ECRI Microelectronics

HOL28S Series Hybrid Integrated DC-DC converters

1. Features of HOL28S Series Thick Film Hybrid Integrated DC-DC Converters

High reliability features
Input voltage range:16V~40V,Typical DC input voltage: 28V
Output power PO:66W~120W
Operating temperature range Tc:-55℃~+125℃
Low Start-up current
No output overshoot
Inhibit function
under-voltage and short circuit protection
Output short circuit and over-current protection
Output voltage fine tunable
Output sensing function
Maximum power density:100W/in3
Efficiency 92%
Hermetically sealed metal cases


2. Scope of application of HOL28S Series Hybrid Integrated DC DC Converters

High-reliability electronic system for aviation and aerospace, weapon and ships etc.

3. Description of HOL28S Series Hybrid Integrated DC to DC Converters

This series products are high reliable hybrid thick film large power DC/DC converter. By using half-bridge circuit topology and pulse width modulation principle, the output sampling voltage isolated by opto coupler to modulate the pulse width and form the closed-loop control to make the product a stable voltage output. This series products are made by thick film hybrid integrated process, hermetically sealed metal cases. Product design and manufacturing meets MIL-PRF-38534 requirements. Customers can connect the matching power EMI filters in the input port to improve the product’s electromagnetic compatibility.

4. Electrical performance of HOL28S Series Hybrid Integrated DC-DC Converters

Tabel2 Rated conditions and recommended operating conditions

Absolute Max. Rated value

Output voltage:15.5V~41V

Output power:120W

Storage temperature:-65℃~150℃

Mechanical Shock:1500g

Lead resistance to welding temperature:300℃(15s)

Weight:100g

ESD:2000V


Table 3 Electric characteristics

No.

Parameter

Conditions

(Unless other wise,-55℃≤Tc≤125℃,VIN=28V±5%)

HOL28S5

HOL28S6R3

HOL28S9R5

Min

Max

Min

Max

Min

Max

1

Input voltage/V

Low、High、Ambient Temperature

16

40

16

40

16

40

2

Output voltage/V

Full load

Ambient

4.9

5.1

6.25

6.35

9.405

9.595

Low/high

4.8

5.2

6.2

6.4

9.405

9.595

3

Output current/A

VIN=16V~40V

-

24

-

16.8

-

12.6

4

Output Power/W


-

120

-

105

-

120

5

Output Ripple Voltage/mV

BW≤20MHz,Full load

-

100

-

100

-

100

6

Line Regulation/mV

VIN=16V~40V,Full load

-

50

-

20

-

95

7

Load Regulation/mV

No load to full

-

50

-

63

-

95

8

Input current/mA

Inhibited

-

10

-

10

-

10

Io=no load

-

150

-

120

-

160

9

Input Ripple current/mA

BW≤20MHz,Full load

-

200

-

200

-

200

10

Efficiency/%

Full load

Ambient

90

-

90

-

90

-

Low/high

86

-

86

-

88

-

11

Isolation/MΩ

Input to output or any pin to case at 500V,Tc=25℃

100

-

100

-

100

-

12

Inhibit voltage


-

0.3

-

0.3

-

0.3

13

Inhibit open circuit voltage/V

Full load

1.25

4

1.25

4

1.25

4

14

Under voltage turn-on voltage/V

Full load

14.5

15.5

14.5

15.5

14.5

15.5

15

Under voltage cut-off voltage/V

Full load

14

15

14

15

14

15

16

Short Circuit Protection power consumption

-

-

20

-

20

-

20

17

Capacitive

load/μF

Tc=25℃

-

1000

-

1000

-

1000

18

switching frequency/kHz

Full load

250

350

250

350

250

350

19

Step Load Response Transient(mV pK)

50%load→full load or Full load →50% load

-

800

-

500

-

800

20

Step Load Response Recovery(μs)

50%load→full load or Full load →50% load

-

600

-

500

-

800

21

Step Line Response Transient(mV pK)

VIN:16V→40V,

VIN:40V→16V,Io=Full load

-

600

-

500

-

600

22

Step Line Response Recovery(μs)

VIN:16V→40V,

VIN:40V→16V,Io=Full load

-

1500

-

1500

-

2000

23

Start-up Overshoot(mV pK)

VIN:0→28V,

Io=Full load

-

50

-

63

-

95

24

Start-up Delay (ms)

VIN:0→28V,

Io=Full load

-

20

-

20

-

10


Table 3-2 Electric characteristics

No.

Parameter

Conditions

(Unless other wise,-55℃≤Tc≤125℃,VIN=28V±5%)

HOL28S24

HOL28S28

HOL28SXX

Min

Max

Min

Max

Min

Max

1

Input voltage/V

Low、High、Ambient Temperature

16

40

16

40



2

Output voltage/V

Full load

Ambient

23.7

24.3

27.7

28.3



Low/high

23.7

24.3

27.7

28.6



3

Output current/A

VIN=16V~40V

-

5

-

4.2



4

Output Power/W


0

120

-

120



5

Output Ripple Voltage/mV

BW≤20MHz,Full load

-

200

-

200



6

Line Regulation/mV

VIN=16V~40V,Full load

-

240

-

280



7

Lode Regulation/mV

No load to full

-

240

-

280



8

Input current/mA

Inhibited

-

15

-

15



Io=no load

-

80

-

80



9

Input Ripple current/mA

BW≤20MHz,  Full load

-

200

-

200



10

Efficiency/%

Full load

Ambient

87

-

88

-



Low/high

85

-

87

-



11

Isolation/MΩ

Input to output or any pin to case at 500V,Tc=25℃

100

-

100

-



12

Inhibit voltage


-

0.3

-

0.3



13

Inhibit open circuit voltage/V

Full load

1.25

4

1.25

4



14

Under voltage open voltage/V

Full load

14.5

15.5

14.5

15.5



15

Under voltage cut-off voltage/V

Full load

14

15

14

15



16

Short Circuit Protection

-

-

15

-

15



17

Capacitive

load/μF

Tc=25℃

-

200

-

200



18

switching frequency/kHz

Full load

250

350

250

350



19

Step Load Response Transient(mV pK)

50%load→full load or Full load →50% load

-

2000

-

1400



20

Step Load Response Recovery(μs)

50%load→full load or Full load →50% load

-

800

-

800



21

Step Line Response Transient(mV pK)

VIN:16V→40V,

VIN:40V→16V,Io=Full load

-

-

-

-



22

Step Line Response Recovery(μs)

VIN:16V→40V,

VIN:40V→16V,Io=Full load

-

-

-

-



23

Start-up Overshoot(mV pK)

VIN:0→28V,

Io=Full load

-

150

-

150



24

Start-up Delay (ms)

VIN:0→28V,

Io=Full load

-

50

-

20




5. Circuit block diagram of HOL28S Series Hybrid Integrated DC DC Converters


fig-1-hol28s-series-circuit-block-diagram
Fig 1 HOL28S Series circuit block diagram


6.Typical Performance Curves (Testing condition as per Tc=25℃,VIN=28V±5%, Full load, unless otherwise specified)

Fig 2 HOL28S5 Efficiency curves
Fig 2 HOL28S5 Efficiency curves

Fig 3 HOL28S5 Input Step Curve

Fig 4 HOL28S5 Step Load Response


Fig 4 HOL28S5 Step Load Response
Fig 5 HOL28S5 Start-up Overshoot/Start-up Delay

Fig 5 HOL28S5 Start-up Overshoot/Start-up Delay

7. MTBF Curves of HOL28S Series Hybrid Integrated DC to DC Converters


Fig 6 MTBF Temperature Curves(HOL28S5) (Well ground condition)
Fig 6  MTBF Temperature Curves(HOL28S5)

(Well ground condition)


8. Pin Designations of HOL28S Series Hybrid Integrated DC-DC Converters


Figure 7 Pin Out Bottom View
Figure 7 Pin Out Bottom View

Pin Designation

Pin

Symbol

Designation

Pin

Symbol

Designation

1

VI

Positive input

8

Vo

Output

2

GNDI

Input ground

9

GNDO

Output ground

3

TRIM

Trimming

10

SEN-

Negative output sensing

4

INH1

Primary Inhibit

11

SEN+

Positive output sensing

5

NC

NC

12

SHARE

Current flow control terminal

6

SYNI

Synchronous input

13

NC

NC

7

NC

NC

14

NC

NC

Notes:HOL28S5、HOL28S24、HOL28S28(This three models using this package type)


Figure 8 Pin out Bottom View
Figure 8 Pin out Bottom View


Pin Designation

Pin

Symbol

Designation

Pin

Symbol

Designation

1

VI

Positive input

7

Vo

Output

2

GNDI

Input ground

8

GNDO

Output ground

3

TRIM

Trimming

9

SEN-

Negative output sensing

4

INH1

Primary Inhibit

10

SEN+

Positive output sensing

5

NC

NC

11

SHARE

Current flow control terminal

6

SYNI

Synchronous input

12

NC

NC

Notes: Subsequent series of products designed in the form of the package


9. Typical Connection Diagram of HOL28S Series Hybrid Integrated DC to DC Converters


Fig 9 Products Using Connection Diagram
Fig 9  Products Using Connection Diagram


Fig 10 EMI Filter Connection Diagram
Fig 10  EMI Filter Connection Diagram


10. Package Specifications of HOL28S Series Hybrid Integrated DC DC Converters


Fig 11 Bottom View
Fig 11 Bottom View

Table 4  Package Outline

Dimension Symbols

Unit/mm

Minimum

Nominal

Maximum

A

-

-

10.66

A1

0.97

-

1.57

A2

5.29

-

5.89

φb

0.87

-

1.13

D

-

-

64.00

E

-

-

38.60

e

3.7

-

4.3

L

5.35

-

-

φP

3.00


3.60

Y

31.50


32.50

X1

69.60


70.60

X

-

-

76.70

Notes:e is interchangeable size, made by the shell manufacturing and inspection, this specification does not do the assessment requirements.


Table 5  Case Materials

Case Model

Header

Header Plating

Cover

Cover Plating

Pin

Pin Plating

Sealing Style

Notes

fpp6438-14d

Cold Rolled Steel(10#)

Dau-2/Ni4Au1.0

Kovar

(4J42)

Ni

Oxygen-free copper


Parallel seam welding



fig-12-bottom-view
Fig 12 Bottom View

Table 6  Package Outline

Dimension Symbols

Unit/mm

Minimum

Nominal

Maximum

A

-

-

10.66

A1

5.29


5.89

φb

0.87


1.13

D

-

-

76.70

E

-

-

38.60

e

-

5.08

-

L

5.35

-

-

φP

3.00

-

3.60

X1

69.90

70.1

70.3

X2

-

-

64.00

Y1

31.80

32

32.20

Notes:e is interchangeable size, made by the shell manufacturing and inspection, this specification does not do the assessment requirements.



Table 7 Package Outline

Case Model

Header

Header Plating

Cover

Cover Plating

Pin

Pin Plating

Sealing Style

Notes

fpp6438-12d

Cold Rolled Steel(10#)

Dau-2/Ni4Au1.0

Kovar

金(4J42)

Ni

Oxygen-free copper


Parallel seam welding



11. Ordering Information of HOL28S Series Hybrid Integrated DC-DC Converters


Fig 13 Part Numbering Key
Fig 13 Part Numbering Key


Applications 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 root of the pin 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 ordering this device,the detail electrical specification shall be based on relevant standards. While data offered in this document shall be for reference only.



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