF28D series transient suppression DC DC converter is in compliance with MIL-PRF-38534 and detailed specifications.

4. Technical Specifications of HSDF28D Series Transient Suppression DC-DC Converters

Table  2  Rated conditions and recommended operating conditions

Absolute Max. Rating

Input voltage:15V~50V

Input voltage(Transient,1s):80V

Output Power: 22W

Storage temperature:-65℃~150℃

Mechanical Shock:1500g

Lead resistance welding temperature:300℃(15s)

Weight(withoutflange/ with flange): 31g/34g

Antistatic intensity:2000V


Table 3 Electrical characteristics

No.

Items

Conditions (Testing condition as perTc=25℃,VIN=28V±5%, unless otherwise specified)

HSDF28D5

HSDF28D5F

HSDF28D12

HSDF28D12F

HSDF28D12

HSDF28D12F

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

4.95

5.05

11.88

12.12

14.85

15.15

Negative

4.80

5.20

11.80

12.20

14.80

15.20

Positive

Low/high

4.925

5.075

11.82

12.18

14.80

15.20

Negative

4.75

5.25

11.52

12.48

14.40

15.60

3

Output current/A

VIN=15V~50V

1.5

0.833

0.666

4

Output Power/W


0

15

0

20

0

20

5

Output Ripple Voltage/mV

BW≤6MHz,Io=Full

load

60

50

60

6

Line Regulation/mV

Positive

VIN=16V~40V,Io=Full

50

50

50

Negative

50

50

50

7

LoadRegulation/mV

Positive

No load to full

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

60

60

60

10

Efficiency/%

Io=Full

load

73

78

79

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-voltagecut-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

One is 30% load, another one is from 30% to 70% load

500

500

500

19

Step Load Response Transient(mV pK)

50%load→full load

→50%load

400

400

400

20

Step Load Response Recovery(μs)

50%load→full load

→50%load

500

500

500

21

Step Line Response Transient(mV pK)

VIN:16V→40V,

VIN:40V→16V,Io=Full load

800

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 HSDF28D Series Transient Suppression DC-DC Converters

Hybrid Surge Protection DC/D Converter(HSDF28D Series)
Fig. 1 HSDF28D Series circuit block diagram

6.Typical Characteristic Curve

of HSDF28D Series Transient Suppression DC-DC Converters


(Testing condition as per Tc=25℃, VIN=28V±5%, unless otherwise specified)


Hybrid Surge Protection DC/D Converter(HSDF28D Series)
Fig. 2  HSDF28D Efficiency

Hybrid Surge Protection DC/D Converter(HSDF28D Series)
Fig. 3  HSDF28D15 Step Line Response

Hybrid Surge Protection DC/D Converter(HSDF28D Series)
Fig. 4  HSDF28D15 Step Load Response

Hybrid Surge Protection DC/D Converter(HSDF28D Series)
Fig. 5  HSDF28D15 Start-up Overshoot/Start-up Delay

7.MTBF Curve of HSDF28D Series Transient Suppression DC to DC Converters


Hybrid Surge Protection DC/D Converter(HSDF28D Series)
Fig. 6  MTBF Temperature Curve(HSDF28D15)

8. Pin Designation of HSDF28D Series Transient Suppression DC to DC Converters


Hybrid Surge Protection DC/D Converter(HSDF28D Series)
Fig 7  Pin Out Bottom View

Table 4 Pin Designation

Pin

Symbol

Designation

1

INH

Inhibit

2

VO+

Positive Output

3

GNDO

Output Common

4

VO-

Negative Output

5

NC

No connection

6

GNDC

Case Ground

7

GNDI

Input Common

8

VIN

Positive Input



9.Typical Connection Diagram of HSDF28D Series Transient Suppression DC to DC Converters


Hybrid Surge Protection DC/D Converter(HSDF28D Series)
Fig. 8   Connection Diagram

Hybrid Surge Protection DC/D Converter(HSDF28D Series)
C1=C3=10uF,; C2=C4=0.1Uf, C1-C4 are all multilayer capacitors
Fig. 9   EMI Filter Connection Diagram

Hybrid Surge Protection DC/D Converter(HSDF28D Series)
Fig 10  Inhibit Driver Circuit Diagram

10.Package Specifications (Unit: mm) of HSDF28D Series Transient Suppression DC to DC Converters

① Package without flange
Hybrid Surge Protection DC/D Converter(HSDF28D Series)
Hybrid Surge Protection DC/D Converter(HSDF28D Series)

Fig. 11 Bottom View

Fig. 12  Side View


② Package with Flange
Hybrid Surge Protection DC/D Converter(HSDF28D Series)
Hybrid Surge Protection DC/D Converter(HSDF28D Series)

Fig. 13  Bottom View

Fig. 14 Side View


Table 5  Package Outline

Symbol

Unit/mm

Min

Typical

Max

A

-

8.4

8.90

A1

1.20

1.50

1.80

φb

0.63

0.76

0.89

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


50.80

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

Seal

Notes

UPP3728-08t

(without flange)

Cold Rolled Steel(10#)

Ni

Kovar

(4J42)

Ni

Cu-coreCompound

Ni/Au

Parallel seam

Ni Plating is for case ground pin

UPP3728-08j

(with flange)

Cold Rolled Steel(10#)

Ni

Kovar

(4J42)

Ni

Cu–core Compound

Ni/Au

Parallel seam

Ni Plating is for case ground pin


11. Ordering Information of HSDF28D Series Transient Suppression DC to DC Converters


Hybrid Surge Protection DC/D Converter(HSDF28D Series)
Hybrid Surge Protection DC/D Converter(HSDF28D Series)
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 pin bottom 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 the temperature of case is 125℃, the thickness of heat sink (copper) should be 3mm and the area should be more than 70mm×50mm.
  • When ordering this device,the detail electrical specification shall be based on relevant standards. Data offered in this document shall be for reference only.


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