UWE-15/5-Q48P-C_技术文档

UWE Series

www.murata-ps.com

Wide Input, Isolated

Eighth-Brick DC-DC Converters

The UWE Series "Eighth-Brick" DC-DC Converters are high-current isolated

power modules designed for use in high-density system boards.

Typical unit

FEATURES

PRODUCT OVERVIEW



Industry-standard through-hole eighth-brick

package with 0.9" x 2.3" x 0.38" outline

dimensions

With dimensions of only 0.9 by 2.3 by 0.38

inches, the UWE series open frame DC-DC convert-

ers deliver up to 75 Watts in an industry-standard

“eighth-brick” through-hole package. This format

can plug directly into quarter-brick pinouts. Several

standard ﬁxed-output voltages from 3.3 Vdc to 24

Vdc assure compatibility in embedded equipment,

tight line/load regulation, stable no-load operation

and fast load step response. All units are precision

assembled in a highly automated facility with ISO-

traceable manufacturing quality standards.

Isolation of 2250 Volts (Q48 models) assures

safety and fully differential (ﬂoating) operation for

greatest application ﬂexibility. On-board Sense in-



Choice of two wide input ranges, 9-36 Vdc or

18-75 Vdc



Fixed output from 3.3 to 24 Volts DC up to 75

Watts

CPU cards and instrument subsystems. The extend- puts compensate for line drop errors at high output



Synchronous rectiﬁcation yields very high

efﬁciency and low power dissipation

ed 4-to-1 input power range (9-36V) is ideal for

battery-powered, telecom or portable applications.

Very high efﬁciency means no fans or temperature

deratings in many applications. An optional thermal

mounting baseplate extends operation into most

conceivable environments.

currents. Outputs are trimmable within 10ꢀ of

nominal voltage. The UWE series are functionally

complete.



Operating temperature range from -40 to

+85˚C with derating

A wealth of protection features prevents damage

to both the converter and outside circuits. Inputs

are protected from undervoltage and outputs fea-

ture short circuit protection, overcurrent and excess

temperature shut down. Overloads automatically

recover using the “hiccup” technique upon fault

removal. The UWE is certiﬁed to standard safety

and EMI/RFI approvals. All units meet RoHS-6

hazardous materials compliance.



Up to 2250 Volt DC isolation (Q48 models)



Outstanding thermal performance and derating

The synchronous rectiﬁer design uses the

maximum available duty cycle for greatest ef-

ﬁciency and low power dissipation with no reverse

output conduction. Other features include low

on-resistance FET’s, planar magnetics and heavy-

copper PC boards. These deliver low output noise,



Extensive self-protection, overtemperature

and overload features with no output reverse

conduction



On/Off control, trim and remote sense functions



Certiﬁed to UL/EN/IEC 60950-1, CAN/CSA-C22.2

No. 60950-1, 2nd Edition, safety approvals

and EN55022/CISPR22 standards



Pre-bias operation for startup protection

+VOUT

+VIN

SWITCH

DRIVE

VOLTAGE

+SENSE

−VOUT

REGULATOR

SS

PWM

–VIN

−SENSE

TRIM

ON/OFF

CONTROL

REFERENCE

AMPLIFIER,

TRIM AND FEEDBACK

ISOLATION

UV, OT

Typical topology is shown.

Figure 1. Simpliﬁed Block Diagram

For full details go to

www.murata-ps.com/rohs

Q48 models only

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MDC_UWE Series.E04 Page 1 of 23

UWE Series

Wide Input, Isolated

Eighth-Brick DC-DC Converters



PERFORMANCE SPECIFICATIONS SUMMARY AND ORDERING GUIDE

Output

Input

I^IN, no

Efﬁciency

I^IN, full

R/N (mVp-p) ➂

Regulation (max.)

VOUT

(V)

IOUT

(A)

Power

(W)

VIN Nom. Range

load

(A)

Package

(Case, Pinout)

Root Model 

UWE-3.3/20-Q12

UWE-3.3/20-Q48

UWE-5/15-Q12

UWE-5/15-Q48

UWE-12/6-Q12

UWE-12/6-Q48

UWE-15/5-Q12

UWE-15/5-Q48

UWE-24/3-Q12 

Typ.

80

Max.

125

225

125

150

180

150

125

150

275

Line

Load

(V)

12

48

12

48

12

48

12

48

12

(V)

(mA)

Min.

87ꢀ

Typ.

89ꢀ

3.3

20

15

6

66

75

72

75

72

0.25ꢀ

0.2ꢀ

0.25ꢀ

0.125ꢀ

0.15ꢀ

0.05ꢀ

0.075ꢀ

0.125ꢀ

9-36

160

75

6.18

1.54

6.87

1.74

6.56

1.65

6.83

1.73

6.70

165

80

18-75

9-36

88ꢀ

89.5ꢀ

91ꢀ

5.0

0.25ꢀ

0.2ꢀ

185

90

89ꢀ

5.0

135

120

115

65

18-75

9-36

88.5ꢀ

90ꢀ

12.0

15.0

24.0

0.125ꢀ

0.1ꢀ

200

90

91.5ꢀ

91ꢀ

C77, P32

6

18-75

9-36

89ꢀ

5

0.125ꢀ

270

90

89.5ꢀ

89ꢀ

91.5ꢀ

90.5ꢀ

89.5ꢀ

5

90

18-75

9-36

3

190

110

88.3ꢀ

 Please refer to the part number structure for additonal ordering model numbers and options.

 All speciﬁcations are at nominal line voltage, nominal output voltage and full load, +25° C.

unless otherwise noted. See detailed speciﬁcations.

 I/O caps are necessary for our test equipment and may not be needed for your application.

 Load regulation range: 0.1-3A. This is required only for our test equipment. The converter will

operate at zero output current with degraded regulation.

 Output capacitors are 1 μF ceramic in parallel with 10 μF electrolytic. Input cap is 100 μF. All

caps are low ESR types. Contact Murata Power Solutions for details.

PART NUMBER STRUCTURE

U W E - 12 / 6 - Q12 P B H LX - C

Unipolar, Single-Output

RoHS Hazardous Materials Compliance

C=RoHS-6, standard (does not claim EU RoHS exemption 7b–lead in solder)

Pin Length Option

Wide Input Range

Blank = Standard pin length 0.19 inches (4.8mm)

L1 = Pin length 0.110 inches (2.79mm)*

L2 = Pin length 0.145 inches (3.68mm)*

Eighth-Brick Package

Nominal Output Voltage

Conformal Coating Option

Blank = No coating, standard

H = Coating added, optional*

*Special quantity order is required;

no sample quantities available.

(built to order; contact Murata Power Solutions for MOQ and lead times.)

Maximum Rated Output

Current in Amps

Baseplate (optional)

Note:

Blank = No baseplate (standard)

B = Baseplate installed (optional special order)

Some model number combinations

may not be available. Please contact

Murata Power Solutions.

Input Voltage Range

On/Off Control Logic

Q12 = 9-36 Volts

Q48 = 18-75 Volts

P = Positive logic (standard for Q12 models, optional for Q48 models)

N = Negative logic (standard for Q48 models, optional special order for Q12 models)

Special Customer Conﬁguration part numbers:

1) UWE-12/6-Q48NB-C-CIS

2) UWE-12/6-Q48NBL1-C-CIS

3) UWE-15/5-Q12P-31318-C (tested to 2500Vdc isolation; all other

standard product speciﬁcations plus conformal coating apply.)

4) UWE-12/6-Q48NBHL1-C-CIS

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MDC_UWE Series.E04 Page 2 of 23

UWE Series

Wide Input, Isolated

Eighth-Brick DC-DC Converters

FUNCTIONAL SPECIFICATIONS, Q12 MODELS

18

UWE-3.3/20-Q12

UWE-5/15-Q12

UWE-12/6-Q12

UWE-15/5-Q12

UWE-24/3-Q12

Specs are typical unless noted.

INPUT

Input voltage range

See ordering guide

Start-up threshold, Volts

Undervoltage shutdown, V.

Overvoltage shutdown, V.

Reﬂected (back) ripple current, mA pk-pk ②

Suggested external fast blow fuse, A

Input current

9.5

8.5

9

8

none

40

8.2

8

25

10

20

1

40

20

Full load conditions

See ordering guide

Inrush transient, A²sec

Input current if output is in short circuit, mA

No load, mA

0.1 A²sec

250

160

8.33

8

200

185

9.42

5

250

270

9.36

5

250

110

9.04

5

200

Low line (Vin=min.), Amps

Standby mode, mA

8.89

5

(Off, UV, OT shutdown)

Internal input ﬁlter type

L-C

Reverse polarity protection

Remote On/Off control

None, install external fuse

OFF=Ground pin to +0.8V max.

ON=open pin or +3.5 to +15V max.

OFF=open pin or +5V to +15V max.

ON=Ground pin or 0 to +0.8V max.

1

Positive logic ("P" model sufﬁx)

Negative logic ("N" model sufﬁx)

Current, mA

OUTPUT

Voltage output range

Voltage output accuracy

Adjustment range

See ordering guide

1ꢀ of Vnom., (50ꢀ load)

-10 to +10ꢀ of Vnom.

0.02ꢀ of Vout range per °C

No minimum load

Temperature coefﬁcient

Minimum loading

Remote sense compensation

Ripple/noise (20 MHz bandwidth)

Line/Load regulation

Efﬁciency

+10ꢀ max.

See ordering guide

Maximum capacitive loading, μF

low ESR, resistive load

10,000

4,700

4700

1500

Isolation voltage

Input to Output, Volts min. DC

Input to baseplate, Volts min. DC

Baseplate to output, Volts min. DC

Isolation resistance, MΩ

Isolation capacitance, pF

Isolation safety rating

1500

750

100

1500

27

1000

22.5

1000

7.25

1000

4.0

1.0

29

Basic insulation

Current limit inception (98% of

Vout, after warmup), Amps

8.5

Short circuit protection method

Short circuit current, Amps

Short circuit duration

Current limiting, hiccup autorestart. Remove overload for recovery.

0.5

1.0

6

1.5

18

Continuous, output shorted to ground. No damage.

Overvoltage protection, Volts

(via magnetic feedback)

4.5

15

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MDC_UWE Series.E04 Page 3 of 23

UWE Series

Wide Input, Isolated

Eighth-Brick DC-DC Converters

FUNCTIONAL SPECIFICATIONS, Q12 MODELS, CONTINUED

DYNAMIC CHARACTERISTICS

UWE-3.3/20-Q12

UWE-5/15-Q12

UWE-12/6-Q12

UWE-15/5-Q12

UWE-24/3-Q12

Dynamic load response, μSec

(50-75-50% load step) to 1%

of ﬁnal value

50

Start-up time

Vin to Vout regulated, mSec

Remote On/Off to Vout regulated, mSec

Switching frequency, KHz

ENVIRONMENTAL

20

5

20

15

40

30

25

40

30

245 25

215-250

275 25

215 15

Operating temperature range, no baseplate

with derating, °C (see Derating curves)

-40 to +85 with derating

Storage temperature range, °C

Maximum baseplate operating temperature, °C

Thermal protection/shutdown, °C

Relative humidity

-55 to +125

+100

+120

to +85°C/85ꢀ non-condensing

PHYSICAL

Outline dimensions

Pin material

See mechanical specs

Copper alloy

Pin Finish

Nickel underplate with gold overplate (see mechanical specs for details)

Pin diameter, inches

Pin diameter, mm

0.04/0.062

1.016/1.575

0.7

Weight, ounces

Weight, grams

20

Electromagnetic interference (conducted)

Safety

Meets EN55022 and CISPR22 class B with external ﬁlter.

Meets UL/cUL 60950-1, CSA-C22.2 No.60950-1, IEC/EN 60950-1

FUNCTIONAL SPECIFICATIONS, Q48 MODELS

UWE-3.3/20-Q48

UWE-5/15-Q48

UWE-12/6-Q48

UWE-15/5-Q48

Specs are typical unless noted.

INPUT

Input voltage range

See ordering guide

none

Start-up threshold, Volts

Undervoltage shutdown, V. (@ ½ load)

Overvoltage shutdown, V.

Reﬂected (back) ripple current, mA pk-pk

Suggested external fast blow fuse, A

Input current

17.5

16.5

17.5

16.0

17.5

16.0

17.5

16.0

30

8

30

10

40

10

40

20

Full load conditions

Inrush transient, A²sec

0.1 A²sec

100

0.1 A²sec

250

Input current if output is in short circuit, mA

No load, mA

150

75

4.1

4

250

90

4.6

5

90

Low line (Vin=min.), Amps

Standby mode, mA

4.35

4

4.71

5

(Off, UV, OT shutdown)

Internal input ﬁlter type

Pi-type

L-C

Pi-type

L-C

Reverse polarity protection

Remote On/Off control

None, install external fuse

OFF = Ground pin to +0.8V max.

ON = Open pin or +3.5V to +15V max.

OFF = Open pin or +5V to +15V max.

ON = Ground pin to +1V max.

1

Positive logic ("P" model sufﬁx)

Negative logic ("N" model sufﬁx)

Current, mA

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MDC_UWE Series.E04 Page 4 of 23

UWE Series

Wide Input, Isolated

Eighth-Brick DC-DC Converters

FUNCTIONAL SPECIFICATIONS, Q48 MODELS, CONTINUED

OUTPUT

UWE-3.3/20-Q48

UWE-5/15-Q48

UWE-12/6-Q48

UWE-15/5-Q48

Voltage output range

See ordering guide

Voltage output accuracy

Adjustment range

1ꢀ of Vnom., (50ꢀ load)

-10 to +10ꢀ of Vnom.

0.02ꢀ of Vout range per °C

No minimum load

Temperature coefﬁcient

Minimum loading

Remote sense compensation

Ripple/noise (20 MHz bandwidth)

Line/Load regulation

+10ꢀ max.

See ordering guide

Efﬁciency

Maximum capacitive loading, μF

low ESR <0.02Ω max., resistive load

4,700

10,000

4,700

3300

Isolation voltage

Input to Output, Volts min. DC

Input to baseplate, Volts min. DC

Baseplate to output, Volts min. DC

Isolation resistance, MΩ

Isolation capacitance, pF

Isolation safety rating

2250

1500

750

100

1000

26.5

5.0

1500

21.0

1000

8.0

1000

7.05

1.5

Basic insulation

Current limit inception (98% of

Vout, after warmup), Amps

Short circuit protection method

Short circuit current, Amps

Short circuit duration

Current limiting, hiccup autorestart. Remove overload for recovery.

1.5 1.0

Continuous, output shorted to ground. No damage.

Overvoltage protection, Volts

(via magnetic feedback)

4

6.5

15

18

DYNAMIC CHARACTERISTICS

Dynamic load response, μSec

(50-75-50% load step) to ﬁnal value

50 (to 2ꢀ)

50 (to 1ꢀ)

Start-up time

Vin to Vout regulated, mSec

Remote On/Off to Vout regulated, mSec

Switching frequency, KHz

ENVIRONMENTAL

20

10

20

30

20

30

25

215 20

240 20

220 20

225 25

Operating temperature range, no baseplate

with derating, °C (see Derating curves)

-40 to +85 with derating

-55 to +125

Storage temperature range, °C

Maximum baseplate operating temperature, °C

Thermal protection/shutdown, °C

Relative humidity

+100

+120

+105

+120

+100

+120

+105

+120

to +85°C/85ꢀ non-condensing

PHYSICAL

Outline dimensions

Pin material

See mechanical specs

Copper alloy

Pin Finish

Nickel underplate with gold overplate (see mechanical specs for details)

Pin diameter, inches

Pin diameter, mm

0.04/0.062

1.016/1.575

Weight, ounces

0.7

20

Weight, grams

Electromagnetic interference (conducted)

Safety

Meets EN55022 and CISPR22 class B with external ﬁlter.

Certiﬁed to UL/cUL 60950-1, CSA-C22.2 No.60950-1, IEC/EN 60950-1, 2nd Edition

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MDC_UWE Series.E04 Page 5 of 23

UWE Series

Wide Input, Isolated

Eighth-Brick DC-DC Converters

Absolute Maximum Ratings

CALCULATED MTBF (TELCORDIA SR-332 METHOD, SEE NOTE 4A)

Model

Hours

1,248,001

1,847,009

2,273,212

3,755,203

5,750,120

2,386,165

3,294,026

UWE-3.3/20-Q12

UWE-5/15-Q12

UWE-5/15-Q48

UWE-12/6-Q12

UWE-12/6-Q48

Input Voltage

Q12 Models - Volts, max. continuous

Volts, transient, 100 mSec

0-36 VDC

0-50 VDC

Q48 Models - Volts, max. continuous

0-75 VDC

Volts, transient, 100 mSec

0-100 VDC

On/Off Control

-0.7 V. min to +15V max.

UWE-15/5-Q48

UWE-24/3-Q12

Input Reverse Polarity Protection

Output Overvoltage

See Fuse section.

Vout nom. +20ꢀ max.

CALCULATED MTBF (MIL-HDBK-217N2 METHOD, SEE NOTE 4B)

Output Current (Note 7)

Devices can

Current-limited.

UWE-3.3/20-Q12

UWE-5/15-Q12

UWE-5/15-Q48

UWE-12/6-Q12

UWE-12/6-Q48

UWE-15/5-Q48

UWE-24/3-Q12

1,089,141

1,936,627

1,657,518

1,239,521

828,714

withstand sustained short circuit

without damage.

Overtemperature Protection

Device includes electronic over-

temperature shutdown protection

under normal operation.

-55 to +125° C.

Storage Temperature

Lead Temperature

2,112,625

2,623,370

See soldering speciﬁcations

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.

SPECIFICATION NOTES

CAUTION: This product is not internally fused. To comply with safety agency cer-

tiﬁcations and to avoid injury to personnel or equipment, the user must supply an

external fast-blow fuse to the input terminals. See fuse information.

All Q12 models are tested and speciﬁed with external 1μF and 10μF paralleled

ceramic/tantalum output capacitors and a 100μF external input capacitor. Q48

models test with a 35μF input cap. All capacitors are low ESR types. Contact Murata

Power Solutions for details. These capacitors are necessary to accommodate our

test equipment and may not be required to achieve speciﬁed performance in your

applications. However, Murata Power Solutions recommends using these capacitors

in your application. All models are stable and regulate within spec under no-load

conditions.

9

All models are fully operational and meet published speciﬁcations, including “cold

start” at –40° C. At full power, the package temperature of all on-board components

must not exceed +128° C.

1

10 Regulation speciﬁcations describe the deviation as the line input voltage or output

load current is varied from a nominal midpoint value to either extreme.

11 If the user adjusts the output voltage, accuracy is dependent on user-supplied

trim resistors. To achieve high accuracy, use 1ꢀ or better tolerance metal-ﬁlm

resistors. If no trim is installed, the converter will achieve its rated accuracy. Do not

exceed maximum power speciﬁcations when adjusting the output trim.

12 Output current limit and short circuit protection is non-latching. When the overcur-

rent fault is removed, the converter will immediately recover.

All speciﬁcations are typical unless noted. General conditions for Speciﬁcations are

+25° C, Vin=nominal, Vout=nominal, full load. Adequate airﬂow must be supplied

for extended testing under power.

Input Ripple Current is tested and speciﬁed over a 5 Hz to 20 MHz bandwidth. Input

ﬁltering is Cin=33 μF, Cbus=220 μF, Lbus=12 μH.

13 Alternate pin length and/or other output voltages may be available under special

quantity order.

14 At zero output current, the output may contain low frequency components which

exceed the ripple speciﬁcation. The output may be operated indeﬁnitely with no

load.

2

3

Note that Maximum Power Derating curves indicate an average current at nominal

input voltage. At higher temperatures and/or lower airﬂow, the DC-DC converter will

tolerate brief full current outputs if the total RMS current over time does not exceed

the Derating curve. All Derating curves are presented at sea level altitude. Be aware

that power dissipation degrades as altitude increases.

15 Input Fusing: If the input voltage is reversed, a body diode will conduct consider-

able current. Therefore, install an external protection fuse. To ensure reverse input

protection with full output load, always connect an external input fast-blow fuse in

series with the +Vin input. Use approximately twice the full input current rating at

the selected input voltage.

4a Mean Time Before Failure is calculated using the Telcordia (Belcore) SR-332 Method

1, Case 3, ISSUE 2, ground ﬁxed controlled conditions, Tambient=+25°C, full output

load, natural air convection.

4b Mean Time Before Failure is calculated using MIL-HDBK-217F, GB ground benign,

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

16 “Hiccup” overcurrent operation repeatedly attempts to restart the converter with a

brief, full-current output. If the overcurrent condition still exists, the restart current

will be removed and then tried again. This short current pulse prevents overheating

and damaging the converter. Once the fault is removed, the converter immediately

recovers normal operation.

5

The Remote On/Off Control is normally controlled by a switch or open collector or

open drain transistor. But it may also be driven with external logic or by applying

appropriate external voltages which are referenced to Input Common.

Short circuit shutdown begins when the output voltage degrades approximately 2ꢀ

from the selected setting.

The outputs are not intended to sink appreciable reverse current.

Output noise may be further reduced by adding an external ﬁlter. See I/O Filtering

and Noise Reduction. Larger caps (especially low-ESR ceramic capacitors) may

slow transient response or degrade stability. Use only as much output ﬁltering as

needed to achieve your noise requirements and no more. Thoroughly test your

system under full load with all components installed.

17 Note that the converter will operate up to the rated baseplate maximum tempera-

ture with the baseplate installed and properly heat sunk. To avoid thermal self-

protection shutdown, do not exceed this maximum baseplate temperature.

18 UWE-24/3-Q12 undervoltage shutdown of 8.0V is at half load.

19 UWE-24/3-Q12 output overvoltage protection requires 0.3A minimum load.

20 Pre-bias operation: Startup will succeed if the output setpoint voltage is higher than

the pre-existing external output voltage.

6

7

8

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MDC_UWE Series.E04 Page 6 of 23

UWE Series

Wide Input, Isolated

Eighth-Brick DC-DC Converters

PERFORMANCE DATA

UWE-3.3/20-Q12N

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

92

90

88

86

84

82

80

78

76

74

72

Vin = 36 V

Vin = 30 V

Vin = 24 V

Vin = 12 V

Vin = 9 V

2

4

6

8

10

12

14

16

18

20

Load Current (Amps)

UWE-3.3/20-Q12N

Maximum Current Temperature Derating @ sea level

(VIN = 12V, transverse airﬂow, no baseplate)

Maximum Current Temperature Derating @sea level

(VIN = 12V, transverse airﬂow, with baseplate)

20

19

18

17

16

15

14

13

12

11

20

19

18

17

16

15

14

Natural Convection

0.5 m/s (100 LFM)

1.0 m/s (200 LFM)

1.5 m/s (300 LFM)

2.0 m/s (400 LFM)

Natural Convection

0.5 m/s (100 LFM)

1.0 m/s (200 LFM)

1.5 m/s (300 LFM)

2.0 m/s (400 LFM)

13

20

25

30

35

40

45

50

55

60

65

70

75

80

85

90

20

25

30

35

40

45

50

55

60

65

70

75

80

85

90

Ambient Temperature (°C)

UWE-3.3/20-Q12N

Maximum Current Temperature Derating @sea level

(VIN = 24V, transverse airﬂow, with baseplate)

20

19

18

17

16

15

14

Natural Convection

0.5 m/s (100 LFM)

1.0 m/s (200 LFM)

1.5 m/s (300 LFM)

2.0 m/s (400 LFM)

13

20

25

30

35

40

45

50

55

60

65

70

75

80

85

90

Ambient Temperature (°C)

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MDC_UWE Series.E04 Page 7 of 23

UWE Series

Wide Input, Isolated

Eighth-Brick DC-DC Converters

PERFORMANCE DATA

UWE-3.3/20-Q48P

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

94

90

86

82

78

74

70

66

62

58

54

50

Vin = 75 V

Vin = 60 V

Vin = 48 V

Vin = 36 V

Vin = 24 V

Vin = 18 V

2

4

6

8

10

12

14

16

18

20

Load Current (Amps)

UWE-3.3/20-Q48P

Maximum Current Temperature Derating @ sea level

(VIN = 24V, transverse airﬂow, no baseplate)

Maximum Current Temperature Derating @sea level

(VIN = 24V, transverse airﬂow, with baseplate)

20

19

18

17

16

15

20

19

18

17

16

Natural Convection

0.5 m/s (100 LFM)

1.0 m/s (200 LFM)

1.5 m/s (300 LFM)

2.0 m/s (400 LFM)

Natural Convection

0.5 m/s (100 LFM)

1.0 m/s (200 LFM)

1.5 m/s (300 LFM)

2.0 m/s (400 LFM)

20

25

30

35

40

45

50

55

60

65

70

75

80

85

90

15

20

25

30

35

40

45

50

55

60

65

70

75

80

85

90

Ambient Temperature (°C)

UWE-3.3/20-Q48P

Maximum Current Temperature Derating @ sea level

(VIN = 48V, transverse airﬂow, no baseplate)

Maximum Current Temperature Derating @sea level

(VIN = 48V, transverse airﬂow, with baseplate)

20

19

18

17

16

15

14

13

12

20

19

18

17

16

15

14

Natural Convection

0.5 m/s (100 LFM)

1.0 m/s (200 LFM)

1.5 m/s (300 LFM)

2.0 m/s (400 LFM)

Natural Convection

0.5 m/s (100 LFM)

1.0 m/s (200 LFM)

1.5 m/s (300 LFM)

2.0 m/s (400 LFM)

20

25

30

35

40

45

50

55

60

65

70

75

80

85

90

20

25

30

35

40

45

50

55

60

65

70

75

80

85

90

Ambient Temperature (°C)

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MDC_UWE Series.E04 Page 8 of 23

UWE Series

Wide Input, Isolated

Eighth-Brick DC-DC Converters

PERFORMANCE DATA

UWE-5/15-Q12N

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

94

92

90

88

86

84

82

80

78

76

74

72

70

68

66

64

62

60

58

56

54

52

50

Vin = 36 V

Vin = 24 V

Vin = 12 V

Vin = 9 V

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

Load Current (Amps)

UWE-5/15-Q12N

Maximum Current Temperature Derating @ sea level

(VIN = 12V, transverse airﬂow, no baseplate)

Maximum Current Temperature Derating @sea level

(VIN = 12V, transverse airﬂow, with baseplate)

16

15

14

13

12

11

15.5

15

14.5

14

Natural Convection

0.5 m/s (100 LFM)

1.0 m/s (200 LFM)

1.5 m/s (300 LFM)

2.0 m/s (400 LFM)

Natural Convection

0.5 m/s (100 LFM)

1.0 m/s (200 LFM)

1.5 m/s (300 LFM)

2.0 m/s (400 LFM)

13.5

13

12.5

12

11.5

10

20

25

30

35

40

45

50

55

60

65

70

75

80

85

90

11

20

25

30

35

40

45

50

55

60

65

70

75

80

85

90

Ambient Temperature (°C)

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MDC_UWE Series.E04 Page 9 of 23

UWE Series

Wide Input, Isolated

Eighth-Brick DC-DC Converters

PERFORMANCE DATA

UWE-5/15-Q48P

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

90

85

80

75

70

65

60

Vin = 75 V

Vin = 60 V

Vin = 48 V

Vin = 36 V

Vin = 24 V

Vin = 18 V

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

Load Current (Amps)

UWE-5/15-Q48N

Maximum Current Temperature Derating @ sea level

(VIN = 24V, transverse airﬂow, no baseplate)

Maximum Current Temperature Derating @sea level

(VIN = 24V, transverse airﬂow, with baseplate)

15

14.5

14

15

14.5

14

Natural Convection

0.5 m/s (100 LFM)

1.0 m/s (200 LFM)

Natural Convection

0.5 m/s (100 LFM)

1.0 m/s (200 LFM)

1.5 m/s (300 LFM)

2.0 m/s (400 LFM)

13.5

13

13.5

13

12.5

12

12.5

11.5

11

12

20

25

30

35

40

45

50

55

60

65

70

75

80

85

90

20

25

30

35

40

45

50

55

60

65

70

75

80

85

90

Ambient Temperature (°C)

UWE-5/15-Q48N

Maximum Current Temperature Derating @ sea level

(VIN = 48V, transverse airﬂow, no baseplate)

Maximum Current Temperature Derating @sea level

(VIN = 48V, transverse airﬂow, with baseplate)

15

14.5

14

15

14

13

12

11

10

9

Natural Convection

0.5 m/s (100 LFM)

1.0 m/s (200 LFM)

1.5 m/s (300 LFM)

2.0 m/s (400 LFM)

Natural Convection

0.5 m/s (100 LFM)

1.0 m/s (200 LFM)

1.5 m/s (300 LFM)

2.0 m/s (400 LFM)

13.5

13

12.5

12

20

25

30

35

40

45

50

55

60

65

70

75

80

85

90

20

25

30

35

40

45

50

55

60

65

70

75

80

85

90

Ambient Temperature (°C)

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MDC_UWE Series.E04 Page 10 of 23

UWE Series

Wide Input, Isolated

Eighth-Brick DC-DC Converters

PERFORMANCE DATA

UWE-12/6-Q12N

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

Power Dissipation vs. Load Current @ 25°C

10

9

94

92

90

88

86

84

82

80

78

76

74

72

70

68

8

7

Vin = 36 V

Vin = 30 V

Vin = 24 V

Vin = 12 V

Vin = 10 V

Vin = 9 V

6

5

Vin = 36 V

Vin = 30 V

Vin = 24 V

Vin = 12 V

Vin = 10 V

Vin = 9 V

4

3

2

1

2

3

4

5

6

1

2

3

4

5

6

Load Current (Amps)

UWE-12/6-Q12N

Maximum Current Temperature Derating @ sea level

(VIN = 12V, transverse airﬂow, no baseplate)

Maximum Current Temperature Derating @sea level

(VIN = 12V, transverse airﬂow, with baseplate)

6.0

5.5

5.0

4.5

4.0

Natural Convection

0.5 m/s (100 LFM)

1.0 m/s (200 LFM)

1.5+ m/s (300+ LFM)

Natural Convection

0.5 m/s (100 LFM)

1.0 m/s (200 LFM)

1.5 m/s (300 LFM)

2.0 m/s (400 LFM)

5.5

5.0

4.5

4.0

40

45

50

55

60

65

70

75

80

85

90

40

45

50

55

60

65

70

75

80

85

90

Ambient Temperature (°C)

UWE-12/6-Q48P

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

94

92

90

88

86

84

82

80

78

76

74

72

70

68

66

64

62

Vin = 75 V

Vin = 60 V

Vin = 48 V

Vin = 36 V

Vin = 24 V

Vin = 18 V

60

1

2

3

4

5

6

Load Current (Amps)

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MDC_UWE Series.E04 Page 11 of 23

UWE Series

Wide Input, Isolated

Eighth-Brick DC-DC Converters

PERFORMANCE DATA

UWE-12/6-Q48P

Maximum Current Temperature Derating @ sea level

Maximum Current Temperature Derating @sea level

(VIN = 24V, transverse airﬂow, no baseplate)

(V^IN= 24V, transverse airﬂow, with baseplate)

6.5

6.0

5.5

5.0

4.5

4.0

6.5

6.0

5.5

5.0

4.5

Natural Convection

0.5 m/s (100 LFM)

1.0 m/s (200 LFM)

Natural Convection

0.5 m/s (100 LFM)

1.0 m/s (200 LFM)

1.5 m/s (300 LFM)

2.0 m/s (400 LFM)

4.0

20

25

30

35

40

45

50

55

60

65

70

75

80

85

90

20

25

30

35

40

45

50

55

60

65

70

75

80

85

90

Ambient Temperature (°C)

UWE-12/6-Q48P

Maximum Current Temperature Derating @ sea level

(V^IN= 48V, transverse airﬂow, no baseplate)

Maximum Current Temperature Derating @sea level

(V^IN= 48V, transverse airﬂow, with baseplate)

6.5

6

6.5

6

5.5

5

Natural Convection

0.5 m/s (100 LFM)

1.0 m/s (200 LFM)

1.5 m/s (300 LFM)

2.0 m/s (400 LFM)

Natural Convection

0.5 m/s (100 LFM)

1.0 m/s (200 LFM)

1.5 m/s (300 LFM)

2.0 m/s (400 LFM)

5.5

5

4.5

4

4.5

3.5

3

4

20

25

30

35

40

45

50

55

60

65

70

75

80

85

90

20

25

30

35

40

45

50

55

60

65

70

75

80

85

90

Ambient Temperature (°C)

UWE-15/5-Q12P

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

94

92

90

88

86

84

82

80

78

76

74

72

70

68

66

64

62

60

58

56

54

52

50

0.5

Vin = 36 V

Vin = 24 V

Vin = 12 V

Vin = 9 V

1

1.5

2

2.5

3

3.5

4

4.5

5

Load Current (Amps)

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MDC_UWE Series.E04 Page 12 of 23

UWE Series

Wide Input, Isolated

Eighth-Brick DC-DC Converters

PERFORMANCE DATA

UWE-15/5-Q12N

Maximum Current Temperature Derating @ sea level

Maximum Current Temperature Derating @sea level

(VIN = 12V, transverse airﬂow, no baseplate)

(V^IN= 12V, transverse airﬂow, with baseplate)

5

Natural Convection

0.5 m/s (100 LFM)

1.0 m/s (200 LFM)

Natural Convection

0.5 m/s (100 LFM)

1.0 m/s (200 LFM)

1.5 m/s (300 LFM)

2.0 m/s (400 LFM)

4.5

4

3.5

3

20

25

30

35

40

45

50

55

60

65

70

75

80

85

90

20

25

30

35

40

45

50

55

60

65

70

75

80

85

90

Ambient Temperature (°C)

UWE-15/5-Q12N

Maximum Current Temperature Derating @ sea level

(V^IN= 24V, transverse airﬂow, no baseplate)

Maximum Current Temperature Derating @sea level

(V^IN= 24V, transverse airﬂow, with baseplate)

5

Natural Convection

0.5 m/s (100 LFM)

1.0 m/s (200 LFM)

Natural Convection

0.5 m/s (100 LFM)

1.0 m/s (200 LFM)

1.5 m/s (300 LFM)

2.0 m/s (400 LFM)

4.5

4

3.5

3

20

25

30

35

40

45

50

55

60

65

70

75

80

85

90

20

25

30

35

40

45

50

55

60

65

70

75

80

85

90

Ambient Temperature (°C)

UWE-15/5-Q48

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

94

92

90

88

86

84

82

80

78

76

74

72

70

Vin = 18V

Vin = 24V

Vin = 36V

Vin = 48V

Vin = 60V

Vin = 75V

68

1

2

3

4

5

Load Current (Amps)

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MDC_UWE Series.E04 Page 13 of 23

UWE Series

Wide Input, Isolated

Eighth-Brick DC-DC Converters

PERFORMANCE DATA

UWE-15/5-Q48

Power Dissipation vs. Load Current @ 25°C

Maximum Current Temperature Derating @sea level

(Vin = 24V, air ﬂow from Pin 1 to Pin 3 on PCB, with Baseplate)

11

10

9

6

5

4

8

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

7

6

Vin = 18V

5

Vin = 24V

Vin = 36V

Vin = 48V

Vin = 60V

Vin = 75V

4

3

2

1

2

3

4

5

30

35

40

45

50

55

60

65

70

75

80

85

Load Current (Amps)

Ambient Temperature (°C)

UWE-15/5-Q48

Maximum Current Temperature Derating @ sea level

Maximum Current Temperature Derating @sea level

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

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

6

5

4

3

2

5

4

3

2

0.5 to 2.0 m/s (100 to 400 LFM)

0.33 m/s (65 LFM)

0.5 m/s (100 LFM)

1.0 to 2.0 m/s (200 to 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)

UWE-15/5-Q48

Maximum Current Temperature Derating @ sea level

Maximum Current Temperature Derating @sea level

(Vin = 48V, air ﬂow from Pin 1 to Pin 3 on PCB, no baseplate)

(Vin = 60V, air ﬂow from Pin 1 to Pin 3 on PCB, no baseplate)

6

5

4

3

2

6

5

4

3

2

0.33 m/s (65 LFM)

0.5 m/s (100 LFM)

0.33 m/s (65 LFM)

0.5 m/s (100 LFM)

1.0 m/s (200 LFM)

1.5 to 2.0 m/s (300 to 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_UWE Series.E04 Page 14 of 23

UWE Series

Wide Input, Isolated

Eighth-Brick DC-DC Converters

PERFORMANCE DATA

UWE-24/3-Q12P

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

Power Dissipation vs. Load Current @ 25°C

95

93

91

89

87

85

83

81

79

77

75

73

71

69

67

65

12

11

10

9

8

Vin = 36 V

Vin = 30 V

Vin = 24 V

Vin = 12 V

Vin = 10 V

Vin = 9 V

7

6

Vin = 36 V

Vin = 30 V

Vin = 24 V

Vin = 12 V

Vin = 10 V

Vin = 9 V

5

4

3

0 5

1

1 5

2

2 5

3

2

Load Current (Amps)

0 5

1

1.5

2

2.5

3

Load Current (Amps)

Maximum Current Temperature Derating @ sea level

(VIN = 12V, transverse airﬂow, no baseplate)

Maximum Current Temperature Derating @sea level

(V^IN= 12V, transverse airﬂow, with baseplate)

UWE-24/3-Q12P

3.20

3.10

3.00

3.20

3.00

2.80

2.60

2.40

2.90

Natural Convection

0.5 m/s (100 LFM)

1.0 m/s (200 LFM)

1.5 m/s (300 LFM)

2.0 m/s (400 LFM)

Natural Convection

0.5 m/s (100 LFM)

1.0 m/s (200 LFM)

1.5 m/s (300 LFM)

2.0 m/s (400 LFM)

2.80

2.70

2.60

2.50

2.40

40

45

50

55

60

65

70

75

80

85

90

40

45

50

55

60

65

70

75

80

85

90

Ambient Temperature (°C)

Maximum Current Temperature Derating @ sea level

(V^IN= 24V, transverse airﬂow, no baseplate)

Maximum Current Temperature Derating @sea level

(V^IN= 24V, transverse airﬂow, with baseplate)

UWE-24/3-Q12N

3.2

3

3.2

2.8

2.6

2.4

2.2

2.8

2.6

2.4

2.2

2

Natural Convection

0.5 m/s (100 LFM)

1.0 m/s (200 LFM)

1.5 m/s (300 LFM)

2.0 m/s (400 LFM)

Natural Convection

0.5 m/s (100 LFM)

1.0 m/s (200 LFM)

1.5 m/s (300 LFM)

2.0 m/s (400 LFM)

1.8

20

25

30

35

40

45

50

55

60

65

70

75

80

85

90

20

25

30

35

40

45

50

55

60

65

70

75

80

85

90

Ambient Temperature (°C)

www.murata-ps.com/support

MDC_UWE Series.E04 Page 15 of 23

UWE Series

Wide Input, Isolated

Eighth-Brick DC-DC Converters

MECHANICAL SPECIFICATIONS—NO BASEPLATE

2.30

(58.4)

TOP VIEW

ISOMETRIC

VIEW

0.90 (22.9)

0.126 (3.17)

0.071 (1.8)±.002 STANDOFF

0.010 (0.254) MIN

(HIGHEST COMP

TO MTG PLANE)

AT EACH

0.040 (1.02) PIN

END VIEW

SIDE VIEW

0.39

(9.91)

MTG PLANE

0.125

(3.175)

REF

0.19 (4.83)

0.040(1.02) ±.002

AT PINS 1-3, 5-7

DOSA-Compatible

I/O Connections

Function

+Vin

0.062 (1.57) ±.002

AT PINS 4 & 8

1

2

On/Off Control*

–Vin

3

4

–Vout

0.15 (3.8)

PIN 3

2.000

(50.80)

5

–Sense

Trim

PIN 4

PIN 5

6

7

+Sense

+Vout

BOTTOM VIEW

8

* The Remote On/Off can be provided

with either positive (P sufﬁx) or nega-

tive (N sufﬁx) logic.

0.300

(7.62)

0.45

(11.43)

0.600

(15.24)

REF

0.150 (3.81)

0.600

(15.24)

0.150 (3.81)

Connect each sense input to its

respective Vout if sense is not con-

nected at a remote load.

PIN 2

PIN 1

PIN 6

PIN 7

PIN 8

MATERIAL:

.040 PINS: C26000 BRASS, 3/4 HARD

.062 PINS: C10200 COPPER ALLOY, FULL HARD

FINISH: (ALL PINS)

GOLD (5 MICROINCHES MIN) OVER NICKEL (50 MICROINCHES MIN)

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 2˚

Components are shown for reference only.

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MDC_UWE Series.E04 Page 16 of 23

UWE Series

Wide Input, Isolated

Eighth-Brick DC-DC Converters

MECHANICAL SPECIFICATIONS (continued)—BASEPLATE INSTALLED

4X THRU

2.30

(58.4)

M2X0.4 - 6H

.10" MAX SCREW

PENETRATION

TOP VIEW

ISOMETRIC

VIEW

0.90 (22.9)

0.625 (15.88)

0.40

(10.2)

1.500

(38.10)

0.14 (3.6)

ALUMINUM

BASEPLATE

0.071 (1.8)±.002 STANDOFF

AT EACH 0.040 (1.02) PIN

0.010 (0.254) MIN

(HIGHEST COMP

TO MTG PLANE)

END VIEW

SIDE VIEW

0.50

(12.8)

MAX

MTG PLANE

0.19 (4.83)

0.125

(3.175)

REF

0.040(1.02) ±.002

AT PINS 1-3, 5-7

0.062 (1.57) ±.002

AT PINS 4 & 8

0.15 (3.8)

PIN 3

2.000

(50.80)

PIN 4

PIN 5

BOTTOM VIEW

0.300

(7.62)

0.45

(11.43)

0.600

(15.24)

REF

0.150 (3.81)

0.600

(15.24)

0.150 (3.81)

PIN 2

PIN 1

PIN 6

PIN 7

PIN 8

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

MATERIAL:

Third Angle Projection

.040 PINS: C26000 BRASS, 3/4 HARD

.062 PINS: C10200 COPPER ALLOY, FULL HARD

FINISH: (ALL PINS)

GOLD (5 MICROINCHES MIN) OVER NICKEL (50 MICROINCHES MIN)

Tolerances (unless otherwise speciﬁed):

.XX 0.02 (0.5)

.XXX 0.010 (0.25)

Angles 2˚

Components are shown for reference only.

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MDC_UWE Series.E04 Page 17 of 23

UWE Series

Wide Input, Isolated

Eighth-Brick DC-DC Converters

SHIPPING TRAYS AND BOXES

Anti-static foam

Label

For 1–42 pc quantity

For 43–84 pc quantity

SHIPPING TRAY

UWE modules are supplied in a 21-piece (3-by-7) shipping tray. The tray is an anti-static closed-cell polyethylene foam. Dimensions are shown below.

9.920

(252)

+0.000

-0.062

0.910 (23.1) TYP

0.455 (11.6) TYP

0.735 (18.7)

9.920

(252)

+0.000

-0.062

0.625 (15.9) TYP

2.400 (61) TYP

Dimensions in inches (mm)

0.25 R TYP

1.300 (33.0) TYP

0.25 CHAMFER TYP (4-PL)

7.800

1.06

(198.1)

(26.9)

www.murata-ps.com/support

MDC_UWE Series.E04 Page 18 of 23

UWE Series

Wide Input, Isolated

Eighth-Brick DC-DC Converters

The difference in start up time from V^INto VOUT and from On/Off Control to

V^OUTis therefore insigniﬁcant.

TECHNICAL NOTES

Soldering Guidelines

Input Source Impedance

Murata Power Solutions recommends the speciﬁcations below when installing these

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

speciﬁcations may cause damage to the product. Your production environment may dif-

UWE converters must be driven from a low ac-impedance input source.

The DC-DC’s performance and stability can be compromised by the use of

highly inductive source impedances. For optimum performance, compo-

nents should be mounted close to the DC-DC converter. If the application

has a high source impedance, low V^INmodels can benefit from increased

external input capacitance.

fer; 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.

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

270° C.

7 seconds

All models in the UWE Converters are tested/speciﬁed for input reﬂected ripple

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

circuits and layout as shown in the following two ﬁgures.

105° C.

250° C.

External input capacitors (C^INin Figure 2) serve primarily as energy-storage

elements, minimizing 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, C^BUSand LBUS simulate a typical dc voltage bus. Your

speciﬁc system conﬁguration may necessitate additional considerations.

6 seconds

Input Fusing

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 exist. For MPS UWE DC-DC Converters, you should use fast-blow type

fuses, installed in the ungrounded input supply line. Refer to the speciﬁcations

for fuse values.

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, e.g., IEC/EN/UL60950-1.

TO

CURRENT

PROBE

OSCILLOSCOPE

+VIN

LBUS

+

Input Undervoltage Shutdown and Start-Up Threshold

VIN

CBUS

CIN

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

Undervoltage 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.

–

–VIN

CIN = 33μF, ESR < 700mΩ @ 100kHz

C^BUS= 220μF, ESR < 100mΩ @ 100kHz

L^BUS= 12μH

Figure 2. Measuring Input Ripple Current

Start-Up Time

The VIN to VOUT Start-Up Time is the interval of time 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/output

capacitance, and load. The UWE Series implements a soft start circuit that

limits the duty cycle of its PWM controller at power up, thereby limiting the

input inrush 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. These output caps function as true ﬁlter elements and

should be selected for bulk capacitance, low ESR and appropriate frequency

response. 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 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 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 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.

www.murata-ps.com/support

MDC_UWE Series.E04 Page 19 of 23

UWE Series

Wide Input, Isolated

Eighth-Brick DC-DC Converters

Short Circuit Condition

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 voltages to begin ramping to their

appropriate values. 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

temperatures from rising to excessive levels. The UWE is capable of enduring

an indeﬁnite short circuit output condition.

+SENSE

+VOUT

RLOAD

SCOPE

C1

C2

–VOUT

–SENSE

C1 = 0.47μF CERAMIC

C2 = NA

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

Features and Options

On/Off Control

Figure 3. Measuring Output Ripple/Noise (PARD)

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

either logic type:

Floating Outputs

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.

Positive-logic models (“P" part-number sufﬁx) are enabled when the On/Off

Control is left open or is pulled high, as per Figure 4. Positive-logic devices are

disabled when the On/Off Control is pulled low.

Negative-logic devices (“N” sufﬁx) are off when the On/Off Control is open (or

pulled high), and on when the On/Off Control is pulled low with respect to –V^IN

as shown in Figure 5.

Minimum Output Loading Requirements

UWE 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.

+ Vcc

Thermal Shutdown

ON/OFF CONTROL

CONTROL

These UWE converters are equipped with thermal-shutdown circuitry. If envi-

ronmental conditions cause the internal temperature of the DC-DC converter to

rise above the designed operating temperature, a precision temperature sensor

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.

-VIN

Output Overvoltage Protection

UWE output voltages are monitored for an overvoltage condition via magnetic

feedback. The signal is 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 voltages to decrease. Fol-

lowing a time-out period the PWM will restart, causing the output voltages to

ramp to their appropriate values. If the fault condition persists, and the output

voltages again climb to excessive levels, the overvoltage circuitry will initiate

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

Figure 4. Driving the Positive Logic On/Off Control Pin

+ Vcc

ON/OFF

CONTROL

Current Limiting

As soon as the output current increases to substantially above its rated value,

the DC-DC converter will go into a current-limiting mode. In this condition, 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 speciﬁed under "Performance."

–VIN

Figure 5. Driving the Negative Logic On/Off Control Pin

www.murata-ps.com/support

MDC_UWE Series.E04 Page 20 of 23

UWE Series

Wide Input, Isolated

Eighth-Brick DC-DC Converters

Dynamic control of the remote on/off function is facilitated with a mechanical

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

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

Specs) when activated and withstand appropriate voltage when deactivated.

Applying an external voltage to the On/Off Control when no input power is

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

+VOUT

+VIN

+SENSE

1Mꢁ

5-20

TURNS

ON/OFF

CONTROL

LOAD

TRIM

–SENSE

–VOUT

Trimming Output Voltage

UWE converters have a trim capability that allows users to adjust the output

voltages. Adjustments to the output voltages can be accomplished via a trim pot

(Figure 6) or a single ﬁxed resistor as shown in Figures 7 and 8. A single ﬁxed

resistor can increase or decrease the output voltage depending on its connec-

tion. The resistor should be located close to the converter and have a TCR less

than 100ppm/°C to minimize sensitivity to changes in temperature. If the trim

function is not used, leave the trim pin ﬂoating.

–VIN

Figure 6. Trim Connections Using A Trimpot

+VOUT

+VIN

+SENSE

TRIM

A single resistor connected from the Trim to the +Output, or +Sense where

applicable, will increase the output voltage in this conﬁguration. A resistor con-

nected from the Trim to the –Output, or –Sense where applicable, will decrease

the output voltage in this conﬁguration.

ON/OFF

CONTROL

LOAD

R1

–SENSE

–VOUT

Trim adjustments greater than the speciﬁed range can have an adverse

affect on the converter's performance and are not recommended. Excessive

voltage differences between V^OUTand Sense, in conjunction with trim adjust-

ment of the output voltage, can cause the overvoltage protection circuitry to

activate (see Performance Speciﬁcations for overvoltage limits). Power derating

is based on maximum output current and voltage at the converter’s output

pins. Use of trim and sense functions 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 overvoltage region. Therefore:

–VIN

Figure 7. Trim Connections To Increase Output Voltages Using a Fixed Resistor

+VOUT

+VIN

+SENSE

(V^OUTat pins) x (IOUT) <= rated output power

ON/OFF

TRIM

–SENSE

–VOUT

LOAD

CONTROL

Note: Resistor values are in k. Adjustment accuracy is subject to resistor

tolerances and factory-adjusted output accuracy. V^O= desired output voltage.

R2

Remote Sense Note: The Sense and V^OUTlines 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 –V^OUTat the DC-DC converter pins.

–VIN

Figure 8. Trim Connections To Decrease Output Voltages

UWE series converters have a sense feature to provide point of use regula-

tion, thereby overcoming moderate IR drops in pcb conductors or cabling.

The remote sense lines carry very little current and therefore require minimal

cross-sectional-area conductors. The sense 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. In cables and discrete

wiring applications, twisted pair or other techniques should be implemented.

www.murata-ps.com/support

MDC_UWE Series.E04 Page 21 of 23

UWE Series

Wide Input, Isolated

Eighth-Brick DC-DC Converters

UWE series converters will compensate for drops between the output volt-

age at the DC-DC and the sense voltage at the DC-DC provided that:

Trim Equations

3.3 Volt Output

Trim Up

Trim Down

[V^OUT(+) –VOUT(–)] –[Sense(+) –Sense (–)]  5ꢀ VOUT

Output overvoltage protection is monitored at the output voltage 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

overvoltage protection circuitry to activate (see Performance Speciﬁcations

for overvoltage limits). Power derating is based on maximum output current

and voltage at the converter’s output pins. Use of trim and sense functions can

cause output voltages to increase thereby increasing output power beyond the

UWE’s speciﬁed rating or cause output voltages to climb into the output over-

voltage region. Also, the use of Trim Up and Sense combined may not exceed

+10ꢀ of V^OUT. Therefore, the designer must ensure:

16.31

13.3(VO – 1.226)

VO – 3.3

–10.2

RT_DOWN(k ) =

R^T_UP(k ) =

3.3 – V^O

5 Volt Output

25.01

20.4(VO – 1.226)

VO – 5

–10.2

RT_DOWN(k ) =

5 – V^O

12 Volt Output

60.45

49.6(VO – 1.226)

VO – 12

–10.2

RT_DOWN(k ) =

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

12 – V^O

Contact and PCB resistance

losses due to IR drops

15 Volt Output

76.56

62.9(VO – 1.226)

VO – 15

+VOUT

+VIN

RT_DOWN(k ) =

–10.2

15 – VO

IOUT

+SENSE

24 Volt Output

Sense Current

ON/OFF

CONTROL

124.2

TRIM

–SENSE

–VOUT

101(VO – 1.226)

VO – 24

LOAD

RT_DOWN(k ) =

–10.2

24 – V^O

Sense Return

IOUT Return

–VIN

Contact and PCB resistance

losses due to IR drops

Figure 9. Remote Sense Circuit Conﬁguration

www.murata-ps.com/support

MDC_UWE Series.E04 Page 22 of 23

UWE Series

Wide Input, Isolated

Eighth-Brick DC-DC Converters

Vertical Wind Tunnel

Murata Power Solutions employs a computer controlled

custom-designed closed loop vertical wind tunnel, infrared

video camera system, and test instrumentation for accurate

airﬂow and heat dissipation 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 trans-

verse airﬂow studies are possible by rotation of this carrier

board since there are often signiﬁcant 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 turbu-

lence 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 10. Vertical Wind Tunnel

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_UWE Series.E04 Page 23 of 23


型号：	UWE-15/5-Q48P-C
厂家：	muRata
描述：	DC-DC Regulated Power Supply Module,
文件：	总23页 (文件大小：695K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

UWE-15/5-Q48P-C [MURATA]

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