ECRI Microelectronics

HSTR28D Series Transient Protection DC DC Converters

1 Features of HSTR28D 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 HSTR28D Series Transient  ProtectionDC DC Converters

High reliability electronic system for aviation and aerospace, etc

3.  Descriptions of HSTR28D Series TransientProtectionDC DC Converters

The HSTR28D 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 HSTR28D 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.

Thick film hybrid techniques provide the HTR 28 Series of converter with high reliability and optimum miniaturization. The design and manufacturing process of HTR 28 Series of converters are in compliance with MIL-PRF-38534 and detailed specifications.


4. Technical Specifications of HSTR28D Series TransientProtection 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:44W

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 Electrical characteristics
No. Items Conditions HSTR28D5 HSTR28D12 HSTR28D15
HSTR28D5F HSTR28D12F HSTR28D15F
Min Max Min Max Min Max
1 Input Voltage/V Low, High, Ambient Temperature 15 50 15 50 15 50
2 Output Voltage/V P Ambient, full load 4.95 5.05 11.88 12.12 14.85 15.15
Output current/A N 4.95 5.05 11.88 12.12 14.85 15.15

P Low/high, full load 4.93 5.07 11.82 12.18 14.7 15.3

N 4.93 5.07 11.82 12.18 14.7 15.3
3 Input Voltage/V VIN=15V~50V 3 1.67 1.33
4 Output Voltage/V
0 30 0 40 0 40
5 Output Ripple Voltage/mV BW≤20MHz, full load 60 50 50
6 Voltage Regulation/mV P VIN=16V~40V, full load 50 50 50
N 50 50 50
7 Load Regulation/mV P IO=0→full load 50 50 50
N 50 50 50
8 Input Current/mA Inhibit 6 6 6
IO=0 60 60 60
9 Input Ripple current /mA BW≤20MHz, full load 50 50 50
10 Efficiency/% full load 73 78 79
11 Isolation Input to output or any pin to case(except pin 7, 8)at 500V, TA=25℃ 100 100 100
/MΩ
12 Inhibit Voltage
0 0.7 0 0.7 0 0.7
13 Inhibit open-circuit Voltage/V full load 10 14 10 14 10 14
14 Under voltage open voltage/V full load 12 14.8 12 14.8 12 14.8
15 Under voltage cut-off voltage/V 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 Tc=25℃ 500 500 500
/μF
18 Switching frequency/kHz full load 400 500 400 500 400 500
19 External Synchro Frequency Range/kHz Tc=25℃, full load, TTL electrical level(VIH≥4.5V, VIL≤0.8V), Load  Ratio 40%~60% 400 500 400 500 400 500
20 Cross Regulation/mV One is 30% load, another one is from 30% to 70% load 650 650 650
21 Step Load Response Transient(mV pK) 50% load→full load or full load→50% load 400 450 500
22 Step Load, Output Voltage Recovery/μs 50% load→full load or full load→50% load 350 400 300
23 Input Voltage Transient, Output Voltage(Peak)/mV Input VoltageVIN; 16V→40V,full load or Input VoltageVIN; 40V→16V,full load 600 900 900
24 Input Voltage Transient, Output Voltage Recovery/μs Input VoltageVIN; 16V→40V,full load or Input VoltageVIN; 40V→16V, full load 500 500 500
25 Start-up Overshoot(mV pK) Input VoltageVIN; 0→28V, full load 50 50 50
26 Start-up Delay (ms) Input VoltageVIN; 0→28V, full load 20 20 20


5. Circuit block diagram of HSTR28D Series Transient Protection DC-DC Converters

Hybrid Surge Protection DC/D Converter(HSTR28D Series)
Fig. 1  HSTR28D Series circuit block diagram

6.Typical Characteristic Curve(Tc=25℃, VIN=28V±5%, Full load) of HSTR28D Series Transient Protection DC-DC Converters


Hybrid Surge Protection DC/D Converter(HSTR28D Series)
Fig. 2  HSTR28D15 Efficiency

Hybrid Surge Protection DC/D Converter(HSTR28D Series)
Fig. 3   HSTR28D15 Step Line Response

Hybrid Surge Protection DC/D Converter(HSTR28D Series)
Fig. 4   HSTR28D15 Step Load Response

Hybrid Surge Protection DC/D Converter(HSTR28D Series)
Fig. 5   HSTR28D15 Start-up Overshoot/Start-up Delay

7.MTBF Curve of HSTR28D Series Transient Protection DC to DC Converters



Hybrid Surge Protection DC/D Converter(HSTR28D Series)
Fig. 6  MTBF Temperature Curve(HSTR28D15)

8.Pin Designation of HSTR28D Series Transient Protection DC to DC Converters

Hybrid Surge Protection DC/D Converter(HSTR28D Series)
Fig. 7  Pin Out Bottom View

Table 4 Pin Designation

Pin

Symbol

Designation

1

VIN

Positive Input

2

INH

Inhibit

3

VO+

Positive Output

4

GNDO

Output Common

5

VO-

Negative Output

6

GNDC

Case

7

GNDC

Case

8

GNDC

Case

9

SYNC

External Synchro Input

10

GNDI

Input Common


9. Typical Connection Diagram of HSTR28D Series Transient Protection DC to DC Converters



Hybrid Surge Protection DC/D Converter(HSTR28D Series)
Fig. 8    Connection Diagram


Hybrid Surge Protection DC/D Converter(HSTR28D Series)
Fig. 9   EMI Filter Connection Diagram


Hybrid Surge Protection DC/D Converter(HSTR28D Series)
Fig. 10   Inhibit Driver Circuit Diagram

10.Package Specifications (Unit: mm) of HSTR28D Series Transient Protection DC to DC Converters

① Package without flange
Hybrid Surge Protection DC/D Converter(HSTR28D Series)
Hybrid Surge Protection DC/D Converter(HSTR28D Series)

Fig. 11  Bottom View

Fig. 12  Side View


② Package with Flange
Hybrid Surge Protection DC/D Converter(HSTR28D Series)
Hybrid Surge Protection DC/D Converter(HSTR28D 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

29.00

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

UPP5429-10g

(without flange)

Cold Rolled Steel(10#)

Ni

Kovar

(4J42)

Ni

Cu–core Compound

Ni/Au

Parallel seam

Ni Plating is for case ground pin

UPP5429-10f

(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 HSTR28D Series Transient Protection DC to DC Converters


Hybrid Surge Protection DC/D Converter(HSTR28D Series)

Hybrid Surge Protection DC/D Converter(HSTR28D 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 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.



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