40W Transient Protection DC DC Converters

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Output Voltage (V) : 3.3V,5V,8V,12V,15V
Input DC Voltage (V) : 15V-50V
Max. Output Power (W) : 40W

Product Detail

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
No.	Parameter	Conditions		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
2	Output Voltage/V	Io=Full Load	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
8	Input current/mA	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

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

Fig. 2 HSTR28S15 Efficiency

Fig. 3 HSTR28S15 Input Step Line Response

Fig. 4 HSTR28S15 Step Load Response

Fig. 5 HSTR28S15 Start-up Overshoot/Start-up Delay

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

Fig. 6 MTBF Temperature Curve（HSTR28S15）

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

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

Fig. 8 Connection Diagram

Fig. 9 EMI Filter Connection Diagram

Fig. 10 Inhibit Driver Circuit Diagram

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

① Package without flange


Fig. 11 Bottom View	Fig. 11 Bottom View

② Package with Flange


Fig. 13 Bottom View	Fig. 14 Side View

Table 5 Package Outline

Symbol	Unit/mm
Symbol	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 Plating

Seal

Notes

UPP5429-10j

（without flange）

Cold Rolled Steel（10#）

Kovar

(4J42)

Cu –core Compound

Ni/Au

Parallel seam

Ni Plating is for case ground pin

UPP5429-10n

（with flange）

Cold Rolled Steel（10#）

Kovar

(4J42)

Cu Compound

Ni/Au

Parallel seam

Ni Plating is for case ground pin

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

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.

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Subject : 40W Transient Protection DC DC Converters

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Product Detail

1 Features of HSTR28S Series Transient Suppression DC/ DC Converters

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

3. Description of HSTR28S Series Transient Protection DC DC Converters

4. Technical Specifications of HSTR28S Series Transient Protection DC DC Converters

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

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

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

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

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

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

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

Application Notes:

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40W Transient Protection DC DC Converters

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Product Detail

1 Features of HSTR28S Series Transient Suppression DC/ DC Converters

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

3. Description of HSTR28S Series Transient Protection DC DC Converters

4. Technical Specifications of HSTR28S Series Transient Protection DC DC Converters

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

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

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

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

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

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

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

Application Notes:

previous pots

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Let's keep in touch!

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