ECRI Microelectronics

HOL28D Series Thick Film DC-DC Converters

1. Features of HOL28D Series Thick Film  DC-DC Converter

High reliability features
Input voltage range:16V~40V,Typical DC input voltage :28V
Output power PO:100W~150W
Operating temperature range Tc:-55℃~+125℃ Low Start-up current
No output overshoot
Inhibit function
under-voltage and over-voltage lock
Output short circuit and over-current protection
Output voltage fine tunable
Output sensing function
Maximum power density:100W/in3
Efficiency 90%
Hermetically sealed metal cases


2. Scope of application of HOL28D Series Thick Film DC-DC Converter

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


3. Description of HOL28D Series Thick Film  DC-DC Converter

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 optocoupler 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 HOL28D Series Thick Film  DC-DC Converter


Tabel2 Rated conditions and recommended operating conditions

Absolute Max. Rated value

Output voltage:15.5V~41V

Output power:150W

Storage temperature:-65℃~150℃

Mechanical Shock:1500g

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

Weight:100g

ESD:2000V



Table 3-1 Electric characteristics

No.

Parameter

Conditions

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

HOL28D9R5

HOL28D12

HOL28D15

Min

Max

Min

Max

Min

Max

1

Input voltage/V

Low、High、Ambient Temperature

16

40

16

40

16

40

2

Output voltage/V

Positive

Ambient, Full load

9.31

9.69

11.80

12.2

14.70

15.30

Negative

-9.69

-9.31

-12.20

-11.80

-15.30

-14.70

Positive

Low/high, Full load

9.31

9.69

11.80

12.20

14.70

15.30

Negative

-9.69

-9.31

-12.20

-11.80

-15.30

-14.70

3

Output current/A

VIN=15V~50V

6.3

5

5

4

Output Power/W


120

120

150

5

Output Ripple Voltage/mV

BW≤20MHz,Full load

100

120

150

6

Line Regulation/mV

Positive

VIN=16V~40V,Full load

95

120

150

Negative

95

120

150

7

Load Regulation/mV

Positive

No load to full

95

120

150

Negative

95

120

150

8

Input current/mA

Inhibited

10

10

10

Io=no load

100

100

100

9

Input Ripple current/mA

BW≤20MHz,Full load

200

200

200

10

Efficiency/%

Full load

Ambient

89

-

88

90

Low/high

86

86

86

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


-

15

-

15

-

15

17

Capacitive

load/μF

Tc=25℃

500

500

500

18

Switching frequency/kHz

Full load

250

350

250

350

250

350

19

Cross regulation/mV

One side 30% load, the other from 30% to 70% load

380

480

600

20

Step Load Response Transient(mV pK)

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

800

800

800

21

Step Load Response Recovery(μs)

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

800

600

600

22

Step Line Response Transient(mV pK)

VIN:16V→40V,

VIN:40V→16V,Io=Full load

1200

1200

1200

23

Step Line Response Recovery(μs)

VIN:16V→40V,

VIN:40V→16V,Io=Full load

1500

1500

1500

24

Start-up Overshoot(mV pK)

VIN:0→28V,

Io=Full load

25

25

25

25

Start-up Delay (ms)

VIN:0→28V,

Io=Full load

30

20

20


Table 3-2 Electric characteristics

No.

Parameter

Conditions

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

HOL28D16R5

HOL28DXX

HOL28DXX

Min

Max

Min

Max

Min

Max

1

Input voltage/V

Low、High、Ambient Temperature

20

36





2

Output voltage/V

Positive

16.25

-16.75

16.25

16.25





Negative

-16.75

-16.75





Positive

16.25

-16.75

16.25

16.25





Negative

-16.75

-16.75





3

Output current/A


3.5





4

Output Power/W


115





5

Output Ripple Voltage/mV

BW≤20MHz,Full load

150





6

Line Regulation/mV

Positive

VIN=16V~40V,Full load

165





Negative

165





7

Lode Regulation/mV

Positive

No load to full

165





Negative

165





8

Input current/mA

Inhibited

10





Io=no load

100





9

Input Ripple current/mA

BW≤20MHz,Full load

200





10

Efficiency/%

Full load


87

-






86

-





11

Isolation/MΩ

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

100

-





12

Inhibit voltage


0

0.7





13

Inhibit open circuit voltage/V

Full load

1.25

4.0





14

Under voltage open voltage/V

Full load

18

19.5





15

Under voltage cut-off voltage/V

Full load

17

19





16

Short Circuit Protection


15





17

Capacitive

load/μF

Tc=25℃

330





18

Switching frequency/kHz

Full load

250

350





19

Cross regulation/mV

One side 30% load, the other from 30% to 70% load

800





20

Step Load Response Transient(mV pK)

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

800





21

Step Load Response Recovery(μs)

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

600





22

Step Line Response Transient(mV pK)

VIN:16V→40V,

VIN:40V→16V,Io=Full load

1200





23

Step Line Response Recovery(μs)

VIN:16V→40V,

VIN:40V→16V,Io=Full load

1500





24

Start-up Overshoot(mV pK)

VIN:0→28V,

Io=Full load

150





25

Start-up Delay (ms)

VIN:0→28V,

Io=Full load

50





5. Circuit block diagram of HOL28D Series Thick Film DC to DC Converter




Fig 1 HOL28D Series circuit block diagram


6. Typical Performance Curves  of HOL28D Series Thick Film DC to DC Converter(Testing condition as per Tc=25℃,VIN=28V±5%, Full load, unless otherwise specified)


Fig 2 HOL28D15 Efficiency curves
Fig 2  HOL28D15 Efficiency curves

Fig 3 HOL28D15Input Step Curve
Fig 3 HOL28D15Input Step Curve
Fig 3 HOL28D15Input Step Curve


Fig 4 HOL28D15 Step Load Response(Positive output)

Fig 5 HOL28D15 Start-up Overshoot/Start-up Delay


Fig 5 HOL28D15 Start-up Overshoot/Start-up Delay

7 MTBF Curves of HOL28D Series Thick Film  DC to DC Converter



fig-6--mtbf-temperature-curveshol28d15
Fig 6  MTBF Temperature Curves(HOL28D15)


(Well ground condition)


8 Pin Designations of HOL28D Series Thick Film  DC-DC Converter


Fig 7 Pin Out Bottom View
Fig 7 Pin Out Bottom View

Pin Designation

Pin

Symbol

Designation

Pin

Symbol

Designation

1

VIN

Positive input

8

Vo+

Positive output

2

GNDI

Input ground

9

COM

Common

3

NC

NC

10

Vo-

Negative output

4

INH1

Primary Inhibit

11

Trim

Trimming

5

NC

NC

12

SHARE

Current flow control terminal

6

SYNI

Synchronous input

13

NC

NC

7

NC

NC

14

NC

NC

Notes:HOL28D15、HOL28D16R5(This two models using this package type)


Fig 8 Pin out Bottom View
Fig 8 Pin out Bottom View

Pin Designation

Pin

Symbol

Designation

Pin

Symbol

Designation

1

VIN

Positive input

7

Vo+

Positive output

2

GNDI

Input ground

8

COM

Common

3

NC

NC

9

Vo-

Negative output

4

INH1

Primary Inhibit

10

Trim

Trimming

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 HOL28D Series Thick Film DC DC Converter


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 HOL28D Series Thick Film DC DC Converter


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

-

4.00

-

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

(4J42)

Ni

Oxygen-free copper


Parallel seam welding



11. Ordering information of HOL28D Series Thick Film Hybrid Large Power DC-DC Converter



Fig 13 Part Numbering Key
Fig 13 Part Numbering Key
Fig 13 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 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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