ECRI Microelectronics

MV48B Series Mil-COTS DC DC Converters

1 Features of MV48B Series Mil-COTS DC DC Converters

Input voltage range: 36~75V


Typical voltage: 48V

Output voltage: 3.3V,5V,12V,15V,24V,28V

Input under-voltage lockout

Output over-voltage protection

Fault alarm

Output voltage regulation range: 10%~110%
Logical shutdown function


ZCS/ZVS power structure, PFM control

Can parallel and expand current, 
Accept N+M fault-tolerance model

3000V voltage isolation


2 Scope of application of MV48B Series Mil-COTS DC DC Converters

For military and civil high reliability electronic systems in aviation, aerospace, vessel, armament, radar, railway, etc.

3 Descriptions of MV48B Series Mil-COTS DC DC Converters

MV48B series DC DC converter use ZCS/ZVS soft switching structure with low noise PFM control. The operating frequency can reach 1MHz. The pins can be replacement with similar products of VICOR. These products isolated 3000V voltage. The efficiency is up to 88% and power density is 80W/in3. The features of those products also include input over/under voltage lockout, output over-voltage protection and output over-current protection.
The design and production of products satisfy the requirements of SJ20668-1998and product specifications (Q/HW32230-2013).

4 Technical Specificationss of MV48B Series Mil-COTS DC DC Converters

Table 2: Rated conditions and Operating conditions

Absolute maximum rating

Operating conditions

+In   -In Voltage:-0.5V~53V;

PC    -In Voltage:-0.5V~7.0V;

PR    -In Voltage:-0.5V~7.0V;

SC    -Out Voltage:-0.5V~1.5V;

Storage temperature:-65~125℃

Welding temperature: 390℃ 7S(manual welding)

260℃ 4S(wave soldering)

Input voltage: 36~75V

Working temperature(Tc):-55~100℃


Table 3 electrical characteristics

No.

Character

Symbol

Conditions

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

MV48B3V3M150B

MV48B5M200B

MV48B12M250B

Min

Max

Min

Max

Min

Max

1

Input Transient voltagea/V

VIS

Less 100ms

-

100

-

100

-

100

2

Input under-voltage

turn-on voltage

VINL-ONT


VINL-OFF

TA=25℃

-

35.7

-

35.7

-

35.7


Turn-off voltage

29.4

-

29.4

-

29.4

-

3

Input over turn-off/on voltage

VINL-ON/OFF

TA=25℃

75.7

82.5

75.7

82.5

75.7

82.5

4

Inhibitedinput current/mA

IINH

TA=25℃

-

15.0

-

15.0

-

15.0

5

Bias voltage  for PC port/V

VPC

TA=25℃,IPC=1.0mA

5.50

6.50

5.50

6.50

5.50

6.50

6

Current for PC porta/mA


IPC

TA=25℃,VPC=5.5V

1.5

3.0

1.5

3.0

1.5

3.0

7

Inhibitedfunction  for PC port/mV

VINH-PC

TA=25℃

2.3

2.9

2.3

2.9

2.3

2.9

8

Turn-on delay for PC port

Td(ON)

TA=25℃

-

7

-

7

-

7

9

alarm voltage for PC porta/V

peak/V

VA-PC

TA=25℃

Alarm will be turn on when  input under-voltage or input over voltage

-

6.5

6.5

6.5

period/ms

TPC

1

10

1

10

1

10

pulse/μs

WPC

350

450

350

450

350

450

10

Resistance for PC porta/MΩ

RI-PC

TA=25℃

0.9

1.1

0.9

1.1

0.9

1.1

11

Output voltage amplitude for PR/V

Vout-PR

TA=25℃,PR load over 30Ω,capacitance less 30pF

5.7

6.5

5.7

6.5

5.7

6.5

12

Output current for PR port

Iout-PR

TA=25℃

150

-

150

-

150

-

13

Impedance for PR port inputa/Ω

ZI-PR

TA=25℃

375

625

375

625

375

625

14

Input voltage threshold vale for PR porta/V

VI-PR

TA=25℃,Pulse width≥20ns

2.4

2.6

2.4

2.6

2.4

2.6

15

Drive capabilitya/pc

N

TA=25℃,no buffer amplifier circuit

-

3

-

3

-

3

16

Power distribution precision a/%

PE

TA=25℃,load≥10%

-

5

-

5

-

5

17

SC reference voltage/V

Vb-SC

TA=25℃,relative negative output

1.21

1.25

1.21

1.25

1.21

1.25

18

SC alarm voltagea/V

VA-SC

TA=25℃,SC alarm will be turn on when input under-voltage or output over-voltage()

-

0.5

-

0.5

-

0.5

19

Induct offset voltagea/V

VSC

TA=25℃,each terminal<0.25V(induction terminal is closed)

-

0.5

0.5

0.5

20

Isolation voltage(Ac RMS)/V

VISO

TA=25℃,10s

Between input and output

3000

-

3000

-

3000

-

Between input and baseboard

1500

-

1500

-

1500

-

Between output and baseboard

500

-

500

-

500

-

21

Isolation resistance/MΩ

RISO

TA=25℃,add 500V(DC)between input and output, add 500V(DC)between pin and baseboard

10

-

10

-

10

-

22

Output voltage/V

Vout

TA=25℃,full-load

3.267

3.333

4.95

5.05

11.88

12.12

23

Output current/A

Iout


0

45.45

0

40.0

0

20.83

24

Voltage regulation/%

Sv

18 36, full-load

-

0.20

-

0.20

-

0.20

25

Load regulation/%

Sin

No-load full-load

-

0.20

-

0.30

-

0.20

26

Temperature coefficient/(%/℃)

Av


-

0.005

-

0.005

-

0.005

27

Output voltage regulation range/%

VTR

TA=25℃,load≥10%

10

110

10

110

10

110

28

efficiency/%

η

TA=25℃,full-load

81.0

-

84.0

-


86

29

Ripple voltage and noise voltage (peak-peak value)/mV

VR

BW≤20MHz,full-load

-

100

-

92

-

473

30

Output over-voltage protection point/V

Vovp

TA=25℃


4.14

4.46

6.03

6.47

13.7

14.9

31

Static power/W

PD

No-load

-

5.3

-

6.0

-

6.5

32

Output protection current/A

IImax

Output voltage decline to 95%

46.4

61.5

40.8

52.0

21.3

27.2

33

Short-circuit currenta/A

IS

TA=25℃,Vout<250mV

31.8

63.7

28

56

14.6

26.2


table 3(B) electrical characteristics

No.

Character

Symbol

Conditions

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

MV48B15M250B

MV48B24M250B

MV48B28M250B

Min

Max

Min

Max

Min

Max

1

Input transient voltagea/V

VIS

Less 100ms

-

100

-

100

-

100

2

Input under-voltage /V

turn-on voltage

VINL-ONT


VINL-OFF

TA=25℃

-

35.7

-

35.7

-

35.7

turn-off voltage

29.4

-

29.4

-

29.4

-

3

Input over turn-off/on

VINL-ON/OFF

TA=25℃

75.7

82.5

75.7

82.5

75.7

82.5

4

Inhibitedinput current/mA

IINH

TA=25℃

-

15.0

-

15.0

-

15.0

5

Bias voltage for PC port/V

VPC

TA=25℃,IPC=1.0mA

5.50

6.50

5.50

6.50

5.50

6.50

6

Current for PC porta/mA


IPC

TA=25℃,VPC=5.5V

1.5

3.0

1.5

3.0

1.5

3.0

7

Inhibitedfunction  for PC port/mV

VINH-PC

TA=25℃

2.3

2.9

2.3

2.9

2.3

2.9

8

Turn-on delay for PC porta/ms

Td(ON)

TA=25℃

-

7

-

7

-

7

9

alarm voltage for PC porta/V

peak/V

VA-PC

TA=25℃

Alarm will be turn on when  input under-voltage or input over voltage

-

6.5

6.5

6.5

period/ms

TPC

1

10

1

10

1

10

pulse/μs

WPC

350

450

350

450

350

450

10

Resistance for PC porta/MΩ

RI-PC

TA=25℃

0.9

1.1

0.9

1.1

0.9

1.1

11

Output voltage amplitude for PR/V

Vout-PR

TA=25℃,PR load over 30Ω,capacitance less 30pF

5.7

6.5

5.7

6.5

5.7

6.5

12

Output current for PR port

Iout-PR

TA=25℃

150

-

150

-

150

-

13

Impedance for PR port inputa/Ω

ZI-PR

TA=25℃

375

625

375

625

375

625

14

Input voltage threshold vale for PR porta/V

VI-PR

TA=25℃,Pulse width≥20ns

2.4

2.6

2.4

2.6

2.4

2.6

15

Drive capabilitya/pc

N

TA=25℃,no buffer amplifier circuit

-

3

-

3

-

3

16

Power distribution precision a/%

PE

TA=25℃,load≥10%

-

5

-

5

-

5

17

SC reference voltage/V

Vb-SC

TA=25℃,relative negative output

1.21

1.25

1.21

1.25

1.21

1.25

18

SC alarm voltagea/V

VA-SC

TA=25℃,SC alarm will be turn on when input under-voltage or output over-voltage()

-

0.5

-

0.5

-

0.5

19

Induct offset voltagea/V

VSC

TA=25℃,each terminal<0.25V(induction terminal is closed)

-

0.5

0.5

0.5

20

Isolation voltage(Ac RMS)/V

VISO

TA=25℃,10s

Between input and output

3000

-

3000

-

3000

-

Between input and baseboard

1500

-

1500

-

1500

-

Between output and baseboard

500

-

500

-

500

-

21

Isolation resistance/MΩ

RISO

TA=25℃,add 500V(DC)between input and output, add 500V(DC)between pin and baseboard

10

-

10

-

10

-

22

Output voltage

Vout

TA=25℃,full-load

14.85

15.15

23.76

24.24

27.72

28.28

23

Output current

Iout


0

16.67

0

10.42

0

8.93

24

Voltage regulation/%

Sv

18 36, full-load

-

0.20

-

0.20

-

0.20

25

Load regulation/%

Sin

No-load full-load

-

0.20

-

0.20

-

0.20

26

Temperature coefficient/(%/℃)

Av


-

0.005

-

0.005

-

0.005

27

Output voltage regulation range/%

VTR

TA=25℃,load≥10%

10

110

10

110

10

110

28

efficiency/%

η

TA=25℃,full-load

87.5

-

88

-

88.5

-

29

Ripple voltage and noise voltage (peak-peak value)/mV

VR

BW≤20MHz,full-load

-

200

-

275

-

223

30

Output over-voltage protection point/V

Vovp

TA=25℃


17.1

18.5

27.1

29.1

31.5

33.9

31

Static power/W

PD

No-load

-

7.9

-

7.5

-

8.7

32

Output protection current/A

IImax

Output voltage decline to 95%

17.0

21.8

10.7

13.7

9.1

12.1

33

Short-circuit currenta/A

IS

TA=25℃,Vout<250mV

11.6

21.8

7.35

13.7

5

12.1

a design guarantee, test only be needed when identified inspection or parameters are effected by changing process

5 Circuit block diagram of MV48B Series Mil-COTS DC DC Converter

DC/DC Converter (MV48B Series)-2

6. Typical Characteristic Curve of MV48B Series Mil-COTS DC DC Converter

DC/DC Converter (MV48B Series)-3
Diagram 3  Efficiency(Output power)
(MV48B28M250B model)

7 MTBF Curve of MV48B Series Mil-COTS DC DC Converter


DC/DC Converter (MV48B Series)-4

Diagram 4   MTBF Curve
(Predicting the ground is in good condition, this diagram correspond to MV48B15M250B model)

8 Pin Designation of MV48B Series Mil-COTS DC DC Converter


DC/DC Converter (MV48B Series)-5

Figure 5 Pin Out Bottom View

Table 4 Pin Designation

Pin

Symbol

Designation

1

+In

Positive Input

2

PC

Prohibit/Alarm

3

PR

Parallel

4

- In

Negative Input

5

- Out

Negative Output

6

- Sence

Negative Induction

7

SC

Secondary Side Control

8

+ Sence

Positive Induction

9

+Out

Positive Output

9 Typical Connection Diagram of MV48B Series Mil-COTS DC DC Converter

(1)Electrical test circuit connection diagram (diagram6)
DC/DC Converter (MV48B Series)-6
Diagram 6: Electrical test circuit connection diagram

(2)PC Prohibit and Fault Alarm (Diagram 7~9)
PC port is bi-directional port, which has module enabled function and Fault indicate function.
DC/DC Converter (MV48B Series)-7
DC/DC Converter (MV48B Series)-8

Diagram 7: module enabled

Diagram 8: Status indicate and Fault indicate


The output will be inhibited when (-In) of PC port less 2.3V, the repetition frequency of this pin should is more than 1s
LED indicator is lighted when the module is in normal operation; the indicator is flickering when over-voltage or under-voltage happened. PC port will output signal as diagram 9 when a failure happens.
DC/DC Converter (MV48B Series)-9
Diagram 9: Fault signal
(3)Parallel function(N+M)
Realized the paralleling and expanding current function by connected with PR ports of modules, at the same time, the fault-tolerant function is also accepted. There are two methods to realize paralleling and expanding current function, one is the automatic master-slave mode (Diagram 10) and another one is the master-slave mode (diagram 11).Under master-slave mode, the output voltage of paralleling can be adjustable by SC port of master module in accept area.  Even thought both of these two methods can expand output power, the method of diagram 10 is better for system redundancy. The method of diagram 11 is better for the area in large electromagnetic interference. It must be pointed that, the cell array may be crushed by master module disabled.
DC/DC Converter (MV48B Series)-10
Diagram 10: Paralleling and expanding current
DC/DC Converter (MV48B Series)-11
Diagram 11: Paralleling and expanding current (master-slave)
(4)Output Voltage Regulation
Connected as diagram 12, the value of output voltage and resistance RW1 are decided by the formula below
DC/DC Converter (MV48B Series)-12
DC/DC Converter (MV48B Series)-13
Diagram 12: Output voltage positive adjustment

Connected as diagram 13, the value of output voltage and resistance RW2 are decided by the formula below
DC/DC Converter (MV48B Series)-14
DC/DC Converter (MV48B Series)-15
Diagram 13: Output voltage negative adjustment

10. Package Specifications of MV48B Series Mil-COTS DC DC Converter

DC/DC Converter (MV48B Series)-16
Diagram 14: Package outline drawing (upward view)

Table 5  Package Outline

Symbols

Unit/mm

Minimum

Typical

Maximum

A

12.20

-

13.20

A1

2.80

-

3.30

A2

10.65

-

11.40

Φb1

3.68

-

3.94

Φb2

1.90

-

2.16

D

57.52

-

58.28

E

43.95

-

44.95

e2

-

17.78

-

e3

-

7.62

-

e1

-

48.26

-

L

Long leg

4.58

-

-

Short leg

2.55

-

-

X1

16.26

-

16.76

Y1

50.55

-

51.05

d

3.17

-

3.55

Y

55.65

-

56.15



11 Ordering Information of MV48B Series Mil-COTS DC DC Converter

DC/DC Converter (MV48B Series)-17
Diagram 15: Ordering Information


Application Notes:


  • 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.
  • Unused pins shall be hung in the air during no operation.
  • Pins at inhibit terminal shall be hung in the air during no operation.
  • PC and PR can not connect with +In and –In, SC can not directly connect with +Vout. Otherwise, the product may be damaged.
  • When ordering this device,the detailed electrical specifications s
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