UVQ-18/5.6-D24PL1-C_技术文档

UVQ Series

www.murata-ps.com

Low Proﬁle, Isolated Quarter Brick

2.5–40 Amp DC-DC Converters

PRODUCT OVERVIEW

For efﬁcient, fully isolated DC power in the small-

est space, Murata Power Solutions' UVQ series

quarter bricks offer output voltages from 1.5

to 48 Volts with currents up to 40 Amps. UVQs

operate over a wide temperature range (up to

+70°C at 200 lfm airﬂow) at full-rated power. The

optional mounting baseplate extends this to all

practical temperature ranges at full power.

UVQs achieve these impressive speciﬁcations

while delivering excellent electrical performance.

Overall noise is 35mVp-p (3.3V models) with fast

step response (down to 50μsec). These convert-

ers offer high stability even with no load and

tight output regulation. The unit is fully protected

against input over and undervoltage, output over-

current and short circuit. An on-board temperature

sensor shuts down the converter if thermal limits

are reached. Protection uses the “hiccup” (auto

restart) method.

A convenient remote On/Off control input oper-

ates by external digital logic, relay or transistor

input. To compensate for longer wiring and to

retain output voltage accuracy at the load, UVQs

include a Sense input to dynamically correct for

ohmic losses. A trim input may be connected to a

user’s adjustment potentiometer or trim resis-

tors for output voltage calibration closer than the

standard accuracy.

UVQs include industry-standard safety certiﬁca-

tions and BASIC I/O insulation provides 2250 Volt

input/output isolation. Radiation emission testing

is performed to widely-accepted EMC standards.

The UVQs may be considered as higher perfor-

mance replacements for some Murata Power

Solutions USQ models.

Typical unit

FEATURES



Standard quarter-brick package/pinout



Outputs from 1.5 to 48V up to 125W



Low proﬁle 0.42" height



24 and 48Vdc nominal inputs



Fully isolated, 2250Vdc (BASIC) insulation



Designed for RoHS-6 compliance



Output overvoltage/short-circuit protected



On/Off control, trim and sense functions



High efﬁciency to 92%



Protected against temp. and voltage limits



Designed to meet UL/IEC/EN60950-1 safety

approvals

+SENSE

(7)

+V^OUT

(8)

+V^IN

(1)

Baseplate

(9)

Optional

SWITCH

CONTROL

–V^OUT

(4)

–VIN

(3)

–SENSE

(5)

PWM

OPTO

REFERENCE &

CONTROLLER

ISOLATION

ERROR AMP

VOUT

TRIM

(6)

INPUT UNDERVOLTAGE, INPUT

OVERVOLTAGE, AND OUTPUT

OVERVOLTAGE COMPARATORS

* Can be ordered with positive (standard) or negative (optional) polarity.

REMOTE

ON/OFF

CONTROL*

(2)

Typical conﬁguration — some models use a different topology

For full details go to

www.murata-ps.com/rohs

Figure 1. Simpliﬁed Schematic

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MDC_UVQ Models.D01 Page 1 of 25

UVQ Series

Low Proﬁle, Isolated Quarter Brick

2.5–40 Amp DC-DC Converters

PERFORMANCE SPECIFICATIONS SUMMARY AND ORDERING GUIDE

Output

Input

VIN Nom. Range IIN, No Load IIN, Full Load

Package

(Case,

R/N (mVp-p)

Regulation (Max.) ➂

Efﬁciency)

V^OUT

I^OUT

Power

Root Models

(Volts) (Amps) (Watts) Typ. Max.

Line

Load

(Volts)

24

48

24

48

24

48

24

48

24

48

24

48

24

48

24

48

(Volts)

18-36

36-75

18-36

36-75

18-36

36-75

18-36

36-75

18-36

36-75

18-36

36-75

18-36

36-75

18-36

36-75

(mA)

(Amps)

2.84

4.14

2.37

4.58

2.7

Min.

86.5%

86%

Typ.

88%

Pinout)

UVQ-1.5/40-D24P-C

UVQ-2.5/35-D24P-C

UVQ-2.5/40-D48N-C

UVQ-3.3/30-D24P-C ➁

UVQ-3.3/35-D48N-C ➁

UVQ-5/20-D24P-C

UVQ-5/20-D48N-C

UVQ-12/8-D24P-C

UVQ-12/10-D48N-C

UVQ-15/7-D24P-C

UVQ-15/7-D48N-C

UVQ-18/5.6-D24P-C

UVQ-18/6-D48N-C

UVQ-24/4.5-D24P-C

UVQ-24/4.5-D48N-C

UVQ-48/2.5-D24P-C

UVQ-48/2.5-D48N-C

1.5

40

35

40

30

35

60

87.5

100

99

30

60

0.075%

0.05%

0.1%

0.05%

0.25%

0.05%

0.1%

80

100

180

130

180

80

88%

2.5

60

87%

88%

35

65

88.5%

87%

90%

3.3

5

115.5

40

0.05%

0.1%

89%

30

20

50

4.53

2.31

4.4

91%

92%

20

100

25

88.5%

89%

90%

8

96

95

130

160

150

185

100

130

200

375

90

91%

12

15

18

24

48

10

120

110

85

0.075%

0.05%

0.075%

0.1%

0.05%

0.02%

0.075%

0.15%

0.25%

0.2%

60

2.78

4.85

2.39

4.69

2.5

88.5%

90%

C59, P32

103

60

90.3%

91.5%

89.5%

90%

7

105

120

125

60

5.6

6

100.8

140

80

88%

88.3%

88%

108

120

45

5.03

2.49

4.4

89.5%

90.5%

91%

4.5

2.5

75

45

89%

100

250

45

89%

0.175%

0.2%

30

2.71

91%

92.3%

Output capacitors are 1uF ceramic || 10 uF electrolytic. Input cap is 22 uF, low

ESR, except UVQ-24/4.5 is 33uF and UVQ-48/2.5 uses no input cap. I/O caps are

necessary for our test equipment and may not be needed for your application.



These are partial model numbers. Please refer to the full model number struc-

ture for complete ordering part numbers.





Min. I^OUT= 3 Amps for UVQ-3.3 Vout models.



I^OUT= 14 Amps max. with VIN = 18-19.5 Volts.

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

wise noted. See detailed speciﬁcations.

Model UVQ-31128-C is a standard model UVQ-5/20-D48NB-C with modiﬁed rise time to reach 4.75V within 10 mSec. All other speciﬁcations are as per the

standard product.

UVQ Pin 9 Baseplate Connection

The UVQ series may include an optional installed baseplate for extended

thermal management. Various UVQ models (see list below) are also available

with an additional pin 9 on special order which connects to the baseplate but is

electrically isolated from the rest of the converter. Please refer to the mechani-

cal drawings.

Models available with Pin 9:

UVQ-12/10-D48

UVQ-1.5/40-D24

Models which are NOT available with Pin 9:

UVQ-5/20-D24 and –D48

UVQ-3.3/30-D24

Pin 9 offers a positive method of controlling the electrical potential of the

baseplate, independent of the converter. Some baseplate models cannot

include pin 9 and in such cases, the baseplate is grounded by the mounting

bolts. Or consider adding an external lugged washer with a grounding terminal.

UVQ-3.3/35-D48

UVQ-2.5/35-D24

UVQ-2.5/40-D48

The baseplate may be ordered by adding a “B” to the model number tree

and pin 9 will be pre-installed by adding a “9”. The two options are separate.

Please refer to the Ordering Guide. Do not order pin 9 without the baseplate.

Note that “pin 9” converters may be on limited forecast, requiring minimum

order quantities and scheduled deliveries.

Other models which are not listed will be reviewed for future pin 9 accomo-

dation.

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MDC_UVQ Models.D01 Page 2 of 25

UVQ Series

Low Proﬁle, Isolated Quarter Brick

2.5–40 Amp DC-DC Converters

PART NUMBER STRUCTURE

U VQ - 3.3 20 D48 N B 9 LX C

/

-

RoHS-6 hazardous substance compliant

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

Output Conﬁguration

U = Unipolar/Single

Alternate Pin Length:

(special quantity order)

Blank = Standard pin length

L1 = 0.110 (2.79mm)

L2 = 0.145 (3.68mm)

Quarter-Brick Package

Nominal Output Voltage

1.2 to 48 Volts

Baseplate Pin 9, see Mechanical Drawings: (special order)

Blank = No pin 9, standard

9 = Pin 9 installed (see description on pg. 2), optional

Maximum Rated Output

Current in Amps

Blank = No baseplate, standard

B = Baseplate installed, optional special order

Input Voltage Range:

* Note:

Some model number combinations may not be

available. Contact Murata Power Solutions.

D24 = 18-36 Volts (24V nominal)

D48 = 36-75 Volts (48V nominal)

Remote On/Off Control Logic:

Add "P" for positive logic

Add "N" for negative logic

Positive "P" logic is standard for D24 models and

optional special order for D48 models. Negative "N"

logic is standard for D48 models and optional special

order for D24 models.

ORDERING GUIDE SUMMARY

Model

All Models

VOUT Range

1.2V to 48V

IOUT Range

2.5A to 40A

VIN Range

18-36V or 36-75V

Efﬁciency

Up to 92.%, model dependent

INPUT CHARACTERISTICS

Parameter

Typ. @ 25°C, full load

18-36 or 36-75 Volts

Up to 5.6 Amps

Notes

Voltage Range

24V or 48V nominal

Model dependent

Current, full power

Isolation

2kVdc to 2250V

Model dependent

Remote On/Off Control

Switch or FET control

Positive or negative logic

OUTPUT CHARACTERISTICS

Parameter

Voltage

Current

Accuracy

Ripple & Noise (to 20MHz)

Line and Load Regulation

Overcurrent Protection

Overtemperature Protection

Efﬁciency (minimum)

Typ. @ 25°C, full load

1.5 to 48 Volts 10%

2.5 to 40 Amps fullscale

Down to 1% of V^NOM

Down to 35mVp-p

Down to 0.125%/ 0.25%

150% of IOUT max.

+125°C

Notes

Trimmable

No minimum load

Most models

Model dependent

With hiccup auto-restart

See Performance Speciﬁcations

GENERAL SPECIFICATIONS

Parameter

Typ. @ 25°C, full load

Down to 50ꢀsec

Notes

Dynamic Load Response

Operating Temperature Range

Safety

Model dependent

–40 to +110°C

With baseplate, see derating curve

and CSA C22.2-No.234

UL/IEC/EN 60950-1

MECHANICAL CHARACTERISTICS

With baseplate

Without baseplate

1.45 x 2.30 x 0.5 inches (36.83 x 58.42 x 12.7 mm)

1.45 x 2.30 x 0.42 inches (36.83 x 58.42 x 10.67 mm)

See Performance Speciﬁcations, page 2

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MDC_UVQ Models.D01 Page 3 of 25

UVQ Series

Low Proﬁle, Isolated Quarter Brick

2.5–40 Amp DC-DC Converters

Performance/Functional Speciﬁcations 24V Models

Typical @ TA = +25°C under nominal line voltage, nominal output voltage, natural air convection, external caps and full-load conditions, unless noted. (1)

Input

Input voltage range

See ordering guide

17

Start-up threshold, (V) min.

17

16

17

16

17

16

Undervoltage

shutdown, (V)¹⁴

16

16.25

Overvoltage shutdown (V)

none

39

none

Reﬂected (back) ripple

current²

10-50 mA pk-pk, model dependent

Input Current

Full load conditions

Inrush transient, (A²sec)

Output short circuit, (mA)

No load, mA

See ordering guide.

0.5

40

80

0.5

0.05

50

0.5

0.1

10

90

1

0.05

50

0.05

50

320

103

50

100

180

160

140

45

30

Low line (VIN = min.),

(Amps)

3.79

5.49

6.04

5.57

5.93

6.52

6.29

6.67

3.60

Standby mode,

(Off, UV, OT shutdown)

1-4mA, model dependent

See notes.

Internal input ﬁlter type

L-C

Pi-type

L-C

Reverse polarity

protection

Remote On/Off Control⁵

Positive logic, "P" sufﬁx

(speciﬁcations are max)

OFF = Ground pin to +0.8V

ON = Open or +5V to +VIN max.

Negative logic, "N" sufﬁx

(speciﬁcations are max)

OFF = Open or +5V to +VIN max

ON = Ground pin to+0.8V max

Current

1-8 mA, model dependent

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MDC_UVQ Models.D01 Page 4 of 25

UVQ Series

Low Proﬁle, Isolated Quarter Brick

2.5–40 Amp DC-DC Converters

Performance/Functional Speciﬁcations 24V Models

Typical @ TA = +25°C under nominal line voltage, nominal output voltage, natural air convection, external caps and full-load conditions, unless noted. (1)

Output

Voltage output range

See ordering guide.

1.25% of VNOM

–20 to +10% of VNOM.

Voltage output accuracy

(50% load)

1.5% of V^NOM

1% of VNOM

Adjustment range

10% of VNOM.

Temperature coefﬁcient

Minimum loading

0.02% of VOUT range per °C

No minimum load

3 amps

No minimum load

Remote sense

compensation

+10%.

Ripple/noise

See ordering guide.

Line/Load regulation

Efﬁciency

Maximum capacitive

loading, Low ESR

<0.02Ω max.,

10,000

5000

4700

2200

resistive load, (ꢀF)

Current limit inception

(98% of V^OUT, after

warmup), (Amps)

45

44

36

24

10

9.5

7.2

5.8

5

3.4

2.8

Short circuit protection

method

Current limiting, hiccup autorestart. Remove overload for recovery.

1.5 15 mA

Short circuit current,

(Amps)

3.6

3

Short circuit duration

Output may be shorted continuously to ground (no damage).

14.4 Volts

Overvoltage protection, (via

magnetic feedback)

2.3 Volts

3 Volts max 4 Volts max 6.8 Volts max

18.5 Volts 22 Volts max 29 Volts max 59 Volts max

max

Isolation Characteristics

Isolation Voltage

Input to Output, (Volts min)

Input to baseplate

2000

1500

Baseplate to output,

(Volts min)

1500

1000

1500

Isolation resistance

100 Mꢁ

1000

Isolation capacitance, (pF)

Isolation safety rating

1500

2000

50

Basic insulation

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MDC_UVQ Models.D01 Page 5 of 25

UVQ Series

Low Proﬁle, Isolated Quarter Brick

2.5–40 Amp DC-DC Converters

Performance/Functional Speciﬁcations 24V Models

Typical @ TA = +25°C under nominal line voltage, nominal output voltage, natural air convection, external caps and full-load conditions, unless noted. (1)

Dynamic characteristics

100 μSec to 150 μSec to 150 μSec to 100 μSec to

1% 1.5% 1.5% 1.5% of ﬁnal to 1%

of ﬁnal value of ﬁnal value of ﬁnal value

50 μSec

40 μSec to 50 μSec to 100 μSec

1.25% 1% to 1%

100 μSec

to 1%

Dynamic load response

(50-75-50% load step)

value

of ﬁnal value of ﬁnal value of ﬁnal value of ﬁnal value of ﬁnal value

Start-up time

V^INto VOUT regulated, mSec

Remote On/Off to VOUT

regulated, mSec

90msec

50msec

200msec

40msec

30msec

290msec

100msec

50msec

600

200msec

360

30msec

25msec

242

35msec

200msec

290 30

100msec

250 25

Switching frequency, (KHz) 380 30

500 to 650

290 30

240 25

Environmental

Calculated MTBF⁴

TBD

Operating temperature

range: see Derating

Curves.

−40 to +85°C (with Derating, see Note 15.)

−40 to +115

Operating temperature,

with baseplate, no

derating required (°C)³

−40 to +110

Storage temperature (°C)

−55 to +130

−55 to +125

Thermal protection/

shutdown

+110 to 125°C, model dependent

To +85°C/85%, non-condensing

Relative humidity

Physical

Outline dimensions

Baseplate material

Pin material

See mechanical specs.

Aluminum

Copper alloy

Pin diameter

0.040/0.062 inches (1.016/1.575 mm)

1.55 ounce

(44 grams)

Weight

1 ounce (28 grams)

Electromagnetic

interference

(conducted and

radiated)

Designed to meet FCC part 15, class B, EN55022

(external ﬁlter required)

Safety

Designed to meet UL/cUL 60950-1, CSA C22.2 No.60950-1, IEC/EN 60950-1

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MDC_UVQ Models.D01 Page 6 of 25

UVQ Series

Low Proﬁle, Isolated Quarter Brick

2.5–40 Amp DC-DC Converters

Performance/Functional Speciﬁcations 48V Models

Typical @ TA = +25°C under nominal line voltage, nominal output voltage, natural air convection, external caps and full-load conditions, unless noted. (1)

Input

Input voltage range

See ordering guide

Start-up threshold, min (V)

35

34.5

34

34.5

35

Undervoltage

shutdown, (V)¹⁴

33.5

32

33.5

Overvoltage shutdown (V)

none

Reﬂected (back) ripple

current

10-50 mA pk-pk, model dependent

Input Current

Full load conditions

Inrush transient, (A²sec)

Output short circuit, (mA)

No load, mA

See ordering guide.

0.05

50

1

0.05

30

1

0.05

250

45

0.05

50

10

60

50

80

100

130

80

30

Low line (VIN = min.),

(Amps)

3.15

3.56

3.07

3.72

3.21

3.35

3.30

3.60

Standby mode,

(Off, UV, OT shutdown)

1-4mA, model dependent

See notes.

Internal input ﬁlter type

L-C

Pi-type

L-C

Reverse polarity

protection

Remote On/Off Control⁵

Positive logic, "P" sufﬁx

(speciﬁcations are max)

OFF = Ground pin to +0.8V

ON = Open or +5V to +VIN max

Negative logic, "N" sufﬁx

(speciﬁcations are max)

OFF = Open or +5V to +VIN max

ON = Ground pin to+0.8V max

Current

1-8 mA, model dependent

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MDC_UVQ Models.D01 Page 7 of 25

UVQ Series

Low Proﬁle, Isolated Quarter Brick

2.5–40 Amp DC-DC Converters

Performance/Functional Speciﬁcations 48V Models

Typical @ TA = +25°C under nominal line voltage, nominal output voltage, natural air convection, external caps and full-load conditions, unless noted. (1)

Output

Voltage output range

See ordering guide.

1.25% of VNOM

Voltage output accuracy

(50% load)

1.5% of V^NOM

1% of VNOM

Adjustment range

–20 to +10% of VNOM.

0.02% of VOUT range per °C

+10% of VNOM.

Temperature coefﬁcient

No minimum

load

No minimum

load

Minimum loading

3 Amps

No minimum load

Remote sense

compensation

+10%.

Ripple/noise

See ordering guide.

Line/Load regulation

Efﬁciency

Maximum capacitive

loading, Low ESR

<0.02Ω max.,

10,000

48

4700

2200

1000

3.3

resistive load, (ꢀF)

Current limit inception

(98% of V^OUT, after

warmup), (Amps)

46

26

12.5

8.5

7

6.5

3

Short circuit protection

method

Current limiting, hiccup autorestart. Remove overload for recovery.

Short circuit current,

(Amps)

5

0.1

1.5

3

3.5

Short circuit duration

Output may be shorted continuously to ground (no damage).

Overvoltage protection, (via

magnetic feedback)

3 Volts max

4 Volts max

6 Volts max 14.4 Volts max 18.5 Volts max 22 Volts max 29 Volts max 55 Volts max

Isolation Characteristics

Isolation Voltage

Input to Output, (Volts min)

Input to baseplate

2250

1500

Baseplate to output,

(Volts min)

1500

Isolation resistance

100 Mꢁ

Isolation capacitance, (pF)

Isolation safety rating

1500

1000

Basic insulation

50

1500

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MDC_UVQ Models.D01 Page 8 of 25

UVQ Series

Low Proﬁle, Isolated Quarter Brick

2.5–40 Amp DC-DC Converters

Performance/Functional Speciﬁcations 48V Models

Typical @ TA = +25°C under nominal line voltage, nominal output voltage, natural air convection, external caps and full-load conditions, unless noted. (1)

Dynamic characteristics

150 μSec to

1.5%

of ﬁnal value of ﬁnal value of ﬁnal value

150 μSec to

1.5%

90 μSec

to 2%

100 μSec

to 1%

of ﬁnal value of ﬁnal value

75 μSec

to 1%

Dynamic load response

(50-75-50% load step)

50 μSec to 1%50 μSec to 1%50 μSec to 1%

of ﬁnal value of ﬁnal value of ﬁnal value

Start-up time

VIN to VOUT regulated, mSec

Remote On/Off to VOUT

regulated, mSec

50msec

40msec

30msec

100msec

50msec

600

50msec

600

50msec

30msec

100msec

290 30

50msec

Switching frequency, (KHz)

450 50

290 30

245 20

240 25

540 40

Environmental

Calculated MTBF⁴

TBD

−40 to +85°C (with Derating, see Note 15.)

Operating temperature

range: see Derating

Curves.

Operating temperature,

with baseplate, no

−40 to +110

−40 to +115 −40 to +110 −40 to +110 −40 to +120

−55 to +125

derating required (°C)³

Storage temperature (°C)

Thermal protection/

shutdown

+110 to 125°C, model dependent

To +85°C/85%, non-condensing

Relative humidity

Physical

Outline dimensions

Baseplate material

Pin material

Pin diameter

Weight

See mechanical specs.

Aluminum

Copper alloy

0.040/0.062 inches (1.016/1.575 mm)

1 ounce (28 grams)

Electromagnetic

interference

(conducted and

radiated)

Designed to meet FCC part 15, class B, EN55022

(external ﬁlter required)

Safety

Designed to meet UL/cUL 60950-1, CSA C22.2 No.60950-1, IEC/EN 60950-1

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MDC_UVQ Models.D01 Page 9 of 25

UVQ Series

Low Proﬁle, Isolated Quarter Brick

2.5–40 Amp DC-DC Converters

TYPICAL PERFORMANCE DATA

UVQ-1.5/40-D24N: Maximum Current Temperature Derating

(No baseplate, VIN = 24V, transverse air flow)

UVQ-1.5/40-D24N: Maximum Current Temperature Derating

(With baseplate, VIN = 24V, transverse air flow)

40

39

40

39

38

37

36

35

34

33

Natural convection

38

Natural convection

100 lfm

37

200 lfm

100 lfm

36

35

34

33

200 lfm

400 lfm

20

25

30

35

40

45

50

55

60

65

70

75

80

85

20

25

30

35

40

45

50

55

60

65

70

75

80

85

Ambient Temperature (oC)

UVQ-2.5/40-D48

Power Dissipation vs. Load Current @ 25°C

UVQ-2.5/40-D48N

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

16

92

88

84

80

76

72

68

64

62

14

12

10

8

V

IN = 48V

V

IN = 36V

6

V

IN = 48V

4

V

IN = 75V

2

0

5

10

15

20

25

30

35

40

0

5

10

15

20

25

30

35

40

Load Current (Amps)

UVQ-3.3/30-D24N: Maximum Current Temperature Derating

(No baseplate, V^IN= 24V, transverse air flow at sea level)

(With baseplate, V^IN= 24V, transverse air flow at sea level)

30

29

28

27

26

25

24

23

22

21

20

19

18

17

30

29

28

27

26

25

24

23

22

21

Natural convection

100 lfm

200 lfm

300 lfm

100 lfm

200 lfm

300 lfm

400 lfm

20

25

30

35

40

45

50

55

60

65

70

75

80

85

20

25

30

35

40

45

50

55

60

65

70

75

80

85

Ambient Temperature (oC)

www.murata-ps.com/support

MDC_UVQ Models.D01 Page 10 of 25

UVQ Series

Low Proﬁle, Isolated Quarter Brick

2.5–40 Amp DC-DC Converters

TYPICAL PERFORMANCE DATA

UVQ-3.3/35-D48 Maximum Current Temperature Derating

(With baseplate, VIN = 48V, transverse air flow at sea level)

UVQ-5/20-D24P

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

36

34

32

30

28

94

93

92

91

90

89

88

87

86

85

84

VIN = 18V

VIN = 24V

VIN = 30V

VIN = 36V

Natural Convection

26

100 lfm

200 lfm

24

22

300 lfm

20

400 lfm

18

20

25

30

35

40

45

50

55

60

65

70

75

80

85

Ambient Temperature (oC)

5

6.5

8

9.5

11

12.5

14

15.5

17

18.5

20

Load Current (Amps)

UVQ-5/20-D24

Power Dissipation vs. Load Current @ +25°C

10

9

8

7

6

5

4

3

2

1

V

IN = 18V

V

IN = 24V

IN = 30V

V

IN = 36V

5

6.5

8

9.5

11

12.5

14

15.5

17

18.5

20

Load Current (Amps)

UVQ-5/20-D24P: Maximum Current Temperature Derating

UVQ-5/20-D24PB: Maximum Current Temperature Derating

(No baseplate, VIN = 24V, transverse air flow)

(With baseplate, VIN = 24V, transverse air flow)

20

19.5

19

20

19.5

19

18.5

18

18.5

18

Natural convection

100 lfm

17.5

17

200 lfm

300 lfm

400 lfm

17.5

17

Natural convection

100 lfm

16.5

16

200 lfm

300 lfm

400 lfm

15.5

15

16.5

16

14.5

14

15.5

20

25

30

35

40

45

50

55

60

65

70

75

80

85

20

25

30

35

40

45

50

55

60

65

70

75

80

85

Ambient Temperature (oC)

www.murata-ps.com/support

MDC_UVQ Models.D01 Page 11 of 25

UVQ Series

Low Proﬁle, Isolated Quarter Brick

2.5–40 Amp DC-DC Converters

TYPICAL PERFORMANCE DATA

UVQ-5/20-D48P: Maximum Current Temperature Derating

(No baseplate, VIN = 48V, transverse air flow at sea level)

UVQ-5/20-D48

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

21

20

19

18

17

16

15

14

13

12

92

88

84

80

76

72

68

64

62

100 lfm

200 lfm

300 lfm

V

IN = 36V

400 lfm

V

IN = 48V

Natural convection

V

IN = 75V

20

25

30

35

40

45

50

55

60

65

70

75

80

85

Ambient Temperature (oC)

0

2

4

6

8

10

12

14

16

18

20

Load Current (Amps)

UVQ-5/20-D48PB: Maximum Current Temperature Derating

(With baseplate, V^IN= 48V, transverse air flow at sea level)

UVQ-12/8-D24P

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

21

20

19

18

17

16

15

14

13

95

90

85

80

75

VIN = 18V

V^IN= 24V

V^IN= 30V

V^IN= 36V

100 lfm

200 lfm

300 lfm

400 lfm

20

25

30

35

40

45

50

55

60

65

70

75

80

85

0.8

1.6

2.4

3.2

4

4.8

5.6

6.4

7.2

8

Load Current (Amps)

Ambient Temperature (oC)

UVQ-12/8-D24P: Maximum Current Temperature Derating

(No baseplate, VIN = 24V, transverse air flow)

UVQ-12/10-D48N

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

8.0

7.8

7.6

7.4

7.2

7.0

6.8

92

90

88

86

84

82

80

78

VIN = 36V

VIN = 48V

VIN = 60V

VIN = 75V

100 lfm

200 lfm

300 lfm

20

25

30

35

40

45

50

55

60

65

70

75

80

85

90

Ambient Temperature (oC)

1

2

3

4

5

6

7

8

9

10

Load Current (Amps)

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MDC_UVQ Models.D01 Page 12 of 25

UVQ Series

Low Proﬁle, Isolated Quarter Brick

2.5–40 Amp DC-DC Converters

TYPICAL PERFORMANCE DATA

UVQ-12/10-D48N: Maximum Current Temperature Derating

(No baseplate, VIN = 48V, transverse air flow)

UVQ-12/10-D48N

Power Dissipation vs. Load Current @ +25°C

10

9

15

13

11

9

VIN = 75V

8

V^IN= 60V

VIN = 48V

V^IN= 36V

7

Natural convection

100 lfm

5

200 lfm

300 lfm

6

3

400 lfm

1

5

1

2

3

4

5

6

7

8

9

10

20

25

30

35

40

45

50

55

60

65

70

75

80

85

Load Current (Amps)

Ambient Temperature (oC)

UVQ-12/10-D48N: Maximum Current Temperature Derating

(With baseplate, V^IN= 48V, transverse air flow)

UVQ-15/7-D24N

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

10.0

9.5

9.0

8.5

8.0

7.5

7.0

6.5

6.0

94

92

90

88

86

84

82

80

VIN = 18V

V^IN= 24V

V^IN= 30V

V^IN= 36V

Natural convection

100 lfm

200 lfm

300 lfm

400 lfm

0.7

1.4

2.1

2.8

3.5

4.2

4.9

5.6

6.3

7

20

25

30

35

40

45

50

55

60

65

70

75

80

85

Load Current (Amps)

Ambient Temperature (oC)

UVQ-15/7-D24N: Maximum Current Temperature Derating

(No baseplate, VIN = 24V, transverse air flow)

UVQ-15/7-D24N

Power Dissipation vs. Load Current @ +25°C

7.5

13

7

6.5

6

11

9

VIN = 36V

V^IN= 30V

V^IN= 24V

V^IN= 18V

7

5.5

5

Natural convection

100 lfm

5

200 lfm

300 lfm

400 lfm

3

4.5

4

1

20

25

30

35

40

45

50

55

60

65

70

75

80

85

90

0.7

1.4

2.1

2.8

3.5

4.2

4.9

5.6

6.3

7

Load Current (Amps)

Ambient Temperature (oC)

www.murata-ps.com/support

MDC_UVQ Models.D01 Page 13 of 25

UVQ Series

Low Proﬁle, Isolated Quarter Brick

2.5–40 Amp DC-DC Converters

TYPICAL PERFORMANCE DATA

UVQ-15/7-D24N: Maximum Current Temperature Derating

(With baseplate, VIN = 24V, transverse air flow)

UVQ-15/7-D48N

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

7.5

7

94

92

90

88

86

84

82

80

78

76

6.5

VIN = 36V

VIN = 48V

VIN = 60V

VIN = 75V

6

Natural convection

100 lfm

200 lfm

300 lfm

400 lfm

5.5

5

4.5

4

0.7

1.4

2.1

2.8

3.5

4.2

4.9

5.6

6.3

7

20

25

30

35

40

45

50

55

60

65

70

75

80

85

90

Load Current (Amps)

Ambient Temperature (oC)

UVQ-15/7-D48N: Maximum Current Temperature Derating

(No baseplate, VIN = 48V, transverse air flow)

UVQ-15/7-D48N

Power Dissipation vs. Load Current @ +25°C

11

7.0

6.8

6.6

6.4

6.2

6.0

5.8

5.6

5.4

5.2

5.0

4.8

4.6

4.4

4.2

4.0

10

9

8

7

6

5

4

3

2

1

VIN = 75V

VIN = 60V

VIN = 48V

VIN = 36V

Natural convection

100 lfm

200 lfm

300 lfm

400 lfm

0.7

1.4

2.1

2.8

3.5

4.2

4.9

5.6

6.3

7

20

25

30

35

40

45

50

55

60

65

70

75

80

85

90

Load Current (Amps)

Ambient Temperature (oC)

UVQ-15/7-D48N: Maximum Current Temperature Derating

(With baseplate, V^IN= 48V, transverse air flow)

UVQ-18/5.6-D24

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

92

7.0

6.8

6.6

6.4

6.2

6.0

5.8

5.6

5.4

5.2

5.0

4.8

4.6

4.4

4.2

4.0

90

88

86

84

82

80

78

76

Natural convection

100 lfm

VIN = 18V

VIN = 24V

200 lfm

300 lfm

VIN = 36V

0.56

1.12

1.68

2.24

2.8

3.36

3.92

4.48

5.04

5.6

Load Current (Amps)

20

25

30

35

40

45

50

55

60

65

70

75

80

85

90

Ambient Temperature (oC)

www.murata-ps.com/support

MDC_UVQ Models.D01 Page 14 of 25

UVQ Series

Low Proﬁle, Isolated Quarter Brick

2.5–40 Amp DC-DC Converters

TYPICAL PERFORMANCE DATA

UVQ-18/5.6-D24: Maximum Current Temperature Derating

(No baseplate, V^IN= 24V, transverse air flow)

UVQ-18/5.6-D24: Maximum Current Temperature Derating

(With baseplate, V^IN= 24V, transverse air flow)

5.8

5.6

5.4

5.8

5.6

5.4

5.2

5

200 lfm

5.2

5

300 lfm

4.8

100 lfm

400 lfm

Natural

Convection

4.6

100 lfm

4.8

4.6

4.4

4.2

4

4.4

4.2

200 lfm

300 lfm

4

3.8

3.6

3.4

Natural

Convection

400 lfm

20

25

30

35

40

45

50

55

60

65

70

75

80

85

20

25

30

35

40

45

50

55

60

65

70

75

80

85

Ambient Temperature (oC)

UVQ-18/6-D48

Power Dissipation vs. Load Current @ 25°C

UVQ-18/6-D48N

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

16

14

12

10

8

95

90

85

80

75

70

65

60

V

IN = 75V

V

IN = 48V

V

IN = 36V

V

IN = 36V

6

V

IN = 48V

4

V

IN = 75V

2

0

0.6

1.2

1.8

2.4

3

3.6

4.2

4.8

5.4

6

0.6

1.2

1.8

2.4

3

3.6

4.2

4.8

5.4

6

Load Current (Amps)

UVQ-18/6-D48: Maximum Current Temperature Derating

(No baseplate, V^IN= 48V, transverse air flow)

(With baseplate, V^IN= 48V, transverse air flow)

6.5

6

6.5

6

5.5

5

5.5

5

100 lfm

200 lfm

300 lfm

500 lfm

4.5

4

4.5

4

200 lfm

300 lfm

500 lfm

3.5

20

25

30

35

40

45

50

55

60

65

70

75

80

85

20

25

30

35

40

45

50

55

60

65

70

75

80

85

Ambient Temperature (oC)

www.murata-ps.com/support

MDC_UVQ Models.D01 Page 15 of 25

UVQ Series

Low Proﬁle, Isolated Quarter Brick

2.5–40 Amp DC-DC Converters

TYPICAL PERFORMANCE DATA

UVQ-24/4.5-D24N

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

91

90

89

88

87

86

85

84

83

82

81

80

VIN = 18V

VIN = 24V

VIN = 30V

VIN = 36V

1.00

1.35

1.70

2.05

2.40

2.75

3.10

3.45

3.80

4.15

4.50

Load Current (Amps)

UVQ-24/4.5-D24P: Maximum Current Temperature Derating

(No baseplate, Vin= 24V, air flow is from Pin 1 to Pin 3)

(With baseplate, Vin= 24V, air flow is from Pin 1 to Pin 3)

4.50

4.25

4.00

3.75

3.50

3.25

3.00

2.75

2.50

4.25

4.00

3.75

3.50

3.25

3.00

2.75

2.50

400 LFM

300 LFM

200 LFM

100 LFM

LOW LFM

400 LFM

300 LFM

200 LFM

100 LFM

LOW LFM

20

25

30

35

40

45

50

55

60

65

70

75

80

85

20

25

30

35

40

45

50

55

60

65

70

75

80

85

Ambient Temperature (oC)

UVQ-24/4.5-D48N: Maximum Current Temperature Derating

(No baseplate, V^IN= 48V, transverse air flow)

UVQ-24/4.5-D48N

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

92

90

88

86

84

82

80

78

76

74

72

70

68

66

64

4.5

4.3

4.0

3.8

3.5

3.3

3.0

400 lfm

300 lfm

200 lfm

100 lfm

VIN = 36V

VIN = 48V

VIN = 60V

VIN = 75V

20

25

30

35

40

45

50

55

60

65

70

75

80

85

90

1.00 1.35 1.70 2.05 2.40 2.75 3.10 3.45 3.80 4.15 4.50

Ambient Temperature (oC)

Load Current (Amps)

www.murata-ps.com/support

MDC_UVQ Models.D01 Page 16 of 25

UVQ Series

Low Proﬁle, Isolated Quarter Brick

2.5–40 Amp DC-DC Converters

TYPICAL PERFORMANCE DATA

UVQ-48/2.5-D48N: Maximum Current Temperature Derating

(With baseplate, V^IN= 48V, transverse air flow)

UVQ-48/2.5-D48N

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

2.6

2.5

2.4

2.3

2.2

2.1

2.0

93

92

91

90

Natural convection

100 lfm

V

IN = 36V

89

88

87

86

85

200 lfm

V

IN = 48V

VIN = 60V

20

25

30

35

40

45

50

55

60

65

70

75

80

85

VIN = 75V

Ambient Temperature (oC)

0.25

0.5

0.75

1

1.25

1.5

1.75

2

2.25

2.5

Load Current (Amps)

www.murata-ps.com/support

MDC_UVQ Models.D01 Page 17 of 25

UVQ Series

Low Proﬁle, Isolated Quarter Brick

2.5–40 Amp DC-DC Converters

MECHANICAL SPECIFICATIONS

Case C59

Case C59 with Baseplate

2.30 (58.4)

1.860 (47.2)

A

0.42

(10.7)

1.030

1.45

(26.2) (36.8)

PINS 1-3, 5-7: 0.040 0.002 (1.016 0.05)

PINS 4 & 8: 0.062 0.002 (1.575 0.05)

0.188

(4.78)

2.00 (50.8)

A

BASEPLATE

#M3-THREAD X 0.15 DEEP

TYPICAL (4) PLACES

3

2

1

4

5

6

7

8

0.600

(15.24)

4 EQ. SP.

@ 0.150

(3.81)

1.45

(36.8)

0.50

(12.7)

PINS 1-3, 5-7: 0.040 0.002 (1.016 0.05)

PINS 4 & 8: 0.062 0.002 (1.575 0.05)

0.188

(4.8)

BOTTOM VIEW

Alternate pin lengths are available. Contact Murata Power Solutions.

2.30 (58.4)

2.00 (50.8)

A

Optional baseplate pin

is special order.

Contact Murata Power Solutions..

0.15 (3.81)

3

9

4

5

0.600 (15.24)

4 EQ. SP.

@ 0.150 (3.81)

Optional pin 9 connects

to baseplate. Electrically

isolated from converter.

6

2

1

7

8

BOTTOM VIEW

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

DOSA-Compliant

I/O Connections

Function P32

+Vin

Third Angle Projection

Important: If sense inputs are not

1

connected to a remote load, connect

them to their respective V^OUTpins at

the converter.

2

On/Off Control

–Vin

3

4

–Vout

Tolerances (unless otherwise speciﬁed):

.XX 0.02 (0.5)

.XXX 0.010 (0.25)

Angles 2ꢂ

5

–Sense

6

Trim

7

+Sense

8

+Vout

Components are shown for reference only.

www.murata-ps.com/support

MDC_UVQ Models.D01 Page 18 of 25

UVQ Series

Low Proﬁle, Isolated Quarter Brick

2.5–40 Amp DC-DC Converters

ABSOLUTE MAXIMUM RATINGS

TECHNICAL NOTES

Removal of Soldered UVQs from Printed Circuit Boards

Should removal of the UVQ from its soldered connection be needed, thoroughly

de-solder the pins using solder wicks or de-soldering tools. At no time should

any prying or leverage be used to remove boards that have not been properly

de-soldered ﬁrst.

Input Voltage

Continuous

Transient (100 mS)

24V models

0 to +36V

+50V

48V models

0 to +75V

+100V

On/Off Control

–0.3 V min to +13.5V max.

See Fuse section

Input Reverse Polarity Protection

Output Overvoltage

Input Source Impedance

V^OUT+20% max.

UVQ 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. 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 optimum performance, components should be mounted close to

the DC-DC converter.

Output Current (Note 7)

Current-limited. Devices can withstand

sustained short circuit without damage.

Storage Temperature

Lead Temperature

–55 to +125°C

See soldering guidelines

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/Func-

tional Speciﬁcations Table is not implied nor recommended.

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

All models in the UVQ Series are tested/speciﬁed for input ripple current (also

called input reﬂected ripple current) and output noise using the circuits and

layout shown in Figures 2 and 3.

(1) All models are tested and speciﬁed with 200 LFM airﬂow, external 1||10μF ceramic/

tantalum output capacitors. External input capacitance varies according to model type.

All capacitors are low ESR types. These capacitors are necessary to accommodate

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

applications. All models are stable and regulate within spec under no-load conditions.

General conditions for Speciﬁcations are +25°C, V^IN=nominal, VOUT = nominal, full load.

(2) Input Ripple Current is tested and speciﬁed over a 5-20MHz bandwidth. Input ﬁlter-

ing is CIN = 33μF tantalum, CBUS = 220μF electrolytic, LBUS = 12μH.

(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.

TO

CURRENT

PROBE

OSCILLOSCOPE

1

3

+VIN

–VIN

LBUS

+

–

V

IN

C

BUS

CIN

(4) Mean Time Before Failure is calculated using the Telcordia (Belcore) SR-332 Method 1,

Case 3, ground ﬁxed conditions, TPCBOARD = +25°C, full output load, natural air

convection.

C

IN = 33μF, ESR < 700mΩ @ 100kHz

BUS = 220μF, ESR < 100mΩ @ 100kHz

C

LBUS = 12μH

(5) The On/Off Control may be driven with external logic or by applying appropriate

external voltages which are referenced to Input Common. The On/Off Control Input

should use either an open collector/open drain transistor or logic gate which does

not exceed +13.5V.

Figure 2. Measuring Input Ripple Current

(6) Short circuit shutdown begins when the output voltage degrades approximately 2%

from the selected setting.

(7) The outputs are not intended to sink appreciable reverse current.

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

and Noise Reduction.

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

start” at –40°C.

External input capacitors (CIN in Figure 2) serve primarily as energy-storage

elements. They should be selected for bulk capacitance (at appropriate fre-

quencies), 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 conﬁgura-

tion may necessitate additional considerations.

(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) Overvoltage shutdown on 48V input models is not supplied in order to comply with

telecom reliability requirements. These requirements attempt continued operation

despite signiﬁcant input overvoltage.

(12) Do not exceed maximum power speciﬁcations when adjusting the output trim.

(13) Note that the converter may operate up to +110°C with the baseplate installed.

However, thermal self-protection occurs near +110°C, and there is a temperature

gradient between the hotspot and the baseplate. Therefore, +100°C is recom-

mended to avoid thermal shutdown.

(14) The converter is guaranteed to turn off at the UV shutdown voltage.

(15) At full power, the package temperature of all on-board components must not exceed

+128°C.

www.murata-ps.com/support

MDC_UVQ Models.D01 Page 19 of 25

UVQ Series

Low Proﬁle, Isolated Quarter Brick

2.5–40 Amp DC-DC Converters

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

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

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

output capacitors. Output capacitors function as true ﬁlter elements and

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

response.

On/Off Control

The primary-side, Remote On/Off Control function (pin 2) can be speciﬁed to

operate with either positive or negative logic. Positive-logic devices ("P" sufﬁx)

are enabled when pin 2 is left open or is pulled high. Positive-logic devices are

disabled when pin 2 is pulled low. Negative-logic devices are off when pin 2 is

high/open and on when pin 2 is pulled low. See Figure 4.

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 be taken into consideration. OS-CON^TMorganic

semiconductor capacitors (www.sanyo.com) can be especially effective for

further reduction of ripple/noise. 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.

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

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

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

(see Performance Speciﬁcations) when activated and withstand appropriate

voltage when deactivated.

EQUIVALENT CIRCUIT FOR

POSITIVE AND NEGATIVE

LOGIC MODELS

+Vcc

+VIN

1

2

7

+SENSE

8

+VOUT

ON/OFF

CONTROL

RLOAD

SCOPE

C1

C2

REF

4

5

–VOUT

3

–VIN

COMMON

–SENSE

Figure 4. Driving the Remote On/Off Control Pin

C1 = 1μF

C2 = 10μF

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

Current Limiting (Power limit with current mode control)

Figure 3. Measuring Output Ripple/Noise (PARD)

As power demand increases on the output and enters the speciﬁed “limit

inception range” (current in voltage mode and power in current mode) limiting

circuitry activates in the DC-DC converter to limit/restrict the maximum current

or total power available. In voltage mode, current limit can have a “constant or

foldback” characteristic. In current mode, once the current reaches a certain

range the output voltage will start to decrease while the output current con-

tinues to increase, thereby maintaining constant power, until a maximum peak

current is reached and the converter enters a “hic-up” (on off cycling) mode of

operation until the load is reduced below the threshold level, whereupon it will

return to a normal mode of operation. Current limit inception is deﬁned as the

point where the output voltage has decreased by a pre-speciﬁed percentage

(usually a 2% decrease from nominal).

Start-Up Threshold and Undervoltage Shutdown

Under normal start-up conditions, the UVQ Series will not begin to regulate

properly until the ramping input voltage exceeds the Start-Up Threshold.

Once operating, devices will turn off when the applied voltage drops below

the Undervoltage Shutdown point. Devices will remain off as long as the

undervoltage condition continues. Units will automatically re-start when the

applied voltage is brought back above the Start-Up Threshold. The hysteresis

built into this function avoids an indeterminate on/off condition at a single input

voltage. See Performance/Functional Speciﬁcations table for actual limits.

Short Circuit Condition (Current mode control)

Start-Up Time

The short circuit condition is an extension of the “Current Limiting” condition.

When the monitored peak current signal reaches a certain range, the PWM

controller’s outputs are shut off thereby turning the converter “off.” This is

followed by an extended time out period. This period can vary depending on

other conditions such as the input voltage level. Following this time out period,

the PWM controller will attempt to re-start the converter by initiating a “normal

start cycle” which includes softstart. If the “fault condition” persists, another

“hic-up” cycle is initiated. This “cycle” can and will continue indeﬁnitely until

such time as the “fault condition” is removed, at which time the converter

will resume “normal operation.” Operating in the “hic-up” mode during a fault

condition is advantageous in that average input and output power levels are

held low preventing excessive internal increases in temperature.

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

ramping input voltage crosses the Start-Up Threshold voltage and the point at

which the fully loaded output voltage enters and remains within its speciﬁed

1% accuracy band. Actual measured times will vary with input source imped-

ance, external input capacitance, and the slew rate and ﬁnal value of the input

voltage as it appears to the converter. The On/Off to V^OUTstart-up time assumes

that the converter is turned off via the Remote On/Off Control with the nominal

input voltage already applied.

www.murata-ps.com/support

MDC_UVQ Models.D01 Page 20 of 25

UVQ Series

Low Proﬁle, Isolated Quarter Brick

2.5–40 Amp DC-DC Converters

Thermal Shutdown

UVQ converters are equipped with thermal-shutdown circuitry. If the inter-

nal temperature of the DC-DC converter rises above the designed operating

temperature (See Performance Speciﬁcations), 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.

8

1

2

+VOUT

+VIN

7

+SENSE

6

ON/OFF

CONTROL

TRIM

–SENSE

–VOUT

LOAD

R^{TRIM DOWN}

Output Overvoltage Protection

5

4

The output voltage is monitored for an overvoltage condition via magnetic cou-

pling to the primary side. If the output voltage rises to a fault condition, which

could be damaging to the load circuitry (see Performance Speciﬁcations), the

sensing circuitry will power down the PWM controller causing the output volt-

age to decrease. Following a time-out period the PWM will restart, causing the

output voltage to ramp to its appropriate value. 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.

3

–VIN

Figure 6.Trim Connections To Decrease Output Voltages Using Fixed Resistors

On UVQs, a single resistor connected from the Trim pin (pin 6) to the +Sense

(pin 7) will increase the output voltage. A resistor connected from the Trim Pin

(pin 6) to the –Sense (pin 5) will decrease the output voltage.

Input Reverse-Polarity Protection

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

become forward biased and likely draw excessive current from the power

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

could cause permanent damage to the converter.

Trim adjustments greater than the speciﬁed +10%/–20% 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

adjustment of the output voltage, can cause the overvoltage protection circuitry

to activate (see Performance Speciﬁcations for overvoltage limits).

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 a sustained, non-current-limited, input-voltage polarity

reversal exists. For Murata Power Solutions' UVQ Series DC-DC Converters,

fast-blow fuses are recommended with values no greater than twice the

maximum input current.

Temperature/power derating is based on maximum output current and

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

cause output voltages to increase, thereby increasing output power beyond

the UVQ's speciﬁed rating, or cause output voltages to climb into the output

overvoltage region. Therefore:

Trimming Output Voltage

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

UVQ converters have a trim capability (pin 6) that enables users to adjust the

output voltage from +10% to –20% (refer to the trim equations). Adjustments

to the output voltage can be accomplished with a single ﬁxed resistor as shown

in Figures 5 and 6. A single ﬁxed resistor can increase or decrease the output

voltage depending on its connection. Resistors should be located close to

the converter and have TCR's less than 100ppm/°C to minimize sensitivity to

changes in temperature. If the trim function is not used, leave the trim pin open.

The Trim pin (pin 6) is a relatively high impedance node that can be suscep-

tible to noise pickup when connected to long conductors in noisy environments.

Soldering Guidelines

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-

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

8

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

For Sn/Ag/Cu based solders:

1

+VOUT

+VIN

7

+SENSE

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.

2

3

6

5

4

ON/OFF

CONTROL

TRIM

–SENSE

–VOUT

LOAD

7 seconds

R^{TRIM UP}

105° C.

–VIN

250° C.

6 seconds

Figure 5.Trim Connections To Increase Output Voltages Using Fixed Resistors

www.murata-ps.com/support

MDC_UVQ Models.D01 Page 21 of 25

UVQ Series

Low Proﬁle, Isolated Quarter Brick

2.5–40 Amp DC-DC Converters

Trim Equations

F E A T U R E S A N D O P T I O N S

Trim Up

Trim Down

Remote Sense

UVQ-1.5/40-D24

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 must connect the +Sense to +V^OUTand -Sense to –VOUT at the DC-DC

converter pins.

6.23(VO – 1.226)

VO – 1.5

7.64

–10.2

R^T_UP(k) =

RT_DOWN(k) =

1.5 – V^O

UVQ-2.5/40-D48, UVQ-2.5/35-D24

UVQ series converters employ a sense feature to provide point of use regu-

lation, 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, 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. In cables and discrete wiring applica-

tions, twisted pair or other techniques should be implemented.

10(VO – 1.226)

12.26

–10.2

RT_DOWN(k) =

VO – 2.5

2.5 – V^O

UVQ-3.3/35-D48

13.3(VO – 1.226)

VO – 3.3

16.31

–10.2

RT_DOWN(k) =

3.3 – V^O

UVQ-5/25-D24, UVQ-5/20-D48

UVQ series converters will compensate for drops between the output voltage

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

25.01

20.4(VO – 1.226)

–10.2

RT_DOWN(k) =

R^T_UP(k) =

5 – V^O

VO – 5

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

UVQ-12/8-D24, -12/10-D48

Contact and PCB resistance

losses due to IR drops

49.6(VO – 1.226)

VO – 12

60.45

–10.2

R^T_UP(k) =

RT_DOWN(k) =

12 – V^O

8

1

+VOUT

+VIN

IOUT

UVQ-15/7-D24, -D48

7

+SENSE

Sense Current

76.56

62.9(VO – 1.226)

2

3

ON/OFF

CONTROL

–10.2

RT_DOWN(k) =

R^T_UP(k) =

6

5

TRIM

–SENSE

–VOUT

LOAD

15 – V^O

VO – 15

Sense Return

UVQ-18/5.6-D24, -18/6-D48

IOUT Return

4

–VIN

92.9

75.5(VO – 1.226)

VO – 18

–10.2

RT_DOWN(k) =

R^T_UP(k) =

Contact and PCB resistance

losses due to IR drops

18 – V^O

UVQ-24/4.5-D24, -D48

Figure 8. Remote Sense Circuit Conﬁguration

124.2

101(VO – 1.226)

–10.2

RT_DOWN(k) =

R^T_UP(k) =

24 – VO

VO – 24

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

conveter's speciﬁed rating, or cause output voltages to climb into the output

overvoltage region. Therefore, the designer must ensure:

UVQ-48/2.5-D24, -D48

250

210.75(VO – 1.226)

VO – 48

–10.2

RT_DOWN(k) =

R^T_UP(k) =

48 – VO

Note: Higher output 24V and 48V converters require larger, low-tempco,

precision trim resistors. An alternative is a low-TC multi-turn potentiometer

(20kΩ typical) connected between +V^OUTand –VOUT with the wiper to the Trim

pin.

(V^OUTat pins) × (IOUT) ≤ rated output power

www.murata-ps.com/support

MDC_UVQ Models.D01 Page 22 of 25

UVQ Series

Low Proﬁle, Isolated Quarter Brick

2.5–40 Amp DC-DC Converters

Thermal Performance

UVQ Series Aluminum Heatsink

The HS-QB25-UVQ heatsink has a thermal resistance of 12 °C/Watt of internal

heat dissipation with “natural convection” airﬂow (no fans or other mechanical

airﬂow) at sea level altitude. This thermal resistance assumes that the heatsink

is ﬁrmly attached using the supplied thermal pad and that there is no nearby

wall or enclosure surface to inhibit the airﬂow. The thermal pad adds a negli-

gible series resistance of approximately 0.5°C/Watt so that the total assembled

resistance is 12.5°C/Watt.

The UVQ series converter baseplate can be attached either to an enclosure wall

or a heatsink to remove heat from internal power dissipation. The discus-

sion below concerns only the heatsink alternative. The UVQs are available

with a low-proﬁle extruded aluminum heatsink kit, models HS-QB25-UVQ,

HS-QB50-UVQ, and HS-QB100-UVQ. This kit includes the heatsink, thermal

mounting pad, screws and mounting hardware. See the assembly diagram

below. Do not overtighten the screws in the tapped holes in the converter (3.5

n-m or 1.9 in-oz. max.). This kit adds excellent thermal performance without

sacriﬁcing too much component height. See the Mechanical Outline Drawings

for assembled dimensions. If the thermal pad is ﬁrmly attached, no thermal

compound (“thermal grease”) is required.

Be aware that we need to handle only the internal heat dissipation, not the

full power output of the converter. This internal heat dissipation is related to the

efﬁciency as follows:

Power Dissipation [Pd] = Power In – Power Out [1]

Power Out / Power In = Efﬁciency [in %] / 100 [2]

0!. (%!$ 3#2%7

-ꢀ 8 ꢁ--

ꢂ 0,#3

Power Dissipation [Pd] = Power In x (1 –Efﬁciency%/100) [3]

Power Dissipation [Pd] = Power Out x (1 / (Efﬁciency%/100) - 1) [4]

Efﬁciency of course varies with input voltage and the total output power.

Please refer to the Performance Curves.

,/#+ 7!3(%2

-ꢀ

ꢂ 0,#3

Since many applications do include fans, here is an approximate equation to

calculate the net thermal resistance:

R [at airﬂow] = R [natural convection] / (1 + (Airﬂow in LFM) x

[Airﬂow Constant]) [5]

&,!4 7!3(%2

./ꢃ ꢂ

ꢂ 0,#3

Where,

R [at airﬂow] is the net thermal resistance (in °C/W) with the amount of

airﬂow available and,

R [natural convection] is the still air total path thermal resistance or in this

case 12.5°C/Watt and,

(%!43).+

“Airﬂow in LFM”is the net air movement ﬂow rate immediately at the converter.

This equation simpliﬁes an otherwise complex aerodynamic model but is a

useful starting point. The “Airﬂow Constant” is dependent on the fan and enclo-

sure geometry. For example, if 200 LFM of airﬂow reduces the effective natural

convection thermal resistance by one half, the airﬂow constant would be

0.005. There is no practical way to publish a “one size ﬁts all” airﬂow constant

because of variations in airﬂow direction, heatsink orientation, adjacent walls,

enclosure geometry, etc. Each application must be determined empirically and

the equation is primarily a way to help understand the cooling arithmetic.

(%!4 42!.3&%2 0!$

ꢄ0EEL OFF WHITE PLASTIC

BACKING MATERIAL BEFORE

ATTACHING TO HEATSINKꢅ

This equation basically says that small amounts of forced airﬂow are quite

effective removing the heat. But very high airﬂows give diminishing returns.

Conversely, no forced airﬂow causes considerable heat buildup. At zero airﬂow,

cooling occurs only because of natural convection over the heatsink. Natural

convection is often well below 50 LFM, not much of a breeze.

Figure 7. Model UVQ Heatsink Assembly Diagram

While these equations are useful as a conceptual aid, most users ﬁnd it

very difﬁcult to measure actual airﬂow rates at the converter. Even if you know

the velocity speciﬁcations of the fan, this does not usually relate directly to

the enclosure geometry. Be sure to use a considerable safety margin doing

thermal analysis. If in doubt, measure the actual heat sink temperature with

a calibrated thermocouple, RTD or thermistor. Safe operation should keep the

heat sink below 100°C.

When assembling these kits onto the converter, include ALL kit hardware to

assure adequate mechanical capture and proper clearances. Thread relief is

0.090" (2.3mm).

www.murata-ps.com/support

MDC_UVQ Models.D01 Page 23 of 25

UVQ Series

Low Proﬁle, Isolated Quarter Brick

2.5–40 Amp DC-DC Converters

Calculating Maximum Power Dissipation

Heat Sink Example

To determine the maximum amount of internal power dissipation, ﬁnd the

ambient temperature inside the enclosure and the airﬂow (in Linear Feet per

Minute – LFM) at the converter. Determine the expected heat dissipation using

the Efﬁciency curves and the converter Input Voltage. You should also compen-

sate for lower atmospheric pressure if your application altitude is considerably

above sea level.

Assume an efﬁciency of 92% and power output of 100 Watts. Using equation

[4], Pd is about 8.7 Watts at an input voltage of 48 Volts. Using +30°C ambient

temperature inside the enclosure, we wish to limit the heat sink temperature to

+90°C maximum baseplate temperature to stay well away from thermal shut-

down. The +90°C. ﬁgure also allows some margin in case the ambient climbs

above +30°C or the input voltage varies, giving us less than 92% efﬁciency.

The heat sink and airﬂow combination must have the following characteristics:

The general proceedure is to compute the expected temperature rise of the

heatsink. If the heatsink exceeds +100°C. either increase the airﬂow and/or

reduce the power output. Start with this equation:

8.7 W = (90-30) / R[airﬂow] or,

R[airﬂow] = 60/8.7 = 6.9°C/W

Internal Heat Dissipation [Pd in Watts] = (Ts – Ta)/R [at airﬂow] [6]

where “Ta” is the enclosure ambient air temperature and,

where “Ts” is the heatsink temperature and,

Since the ambient thermal resistance of the heatsink and pad is 12.5°C/W,

we need additional forced cooling to get us down to 6.9°C/W. Using a hypo-

thetical airﬂow constant of 0.005, we can rearrange equation [5] as follows:

(Required Airﬂow, LFM) x (Airﬂow Constant) = R[Nat.Convection] /

R[at airﬂow] –1

where “R [at airﬂow]” is a speciﬁc heat transfer thermal resistance (in

degrees Celsius per Watt) for a particular heat sink at a set airﬂow rate. We

have already estimated R [at airﬂow] in the equations above.

or, (Required Airﬂow, LFM) x (Airﬂow Constant) = 12.5/6.9 –1 = 0.81 and,

rearranging again,

Note particularly that Ta is the air temperature inside the enclosure at the

heatsink, not the outside air temperature. Most enclosures have higher internal

temperatures, especially if the converter is “downwind” from other heat-pro-

ducing circuits. Note also that this “Pd” term is only the internal heat dissipated

inside the converter and not the total power output of the converter.

(Required Airﬂow, LFM) = 0.81/0.005 = 162 LFM

162 LFM is the minumum airﬂow to keep the heatsink below +90°C.

Increase the airﬂow to several hundred LFM to reduce the heatsink tempera-

ture further and improve life and reliability.

We can rearrange this equation to give an estimated temperature rise of the

heatsink as follows:

2.28

(57.91)

Ts = (Pd x R [at airﬂow]) + Ta [7]

1.860

(47.24)

Heatsink Kit *

Model Number

Still Air (Natural convection)

thermal resistance

Heatsink height

(see drawing)

HS-QB25-UVQ

HS-QB50-UVQ

HS-QB100-UVQ

12°C/Watt

10.6°C/Watt

8°C/Watt

0.25" (6.35mm)

0.50" (12.7mm)

1.00" (25.4mm)

1.03

(26.16)

1.45

(36.83)

* Kit includes heatsink, thermal pad and mounting hardware. These are

non-RoHS models. For RoHS-6 versions, add “-C” to the model number

(e.g., HS-QB25-UVQ-C).

0.140 DIA. (3.56) (4 PLACES)

*

MATERIAL: BLACK ANODIZED ALUMINUM

0.10

(2.54)

* UVQ SERIES HEATSINKS ARE AVAILABLE IN 3 HEIGHTS:

0.25 (6.35), 0.50 (12.70) AND 1.00 (25.4)

Dimensions in inches (mm)

www.murata-ps.com/support

MDC_UVQ Models.D01 Page 24 of 25

UVQ Series

Low Proﬁle, Isolated Quarter Brick

2.5–40 Amp 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 9. 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_UVQ Models.D01 Page 25 of 25


型号：	UVQ-18/5.6-D24PL1-C
厂家：	muRata
描述：	DC-DC Regulated Power Supply Module, 1 Output, 100.8W, Hybrid, ROHS COMPLIANT, QUARTER BRICK PACKAGE-9
文件：	总25页 (文件大小：611K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

UVQ-18/5.6-D24PL1-C [MURATA]

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