ECRI Microelectronics

Full Brick 270V Normal Input Series Mil-COTS DC DC Converters

1 Features of Full Brick 270V Normal Input Series Mil-COTS DC DC Converters

Input voltage range: 200~400V

Typical input direct voltage: 270

Output voltage: 12V

Output power: 750W

Output voltage regulation range: -20%~10% 

Input under-voltage protection

Output over-current/over-voltage protection

Working temperature(TC):-55~100℃

Fix-frequency PWM control method  

Standard-brick size

Pins function: compatibility with similar products of SynQor 

2 Scope of application of Full Brick 270V Normal Input Series Mil-COTS DC DC Converters

For high reliability electronic systems in aviation, aerospace, etc.


3 Descriptions of Full Brick 270V Normal Input Series Mil-COTS DC DC Converters

MI-270N series DC-DC converters use two stages circuit topology, the first stage is voltage regulation stage, the second stage is input-output isolation stage. Output voltage produce error amplifying signal by error amplifier. This signal is use for control the duty ratio of PWM waveform thus controlling the output voltage of the whole module.
These series products has module circuits structure with surface mounted technology, inside the products, using conductivity material for embedding and aluminum baseboard for cooling. The products' outlines are compatible with similar products' of SynQor, and their pins can be replacement.


4 Technical Specifications of Full Brick 270V Normal Input Series Mil-COTS DC DC Converters

Table 2: Rated conditions and Operating conditions

Absolute maximum rating

Operating conditions

Input Voltage: 425V

Output Power: 825W

Storage temperature: -65~135℃

Lead welding temperature(10s): 300℃

Junction Temperature:<150℃

Input voltage: 200~400V

Working temperature(Tc):-55~100℃

table 3a electrical characteristics(MI-270H-12-FP-N-M-F)

No.

Character

Symbol

Conditions

( Unless otherwise specified,-55℃≤Tc≤125℃,VIN=270V)

Limit value

Unit

min

max

1

Input under-voltage/V

turn-on voltage

VINL-ONT


VINL-OFF

TA=25℃

185

195

V

Turn-off voltage

TA=25℃

170

180

V

2

Output Voltage

Vo

Full-load

TA=25℃

11.88

12.12

V

Tc=-55℃

TC=100℃

11.8

12.2

3

Output Current

Io

Vin=200V~400V

-

62.5

A

4

Voltage regulation

Sv

200V  400V, Full-load

TA=25℃、 Tc=-55℃ and TC=100℃

-

±0.20

%

5

Load regulation

S1

No-load Full-load

TA=25℃、 Tc=-55℃ andTC=100℃

-

±0.50

%

6

Output voltage regulation range

VTR

TA=25℃,Full-load

-20

10

%

7

Output ripple voltage

VPP

BW≤20MHz, full-load, peak-peak

TA=25℃、 Tc=-55℃ and TC=100℃

-

200

mV

8

Output over-voltage protection point

VOVP

TA=25℃,design guarantee

13.2

15.6

V

9

Output current for over-current protection

Iimax

TA=25℃

69

81

A

10

efficiency

η

Vin=270V,full load, TA=25℃

92

-

%

a test only be needed when identified inspection or parameters are effected by changing process; b  design guarantee, do not require test


table 3b function characteristics(MI-270H-12-FP-N-M-F)

characteristics

conditions

( Unless otherwise specified ,-55℃≤Tc≤125℃,VIN=270V±10V)

criteria

Using function

ON/OFF voltage is over 2.4V, TA=25℃

No output

ON/OFF voltage is lower than 0.7V or hung in the air, TA=25℃

Normal Output

5 Circuit block Fig of Full Brick 270V Normal Input Series Mil-COTS DC DC Converters

full-brick-270v-normal-input-series-1
Fig 2 Product schematic Fig

6 Typical Characteristic Curve of Full Brick 270V Normal Input Series Mil-COTS DC DC Converters

full-brick-270v-normal-input-series-2
Fig 3  Efficiency(Output power)

7.MTBF Curve of Full Brick 270V Normal Input Series Mil-COTS DC DC Converters

full-brick-270v-normal-input-series-3
Fig 4   MTBF Curve
(Predicting the ground is in good condition)

8 Pin Designation of Full Brick 270V Normal Input Series Mil-COTS DC DC Converters

full-brick-270v-normal-input-series-4
Figure 5 Pin Out Bottom View
Table 4 MI-270-05-FT-N-M-FB Pin Designation

Pin

Symbol

Designation

1

SyncIn

Synchronizing signal Input

2

SyncOut

Synchronizing signal Output

3

ON/OFF(+)

Positive Enabling(relative to ON/OFF(-))

4

ON/OFF(-)

Negative Enabling(isolation common)

5

Vin(+)

Positive Input

6

Vin(-)

Negative Input

7

Vaux

Auxiliary power output(relative to output common)

8

Start Sync

Synchronizing signal start


9

I Share

Paralleled current sharing Signal

10

TRIM

Output voltage regulation



11

SENSE(+)

Positive Output Induction

12

SENSE(-)

Negative Output Induction

13

Vout(-)

Negative Output

14

Vout(-)

Negative Output

15

Vout(-)

Negative Output

16

Vout(+)

Positive Output

17

Vout(+)

Positive Output

18

Vout(+)

Positive Output

9 Typical Connection Fig of Full Brick 270V Normal Input Series Mil-COTS DC DC Converters

full-brick-270v-normal-input-series-5
Fig 6:  Electrical testing connection Fig

10. Package Specifications of Full Brick 270V Normal Input Series Mil-COTS DC DC Converters

full-brick-270v-normal-input-series-6
Fig 7: Package outline drawing

Table 4  Package Outline

Symbols

mm  Unit/mm

Minimum

Typical

Maximum

A

-

-

119.52

B

-

-

63.64

C

-

-

13.05

e1

-

6.35

-

e2

-

3.81

-

e3

-

10.16

-

e4

-

1.27

-

e5

-

45.72

-

e6

-

80.01

-

Φb1

0.90

-

1.10

Φb2

1.80

-

2.20

P

-

106.70

-

Q

-

50.80

-

L

3.00

-

-

Mb

-

2.5

-


11 Ordering Information of Full Brick 270V Normal Input Series Mil-COTS DC DC Converters

full-brick-270v-normal-input-series-7
Fig 8: Ordering Information


Application Notes:


  • The influence of external disturbance on the test accuracy should be avoided.
  • The voltage detection point should be kept at the root of the pin of the testing product.
  • Do not plug the product with electricity.
  • Before power the testing product, you must confirm the polarity of the power supply to avoid damaging products by misconnection. At the same time, please ensure that the power supply voltage and load current does not exceed using limitation of the testing product.
  • Package temperature can not exceed the specified temperature in use, otherwise the heat sink should be needed.
  • When ordering this device,the detailed electrical specifications shall be based on relevant standards.


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