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The HHF28 Series of military grade DC-DC converter offer up to 15 watts of output power with high reliability. The HHF28 series’ small size, light weight, and hermetically sealed metal packages make them ideal for use in aviation aerospace and other high reliability applications.

Single/Double/Triple : Single
Output Voltage (V) : 5V,12V,15V
Max. Output Power (W) : 15W

Product Detail

1 FEATURES of HHF28 Series High Reliability DC/DC Converters

• 16 to 40 VDC input, typical 28V
• 15W output power
• -55℃ to＋125℃ operation
• Fully isolated
• More than100MΩ(500V DC) isolation
• Inhibit function and indefinite short circuit protection
• High Power Density: 28 W/in3
• Equivalent with Interpoint’s MHF Series
• Hermetically sealed metal cases

MODELS

SINGLE

DUAL

HHF28S3R3(F)

HHF28S5(F)

HHF28S5R2(F)

HHF28S12(F)

HHF28S15(F)

HHF28S28(F)

HHF28S08(F)

HHF28D5(F)

HHF28D12(F)

HHF28D15(F)

HHF28D5N

HHF28D6N

HHF28D12N

HHF28D15N

2 DESCRIPTION of HHF28 SeriesAerospace DC-DC Converter

The HHF28 Series of DC-DC converter offer up to 15 watts of output power with high reliability. The HHF28 series’ small size, light weight, and hermetically sealed metal packages make them ideal for use in aviation aerospace and other high reliability applications.
The HHF 28 series of converter use forward pulse width modulated topology design. 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 close loop control can create constant voltage output and short circuit protection. The magnetic feedback technology can effectively prevent the magnetic saturation of transformer and also products reliability can be improved.
Thick film hybrid techniques provide the HHF28 Series of converter with reliability levels and optimum miniaturization. The design and manufacturing process of HHF28 Series of converters are in compliance with General Standards of Hybrid Integrated Circuits and detailed standards of manufacturing. Connected to a HFD-CE03 filter, the HHF Series of converter can achieve better electromagnetic compatibility (EMC) performance.

3 ELECTRICAL PERFORMANCE of HHF28 Series Aerospace DC-DC Converter

ABSOLUTE MAXIMUM RATINGS
• Input Voltage: 16~44
• Power dissipation: 6W
• Lead Soldering Temperature : 300°C (10 sec per lead)
• Storage Temperature Range (Case): -55℃ ~ +125℃
• Inhibit voltage: ≤0.2V
• Outside Sync. Signal:
Frequency Range: 450~600kHz
Duty Cycle:40%~60%
TTL: 0.8≤V≤4.5V

RECOMMENDED OPERATING CONDITIONS
• DC Input voltage range :16~ 40V HF28S5(F) HHF28S12(F) HHF28S15(F)

Table 2 Electrical Characteristics: (TCASE = -55°C to +125°C, VIN = +28V ± 0.5V, Full Load5, Unless Otherwise Specified)

Single output models				HHF28S5(F)		HHF28S12(F)		HHF28S15(F)
Parameter		Conditions		Min	Max	Min	Max	Min	Max
Output Voltage (V)		Io=full load	Ambient temperature	4.95	5.05	11.88	12.12	14.85	15.15
			high and low temperature	4.85	5.15	11.76	12.24	14.7	15.3
Output Current(A)t		VIN = 16 TO 40 VDC		-	2.4	-	1.25	-	1
Output Power(W)		-		-	12	-	15	-	15
Output Ripple Voltage (mV)		BW=10 kHz to 2 MHz	Ambient temperature	-	80	-	80	-	80
		Io=full load	high and low temperature	-	100	-	120	-	120
Line Regulation(mV)		VIN = 16 TO 40 VDC,Io=full load		-	50	-	50	-	50
Load Regulation(mV)		Io=No load to load		-	50	-	50	-	50
Input Ripple Current(mA)	BW=10kHz-2MHz	Ambient temperature		-	80	-	80	80-
	Io=full load	high and low temperature		-	100	-	120	-	120
Efficiency (%)	Io=full load	Ambient temperature		75	-	76	-	78	-
		high and low temperature		72	-	74	-	74	-
Isolation (MΩ)		Input to output or any pin to case (except case ground pin) at 500 VDC, TA = 25° C		100	-	100	-	100	-
Inhibit Function		TA = 25° C，Inhibit voltage, output disabled		have		have		have
Protection Function		TA = 25° C
Start-up Overshoot mV pk		Vin=0 to 28V, Io=full load		-	600	-	1200	-	1500
Start-up Delay(ms)		Vin=0 to 28V, Io=full load		-	25	-	25	-	25
Capacitive Load(µF)		TA = 25° C, No effect on DC performance		-	300	-	100	-	100
Switching Frequency(kHz)		Io=full load		400	600	400	600	400	600
Step Load Response Transient(mV pK)		50% load -- full load -50% load		-400	400	-500	500	-600	600
Step Load Response		50% load -- full load -50% load		-	300	-	300	-	300
Recovery t (µs)
Step Line Response Transient (mV pK)		Vin=16~40V, Io=full load Vin=40~16V, Io=full load		-800	800	-800	800	-800	800

Step Line Response		Vin=16~40V, Io=full load Vin=40~16V, Io=full load		-	1200	-	1200	-	1200
Recovery t (µs )
Load Fault Short Circuit recovery (ms)		short circuit to full load		-	30	-	30	-	30

Notes to Specifications:

The step load transition time should be greater than or equal to 10μs.
The step line transition time should be greater than or equal to 10μs.
Recovery time is measured from application of the transient to point at which VOUT is within 1% of VOUT at final value.

HHF28S3R3(F) , HHF28S5R2(F)

Table 3 Electrical Characteristics: (TCASE = -55°C to +125°C, VIN = +28V ± 0.5V, Full Load5, Unless Otherwise Specified)

Single output models			HHF28S3R3(F)		HHF28S5R2(F)
Parameter	Conditions		Min	Max	Min	Max
Output Voltage (V)	Io=full	Ambient temperature	3.2	3.4	5.15	5.25
	load	high and low temperature	3.1	3.5	5.04	5.36
Output Current(A)t	-		-	2.4	-	2.4
Output Power(W)	-		-	8	-	12
Output Ripple Voltage (mV)	BW=10 kHz to2 MHz(BW≤20MHz)Io=full load	Ambient temperature	-	80	-	50
		high and low temperature	-	240	-	100
Line Regulation (mV)	VIN = 16 TO 40 VDC,( VIN = 10 TO 20 VDC) Io=full load		-	100	-	50

Load Regulation(mV)	Io=No load to load		-	50	-	50
Input Ripple Current (mA)	BW=10kHz-2MHz, Io=full load	Ambient temperature
		high and low temperature
Efficiency (%)	Io=full load	Ambient temperature	70	-	75	-
		high and low temperature	67	-	72	-
Isolation (MΩ)	Input to output or any pin to case (except case ground pin) at 500 VDC, TA = 25° C		100	-	100	-

Inhibit Function	TA = 25° C，Inhibit voltage, output disabled		have		have
Protection Function	TA = 25° C
Start-up Overshoot mV pk	Vin=16 to 40V, Io=full load		-	300	-	600
Start-up Delay (ms)	Vin=16 to 40V, Io=full load		-	25	-	25

Capacitive Load(µF)	TA = 25° C, No effect on DC performance		-	300	-	300
Switching Frequency(kHz)	Io=full load		400	600	400	600
Step Load Response Transient(mV pK)	50% load -- full load -50% load		-400	400	-400	400
Step Load Response Recovery t (µs)	50% load -- full load -50% load		-	300	-	300

Step Line Response Transient (mV pK)	Vin=16~40V, Io=full load Vin=40~16V, Io=full load		-800	800	-800	800

Step Line Response Recovery t (µs )	Vin=16~40V, Io=full load Vin=40~16V, Io=full load		-	1200	-	1200

Load Fault Short Circuit recovery (ms)	short circuit to full load		-	30	-	30

Notes to Specifications:

The step load transition time should be greater than or equal to 10μs.
The step line transition time should be greater than or equal to 10μs.
Recovery time is measured from application of the transient to point at which VOUT is within 1% of VOUT at final value.

HHF28S28(F), HHF28S08F
Table4 Electrical Characteristics: (TCASE = -55°C to +125°C, VIN = +28V ± 0.5V)

Single output models				HHF28S28(F)		HHF28S08F
Parameter	Conditions			Min	Max	Min	Max
Output Voltage	Io=full		Ambient temperature	27.72	28.28	7.9	8.1
(V)	load		high and low temperature			7.8	8.2
Output Current(A)t	-			0	0.54	-	2
Output Power(W)	-			-	15	-	-
Output Ripple Voltage	BW=10 kHz to2 MHz(BW≤20MHz)Io=full load		Ambient temperature	-	120	-	30
(mV)			high and low temperature
Line Regulation	VIN = 16 TO 40 VDC,( VIN = 10 TO 20 VDC)			-	180	-	0.2(%)
(mV)	Io=full load
Load Regulation(mV)	Io=No load to load			-	180	-	0.5(%)
Input Ripple Current	BW=10kHz-2MHz,		Ambient temperature	-	-	-	-
(mA)	Io=full load		high and low temperature
Efficiency	Io=full load		Ambient temperature	78	-	75	-
(%)			high and low temperature
Isolation	Input to output or any pin to case (except case ground pin) at 500 VDC, TA = 25° C			100	-	100	-
(MΩ)
Inhibit Function		TA = 25° C，Inhibit voltage, output disabled		have		have
Protection Function		TA = 25° C
Start-up Overshoot mV pk	Vin=16 to 40V, Io=full load			-	1200	-	1200
Start-up Delay	Vin=16 to 40V, Io=full load			-	25	-	100
(ms)
Capacitive Load(µF)	TA = 25° C, No effect on DC performance			-	470	-	-
Switching Frequency(kHz)	Io=full load			375	525	-	-
Step Load Response Transient(mV pK)	50% load -- full load -50% load			-	-	-	-
Step Load Response	50% load -- full load -50% load			-	-	-	-
Recovery t (µs)
Step Line Response Transient (mV pK)	Vin=16~40V, Io=full load			-	-	-	-
	Vin=40~16V, Io=full load
Step Line Response	Vin=16~40V, Io=full load			-	-	-	-
Recovery t (µs )	Vin=40~16V, Io=full load
Load Fault Short Circuit recovery (ms)	short circuit to full load			-	-	-	-

Notes to Specifications:

The step load transition time should be greater than or equal to 10μs.
The step line transition time should be greater than or equal to 10μs.
Recovery time is measured from application of the transient to point at which VOUT is within 1% of VOUT at final value.

HF28D5(F), HHF28D12(F), HHF28D15(F)
Table 5 Electrical Characteristics: (TCASE = -55°C to +125°C, VIN = 28V ± 0.5V,Full Load5, Unless Otherwise Specified)

Dual output models			HHF28D5(F)		HHF28D12(F)		HHF28D15(F)
Parameter	Conditions		Min	Max	Min	Max	Min	Max
Output Voltage (V)	Io1= Io2= full load	Ambient temperature	4.95	5.05	11.88	12.12	14.85	15.15
		high and low temperature	4.85	5.15	11.76	12.24	14.7	15.3
		Ambient temperature	-5.08	-4.92	-12.18	-11.82	-15.23	-14.78
		high and low temperature	-5.18	-4.82	-12.3	-11.7	-15.38	-14.63
Output Current(A)t	VIN = 16 TO 40 VDC		-	1.2	-	0.625	-	0.5
Output Power(W)	-		-	12	-	15	-	15
Output Ripple Voltage (mV)	BW=10kHz to 2 MHz(BW≤20MHz) Io1= Io2= full load	Ambient temperature	-	80	-	80	-	80
		high and low temperature	-	120	-	120	-	120
		Ambient temperature	-	80	-	80	-	80
		high and low temperature	-	120	-	120	-	120
Line Regulation(mV)	VIN = 16 TO 40 VDC, Io1= Io2= full load	+Vout	-	50	-	50	-	50
Line Regulation(mV)	VIN = 16 TO 40 VDC, Io1= Io2= full load	-Vout	-	80	-	100	-	100
Load Regulation(mV)	Io1= Io2=No load to full load	+Vout	-	50	-	50	-	50
Load Regulation(mV)	Io1= Io2=No load to full load	-Vout	-	100	-	100	-	100
Efficiency (%)	Io1= Io2=full load	Ambient temperature	77	-	76	-	76	-
Efficiency (%)	Io1= Io2=full load	high and low temperature	75	-	74	-	74	-
Isolation (MΩ)	Input to output or any pin to case (except case ground pin) at 500 VDC, TA = 25° C		100	-	100	-	100	-
Isolation (MΩ)			100	-	100	-	100	-
Inhibit Function	TA = 25° C，Inhibit voltage, output disabled		have		have		have
Protection Function	TA = 25° C		have		have		have
Start-up Overshoot mV pk	Vin=0 to 28V, Io1=Io2=full load	Ambient temperature	-	100	-	500	-	500
		high and low temperature	-	250	-	750	-	750
		Ambient temperature	-	100	-	500	-	500
		high and low temperature	-	250	-	750	-	750
Start-up Delay(ms)	Vin=0 to28V, Io1=Io2=full load		-	20	-	25	-	25
Capacitive Load(µF)	TA = 25° C, No effect on DC performance		-	47	-	10	-	10
Switchingfrequency(kHz)	Io=full load		400	600	400	600	400	600
Step Load Response Transient(mV pK)	50% load to full load or full load to 50% load,	Ambient temperature	-600	600	-600	600	-600	600
	Each Vout has balanced load	high and low temperature	-700	700	-700	700
		Ambient temperature	-600	600	-600	600
		high and low temperature	-700	700	-700	700
Step Load Response Recovery t (µs)	50% load to full load or full load to 50% load,Each Vout has balanced load		-	500	-	500	-	500
Step Load Response Recovery t (µs)			-	500	-	500	-	500
Step Line Response Transient (mV pK)	Vin=16~40V, Io1= Io2=full load		-800	800	-750	750	-750	750
Step Line Response Recovery t (µs )	Vin=16~40V, Io1= Io2=full load		-	1200	-	1200	-	1200
Step Line Response Recovery t (µs )	Vin=16~40V, Io1= Io2=full load		-	1200	-	1200	-	1200
Load Fault Short Circuit recovery (ms)	Io1= Io2 short circuit to full load		-	30	-	50	-	50

Notes to Specifications:

The step load transition time should be greater than or equal to 10μs.
The step line transition time should be greater than or equal to 10μs.
Recovery time is measured from application of the transient to point at which VOUT is within 1% of VOUT at final value.

HHF28D5N, HHF28D6N, HHF28D15N
Table 6 Electrical Characteristics: (TCASE = -55°C to +125°C, VIN = +28V ± 0.5V)

Dual output models		HHF28D5N			HHF28D6N		HHF28D12N		HHF28D15N
Parameter	Conditions	Min		Max	Min	Max	Min	Max	Min	Max
Output Voltage (V)	Io1 = full load	+Vout		4.8	5.2	5.8	6.2	11.8	12.2	14.8	15.2
		-Vout		-5.2	-4.8	-6.2	-5.8	-12.2	-11.8	-15.2	-14.8
Output Current(A)	-	-		2	-	2	-	1	-	0.8
		-	0.2	-	0.2	-	0.2	-	0.2
Output Power(W)	-	-		11	-	13	-	14	-	15
Output Ripple Voltage(mV)	Io= full load	-		40	-	40	-	40	-	40
Line Regulation(mV)	Io= full load	-		20	-	20	-	20	-	20
Load Regulation(mV)	Io=No load to full load	-		50	-	50	-	50	-	50
Efficiency (%)	Io= full load	70		-	70	-	70	-	70	-
Isolation (MΩ)	Input to output or any pin to case (except case ground pin) at 500 VDC, TA = 25°C	100		-	100	-	100	-	100	-
Inhibit Function		TA = 25°C，Inhibit voltage (0~0.2V), output disabled			have	have		have	have
Protection Function		TA = 25°C

4 TYPICAL PERFORMANCE CURVES of HHF28 Series Aerospace DC-DC Converter

(1) Single output model HHF28S15


Figure 2 Efficiency (OUTPUT POWER)	Figure 3 STEP LINE RESPONSE

Figure 4 STEP LOAD RESPONSE	Figure 5 Start-up overshoot/ delay

(2) Dual output model HHF28D5


Figure 6 Efficiency (OUTPUT POWER)	Figure 7 STEP LINE RESPONSE

Figure 8 STEP LOAD RESPONSE	Figure 9 Start-up overshoot/ delay

5 TYPICAL MTBF CURVES of HHF28 Series Aerospace DC DC Converter


TEMPERATURE (℃) Figure10 Model HHF28S15	TEMPERATURE (℃) Figure 11 Model HHF28D15

6 TYPICAL CONNECTION DIAGRAM of HHF28 SeriesAerospace DC DC Converter


Figure12 Application Connection Diagram for Single output models	Figure13 Application Connection Diagram for Dual output models

Figure14 Inhibit Drive connection Diagram for Dual Output Models	Figure15 Dual Output Converter with EMI Filter Connection Diagram

7 PACKAGE SPECIFICATIONS of HHF28 Series Aerospace DC DC Converter



Figure16 Non-flanged outline	Figure17 Flanged outline

Table 7 Package Outline

Notes:

Character “A” is 8.6 mm for HHF15S5, HHF28S3R3 and HHF28S2R5.
Character “A” is 10 mm for HHF28S5 and HHF28S2R5-A

Table 8 Case Materials

Case Model	Header	Header Plating	Cover	Cover Plating	Pin	Pin Plating	Sealing Style	Notes
UPP32727-08f	Cold Rolled Steel（10#）	Nickel	Iron/Nickel Alloy（4J42）	Nickel	Copper Compound	Nickel/Gold	Compression Seal	Nickel plating is for pin6.

Notes:
Solder pins individually with heat application not exceeding 300°C for 10 seconds per pin.

8 PIN DESIGNATION of HHF28 Series Aerospace DC to DC Converter


Figure18 Pin Out Bottom View of non-flanged outline	Figure19 Pin Out Bottom View of flanged outline

Notes:

Pin 2 of HHF28S28(F)is for output.
Pin3 of HHF28S28 (F) can supply 14V output.
Pin4 of HHF28S28 (F) is for output common.
Pin 5 of HHF28S08 (F) is for no connection.

9 ORDERING INFORMATION of HHF28 Series Aerospace DC toDC Converter

Figure 20 Part Numbering Key
Application Notes:

The correct power supply is to be ensured that may not cause permanent damage to the device.
When the electrical performance is tested, the testing position should be pin of the device.
When the device is mounted, the bottom of the device should be closely attached to the circuit board. So as to avoid the damage of the pins, the shockproof should be increased when it is required
When the case temperature is at 105℃, it is suggested that thickness of the thermal sinking plate is 5mm, the dimension is greater than 120mm×100mm.
When the case temperature is at 125℃, it is suggested that thickness of the thermal sinking plate is 5mm, the dimension is greater than 120mm×100mm.
The pin should not be bending to avoid the glass insulator broken and cause the leakage.

To request a quotation or place orders please contact our sales representative or the ECRIM Sales Department at:
Sales Phone: (086) 0551-3667943 Sales Fax: (086) 0551-3638101
E-mail: sales@ecrim.cn

Tags : thick film DC-DC Converter military grade DC-DC Converter Single DC-DC converters

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Subject : 15W Aerospace DC-DC Converter

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Product Detail

1 FEATURES of HHF28 Series High Reliability DC/DC Converters

2 DESCRIPTION of HHF28 SeriesAerospace DC-DC Converter

3 ELECTRICAL PERFORMANCE of HHF28 Series Aerospace DC-DC Converter

4 TYPICAL PERFORMANCE CURVES of HHF28 Series Aerospace DC-DC Converter

5 TYPICAL MTBF CURVES of HHF28 Series Aerospace DC DC Converter

6 TYPICAL CONNECTION DIAGRAM of HHF28 SeriesAerospace DC DC Converter

7 PACKAGE SPECIFICATIONS of HHF28 Series Aerospace DC DC Converter

8 PIN DESIGNATION of HHF28 Series Aerospace DC to DC Converter

9 ORDERING INFORMATION of HHF28 Series Aerospace DC toDC Converter

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15W Aerospace DC-DC Converter

Sales 15W Aerospace DC-DC Converter

Product Detail

1 FEATURES of HHF28 Series High Reliability DC/DC Converters

2 DESCRIPTION of HHF28 SeriesAerospace DC-DC Converter

3 ELECTRICAL PERFORMANCE of HHF28 Series Aerospace DC-DC Converter

4 TYPICAL PERFORMANCE CURVES of HHF28 Series Aerospace DC-DC Converter

5 TYPICAL MTBF CURVES of HHF28 Series Aerospace DC DC Converter

6 TYPICAL CONNECTION DIAGRAM of HHF28 SeriesAerospace DC DC Converter

7 PACKAGE SPECIFICATIONS of HHF28 Series Aerospace DC DC Converter

8 PIN DESIGNATION of HHF28 Series Aerospace DC to DC Converter

9 ORDERING INFORMATION of HHF28 Series Aerospace DC toDC Converter

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Let's keep in touch!

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