ULT-12/2.5-D48P-C_技术文档

ULT Series

www.murata-ps.com

Thirty-Second-Brick Isolated DC/DC Converters

with 2:1 Wide Input Range

FEATURES



2:1 Input Voltage Range (36V – 75V, 48 Volts,

Typical units

nominal)



Up to 30W output power @ 36 – 48 – 75Vin



89% efﬁciency (typical, 5Vout)

PRODUCT OVERVIEW



Through-hole and optional SMT package



The ULT Series isolated DC/DC converter repre-

sents the next generation converters in a 1/32

brick package. This converter is the “industry-

standard” 1/32 brick form factor (0.92" x 0.75"

x 0.35"). The product fully complies with RoHS-6

directive.

The thirty-second brick is offered as an open

frame module; mounting options include through-

hole or surface mount (SMT) pinouts. Typical

applications include Optical Networking Equipment,

Wireless Base Station applications, Microwave

Radio communications, and Telecom and Data

Equipment applications.

Modules will supply an output power of up to

30 watts over the input range of 36-75V. The ULT

Series also provides a cost effective approach to

highly efﬁcient systems requiring 12V, 5V, and 3.3V

voltages, eliminating the requirement for a “Bus

Converter” and multiple PoL converters. The ULT

family provides basic insulation with 1500Vdc iso-

lation meeting the requirements of UL/IEC 60950.

The ULT series modules are DOSA compatible

industry standard 1/32 brick.

Miniature 1/32 brick open frame package



Positive & Negative Logic On/Off control option



Over-current & Over-temperature protection



Low output ripple and noise



Strong thermal derating characteristics



Operational Temperature Range –40°C to +85°C



1500V I/O isolation



Tight line/load regulation



Certiﬁed to UL/IEC 60950-1, CAN/CSA C22.2 No.

60950-1, safety approvals, 2nd Edition

*TPMBUJPO

F1

+Vin (1)

+Vout (8)

Barrier

tꢀ4XJUDIJOH

tꢀ'JMUFST

ꢁ4FOTFꢀꢂꢃꢄ

External

DC

Power

Source

On/Off

Control

(2)

Controller

and Power

5SBOTGFS

tꢀ$VSSFOUꢀ4FOTF

ꢅ4FOTFꢀꢂꢆꢄ

Trim (6)

Open = On

$MPTFEꢀꢇꢀ0GG

ꢂ1PTJUJWFꢀ

polarity)

Reference and

Error Ampliﬁer

-Vin (3)

-Vout (4)

Figure 1. Connection Diagram

Typical topology is shown. Murata Power

Solutions recommends an external fuse.

For full details go to

www.murata-ps.com/rohs

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MDC_ULT Series.F05 Page 1 of 26

ULT Series

Thirty-Second-Brick Isolated DC/DC Converters

with 2:1 Wide Input Range



PERFORMANCE SPECIFICATIONS SUMMARY AND ORDERING GUIDE

Output

Input

Efficiency

Package



R/N (mV pk-pk)  Regulation (max.)

Root Model 

V^OUT

(V) (A, max.)

IOUT

Power

(W)

VIN Nom. Range IIN, no load

IIN, full

load (A)

(V)

(mA)

Typ.

45

Max.

50

Line

Load

Min.

84%

87%

90%

Typ.

Case (inches)

ULT-3.3/7.5-D48

ULT-5/5-D48

3.3

5

7.5

5

24.75

25

0.15%

0.1%

0.2%

48

36-75

20

0.6

85.5% 0.92 x 0.75 x 0.35

50

75

0.125%

0.59

0.68

89%

92%

0.92 x 0.75 x 0.35

ULT-12/2.5-D48

12

2.5

30

70

100

0.075%



Please refer to the Part Number Structure when ordering.

is measured with 188μF. Output caps are necessary for our test equipment and may

not be needed for your application.

Regulation speciﬁcations describe output voltage deviations from a nominal/midpoint

value to either extreme (50% load step).



All speciﬁcations are typical at nominal line voltage and full load, +25°C unless

otherwise noted. See detailed speciﬁcations. External input capacitors are

33μF electrolytic and three 1μF ceramic. Output ripple is measured with 400μF

capacitance across output pins for the 3.3Vout and 5Vout model. The 12Vout model



PART NUMBER STRUCTURE

ULT - 3.3 / 7.5 - D48 N M Lx - C

Thirty-second-brick series (Unipolar)

RoHS Hazardous Substance Compliance

(does not claim EU RoHS exemption 7b–lead in solder)

C = RoHS-6

Pin Length Option (Thru-hole only)

Blank = Standard pin length 0.190˝ (4.8mm)

Nominal Output Voltage

L1 = 0.110˝ (2.79mm) ➀

L2 = 0.145˝ (3.68mm) ➀

SMT Version Option

Blank = Through-hole mount, no SMT

Maximum Rated Output Current

Current in Amps

M = Surface mount (MSL Rating 2) ➁

Input Voltage Range

D48 = 36-75 Volts (48V nominal)

On/Off Control Logic Option

N = Negative

P = Positive

➀ Special quantity order is required; samples available with standard pin length only.

➁ SMT (M) versions not available in sample quantities.

➂ Some model number combinations may not be available. See website or contact your local Murata sales representative.

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MDC_ULT Series.F05 Page 2 of 26

ULT Series

Thirty-Second-Brick Isolated DC/DC Converters

with 2:1 Wide Input Range

FUNCTIONAL SPECIFICATIONS (ULT-3.3/7.5-D48-C)

ABSOLUTE MAXIMUM RATINGS

Input Voltage, Continuous

Minimum

Typical/Nominal

Maximum

Units

Vdc

Conditions ➀

Full temperature range

36

80

Operating or non-operating, 100 mS max.

duration

15

100

Vdc

Input Voltage, Transient

Isolation Voltage

Input to output tested

None, install external fuse

Power on or off, referred to -Vin

1500

Vdc

W

Input Reverse Polarity

On/Off Remote Control

Output Power

none

15

25

Output Current

Storage Temperature Range

Current-limited, no damage, short-circuit protected

Vin = Zero (no power)

7.5

125

A

°C

-40

Absolute maximums are stress ratings. Exposure of devices to greater than any of these conditions may adversely affect long-term reliability. Proper operation under conditions other than those

listed in the Performance/Functional Speciﬁcations Table is not implied or recommended.

INPUT

Conditions ➀ ➂

Operating voltage range

36

48

2

33.3

31.75

1.3

N/A

75

Vdc

A

13

Fast blow

Rising input voltage

Falling input voltage

Recommended External Fuse

Start-up threshold

32.5

30.75

1.22

34.5

32.75

1.32

Vdc

11

Undervoltage lockout (@ ½ load)

Turn-On/Turn-Off Hysteresis

Overvoltage shutdown

Reverse Polarity Protection

Internal Filter Type

Rising input voltage

None, install external fuse

None

Capacitive

Input current

Full Load Current Conditions

Low Line Input Currrent

Inrush Transient

Short Circuit input current

No Load input current

Vin = nominal

Vin = minimum

Vin = 48V

0.6

0.8

0.05

0.04

20

0.62

0.83

A

A2-Sec.

mA

0.1

40

10

Iout = minimum, unit=ON

Shut-Down Mode input current (Off, UV, OT)

6

mA

Measured at input with speciﬁed ﬁlter

30

mA, pk-pk

Reﬂected (back) ripple current ➁

GENERAL and SAFETY

Vin=48V

Vin=36V

84

83.5

85.5

%

Efﬁciency

Isolation

Isolation Voltage, Input to Output

Insulation Safety Rating

Isolation Resistance

Isolation Capacitance

Safety

1500

basic

Vdc

10

MΩ

pF

1700

Yes

UL-60950-1, CSA-C22.2 No.60950-1,

IEC/60950-1, 2nd edition

(certiﬁed to the following requirements)

Per Telcordia SR332, issue 1, class 3, ground

ﬁxed, Tambient=+25°C

TBD

287

Hours x 10³

Calculated MTBF ➃

DYNAMIC CHARACTERISTICS

Fixed Switching Frequency

Startup Time

250

320

50

KHz

mS

ꢀSec

mV

Power On, to Vout regulation band, 100%

Remote ON to Vout Regulated

50-75-50% load step to 1% of Vout

same as above

Startup Time

Dynamic Load Response

Dynamic Load Peak Deviation

FEATURES and OPTIONS

75

100

150

Remote On/Off Control ➅

"N" sufﬁx

Negative Logic, ON state

Negative Logic, OFF state

Control Current

ON = pin grounded or external voltage

OFF = pin open or external voltage

open collector/drain

-0.7

10

1.0

15

Vdc

mA

1

"P" sufﬁx

Positive Logic, ON state

Positive Logic, OFF state

Control Current

ON = pin open or external voltage

OFF = ground pin or external voltage

open collector/drain

10

-0.7

15

1.0

V

mA

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MDC_ULT Series.F05 Page 3 of 26

ULT Series

Thirty-Second-Brick Isolated DC/DC Converters

with 2:1 Wide Input Range

FUNCTIONAL SPECIFICATIONS (ULT-3.3/7.5-D48-C, CONT.)

OUTPUT

Minimum

Typical/Nominal

Maximum

Units

Conditions ➀

Total Output Power

Voltage

0

24.75

25

W

Nominal Output Voltage

Setting Accuracy

Output Trim Range ➇

Overvoltage Protection

Current

3.2505

-1.5

-20

3.3

3.35

1.5

10

Vdc

% of Vout

Vdc

At 50% load

User selectable (see trim formulas)

3.9

4.6

Output Current Range

Minimum Load

Current Limit Inception ➈

Short Circuit

0

7.5

A

no minimal load required

98% of Vnom., after warmup

8.8

10.8

12.5

Hiccup technique, autorecovery within 1.25%

of Vout

Short Circuit Current

0.3

A

Short Circuit Duration (remove short for

recovery)

Short circuit protection method

Output shorted to ground, no damage

Hiccup current limiting

Continuous

Non-latching

Regulation ➆

Line Regulation

Load Regulation

Vin=min. to max., Vout=nom., full load

Iout=min. to max., Vin=nom.

Tested with eight 47ꢀF ceramic caps in parallel

At all outputs

0.15

0.2

50

% of Vout

mV pk-pk

% of Vout./°C

μF

% of Vout

Units

Inches

12

45

0.02

Ripple and Noise

Temperature Coefﬁcient

Maximum Capacitive Loading

Remote Sense Compliance

MECHANICAL (Through Hole Models)

Outline Dimensions

Low ESR

400

5,000

10

Maximum

Vsense = Vout - Vload, sense connected at load

Conditions ➀ ➂

Minimum

Typical/Nominal

0.92 x 0.75 x 0.35

23.4x19.05x8.89

0.32

(Please refer to outline drawing)

Weight

LxWxH

mm

Ounces

Grams

9.07

Through Hole Pin Diameter

.04 & .062

1.02 & 1.57

Brass

Inches

mm

Through Hole Pin Material

TH Pin Plating Metal and Thickness

Nickel subplate

Gold overplate

50

3-5

ꢀ-inches

ENVIRONMENTAL

See derating curves

Vin = Zero (no power)

-40

-55

120

85

125

140

°C

Operating Ambient Temperature Range ➉

Storage Temperature

Thermal Protection/Shutdown

Electromagnetic Interference

Conducted, EN55022/CISPR22

RoHS rating

130

External ﬁlter is required

B

Class

RoHS-6

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MDC_ULT Series.F05 Page 4 of 26

ULT Series

Thirty-Second-Brick Isolated DC/DC Converters

with 2:1 Wide Input Range

Performance Speciﬁcation Notes

➀

All speciﬁcations are typical unless noted. Ambient temperature =

+25°Celsius, V^INis nominal, output current is maximum rated nominal.

External output capacitance consists of 400ꢀF capacitors across output

pins; one 33ꢀF low ESR, and three 1ꢀF external input capacitors. All caps

are low ESR.

Testing must be kept short enough that the converter does not appreciably

heat up during testing. For extended testing, use plenty of airﬂow. See

derating curves for temperature performance. All models are stable and

regulate within spec without external cacacitance.

➆

Regulation speciﬁcations describe the deviation as the input line voltage

or output load current is varied from a nominal midpoint value to either

extreme (50% load).

➇

➈

➉

11

Do not exceed maximum power ratings, sense limits or output overvoltage

when adjusting output trim values.

Output overload protection is non-latching. When the output overload

is removed, the output will automatically recover.

All models are fully operational and meet published speciﬁcations,

including “cold start” at –40°C.

➁

➂

Input Ripple Current is tested and speciﬁed over a 5-20 MHz bandwidth

and uses a special set of external ﬁlters only for the Ripple Current speci-

ﬁcations. Input ﬁltering is C^IN= 33 ꢀF, CBUS = 220 ꢀF, LBUS = 12 ꢀH. Use

capacitor rated voltages which are twice the maximum expected voltage.

Capacitors must accept high speed AC switching currents.

The converter will shut off if the input falls below the undervoltage thresh-

old. It will not restart until the input exceeds the Input Start Up Voltage.

12

Output noise may be further reduced by installing an external ﬁlter. See

the Application Notes. Use only as much output ﬁltering as needed and no

more. Larger caps (especially low-ESR ceramic types) may slow transient

response or degrade dynamic performance. Thoroughly test your applica-

tion with all components installed.

Note that Maximum Current Derating Curves indicate an average current

at nominal input voltage. At higher temperatures and/or lower airﬂow, the

converter will tolerate brief full current outputs if the average RMS current

over time does not exceed the Derating curve. All Derating curves are

presented at sea level altitude. Be aware of reduced power dissipation

with increasing density altitude.

13

14

If reverse polarity is accidentally applied to the input, always connect an

external fast blow input fuse in series with the +V^INinput.

Although extremely unlikely, failure of the internal components of this

product may expose external application circuits to dangerous voltages,

currents, temperatures or power levels. Please thoroughly verify all ap-

plications before committing them to service. Be sure to include appropri-

ately rated FUSES (see speciﬁcations and Application Notes) to reduce the

risk of failure.

➃

➄

Mean Time Before Failure (MTBF) is calculated using the Telcordia (Bel-

core) SR-332 Method 1, Case 3, Issue 1, ground ﬁxed conditions. Operat-

ing temperature = +25°C, full output load, natural air convection.

The output may be shorted to ground indeﬁnitely with no damage. The

Output Short Circuit Current shown in the speciﬁcations is an average con-

sisting of very short bursts of full rated current to test whether the output

circuit can be repowered.

15

Special care should be exercised so that Input Voltage Transient does not

exceed speciﬁed Max 100V/100ms. At normal input a large transient spike

can be generated as a result of distribution inductance and high inrush

current charging input cap on converter. This can be eliminated with 33ꢀF

electrolytic capacitor mounted close to Converter input. The series resis-

tance (500mꢁ < ESR < 700mꢁ) is essential in this solution.

➅

The On/Off pin allows the converter to be turned on or off by an external

device such as a switch, a transistor, a logic gate, or an optical isolator.

If the “logic pin” is left ﬂoating the measured voltage will be outside the

limit's in the data sheet. Those numbers deﬁne the levels needed for the

“control function” to take place and do not represent the voltage that may

be present on the logic pin.

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MDC_ULT Series.F05 Page 5 of 26

ULT Series

Thirty-Second-Brick Isolated DC/DC Converters

with 2:1 Wide Input Range

TYPICAL PERFORMANCE DATA, ULT-3.3/7.5-D48-C

Efﬁciency vs. Line Voltage and Load Current @ 25°C

Power Dissipation @ 25°C

86

85

84

83

4.50

4.25

4.00

3.75

3.50

3.25

3.00

2.75

2.50

2.25

2.00

1.75

1.50

VIN = 36V

V^IN= 48V

V^IN= 60V

V^IN= 75V

VIN = 36V

V^IN= 48V

V^IN= 60V

V^IN= 75V

82

81

80

79

78

2.5

3.0

3.5

4.0

4.5

5.0

5.5

6.0

6.5

7.0

7.5

2.50

3.50

5.50

7.00

7.50

Amps

Load Current (Amps)

Maximum Current Temperature Derating at sea level

Vin = 36V (air ﬂow from Pin 3 to Pin 1 on PCB)

Maximum Current Temperature Derating at sea level

Vin = 48V (air ﬂow from Pin 3 to Pin 1 on PCB)

8

7

6

5

4

3

8

7

6

5

4

3

0.33 m/s (65 LFM)

0.5 m/s (100 LFM)

1.0 m/s (200 LFM)

1.5 m/s (300 LFM)

2.0 m/s (400 LFM)

0.33 m/s (65 LFM)

0.5 m/s (100 LFM)

1.0 m/s (200 LFM)

1.5 m/s (300 LFM)

2.0 m/s (400 LFM)

30

35

40

45

50

55

60

65

70

75

80

85

30

35

40

45

50

55

60

65

70

75

80

85

Ambient Temperature (°C)

Maximum Current Temperature Derating at sea level

Vin = 60V (air ﬂow from Pin 3 to Pin 1 on PCB)

Maximum Current Temperature Derating at sea level

Vin = 75V (air ﬂow from Pin 3 to Pin 1 on PCB)

8

7

6

5

4

3

8

7

6

5

4

3

0.33 m/s (65 LFM)

0.5 m/s (100 LFM)

1.0 m/s (200 LFM)

1.5 m/s (300 LFM)

2.0 m/s (400 LFM)

0.33 m/s (65 LFM)

0.5 m/s (100 LFM)

1.0 m/s (200 LFM)

1.5 m/s (300 LFM)

2.0 m/s (400 LFM)

30

35

40

45

50

55

60

65

70

75

80

85

30

35

40

45

50

55

60

65

70

75

80

85

Ambient Temperature (°C)

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MDC_ULT Series.F05 Page 6 of 26

ULT Series

Thirty-Second-Brick Isolated DC/DC Converters

with 2:1 Wide Input Range

TYPICAL PERFORMANCE DATA, ULT-3.3/7.5-D48-C

On/Off Enable Delay Startup (Vin=48V, Vout=3.3V, Iout=7.5A,

Cload=400uF, Ta=+25°C) Ch1=Enable, Ch4=Vout

Vin Startup Delay (Vin=48V, Vout=3.3V, Iout=7.5A, Cload=400uF, Ta=+25°C)

Ch1=Vin, Ch4=Vout

Output Ripple and Noise (Vin=48V, Iout=7.5A, Cload=0, 4x100ꢀF caps,

Ta=+25°C, ScopeBW=20Mhz

Output Ripple and Noise (Vin=48V, Iout=0A, Cload=0, 4x100ꢀF caps,

Ta=+25°C, ScopeBW=20Mhz)

Stepload Transient Response (Vin=48V, Iout=50-75-50% of Imax,

Cload=4x100ꢀF, Ta=+25°C)

Thermal image with hot spot at full load current with 25°C ambient temperature. Natural

convection is used with no forced airﬂow. Identiﬁable and recommended maximum value

to be veriﬁed in application. Vin=48V, Q8 max Temp=104°C.

www.murata-ps.com/support

MDC_ULT Series.F05 Page 7 of 26

ULT Series

Thirty-Second-Brick Isolated DC/DC Converters

with 2:1 Wide Input Range

FUNCTIONAL SPECIFICATIONS (ULT-5/5-D48-C)

ABSOLUTE MAXIMUM RATINGS

Minimum

Typical/Nominal

Maximum

Units

Conditions ➀

Input Voltage, Continuous

Full temperature range

Operating or non-operating, 100 mS max.

duration

36

80

Vdc

15

100

Vdc

Input Voltage, Transient

Isolation Voltage

Input to output tested

None, install external fuse

Power on or off, referred to -Vin

1500

Vdc

W

A

°C

Input Reverse Polarity

On/Off Remote Control

Output Power

Output Current

Storage Temperature Range

none

0

15

25.25

5

Current-limited, no damage, short-circuit protected

Vin = Zero (no power)

-55

125

Absolute maximums are stress ratings. Exposure of devices to greater than any of these conditions may adversely affect long-term reliability. Proper operation under conditions other than those

listed in the Performance/Functional Speciﬁcations Table is not implied or recommended.

INPUT

Conditions ➀ ➂

Operating voltage range

Recommended External Fuse

36

48

2

75

Vdc

A

Fast blow

12

Rising input voltage

Falling input voltage

32

33.25

34.25

34

1.61

Vdc

Start-up threshold

11

30.8

1.03

32.5

1.31

N/A

Capacitive

Vdc

Undervoltage lockout (@ ½ load)

Turn-On/Turn-Off Hysteresis

Overvoltage shutdown

Reverse Polarity Protection

Internal Filter Type

Rising input voltage

None, install external fuse

Input current

Full Load Conditions

Low Line

Inrush Transient

Short Circuit input current

No Load input current

Shut-Down Mode input current (Off, UV, OT)

Vin = nominal

Vin = minimum

0.59

0.79

0.05

50

20

1

0.6

0.81

A

A2-Sec.

mA

100

40

3

Iout = minimum, unit=ON

mA

Measured at input with speciﬁed ﬁlter

15

30

mA, pk-pk

Reﬂected (back) ripple current ➁

GENERAL and SAFETY

Vin=48V

Vin=36V

87

89

88.5

%

Efﬁciency

Isolation

Isolation Voltage, Input to Output

Isolation Voltage

Insulation Safety Rating

Isolation Resistance

Isolation Capacitance

1500

basic

Vdc

10

MΩ

pF

1650

Yes

UL-60950-1, CSA-C22.2 No.60950-1,

IEC/60950-1, 2nd edition

Safety

Per Telcordia SR332, issue 1, class 3, ground

ﬁxed, Tambient=+25°C

7.3

Hours x 10⁶

Calculated MTBF ➃

DYNAMIC CHARACTERISTICS

Fixed Switching Frequency

Startup Time

225

255

5

75

150

285

10

KHz

mS

ꢀSec

mV

Power On, to Vout regulation band, 100%

Remote ON to Vout Regulated

50-75-50% load step to 1% error band

same as above

Startup Time

Dynamic Load Response

Dynamic Load Peak Deviation

FEATURES and OPTIONS

150

Remote On/Off Control ➅

"N" sufﬁx

Negative Logic, ON state

Negative Logic, OFF state

Control Current

ON = pin grounded or external voltage

OFF = pin open or external voltage

open collector/drain

-0.7

10

1.2

15

Vdc

mA

1

"P" sufﬁx

Positive Logic, ON state

Positive Logic, OFF state

Control Current

ON = pin open or external voltage

OFF = ground pin or external voltage

open collector/drain

10

-0.7

15

1.2

V

mA

www.murata-ps.com/support

MDC_ULT Series.F05 Page 8 of 26

ULT Series

Thirty-Second-Brick Isolated DC/DC Converters

with 2:1 Wide Input Range

FUNCTIONAL SPECIFICATIONS (ULT-5/5-D48-C, CONT.)

OUTPUT

Minimum

Typical/Nominal

Maximum

Units

Conditions ➀

Total Output Power

Voltage

0

25

25.25

W

Nominal Output Voltage

Setting Accuracy

Output Trim Range ➇

Overvoltage Protection

Current

Output Current Range

Minimum Load

Current Limit Inception ➈

Short Circuit

4.925

-1.5

-20

6

5

5.075

1.5

10

Vdc

% of Vo nom

% of Vout

Vdc

At 50% load

User selectable (see trim formulas)

6.6

5

7.2

0

5

A

98% of Vnom., after warmup

5.5

7

8.4

Hiccup technique, autorecovery within 1.25%

of Vout

Short Circuit Current

0.3

A

Short Circuit Duration (remove short for

recovery)

Short circuit protection method

Output shorted to ground, no damage

Hiccup current limiting

Continuous

Non-latching

Regulation ➆

Line Regulation

Load Regulation

Vin=min. to max., Vout=nom., full load

Iout=min. to max., Vin=nom.

Tested with eight 47ꢀF ceramic caps in parallel

At all outputs

0.1

0.125

75

% of Vout

mV pk-pk

% of Vout./°C

μF

% of Vout

Units

Inches

12

50

0.02

Ripple and Noise

Temperature Coefﬁcient

Maximum Capacitive Loading

Remote Sense Compliance

MECHANICAL (Through Hole Models)

Outline Dimensions

Low ESR

400

5,000

10

Maximum

Vsense = Vout - Vload, sense connected at load

Conditions ➀ ➂

Minimum

Typical/Nominal

0.92 x 0.75 x 0.35

23.4x19.05x8.89

0.32

(Please refer to outline drawing)

Weight

LxWxH

mm

Ounces

Grams

9.07

Through Hole Pin Diameter

.04 & .062

1.02 & 1.57

Brass

Inches

mm

Through Hole Pin Material

TH Pin Plating Metal and Thickness

Nickel subplate

Gold overplate

50

3-5

ꢀ-inches

ENVIRONMENTAL

No Derating, full power, Natural convection,

Vertical mount. See derating curves.

Vin = Zero (no power)

-40

85

°C

Operating Ambient Temperature Range ➉

Storage Temperature

-55

120

125

140

°C

Thermal Protection/Shutdown

Electromagnetic Interference

Conducted, EN55022/CISPR22

RoHS rating

130

External ﬁlter is required

B

Class

RoHS-6

www.murata-ps.com/support

MDC_ULT Series.F05 Page 9 of 26

ULT Series

Thirty-Second-Brick Isolated DC/DC Converters

with 2:1 Wide Input Range

Performance Speciﬁcation Notes

➀

All speciﬁcations are typical unless noted. Ambient temperature =

+25°Celsius, V^INis nominal, output current is maximum rated nominal.

External output capacitance consists of 400ꢀF capacitors across output

pins; one 33ꢀF low ESR, and three 1ꢀF external input capacitors. All caps

are low ESR.

Testing must be kept short enough that the converter does not appreciably

heat up during testing. For extended testing, use plenty of airﬂow. See

derating curves for temperature performance. All models are stable and

regulate within spec without external cacacitance.

➆

Regulation speciﬁcations describe the deviation as the input line voltage

or output load current is varied from a nominal midpoint value to either

extreme (50% load).

➇

➈

➉

11

Do not exceed maximum power ratings, sense limits or output overvoltage

when adjusting output trim values.

Output overload protection is non-latching. When the output overload

is removed, the output will automatically recover.

All models are fully operational and meet published speciﬁcations,

including “cold start” at –40°C.

➁

➂

Input Ripple Current is tested and speciﬁed over a 5-20 MHz bandwidth

and uses a special set of external ﬁlters only for the Ripple Current speci-

ﬁcations. Input ﬁltering is C^IN= 33 ꢀF, CBUS = 220 ꢀF, LBUS = 12 ꢀH. Use

capacitor rated voltages which are twice the maximum expected voltage.

Capacitors must accept high speed AC switching currents.

The converter will shut off if the input falls below the undervoltage thresh-

old. It will not restart until the input exceeds the Input Start Up Voltage.

12

Output noise may be further reduced by installing an external ﬁlter. See

the Application Notes. Use only as much output ﬁltering as needed and no

more. Larger caps (especially low-ESR ceramic types) may slow transient

response or degrade dynamic performance. Thoroughly test your applica-

tion with all components installed.

Note that Maximum Current Derating Curves indicate an average current

at nominal input voltage. At higher temperatures and/or lower airﬂow, the

converter will tolerate brief full current outputs if the average RMS current

over time does not exceed the Derating curve. All Derating curves are

presented at sea level altitude. Be aware of reduced power dissipation

with increasing density altitude.

13

14

If reverse polarity is accidentally applied to the input, always connect an

external fast blow input fuse in series with the +V^INinput.

Although extremely unlikely, failure of the internal components of this

product may expose external application circuits to dangerous voltages,

currents, temperatures or power levels. Please thoroughly verify all ap-

plications before committing them to service. Be sure to include appropri-

ately rated FUSES (see speciﬁcations and Application Notes) to reduce the

risk of failure.

➃

➄

Mean Time Before Failure (MTBF) is calculated using the Telcordia (Bel-

core) SR-332 Method 1, Case 3, Issue 1, ground ﬁxed conditions. Operat-

ing temperature = +25°C, full output load, natural air convection.

The output may be shorted to ground indeﬁnitely with no damage. The

Output Short Circuit Current shown in the speciﬁcations is an average con-

sisting of very short bursts of full rated current to test whether the output

circuit can be repowered.

15

Special care should be exercised so that Input Voltage Transient does not

exceed speciﬁed Max 100V/100ms. At normal input a large transient spike

can be generated as a result of distribution inductance and high inrush

current charging input cap on converter. This can be eliminated with 33ꢀF

electrolytic capacitor mounted close to Converter input. The series resis-

tance (500mꢁ < ESR < 700mꢁ) is essential in this solution.

➅

The On/Off pin allows the converter to be turned on or off by an external

device such as a switch, a transistor, a logic gate, or an optical isolator.

If the “logic pin” is left ﬂoating the measured voltage will be outside the

limit's in the data sheet. Those numbers deﬁne the levels needed for the

“control function” to take place and do not represent the voltage that may

be present on the logic pin.

www.murata-ps.com/support

MDC_ULT Series.F05 Page 10 of 26

ULT Series

Thirty-Second-Brick Isolated DC/DC Converters

with 2:1 Wide Input Range

TYPICAL PERFORMANCE DATA, ULT-5/5-D48

Efﬁciency vs. Line Voltage and Load Current @ 25°C

Current Limit

90

88

86

5.5

5.0

4.5

4.0

3.5

3.0

2.5

2.0

1.5

1.0

0.5

0.0

V^IN= 75V

VIN = 36V

V^IN= 60V

V^IN= 48V

84

VIN = 36V

V^IN= 48V

V^IN= 60V

V^IN= 75V

82

80

78

76

74

72

70

6.2 6.3 6.4 6.5 6.6 6.7 6.8 6.9 7.0 7.1 7.2 7.3 7.4 7.5 7.6

Amps

0.49 1.00

1.50

2.01

2.50

3.00 3.51

4.00

4.50

5.01

Load Current (Amps)

Power Dissipation @ 25°C

3.5

3.25

3.0

2.75

2.5

2.25

2.0

1.75

1.5

1.25

1.0

VIN = 36V

V^IN= 48V

V^IN= 60V

V^IN= 75V

0.75

0.5

0.49 1.00

1.50

2.01

2.50

3.00 3.51

4.00

4.50

5.01

Amps

Maximum Current Temperature Derating at sea level

Vin = 36-75V (air ﬂow from Pin 3 to Pin 1 on PCB)

6

5

4

3

2

1

0.33-2.0 m/s (65–400 LFM)

0

30

35

40

45

50

55

60

65

70

75

80

85

Ambient Temperature (°C)

www.murata-ps.com/support

MDC_ULT Series.F05 Page 11 of 26

ULT Series

Thirty-Second-Brick Isolated DC/DC Converters

with 2:1 Wide Input Range

TYPICAL PERFORMANCE DATA, ULT-5/5-D48

On/Off Enable Delay (Vin=48V, Vout=nom, Iout=5A, Cload=400uF, Ta=+25°C,

ScopeBW=20Mhz) Ch1=Enable, Ch4=Vout

Vin Startup Delay (Vin=48V, Vout=5V, Iout=5A, Cload=400uF, Ta=+25°C)

Ch1=Vin, Ch4=Vout

Stepload Transient Response (Vin=48V, Iout=50-75-50% of Imax,

Cload=4x100ꢀF, Ta=+25°C)

Output Ripple and Noise (Vin=48V, Iout=5A, Cload=0, 4x100ꢀF caps,

Ta=+25°C, ScopeBW=20Mhz)

Thermal image with hot spot at full load current with 25 °C ambient temperature. Natural

convection is used with no forced airﬂow. Identiﬁable and recommended maximum value

to be veriﬁed in application. Vin=48V, Q8 max Temp=96°C.

www.murata-ps.com/support

MDC_ULT Series.F05 Page 12 of 26

ULT Series

Thirty-Second-Brick Isolated DC/DC Converters

with 2:1 Wide Input Range

FUNCTIONAL SPECIFICATIONS (ULT-12/2.5-D48-C)

ABSOLUTE MAXIMUM RATINGS

Input Voltage, Continuous

Minimum

Typical/Nominal

Maximum

Units

Vdc

Conditions ➀

Full temperature range

36

80

Operating or non-operating, 100 mS max.

duration

15

100

Vdc

Input Voltage, Transient

Isolation Voltage

Input Reverse Polarity

On/Off Remote Control

Output Power

Output Current

Storage Temperature Range

Input to output tested

None, install external fuse

Power on or off, referred to -Vin

1500

Vdc

W

A

°C

none

0

15

30.3

2.5

Current-limited, no damage, short-circuit protected

Vin = Zero (no power)

-40

125

Absolute maximums are stress ratings. Exposure of devices to greater than any of these conditions may adversely affect long-term reliability. Proper operation under conditions other than those

listed in the Performance/Functional Speciﬁcations Table is not implied or recommended.

INPUT

Conditions ➀ ➂

Operating voltage range

Recommended External Fuse

36

48

75

2

Vdc

A

Fast blow

12

Rising input voltage

Falling input voltage

Rising input voltage

32

33

34

Vdc

Start-up threshold

11

30.75

31.8

N/A

1.31

None

Capacitive

33

Vdc

Undervoltage lockout (@ ½ load)

Overvoltage shutdown

Turn-On/Turn-Off Hysteresis

Reverse Polarity Protection

Internal Filter Type

1.3

1.32

None, install external fuse

Input current

Full Load Current Conditions

Low Line Input Currrent

Inrush Transient

Short Circuit Input Current.

No Load Input Currrent

Vin = nominal

Vin = minimum

Vin = 48V.

0.68

0.92

0.05

20

0.70

0.95

A

A2-Sec.

mA

0.1

40

3

Iout = minimum, unit=ON

Shutdown Mode Input Current (Off, UV, OT)

1

mA

Measured at input with speciﬁed ﬁlter

30

mA, pk-pk

Reﬂected (back) ripple current ➁

GENERAL and SAFETY

Vin=48V

Vin=36V

90

89

92

91

%

Efﬁciency

Isolation

Isolation Voltage, Input to Output

Insulation Safety Rating

Isolation Resistance

Isolation Capacitance

1500

Vdc

basic

100

1600

MΩ

pF

UL-60950-1, CSA-C22.2 No.60950-1,

IEC/60950-1, 2nd edition

Safety

Yes

Per Telcordia SR332, issue 1, class 3, ground

ﬁxed, Tambient=+25°C

TBD

Hours x 10⁶

Calculated MTBF ➃

DYNAMIC CHARACTERISTICS

Fixed Switching Frequency

270

300

6

330

30

KHz

mS

Power On, to Vout regulation band,

100% resistive load

Startup Time

Remote ON to Vout Regulated

50-75-50% load step to 1% error band

same as above

12

100

150

30

150

250

mS

ꢀSec

mV

Dynamic Load Response

Dynamic Load Peak Deviation

FEATURES and OPTIONS

Remote On/Off Control ➅

"N" sufﬁx

Negative Logic, ON state

Negative Logic, OFF state

Control Current

ON = pin grounded or external voltage

OFF = pin open or external voltage

open collector/drain

-0.7

10

0.9

15

Vdc

mA

1

"P" sufﬁx

Positive Logic, ON state

Positive Logic, OFF state

Control Current

ON = pin open or external voltage

OFF = ground pin or external voltage

open collector/drain

10

-0.7

15

0.9

V

mA

www.murata-ps.com/support

MDC_ULT Series.F05 Page 13 of 26

ULT Series

Thirty-Second-Brick Isolated DC/DC Converters

with 2:1 Wide Input Range

FUNCTIONAL SPECIFICATIONS (ULT-12/2.5-D48-C, CONT.)

OUTPUT

Minimum

Typical/Nominal

Maximum

Units

Conditions ➀

Total Output Power

Voltage

0

30

30.3

W

Nominal Output Voltage

Setting Accuracy

Output Trim Range ➇

Overvoltage Protection

Current

Output Current Range

Minimum Load

Current Limit Inception ➈

Short Circuit

11.88

-1

-20

12

12.12

1

10

Vdc

% of Vo nom

% of Vout

Vdc

At 50% load

User selectable (see trim formulas)

13.3

15

2.5

18

0

2.5

4.3

A

no minimal load required

98% of Vnom., after warmup

2.65

3.55

Hiccup technique, autorecovery within 1.25%

of Vout

Short Circuit Current

0.4

A

Short Circuit Duration (remove short for

recovery)

Short circuit protection method

Output shorted to ground, no damage

Hiccup current limiting

Continuous

Non-latching

Regulation ➆

Line Regulation

Load Regulation

Vin=min. to max., Vout=nom., full load

Iout=min. to max., Vin=nom.

Tested with 4x47uF output caps.

At all outputs

0.075

0.125

100

% of Vout

mV pk-pk

% of Vout./°C

μF

% of Vout

Units

Inches

12

70

0.02

Ripple and Noise

Temperature Coefﬁcient

Maximum Capacitive Loading

Remote Sense Compliance

MECHANICAL (Through Hole Models)

Outline Dimensions

Full resistive load, low ESR

Vsense = Vout - Vload, sense connected at load

Conditions ➀ ➂

200

2,200

10

Maximum

Minimum

Typical/Nominal

0.92 x 0.75 x 0.35

23.4x19.05x8.89

0.32

(Please refer to outline drawing)

Weight

LxWxH

mm

Ounces

Grams

9.07

Through Hole Pin Diameter

.04 & .062

1.02 & 1.57

Brass

Inches

mm

Through Hole Pin Material

TH Pin Plating Metal and Thickness

Nickel subplate

Gold overplate

50

3-5

ꢀ-inches

ENVIRONMENTAL

Operating Ambient Temperature Range ➉

Storage Temperature

Thermal Protection/Shutdown

Electromagnetic Interference

Conducted, EN55022/CISPR22

RoHS rating

See derating curves

Vin = Zero (no power)

-40

-55

120

85

125

140

°C

130

External ﬁlter is required

B

Class

RoHS-6

www.murata-ps.com/support

MDC_ULT Series.F05 Page 14 of 26

ULT Series

Thirty-Second-Brick Isolated DC/DC Converters

with 2:1 Wide Input Range

Performance Speciﬁcation Notes

➀

All speciﬁcations are typical unless noted. Ambient temperature =

+25°Celsius, V^INis nominal, output current is maximum rated nominal.

External output capacitance consists of 400ꢀF capacitors across output

pins; one 33ꢀF low ESR, and three 1ꢀF external input capacitors. All caps

are low ESR.

Testing must be kept short enough that the converter does not appreciably

heat up during testing. For extended testing, use plenty of airﬂow. See

derating curves for temperature performance. All models are stable and

regulate within spec without external cacacitance.

➆

Regulation speciﬁcations describe the deviation as the input line voltage

or output load current is varied from a nominal midpoint value to either

extreme (50% load).

➇

➈

➉

11

Do not exceed maximum power ratings, sense limits or output overvoltage

when adjusting output trim values.

Output overload protection is non-latching. When the output overload

is removed, the output will automatically recover.

All models are fully operational and meet published speciﬁcations,

including “cold start” at –40°C.

➁

➂

Input Ripple Current is tested and speciﬁed over a 5-20 MHz bandwidth

and uses a special set of external ﬁlters only for the Ripple Current speci-

ﬁcations. Input ﬁltering is C^IN= 33 ꢀF, CBUS = 220 ꢀF, LBUS = 12 ꢀH. Use

capacitor rated voltages which are twice the maximum expected voltage.

Capacitors must accept high speed AC switching currents.

The converter will shut off if the input falls below the undervoltage thresh-

old. It will not restart until the input exceeds the Input Start Up Voltage.

12

Output noise may be further reduced by installing an external ﬁlter. See

the Application Notes. Use only as much output ﬁltering as needed and no

more. Larger caps (especially low-ESR ceramic types) may slow transient

response or degrade dynamic performance. Thoroughly test your applica-

tion with all components installed.

Note that Maximum Current Derating Curves indicate an average current

at nominal input voltage. At higher temperatures and/or lower airﬂow, the

converter will tolerate brief full current outputs if the average RMS current

over time does not exceed the Derating curve. All Derating curves are

presented at sea level altitude. Be aware of reduced power dissipation

with increasing density altitude.

13

14

If reverse polarity is accidentally applied to the input, always connect an

external fast blow input fuse in series with the +V^INinput.

Although extremely unlikely, failure of the internal components of this

product may expose external application circuits to dangerous voltages,

currents, temperatures or power levels. Please thoroughly verify all ap-

plications before committing them to service. Be sure to include appropri-

ately rated FUSES (see speciﬁcations and Application Notes) to reduce the

risk of failure.

➃

➄

Mean Time Before Failure (MTBF) is calculated using the Telcordia (Bel-

core) SR-332 Method 1, Case 3, Issue 1, ground ﬁxed conditions. Operat-

ing temperature = +25°C, full output load, natural air convection.

The output may be shorted to ground indeﬁnitely with no damage. The

Output Short Circuit Current shown in the speciﬁcations is an average con-

sisting of very short bursts of full rated current to test whether the output

circuit can be repowered.

15

Special care should be exercised so that Input Voltage Transient does not

exceed speciﬁed Max 100V/100ms. At normal input a large transient spike

can be generated as a result of distribution inductance and high inrush

current charging input cap on converter. This can be eliminated with 33ꢀF

electrolytic capacitor mounted close to Converter input. The series resis-

tance (500mꢁ < ESR < 700mꢁ) is essential in this solution.

➅

The On/Off pin allows the converter to be turned on or off by an external

device such as a switch, a transistor, a logic gate, or an optical isolator.

If the “logic pin” is left ﬂoating the measured voltage will be outside the

limit's in the data sheet. Those numbers deﬁne the levels needed for the

“control function” to take place and do not represent the voltage that may

be present on the logic pin.

www.murata-ps.com/support

MDC_ULT Series.F05 Page 15 of 26

ULT Series

Thirty-Second-Brick Isolated DC/DC Converters

with 2:1 Wide Input Range

TYPICAL PERFORMANCE DATA, ULT-12/2.5-D48

Efﬁciency vs. Line Voltage and Load Current @ 25°C

Power Dissipation @ 25°C

2.85

2.60

2.35

2.10

1.85

1.60

1.35

1.10

0.85

0.60

92

90

88

86

VIN = 36V

V^IN= 48V

V^IN= 60V

V^IN= 75V

VIN = 36V

V^IN= 48V

V^IN= 60V

VIN = 72V

84

82

80

78

76

74

72

0.25

0.50

0.75

1.00

1.25

1.50

1.75

2.00

2.25

2.50

Amps

0.25

0.50

0.75

1.00

1.25

1.50

1.75

2.00

2.25

2.50

Load Current (Amps)

Maximum Current Temperature Derating at sea level

Vin = 36-48V (air ﬂow from Pin 3 to Pin 1 on PCB)

3

2

1

0.33-2.0 m/s (65-400 LFM)

0

30

35

40

45

50

55

60

65

70

75

80

85

Ambient Temperature (°C)

Maximum Current Temperature Derating at sea level

Vin = 60V (air ﬂow from Pin 3 to Pin 1 on PCB)

Maximum Current Temperature Derating at sea level

Vin = 75V (air ﬂow from Pin 3 to Pin 1 on PCB)

3

2

1

0

3

2

1

0

.033 m/s (65 LFM)

0.5 m/s (100 LFM)

1.0 m/s (200 LFM)

.033 m/s (65 LFM)

0.5 m/s (100 LFM)

1.0-2.0 m/s (200-400 LFM)

1.5-2.0 m/s (300-400 LFM)

30

35

40

45

50

55

60

65

70

75

80

85

30

35

40

45

50

55

60

65

70

75

80

85

Ambient Temperature (°C)

www.murata-ps.com/support

MDC_ULT Series.F05 Page 16 of 26

ULT Series

Thirty-Second-Brick Isolated DC/DC Converters

with 2:1 Wide Input Range

TYPICAL PERFORMANCE DATA, ULT-12/2.5-D48

On/Off Enable Delay Startup (Vin=48V, Vout=12V, Iout=2.5A, Cload=188uF, Ta=+25°C)

Ch1=Enable, Ch4=Vout

Vin Startup Delay (Vin=48V, Vout=12V, Iout=2.5A, Cload=188uF, Ta=+25°C)

Ch1=Vin, Ch4=Vout

Stepload Transient Response (Vin=48V, Iout=50-75-50 of Imax,

Cload=4x47uF, Ta=+25°C)

Output Ripple and Noise (Vin=48V, Iout=2.5A, Cload=4 (47 uF caps),

Ta=+25°C, ScopeBW=20Mhz)

Startup Delay (Vin=48V, Iout=2.5A, Cload=188uf, Ta=+25°C) Ch1=Vin, Ch2=Vout

Thermal image with hot spot at full load current with +25°C ambient temperature. Natural

convection is used with no forced airﬂow. Identiﬁable and recommended maximum value

to be veriﬁed in application. Vin=48V, T1 max Temp=83°C.

www.murata-ps.com/support

MDC_ULT Series.F05 Page 17 of 26

ULT Series

Thirty-Second-Brick Isolated DC/DC Converters

with 2:1 Wide Input Range

MECHANICAL SPECIFICATIONS,THROUGH-HOLE MOUNT

19.1

.75

Important! Always connect the sense pins. If they

are not connected to a remote load, wire each

sense pin to its respective voltage output at the

converter pins.

The 0.19-inch pin length is shown. Please refer to

the part number structure for alternate pin lengths.

Pin material: Brass.

Finish (all pins):

Gold (3-5 µ-inches min)

Over Nickel (50 µ-inches min)

23.4

.92

.010 MIN

CLEARANCE

TOP VIEW

Please note that some competitive units may use

different pin numbering or alternate outline views;

however, all units are plugin-compatible.

4.8

.19

MTG PLANE

8.9

.35

END

VIEW

1.02±0.05

.040±.002

1.52±0.05

.060±.002

@ PINS 1-3, 5-7

ISOMETRIC VIEW

@ PINS 4 & 8

1.79±0.05

.071±.002

TYP SHOULDER

FOR 40 MIL PINS

3.0

.12

13.64

.537

#1

#4

#3

3

3.81

.150

4

5

6

15.24

.600

INPUT/OUTPUT CONNECTIONS

2

1

7.62

.300

7

8

3

Function

–Vin

4

Function

–Vout

3.81

.150

5

–Sense

Trim

2

1

On/Off Control

+Vin

6

3.8

.15

.04 X 45°

CHAMFER

7

+Sense

+Vout

8

BOTTOM VIEW

Dimensions are in inches (mm) shown for ref. only.

DIMENSIONS ARE IN INCHES [mm]

Third Angle Projection

TOLERANCES:

2 PLACE .02

3 PLACE .010

ANGLES:

1

COMPONENTS SHOWN ARE FOR REFERENCE ONLY

MATERIAL:

Tolerances (unless otherwise speciﬁed):

.XX 0.02 (0.5)

.XXX 0.010 (0.25)

Angles 2ꢂ

.040 PINS: COPPER ALLOY

.060 PINS: COPPER ALLOY

FINISH: (ALL PINS)

GOLD (5μ"MIN) OVER NICKEL (50μ" MIN)

Components are shown for reference only

and may vary between units.

www.murata-ps.com/support

MDC_ULT Series.F05 Page 18 of 26

ULT Series

Thirty-Second-Brick Isolated DC/DC Converters

with 2:1 Wide Input Range

MECHANICAL SPECIFICATIONS, SURFACE MOUNT

Important! Always connect the sense pins. If they

are not connected to a remote load, wire each

sense pin to its respective voltage output at the

converter pins.

TOP VIEW

19.1

.75

Pin material: Brass.

Finish (all pins):

Gold (3-5 µ-inches min)

Over Nickel (50 µ-inches min)

Please note that some competitive units may use

different pin numbering or alternate outline views;

however, all units are plugin-compatible.

23.4

.92

Coplanarity spec: 0.004" [0.1mm]

END

VIEW

.010 MIN

CLEARANCE

8.9

.35

MTG PLANE

1.57±0.05

.062±.002

PINS 1-8

ALL PINS COPLANAR

ISOMETRIC VIEW

@

WITHIN .004

3.0

.12

13.64

.537

#1

3

3.81

.150

4

5

6

15.24

.600

INPUT/OUTPUT CONNECTIONS

2

1

7.62

.300

7

8

3

Function

–Vin

4

Function

–Vout

3.81

.150

5

–Sense

Trim

2

1

On/Off Control

+Vin

6

3.8

.15

7

+Sense

+Vout

BOTTOM

VIEW

8

.04 X 45°

CHAMFER

Dimensions are in inches (mm) shown for ref. only.

Third Angle Projection

DIMENSIONS ARE IN INCHES [mm]

TOLERANCES:

2 PLACE .02

3 PLACE .010

ANGLES:

1

COMPONENTS SHOWN ARE FOR REFERENCE ONLY

Tolerances (unless otherwise speciﬁed):

.XX 0.02 (0.5)

.XXX 0.010 (0.25)

Angles 2ꢂ

MATERIAL:

SMT PINS: COPPER ALLOY

FINISH: (ALL PINS)

GOLD (5μ"MIN) OVER NICKEL (50μ" MIN)

Components are shown for reference only

and may vary between units.

www.murata-ps.com/support

MDC_ULT Series.F05 Page 19 of 26

ULT Series

Thirty-Second-Brick Isolated DC/DC Converters

with 2:1 Wide Input Range

RECOMMENDED FOOTPRINT,THROUGH-HOLE (VIEW THROUGH CONVERTER)

TOP VIEW

FINISHED HOLE SIZES

@ PINS 1-3, 5-7

(PRI) (SEC)

^{(PER IP}.^C0^-D4^-28⁷-^5,.0^LE6^VE2^{L C)}

FINISHED HOLE SIZES

@ PINS 4 & 8

13.64

.537

(PER IPC-D-275, LEVEL C)

.070-.084

4.19

.165

3.81

.150

1

2

3

8

7

6

5

4

7.62

.300

24.1

.95

15.24

.600

3.81

.150

3.29

.130

.100 MIN

ANNULAR RING

FOR ALL PIN

SHOULDERS

19.7

.78

IT IS RECOMMENDED THAT NO PARTS

BE PLACED BENEATH CONVERTER

RECOMMENDED FOOTPRINT, SURFACE MOUNT (VIEW THROUGH CONVERTER)

TOP VIEW

.070" [1.78mm]

MIN PAD

(8 PLACES)

(PRI) (SEC)

13.64

.537

4.19

.165

3.81

.150

1

2

3

8

7

6

5

4

7.62

.300

24.1

.95

15.24

.600

Dimensions are in inches (mm) shown for ref. only.

Third Angle Projection

3.81

.150

3.29

.130

Tolerances (unless otherwise speciﬁed):

.XX 0.02 (0.5)

.XXX 0.010 (0.25)

Angles 2ꢂ

19.7

.78

IT IS RECOMMENDED THAT NO PARTS

BE PLACED BENEATH CONVERTER

Components are shown for reference only

and may vary between units.

www.murata-ps.com/support

MDC_ULT Series.F05 Page 20 of 26

ULT Series

Thirty-Second-Brick Isolated DC/DC Converters

with 2:1 Wide Input Range

SHIPPING TRAYS AND BOXES,THROUGH-HOLE MOUNT

FOAM PAD

EACH STATIC DISSIPATIVE

POLYETHYLENE FOAM TRAY

ACCOMMODATES 49

CONVERTERS

69.9±6.4

2.75±.25

CLOSED HEIGHT

IN A 7 X 7 ARRAY

279.4±6.4

11.00±.25

266.7±6.4

10.50±.25

49 UNITS PER TRAY

2 TRAYS PER CARTON

MPQ=98 UNITS

www.murata-ps.com/support

MDC_ULT Series.F05 Page 21 of 26

ULT Series

Thirty-Second-Brick Isolated DC/DC Converters

with 2:1 Wide Input Range

TAPE AND REEL INFORMATION, SURFACE MOUNT (MSL RATING 2)

Feed (Unwind)

Direction ----

Pin #1

INDICATOR

2.00

.079

21.0

.83

4.00

.157

Round

Holes

22.00

.866

44.00

1.732

32.00

1.260

PITCH

1.6

.06

Oblong

Holes

6.0-6.3

VACUUM PICKUP

8.9

.35

Top Cover Tape

PACKAGING CONFORMS TO EIA-481

TAPE AND REEL

(200 UNITS PER REEL)

PACKAGED AS MSL2

13.0

.51

44.0

1.73

330.2

13.00

Dimensions are in inches (mm shown for ref. only).

Third Angle Projection

Tolerances (unless otherwise speciﬁed):

.XX 0.02 (0.5)

.XXX 0.010 (0.25)

Angles 1ꢂ

Components are shown for reference only.

www.murata-ps.com/support

MDC_ULT Series.F05 Page 22 of 26

ULT Series

Thirty-Second-Brick Isolated DC/DC Converters

with 2:1 Wide Input Range

TECHNICAL NOTES

Input Fusing

circuits and layout as shown in the following two ﬁgures. External input capaci-

tors (CIN in Figure 2) serve primarily as energy-storage elements, minimiz-

ing line voltage variations caused by transient IR drops in conductors from

backplane to the DC/DC. Input caps should be selected for bulk capacitance

(at appropriate frequencies), low ESR, and high rms-ripple-current ratings. The

switching nature of DC/DC converters requires that dc voltage sources have

low ac impedance as highly inductive source impedance can affect system

stability. In Figure 2, CBUS and LBUS simulate a typical dc voltage bus. Your

speciﬁc system conﬁguration may necessitate additional considerations.

Certain applications and/or safety agencies may require the installation of

fuses at the inputs of power conversion components. Fuses should also be

used if the possibility of sustained, non-current-limited, input-voltage polarity

reversals exists. For Murata Power Solutions' ULT series DC/DC converters, we

recommend the use of a fast blow fuse, installed in the ungrounded input sup-

ply line with a typical value about twice the maximum input current, calculated

at low line with the converter’s minimum efﬁciency.

All relevant national and international safety standards and regulations must

be observed by the installer. For system safety agency approvals, the convert-

ers must be installed in compliance with the requirements of the end- use

safety standard.

TO

CURRENT

PROBE

OSCILLOSCOPE

+VIN

–VIN

LBUS

Input Reverse-Polarity Protection

+

If the input voltage polarity is accidentally reversed, an internal diode will be-

come forward biased and likely draw excessive current from the power source.

If this source is not current limited or the circuit appropriately fused, it could

cause permanent damage to the converter.

VIN

CBUS

CIN

–

C

IN = 33μF, ESR < 700mΩ @ 100kHz

BUS = 220μF, ESR < 100mΩ @ 100kHz

Input Under-Voltage Shutdown and Start-Up Threshold

C

Under normal start-up conditions, devices will not begin to regulate properly

until the ramping-up input voltage exceeds the Start-Up Threshold Voltage.

Once operating, devices will not turn off until the input voltage drops below the

Under-Voltage Shutdown limit. Subsequent re-start will not occur until the input

is brought back up to the Start-Up Threshold. This built in hysteresis prevents

any unstable on/off situations from occurring at a single input voltage.

LBUS = 12μH

Figure 2. Measuring Input Ripple Current

In critical applications, output ripple/noise (also referred to as periodic and

random deviations or PARD) may be reduced below speciﬁed limits using ﬁlter-

ing techniques, the simplest of which is the installation of additional external

output capacitors. They function as true ﬁlter elements and should be selected

for bulk capacitance, low ESR and appropriate frequency response.

Start-Up Time

The VIN to VOUT Start-Up Time is the time interval between the point at which

the ramping input voltage crosses the Start-Up Threshold and the fully loaded

output voltage enters and remains within its speciﬁed accuracy band. Actual

measured times will vary with input source impedance, external input capaci-

tance, and the slew rate and ﬁnal value of the input voltage as it appears at the

converter. The ULT Series implements a soft start circuit to limit the duty cycle

of its PWM controller at power up, thereby limiting the input inrush current.

All external capacitors should have appropriate voltage ratings and be

located as close to the converter as possible. Temperature variations for all

relevant parameters should also be taken carefully into consideration. The most

effective combination of external I/O capacitors will be a function of line voltage

and source impedance, as well as particular load and layout conditions.

Floating Outputs

The On/Off Control to V^OUTstart-up time assumes the converter has its

nominal input voltage applied but is turned off via the On/Off Control pin. The

speciﬁcation deﬁnes the interval between the point at which the converter is

turned on (released) and the fully loaded output voltage enters and remains

within its speciﬁed accuracy band. Similar to the V^INto VOUT start-up, the On/Off

Control to V^OUTstart-up time is also governed by the internal soft start circuitry

and external load capacitance. The difference in start up time from V^INto VOUT

and from On/Off Control to V^OUTis therefore insigniﬁcant.

Since these are isolated DC/DC converters, their outputs are “ﬂoating” with

respect to their input. Designers will normally use the –Output as the ground/

return of the load circuit. You can however, use the +Output as ground/return to

effectively reverse the output polarity.

Minimum Output Loading Requirements

ULT converters employ a synchronous-rectiﬁer design topology and all models

regulate within spec and are stable under no-load to full load conditions.

Operation under no-load conditions however might slightly increase the output

ripple and noise.

Input Source Impedance

The input of ULT converters must be driven from a low ac-impedance source. The

DC/DC’s performance and stability can be compromised by the use of highly induc-

tive source impedances. The input circuit shown in Figure 2 is a practical solution

that can be used to minimize the effects of inductance in the input traces. For opti-

mum performance, components should be mounted close to the DC/DC converter.

Maximum

Model

Tested with

Capacitance

Loading

Four 100ꢀF output capacitors & Three 1ꢀF and

33ꢀF (low ESR) external input capacitors

Four 100ꢀF output capacitors & Three 1ꢀF and

33ꢀF (low ESR) external input capacitors

Four 47ꢀF output capacitors & three 1ꢀF and 33ꢀF

(low ESR) external input capacitors.

ULT-3.3/7.5-D48

ULT-5/5-D48

5000ꢀF

2200ꢀF

I/O Filtering, Input Ripple Current, and Output Noise

All models in the ULT Series are tested/speciﬁed for input reﬂected ripple cur-

rent and output noise using the speciﬁed external input/output components/

ULT-12/2.5-D48

www.murata-ps.com/support

MDC_ULT Series.F05 Page 23 of 26

ULT Series

Thirty-Second-Brick Isolated DC/DC Converters

with 2:1 Wide Input Range

Short Circuit Condition

+SENSE

When a converter is in current-limit mode, the output voltage will drop as

the output current demand increases. If the output voltage drops too low, the

magnetically coupled voltage used to develop primary side voltages will also

drop, thereby shutting down the PWM controller. Following a time-out period,

the PWM will restart causing the output voltage to begin ramping to their ap-

propriate value. If the short-circuit condition persists, another shutdown cycle

will be initiated. This on/off cycling is referred to as “hiccup” mode. The hiccup

cycling reduces the average output current, thereby preventing internal tem-

peratures from rising to excessive levels. The ULT Series is capable of enduring

an indeﬁnite short circuit output condition.

+OUTPUT

C1 C2 C3 C4

RLOAD

SCOPE

–OUTPUT

–SENSE

C1–C4 = 100μF CERAMIC*

LOAD 2-3 INCHES (51-76mm) FROM MODULE

*The ULT-12/2.5-D48 model is tested with 47μF output caps.

Figure 3. Measuring Output Ripple/Noise (PARD)

Remote Sense

Thermal Shutdown

Note: The Sense and VOUT lines are internally connected through low-value

resistors. Nevertheless, if the sense function is not used for remote regulation

the user should connect the +Sense to +V^OUTand –Sense to –VOUT at the DC/

DC converter pins. ULT series converters employ a sense feature to provide

point of use regulation, thereby overcoming moderate IR drops in PCB conduc-

tors or cabling. The remote sense lines carry very little current and therefore

require minimal cross-sectional-area conductors. The sense lines, which are

capacitively coupled to their respective output lines, are used by the feedback

control-loop to regulate the output. As such, they are not low impedance points

and must be treated with care in layouts and cabling. Sense lines on a PCB

should be run adjacent to dc signals, preferably ground.

The ULT converters are equipped with thermal-shutdown circuitry. If environ-

mental conditions cause the temperature of the DC/DC converter to rise above

the designed operating temperature, a precision temperature sensor inside

the PWM (see U1 in ﬁgure 4) will power down the unit. When the internal

temperature decreases below the threshold of the temperature sensor, the unit

will self-start. See Performance/Functional Speciﬁcations.

[V^OUT(+)-VOUT(–)] – [Sense(+)-Sense(–)]  10%VOUT

In cables and discrete wiring applications, twisted pair or other techniques

should be used. Output over-voltage protection is monitored at the output volt-

age pin, not the Sense pin. Therefore, excessive voltage differences between

V^OUTand Sense in conjunction with trim adjustment of the output voltage can

cause the over-voltage protection circuitry to activate (see Performance Speci-

ﬁcations for over-voltage limits). Power derating is based on maximum output

current and voltage at the converter’s output pins. Use of trim and sense func-

tions can cause output voltages to increase, thereby increasing output power

beyond the converter’s speciﬁed rating, or cause output voltages to climb into

the output over-voltage region. Therefore, the designer must ensure:

Figure 4. Thermal Shutdown

Output Over-Voltage Protection

(V^OUTat pins) x (IOUT)  rated output power

The ULT output voltage is monitored for an over-voltage condition using a

comparator. The signal is optically coupled to the primary side and if the output

voltage rises to a level which could be damaging to the load, the sensing

circuitry will power down the PWM controller causing the output voltage to de-

crease. Following a time-out period the PWM will restart, causing the output volt-

age to ramp to its appropriate value. If the fault condition persists, and the output

voltage again climbs to excessive levels, the over-voltage circuitry will initiate

another shutdown cycle. This on/off cycling is referred to as “hiccup” mode.

Contact and PCB resistance

losses due to IR drops

+VOUT

+VIN

IOUT

+SENSE

Sense Current

Current Limiting

ON/OFF

CONTROL

TRIM

–SENSE

–VOUT

LOAD

As soon as the output current increases to approximately 130% of its rated

value, the DC/DC converter will go into a current-limiting mode. In this condi-

tion, the output voltage will decrease proportionately with increases in output

current, thereby maintaining somewhat constant power dissipation. This is

commonly referred to as power limiting. Current limit inception is deﬁned

as the point at which the full-power output voltage falls below the speciﬁed

tolerance. See Performance/Functional Speciﬁcations. If the load current, being

drawn from the converter, is signiﬁcant enough, the unit will go into a short

circuit condition as described below.

Sense Return

IOUT Return

–VIN

Contact and PCB resistance

losses due to IR drops

Figure 5. Remote Sense Circuit Conﬁguration

www.murata-ps.com/support

MDC_ULT Series.F05 Page 24 of 26

ULT Series

Thirty-Second-Brick Isolated DC/DC Converters

with 2:1 Wide Input Range

On/Off Control

The input-side, remote On/Off Control function can be ordered to operate with

either logic type.

+VIN

+Vcc

Positive ("P" sufﬁx) logic models are enabled when the on/off pin is

left open (or is pulled high, applying +10V to +15V with respect to –Input).

Positive-logic devices are disabled when the on/off pin is pulled low (-0.7 to

0.9V with respect to –Input).

13V CIRCUIT

ON/OFF

CONTROL

5V CIRCUIT

Negative (“N” sufﬁx) logic devices are off when pin is left open (or pulled

high, applying +10V to +15V), and on when pin is pulled low (–0.7 to +0.9V)

with respect to –Input.

–VIN

Figure 6. Driving the Negative Logic On/Off Control Pin

(simpliﬁed circuit)

NOTE: Please refer to the Functional Specs for each speciﬁc ULT model.

Dynamic control of the remote on/off function is best accomplished with a

mechanical relay or an open-collector/open-drain drive circuit (optically isolated

if appropriate). The drive circuit should be able to sink appropriate current (see

Performance Speciﬁcations) when activated and withstand appropriate voltage

when deactivated. Applying an external voltage to pin 2 when no input power is

applied to the converter can cause permanent damage to the converter.

+VOUT

+SENSE

TRIM

+VIN

OUTPUT VOLTAGE ADJUSTMENT

Trim Equations

Adjustable output voltage pin. If the Trim pin is left open circuit the output

voltage is set to Vo nom. Adjustment by means of the external resistor must be

possible to achieve an output voltage of Vo nom. +10% or –20%.

ON/OFF

CONTROL

LOAD

R^{TRIM UP}

–SENSE

–VOUT

Connecting an external resistor between the TRIM pin and the –Sense pin

decreases the output voltage set point. The following equation determines the

required external resistor value to obtain a percentage output voltage change

of Δ%:

–VIN

Figure 7. Trim Connections To Increase Output Voltages

Rtrim-down = [(511/Δ%) – 10.22] KΩ

Where:

Connect sense to its respective V^OUTpin if sense is not used with a remote load.

Δ% = [(Vo set – Vdesired) / Vo set] x 100

Connecting an external resistor between the TRIM pin and the +Sense pin

increases the output voltage set point. The following equation determines the

required external resistor value to obtain a percentage output voltage change

of Δ%:

+VOUT

+VIN

+SENSE

Rtrim-up = [5.11 x Vo set x (100 +Δ%) / (1.225 x Δ%) – (511 / Δ%) – 10.22] KΩ

R^{TRIM DOWN}

ON/OFF

CONTROL

Where:

TRIM

–SENSE

–VOUT

LOAD

Δ% = [(Vdesired – Vo set) / Vo set] x 100

To maintain set point accuracy, the trim resistor tolerance should be at least

1.0%

–VIN

Figure 8. Trim Connections To Decrease Output Voltages

www.murata-ps.com/support

MDC_ULT Series.F05 Page 25 of 26

ULT Series

Thirty-Second-Brick Isolated DC/DC Converters

with 2:1 Wide Input Range

Vertical Wind Tunnel

Murata Power Solutions employs a computer controlled custom-

designed closed loop vertical wind tunnel, infrared video camera sys-

tem, and test instrumentation for accurate airﬂow and heat dissipa-

tion analysis of power products. The system includes a precision low

ﬂow-rate anemometer, variable speed fan, power supply input and

load controls, temperature gauges, and adjustable heating element.

IR Transparent

optical window

Variable

speed fan

Unit under

test (UUT)

The IR camera monitors the thermal performance of the Unit Under

Test (UUT) under static steady-state conditions. A special optical port

is used which is transparent to infrared wavelengths.

IR Video

Camera

Both through-hole and surface mount converters are soldered

down to a 10" x 10" host carrier board for realistic heat absorption

and spreading. Both longitudinal and transverse airﬂow studies are

possible by rotation of this carrier board since there are often signiﬁ-

cant differences in the heat dissipation in the two airﬂow directions.

The combination of adjustable airﬂow, adjustable ambient heat, and

adjustable Input/Output currents and voltages mean that a very wide

range of measurement conditions can be studied.

Heating

element

Precision

low-rate

anemometer

3” below UUT

The collimator reduces the amount of turbulence adjacent to the

UUT by minimizing airﬂow turbulence. Such turbulence inﬂuences the

effective heat transfer characteristics and gives false readings. Excess

turbulence removes more heat from some surfaces and less heat

from others, possibly causing uneven overheating.

Ambient

temperature

sensor

Airﬂow

collimator

Both sides of the UUT are studied since there are different thermal

gradients on each side. The adjustable heating element and fan, built-in

temperature gauges, and no-contact IR camera mean that power supplies

are tested in real-world conditions.

Figure 9. Vertical Wind Tunnel

Through-hole Soldering Guidelines

SMT Reﬂow Soldering Guidelines

Murata Power Solutions recommends the TH soldering speciﬁcations below when install-

ing these converters. These speciﬁcations vary depending on the solder type. Exceeding

The surface-mount reﬂow solder proﬁle shown below is suitable for SAC305 type lead-

free solders. This graph should be used only as a guideline. Many other factors inﬂuence

these speciﬁcations may cause damage to the product. Your production environment may the success of SMT reﬂow soldering. Since your production environment may differ,

please thoroughly review these guidelines with your process engineers.

differ; therefore please thoroughly review these guidelines with your process engineers.

Wave Solder Operations for through-hole mounted products (THMT)

For Sn/Ag/Cu based solders:

Maximum Preheat Temperature

Maximum Pot Temperature

Maximum Solder Dwell Time

For Sn/Pb based solders:

Maximum Preheat Temperature

Maximum Pot Temperature

Maximum Solder Dwell Time

115° C.

270° C.

7 seconds

105° C.

250° C.

6 seconds

This product is subject to the following operating requirements

and the Life and Safety Critical Application Sales Policy:

Refer to: http://www.murata-ps.com/requirements/

Murata Power Solutions, Inc.

11 Cabot Boulevard, Mansﬁeld, MA 02048-1151 U.S.A.

ISO 9001 and 14001 REGISTERED

Murata Power Solutions, Inc. makes no representation that the use of its products in the circuits described herein, or the use of other

technical information contained herein, will not infringe upon existing or future patent rights. The descriptions contained herein do not imply

the granting of licenses to make, use, or sell equipment constructed in accordance therewith. Speciﬁcations are subject to change without

notice.

www.murata-ps.com/support

MDC_ULT Series.F05 Page 26 of 26


型号：	ULT-12/2.5-D48P-C
厂家：	muRata
描述：	民用设备,工业设备
文件：	总26页 (文件大小：2156K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

ULT-12/2.5-D48P-C [MURATA]

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