ECRI Microelectronics

HNTF5S Military Point of Load DC to DC converters (POL)

1 Features of HNTF5S Point of Load DC/DC Converters (POL)

High reliability

Low voltage input:4.5V~5.5V,Typical 5V
High conversion efficiency
Output Power PO:33W
Operating temperature Tc:-55℃~+125℃ 
Low start-up current
No output overshoot  
Inhibit function
Output over current and short circuit protection
Maximum power density:63W/in3
Hermetically sealed metal case


2 Scope of application of HNTF5S Military Point of Load DC to DC converter (POL)

High-reliability electronic system for ground,vehicle,radar, aviation and aerospace, etc

3 Description of HNTF5S Military Point of Load DC to DC converter (POL)

HNTF5S series is a high reliable, output voltage adjustable non-isolated DC to DC converter with BUCK circuit topology and pulse width modulation principle. The output sampling voltage is directly feedbacked to modulate the pulse width to achieve closed-loop control to meet the stability of the voltage output requirements. The series of products are made by thick-film hybrid integrated production process, metal sealed package. The design and manufacturing process of HNTF5S Series converters are in compliance with MIL-PRF-38534.

4 Technical Specifications of HNTF5S Military Point of Load DC to DC converter (POL)

Table 2 Rated conditions and recommended operating conditions

Absolute Max. Rating

Input voltage:4.5V~5.5V

Input voltage(Transient,1s):6V

Output Power:36.3W

Storage temperature:-65℃~150℃

Mechanical Shock:1500g

Lead solderable temperature:300℃(15s)

Weight(Without flange/flanged):31g/34g



Table 3 Electrical characteristics

NO.

Items

Conditions

(Unless other wise,

-55℃≤Tc≤125℃,

VIN=5V±0.15V)

HNTF5S3R3

HNTF5S3R3F

Min

Max

1

Input voltage /V

Low、high and room temperature

4.5

5.5

2

Output voltage /V

Full load

Room temperature

3.1

3.5

Low and High temperature

2.9

3.7

3

Output current /A

VIN=4.5V~5.5V

10

4

Output power /W


0

33

5

Output ripple voltage /mV

BW=6MHz,Full load

35

6

Voltage regulation /mV

VIN=4.5V~5.5V,Full load

Room temperature

30

Low and High temperature

80

7

Load regulation /mV

0→full load

Room temperature

50

Low and High temperature

100

8

Efficiency /%

Full load

Room temperature

88

Low and High temperature

86

9

Insulation resistance/MΩ

TA=25℃,impose 500V DC voltage between case and any pin

100

10

Inhibit shut-down voltage /V

Full load

0

0.2

11

Start-up Overshoot(peak)/mV

Input voltageVIN:0→5V,Full load

500

12

Start-up Delay /ms

Input voltage VIN:0→5V,Full load

100


5 Circuit block diagram of HNTF5S Military Point of Load DC to DC converter (POL)

fig-2-hntf5s-circuit-block-diagram
Fig 2 HNTF5S Circuit block diagram


6 Typical Characteristic Curve (Unless otherwise specified,Testing condition as per Tc=25℃,VIN=5V±0.15V, Vo=3.3V,full load.) of HNTF5S Military Point of Load DC to DC converter (POL)

fig-3-hntf5s3r3-efficiency
Fig 3 HNTF5S3R3 Efficiency
fig-4-hntf5s3r3-load
Fig 4 HNTF5S3R3 Load
fig-5-hntf5s3r3-overshoot-start-up-delay
Fig 5 HNTF5S3R3 Overshoot/Start-up Delay

7 MTBF Curve of HNTF5S Military Point of Load DC to DC converter (POL)

fig-6-mtbf-temperature-curve
Fig 6  MTBF Temperature Curve(HNTF5S3R3)
(Ground good condition is expected)


8 Pin Designations of HNTF5S Military Point of Load DC to DC converter (POL)


Figure 7 Bottom View

Table 4 Pin Designation

Pin

Symbol

Designation

Pin

Symbol

Designation

1

INH

Inhibit

5

NC

NC

2

V0

Outptu

6

GNDC

Case ground

3

GND

Common Ground

7

GND

Common Ground

4

NC

NC

8

VIN

Positive input



9 Typical Connection Diagram of HNTF5S Military Point of Load DC to DC converter (POL)

fig-8-connection-diagram
Fig 8  Connection Diagram

fig-9-inhibit-drive-circuit

Fig 9 Inhibit drive circuit


10.Package Specifications of HNTF5S Military Point of Load DC to DC converter (POL)

① Without flange

Fig 10 Bottom View                         Fig 11 Side View
② With flange

Fig 12  Bottom View                     Fig 13 Side View
Table 5  Package Outline

Symbols

Unit/mm

Minimum

Nominal

Maximum

A

-

-

8.90

A1

1.20

1.50

1.80

φb

0.87

1.00

1.13

D

-

-

28.94

E

-

-

37.33

e

-

20.32

-

e1

-

5.21

-

e2

-

12.83

-

e3

-

17.91

-

e4


22.99


e5

-

28.07

-

X

-

-

51.30

X1

43.45

43.95

44.45

P

3.00

3.30

3.60

L

5.35

-

-


Table 6  Case Materials

Case Model

Header

Header Plating

Cover

Cover Plating

Pin

Pin Plating

Sealing

Notes

UPP3728-08b

Cold Rolled Steel

(10#)

Ni

Kovar (4J42)

Ni

Copper –core Compound

Au

Parallel seam welding


UPP3728-08e

Cold Rolled Steel

(10#)

Ni

Kovar (4J42)

Ni

Copper –core Compound

Au

Parallel seam welding




11 Ordering Information of HNTF5S Military Point of Load DC to DC converter (POL)

fig-14-part-numbering-key-2
fig-14-part-numbering-key-2

Fig 14  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.
☆  Eletrical performance test, the common use of pin 7, pin 3 only as a test useful.
☆  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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