ECRI Microelectronics

HSTR28S Series Transient Protection DC DC Converters

1 Features of HSTR28S Series Transient Suppression DC/ DC Converters

High reliability
Wide input voltage range:15V~50V,Nominal DC input voltage: 28V
Surge protection voltage:80V,1s
Output Power PO:40W
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:41W/in3
Hermetically sealed metal case

2.  Scope of application of HSTR28S Series Transient Protection DC DC Converters

High-reliability electronic system for aviation and aerospace, etc

3.  Description of HSTR28S Series Transient Protection DC DC Converters

The HSTR28S series transient protection DC DC converter's device is highly reliable and is featured with surge protection (80v, 1s) for DC DC converter. Single ended, pulse width modulated and transformer magnetic feedback topology design is used in this device. The HSTR28S series transient protection DC DC converter's 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.
Devices are produced by using thick film hybrid integration process, and metal package sealing. The design and manufacturing process of HTR 28 Series of converters are in compliance with General Standards of Hybrid Integrated Circuits and detailed specification of manufacturing. Input terminal connected to the accessory power supply filter can improve the electro-magnetic compatibility of devices.

4. Technical Specifications of HSTR28S Series Transient Protection 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:41.5W

Storage temperature:-65℃~150℃

Mechanical Shock:1500g

Lead resistance welding temperature:300℃(15s)

Weight(without flange/ with flange):47g/55g

Antistatic intensity:2000V


Table 3 (a)  Electrical characteristics
No. Items Conditions HSTR28S3R3 HSTR28S5R2 HSTR28S8
HSTR28S3R3F HSTR28S5R2F HSTR28S8F
Min Max Min Max Min Max
1 Input Voltage/V Low、High、Ambient Temperature 15 50 15 50 15 50
2 Output Voltage/V Io=Full Ambient 3.25 3.35 5.14 5.26 7.92 8.08
Load Low/high 3.2 3.4 5.07 5.33 7.88 8.12
3 Output current/A VIN=15V~50V 6.06 6 4.4
4 Output Power/W
0 20 0 31 0 35
5 Output Ripple Voltage/mV BW=6MHz,Io=Full 50 50 50
load
6 Line Regulation/mV VIN=15V~50V,Io=Full 20 20 20
7 Load Regulation/mV Io=No load to load 50 50 50
8 Input current/mA Inhibit 6 6 6
Io=no load 60 60 60
9 Input Ripple current/mA BW=20MHz,Io=Full 50 50 50
load
10 Efficiency/% Io=Full 65 72 74
load
11 Isolation/MΩ Input to output or any pin to case(except pin 7、8)at 500V,TA=25℃ 100 100 100
12 Inhibit Function
0 0.7 0 0.7 0 0.7
13 Inhibit open-circuit Voltage/V Io=Full 9 13 10 14 10 14
Load
14 Under voltage open voltage/V Io=Full 12 14.8 12 14.8 12 14.8
Load
15 Under voltage cut-off voltage/V Io=Full 11 14.5 11 14.5 11 14.5
Load
16 Short Circuit Protection
Reduced flow pattern Reduced flow pattern Reduced flow pattern
17 Capacitive load Tc=25℃ 1000 1000 500
/μF
18 Switching frequency/kHz Io=Full 400 550 400 550 400 550
Load
19 External Synchro Frequency Range/kHz TC=25℃,full load,TTL electrical level(VIH≥4.5V,VIL≤0.8V),Duty Ratio  40%~60% 400 550 400 550 400 550
20 Step Load Response Transient(mV pK) 50%load→full load -500 500 -500 500 -500 500
→50%load
21 Step Load Response Recovery(μs) 50%load→full load 500 500 500
→50%load
22 Step Line Response Transient(mV pK) VIN:16V→40V, -600 600 -600 600 -600 600
VIN:40V→16V,Io=Full load
23 Step Line Response Recovery(μs) VIN:16V→40V 500 500 500
VIN:40V→16V
Io=Full load
24 Start-up Overshoot(mV pK) VIN:0→28V, 15 50 50
Io=Full load
25 Start-up Delay (ms) VIN:0→28V, 20 20 20
Io=Full load



Table3 (b) Electrical characteristics

No.

Parameter

Conditions

HSTR28S5

HSTR28S5F

HSTR28S12

HSTR28S12F

HSTR28S15

HSTR28S15F

Min

Max

Min

Max

Min

Max

1

Input Voltage/V

Low、High、Ambient Temperature

15

50

15

50

15

50

2

Output Voltage/V

Io=Full

Load

Ambient

4.95

5.05

11.88

12.12

14.85

15.15

Low/high

4.88

5.12

11.70

12.30

14.62

15.38

3

Output current/A

VIN=15V~50V

6

3.33

2.67

4

Output Power/W


0

30

0

40

0

40

5

Output Ripple Voltage/mV

BW=6MHz,Io=Full

load

50

50

50

6

Line Regulation/mV

VIN=15V~50V,Io=Full

20

20

20

7

Lode Regulation/mV

Io=No load to load

50

50

50

8

Input current/mA

Inhibit

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

72

76

77

11

Isolation/MΩ

Input to output or any pin to case(except pin 7、8) at 500V,TA=25℃

100

100

100

12

Inhibit Function


0

0.7

0

0.7

0

0.7

13

Inhibit open-circuit Voltage/V

Io=Full

Load

10

14

10

14

10

14

14

Under-voltage open voltage/V

Io=Full

Load

12

14.8

12

14.8

12

14.8

15

Under-voltage cut-off voltage/V

Io=Full

Load

11

14.5

11

14.5

11

14.5

16

Short Circuit Protection


Reduced flow pattern

Reduced flow pattern

Reduced flow pattern

17

Capacitive load

/μF

TA=25℃

1000

500

500

18

Step Load Response Transient(mV pK)

50%load→full load

→50%load

400

550

400

550

400

550

19

ExternalSynchro frequency range/kHz

Tc=25℃,full load,TTL electrical level(VIH≥4.5V,VIL≤0.8V),Duty Ratio 40%~60%

400

550

400

550

400

500

20

Step Load Response Recovery(μs)

50%load→full load

→50%load

-500

500

-700

700

-700

700

21

Step Line Response Transient(mV pK)

VIN:16V→40V,

VIN:40V→16V,Io=Full load

500

500

500

22

Step Line Response Recovery(μs)

VIN:16V→40V

VIN:40V→16V

Io=Full load

-600

600

-900

900

-900

900

23

Start-up Overshoot (mV pK)

VIN:0→28V,

Io=Full load

500

500

500

24

Start-up Delay (ms)

VIN:0→28V,

Io=Full load

50

50

50

25

Step Load Response Transient(mV pK)

50%load→full load

→50%load

20

20

20


5. Circuit block diagram of HSTR28S Series Transient Protection DC DC Converters

Hybrid Surge Protection DC/D Converter(HSTR28S Series)
Fig. 1  HSTR28S Series circuit block diagram

6. Typical Characteristic Curve(Unless otherwise specified, test conditions for the following curves in Fig2- Fig.5 are Tc=25℃,VIN=28V±5%,) of HSTR28S Series Transient Protection DC DC Converters


Hybrid Surge Protection DC/D Converter(HSTR28S Series)
Fig. 2  HSTR28S15 Efficiency

Hybrid Surge Protection DC/D Converter(HSTR28S Series)
Fig. 3  HSTR28S15  Input Step Line Response


Hybrid Surge Protection DC/D Converter(HSTR28S Series)
Fig. 4   HSTR28S15 Step Load Response

Hybrid Surge Protection DC/D Converter(HSTR28S Series)
Fig. 5   HSTR28S15 Start-up Overshoot/Start-up Delay

7.MTBF Curve of HSTR28S Series Transient Protection DC DC Converters


Hybrid Surge Protection DC/D Converter(HSTR28S Series)
Fig. 6  MTBF Temperature Curve(HSTR28S15)

8.Pin Designation of HSTR28S Series Transient Protection DC DC Converters

Hybrid Surge Protection DC/D Converter(HSTR28S Series)
Fig. 7  Pin Out Bottom View

Table 4   Pin Designation

Pin

Symbol

Designation

1

VI

Positive Input

2

INH

Inhibit

3

Sense-

SensitiveNegative Output

4

GNDO

OutputGround

5

VO

Positive Output

6

Sense+

Sensitive Positive Output

7

GNDC

Case Ground

8

GNDC

Case Ground

9

SYN

External Synchro Input

10

GNDI

InputGround


9.Typical Connection Diagram of HSTR28S Series Transient Protection DC DC Converters


Hybrid Surge Protection DC/D Converter(HSTR28S Series)
Fig. 8   Connection Diagram


Hybrid Surge Protection DC/D Converter(HSTR28S Series)
Fig. 9   EMI Filter Connection Diagram

Hybrid Surge Protection DC/D Converter(HSTR28S Series)
Fig. 10 Inhibit Driver Circuit Diagram

10.Package Outline Dimensions (Unit: mm) of HSTR28S Series Transient Protection DC DC Converters

① Package without flange
Hybrid Surge Protection DC/D Converter(HSTR28S Series)
Hybrid Surge Protection DC/D Converter(HSTR28S Series)

Fig. 11 Bottom View

Fig. 11 Bottom View


② Package with Flange
Hybrid Surge Protection DC/D Converter(HSTR28S Series)
Hybrid Surge Protection DC/D Converter(HSTR28S Series)

Fig. 13  Bottom View

Fig. 14  Side View


Table 5  Package Outline

Symbol

Unit/mm

Min

Typical

Max

A

10.66

Φb

0.87

1.00

1.13

D

54.40

e

10.16

e1

20.32

E

29.0

L

5.40

ΦP

3.80

4.10

4.40

X

74.00

X1

64.27

64.77

65.27


Table 6  Case Materials

Case Model

Header

Header Plating

Cover

Cover Plating

Pin

Pin Plating

Seal

Notes

UPP5429-10j

(without flange)

Cold Rolled Steel(10#)

Ni

Kovar

(4J42)

Ni

Cu –core Compound

Ni/Au

Parallel seam

Ni Plating is for case ground pin

UPP5429-10n

(with flange)

Cold Rolled Steel(10#)

Ni

Kovar

(4J42)

Ni

Cu Compound

Ni/Au

Parallel seam

Ni Plating is for case ground pin


11. Ordering Information of HSTR28S Series Transient Protection DC DC Converter

Hybrid Surge Protection DC/D Converter(HSTR28S Series)
Hybrid Surge Protection DC/D Converter(HSTR28S Series)

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.
  • This device has the sensitive terminal. Devices in use shall be correctly connected in accordance with specified drawings, in order to avoid damage to the device and ensure a good sensitive terminal contact.
  • Testing position shall be 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 package is 125℃, please use the Copper as the radiator, whose thickness should be 3mm, and area should lager than 100mm×65mm。
  • When ordering this device,the detail electrical specification shall be based on relevant standards. Data offered in this document shall be for reference only.




Related Products
Model Series Max. Output Power (W) Input DC Voltage (V) Output Voltage (V)

HSSA28D Series Transient Suppression DC DC Converters

6W 15V-50V 5V,12V,15V

HSDF28D Series Transient Suppression DC DC Converters

20W 15V-50V 5V,12V,15V

HSDF28S Series Transient Suppression DC DC Converters

20W 15V-50V 3.3V,5V,8V,12V,15V,18V,28V

HSTR28S Series Transient Protection DC DC Converters

40W 15V-50V 3.3V,5V,8V,12V,15V

HSTR28D Series Transient Protection DC DC Converters

40W 15V-50V 5V,8V,12V,15V

HSFM140 Series Transient Protection DC DC Converters

140W 16V-40V 46V