ECRI Microelectronics

HNDO5S Non-isolated Point of Load DC to DC Converters (POL)

1 Features of HNDO5S Series Point of Load DC/DC Converters (POL)

High reliability 
Low input voltage:3V~5.5V,Nominal DC input voltage
High conversion efficiency
Output power PO:16.5W
Operating temperature range Tc:-55℃~+125℃ >
Small Starting current
No output overshoot
Inhabit Function
Inhibit function and indefinite short circuit protection
maximum power density:80W/in3
Hermetically sealed metal cases


2.  Scope of application of HNDO5S Series Non-isolated Point of Load DC to DC Converters (POL)

High-reliability electronic system for aviation and aerospace, etc

3. Description of HNDO5S Series Non-isolated Point of Load DC to DC Converters (POL)

This product is a high-reliability, output voltage adjustable non-isolated DC-DC Converters. Products using buck circuit topology, and the pulse width modulation principle, the output voltage is directly sampled feedback pulse width modulation controller,closed-loop control, to meet the requirements of a stable voltage output.By changing the external resistor to achieve the output voltage 0.8V~3.3V adjustable.The series of products using thick-film hybrid integrated production process, metal sealed enclosure package. he design and manufacturing process of HNDO5S Series converters is in compliance with MIL-PRF-38534.

4. Electrical performance of HNDO5S Series Non-isolated Point of Load DC to DC Converters (POL)

Tabel2 Rated conditions and recommended operating conditions

Absolute Max. Rated value

Input voltage:3V~5.5V

Input voltage(Transient,1s):6V

Output Power:18.2W

Storage temperature:-65℃~150℃

Mechanical Shock:1500g

Lead resistance welding temperature:300℃(15s)

Weight:13.5g



Table 3 Electric characteristics

Parameter

Conditions

(Unless otherwise specified,-55℃≤Tc≤125℃,

VIN=5V±0.15V)

HNDO5S3R3

Unit

Q/HW21914-2012

Min

Max

Output voltage

VIN=3V~5.5V,IO=5A

0.8

2.5

V

VIN=4V~5.5V,IO=5A

2.5

3.3

Output current

VIN=3V~5.5V

-

5

A

Output Ripple Voltage/mV

TA=25℃

IO=5A,Vo=3.3V

BW=10kHz~2MHz

-

35

mV

Load Regulation/mV

IO=0→5A,Vo=3.3V

-

40

mV

Efficiency/%

Vo=3.3V,Io=4A

93

-

%

Isolation/MΩ

Input to output or any pin to case(except pin3)at 500V,Tc=25℃

100

-

Inhibitvoltage

TA=25℃,Vo=3.3V,IO=5A

0

0.8

V

Start-up Delay (ms)

VIN:0→5V,Vo=3.3V

-

10

ms

Start-up Overshoot(mV pK)

VIN:0→5V,Vo=3.3V

-

200

mV


5. Circuit block diagram of HNDO5S Series Non-isolated Point of Load DC to DC Converters (POL)

Hybrid Non-isolated DC/DC Converter(HNDO5S Series)
Figure 1 HND05S3R3 Series circuit block diagram

6. Typical Performance Curves of HNDO5S Series Non-isolated Point of Load DC to DC Converters (POL)


Hybrid Non-isolated DC/DC Converter(HNDO5S Series)
Figure 2 HNDO5S3R3 Efficiency

Hybrid Non-isolated DC/DC Converter(HNDO5S Series)

Figure 3 HNDO5S3R3 Load step curve
Hybrid Non-isolated DC/DC Converter(HNDO5S Series)
Figure 4 HNDO5S3R3 Start-up Overshoot/Start-up Delay

7. MTBF Curves of HNDO5S Series Non-isolated Point of Load DC to DC Converters (POL)


Hybrid Non-isolated DC/DC Converter(HNDO5S Series)
Figure 5  MTBF temperature curves(HNDO5S3R3)

8. Pin Designation of HNDO5S Series Non-isolated Point of Load DC to DC Converters (POL)

Hybrid Non-isolated DC/DC Converter(HNDO5S Series)
Figure 6 Pin out Bottom View

Table 4 Pin Designation

Pin

Symbol

Designation

1

NC

NULL

2

VIN

Input

3

GNDC

Case Ground

4

VO

Output

5

GND

Input/output common

6

VTR

Output trimment

7

INH

Inhibit


9. Typical Connection Diagram of HNDO5S Series Non-isolated Point of Load DC to DC Converters (POL)


Hybrid Non-isolated DC/DC Converter(HNDO5S Series)
Figure 7  Products Using Connection Diagram

In figure 7,by adjusting the external resistor Rtr,the output voltage can be realized in different.Correspondence between Rtrand VO are as follows:
Hybrid Non-isolated DC/DC Converter(HNDO5S Series)
Hybrid Non-isolated DC/DC Converter(HNDO5S Series)

Vo(V)

Rtr(kΩ) reference value

3.3

3.3

2.6

6.55

2.5

7.25

0.8

-


Hybrid Non-isolated DC/DC Converter(HNDO5S Series)
Figure 8 Inhibit Diver Diagram
In figure 8,By adjusting the external capacitor circuit start-up delay time may be extended
(C=0.1uF,prolonged delay of about 3ms,there are differences depending on the output)

Hybrid Non-isolated DC/DC Converter(HNDO5S Series)
Figure 9 Recommended connection inputs
In figure 9,Adjusting the capacitance inductance parameter input ripple voltage,
( When L=4.7uH,C1=100uF ,C2=47 uF,Input ripple voltage is 100mV, there are differences depending on the output)

10. Package Specifications (Unit:mm) of HNDO5S Series Non-isolated Point of Load DC to DC Converters (POL)

Hybrid Non-isolated DC/DC Converter(HNDO5S Series)
Hybrid Non-isolated DC/DC Converter(HNDO5S Series)

Figure 10 Bottom View

Figure 11 Side View


Table 5  Package Outline

Dimension Symbols

Unit/mm

Minimum

Nominal

Maximum

A

-

6.86

7.36

Φb1

0.32

0.45

0.58

Φb2

0.87

1

1.13

D

-

25

25.14

E

-

20

20.66

e a

-

5.08

-

e1 a

-

12.70

-

e2 a

-

7.62

-

Z

2.62

2.92

3.22

L

5.40

6.4

-


Table 6  Case Materials

Case Model

Header

Header Plating

Cover

Cover Plating

Pin

Pin Plating

Sealing Style

Notes

UPP2520-07

Cold Rolled Steel(10#)

Ni

Kovar

(4J42)

Ni

Copper Compound

Au

Compression Seal



11. Ordering Information of HNDO5S Series Non-isolated Point of Load DC to DC Converters (POL)

Hybrid Non-isolated DC/DC Converter(HNDO5S Series)


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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