UCQ-3.3-35-D48PHCY_技术文档

Single Output UCQ Models

Low-Proﬁle, Quarter Brick, 8.3-40 Amp

Isolated DC/DC Converters

Typical units

FEATURES

PRODUCT OVERVIEW

nꢀ

For applications requiring improved electrical and

thermal performance at reduced cost, consider

DATEL’s new UCQ series “quarter brick” DC/DC

power converters. These compact units measure

just 1.45" x 2.3" x 0.4" (36.8 x 60.9 x 10.2 mm)

and ﬁt the industry-standard footprint.

The UCQ’s feature full isolation to 2250Vdc

meeting BASIC insulation requirements of

Standard quarter-brick package/pinout

nꢀ

Low cost; Low proﬁle, 0.4" (10.2mm)

UL/EN/IEC 60950-1. Input ﬁlters reduce propa-

gated switching noise back to input sources. Also

included is a remote On/Off switch control (with

positive or negative polarity), output trim adjustable

over nominal and output sense functions to reduce

nꢀ

24V or 48V nominal input

nꢀ

Outputs: 1.2V to 12V

nꢀ

Interleaved synchronous-rectiﬁer topology

• Ultra high efﬁciency

• No output reverse conduction

Available outputs range between 1.2V @ 30 Amps

to 12V @ 8.3 Amps and accept a wide input range. power lead losses. Extensive protection items

The UCQ’s interleaved, synchronous-rectiﬁer

topology offers high efﬁciency (up to 93%), tight

line and load regulation, low noise and fast step

response. A single-board optimized open-frame

design contributes to impressive thermal opera-

tion. UCQ’s will operate up to +70°C and 100 LFM

airﬂow with no derating.

avoid damage from out of limit voltages, currents

and temperatures. Protection faults automatically

recover using the hiccup technique. Besides safety

testing to 60950-1, certiﬁcations for the UCQ

include application for EMC compliance (to FCC

class B), qualiﬁcation testing (including HALT) and

CE marking.

nꢀ

Outstanding thermal performance

nꢀ

On/off control, trim & sense functions

nꢀ

Fully isolated, 2250Vdc (BASIC)

Output overvoltage protection

n

nꢀ

Fully I/O protected; Thermal shutdown

nꢀ

Designed to meet UL/EN/IEC60950-1

safety approvals

+SENSE

(7)

nꢀ

Qual/HALT/EMI tested

+V^OUT

(8)

+V^IN

(3)

SWITCH

CONTROL

–V^OUT

(4)

–VIN

(1)

–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 topology may vary between units.

Figure 1. Simpliﬁed Schematic

For full details go to

www.murata-ps.com/rohs

www.murata-ps.com

Technical enquiries email: sales@murata-ps.com, tel: +1 508 339 3000

MDC_UCQ Models.B07 Page 1 of 16

Single Output UCQ Models

Low-Proﬁle, Quarter Brick, 8.3-40 Amp

Isolated DC/DC Converters

Performance Speciﬁcations and Ordering Guide ➀

ORDERING GUIDE

Output

Input

R/N (mVp-p)

Regulation (Max.) ➁

Line Load

Iin full

load

Efﬁciency

Vo u t

Io u t

Power

Vin Nom.

(Volts)

Range

Iin no

(Volts) (Amps) (Watts) Typ.

Max.

(Volts) load (mA) (Amps)

Min.

Typ.

Root Models ➀

UCQ-1.2/40-D24P-C

UCQ-1.2/30-D48N-C

UCQ-1.5/25-D48N-C

UCQ-1.5/40-D48N-C

UCQ-1.8/30-D48N-C

UCQ-2.5/40-D24P-C

UCQ-2.5/30-D48N-C

UCQ-3.3/35-D24P-C

UCQ-3.3/20-D48N-C

UCQ-3.3/30-D48N-C

UCQ-5/20-D24P-C

UCQ-5/20-D48N-C

UCQ-5/25-D48N-C

UCQ-8/12-D24P-C

UCQ-12/8.3-D48N-C

UCQ-15/6.7-D24P-C

1.2

1.5

1.8

2.5

3.3

5

40

30

25

40

30

40

30

35

20

30

20

25

12

8.3

48

36

Please contact Murata Power Solutions for further information.

50

100

80

50

30

50

35

100

80

0.125%

0.2%

0.25%

48

24

48

24

48

24

48

36-75

18-36

36-75

18-36

36-75

18-36

36-75

30

50

0.90

0.94

1.45

1.31

4.96

1.80

5.41

1.53

2.3

81%

85%

83%

82%

85%

87%

88.5%

90%

88%

89%

83%

86%

84%

87%

89%

90%

91%

91.5%

93%

37.5

60

100

TBD

120

100

50

54

45

100

75

120

50

115.5

66

0.125%

0.2%

130

50

80

99

80

50

100

125

96

60

0.125%

160

80

4.55

2.24

5

55

5

Please contact Murata Power Solutions for further information.

0.2% 0.25% 48 36-75 80 2.28

Please contact Murata Power Solutions for further information.

8

12

15

99.6

100

150

90%

91%

6.7 100.5

➀ Please refer to the part number structure for additional ordering part numbers and options.

➁ All speciﬁcations are at nominal line voltage and full load, +25 deg.C unless otherwise noted. See detailed speciﬁcations. Output capacitors are 1 µF ceramic || 10 µF electrolytic. I/O caps are necessary for

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

Outline dimensions: 2.3 × 1.45 × 0.39 inches

58.4 × 36.8 × 9.9 mm

Pinout: P32 (all models)

www.murata-ps.com

Technical enquiries email: sales@murata-ps.com, tel: +1 508 339 3000

MDC_UCQ Models.B07 Page 2 of 16

Single Output UCQ Models

Low-Proﬁle, Quarter Brick, 8.3-40 Amp

Isolated DC/DC Converters

PART NUMBER STRUCTURE

U CQ - 3.3 / 35 D48 N B H - C

-

Output

Conﬁguration:

Unipolar,

single output

RoHS Hazardous Materials compliance

C = RoHS-6 (no lead), standard

Y = RoHS-5 (with lead), optional, special order

Quarter-Brick Package

Nominal Output Voltage

Conformal coating (optional)

Blank = no coating, standard

H = coating added, optional special order

Baseplate (optional)

Maximum Rated Output :

Current in Amps

Blank = No baseplate, standard

B = Baseplate installed, optional special order

Input Voltage Range:

D24 = 18-36 Volts (24V nominal)

D48 = 36-75 Volts (48V nominal)

On/Off Control Polarity

P = Positive polarity (standard for D24, optional for D48)

N = Negative polarity (standard for D48, optional for D24)

Note: Some model combinations

may not be available. Contact Murata

Power Solutions for availability.

MECHANICAL SPECIFICATIONS

0.40

(10.2)

UCQ with Optional Baseplate

2.30 (58.4)

A

2.30 (58.4)

A

1.860 (47.2)

A

PINS 1-3, 5-7:

0.040Ø 0.001 (1.016 0.025)

PINS 4, 8:

0.015 minimum

clearance between

standoffs and

#M3 THD. X 0.15 DEEP

TYPICAL 4 PL.

0.18

(4.6)

0.060Ø 0.001 (1.524 0.025)

highest component

SCREW LENGTH MUST

NOT GO THROUGH BASEPLATE

2.00 (50.8)

A

4

1

2

3

0.50

(12.7)

5

6

7

8

0.600

(15.2)

Case C67

0.300

(7.6)

BOTTOM VIEW

PINS 1-3, 5-7:

0.040Ø 0.001 (1.016 0.025)

PINS 4, 8:

0.600 (15.24)

4 EQ. SP.

0.18

(4.6)

0.060Ø 0.001 (1.524 0.025)

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

Component locations may vary between units.

Third Angle Projection

I/O Connections

1

Function P32

−Input

5

Function P32

−Sense

Tolerances (unless otherwise speciﬁed):

.XX ꢀ.ꢀ0 (ꢀ.ꢁ)

.XXX ꢀ.ꢀꢂꢀ (ꢀ.0ꢁ)

Angles 02

2

Remote On/Off

+Input

6

Output Trim

+Sense

3

7

4

−Output

8

+Output

Components are shown for reference only.

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MDC_UCQ Models.B07 Page 3 of 16

Single Output UCQ Models

Low-Proﬁle, Quarter Brick, 8.3-40 Amp

Isolated DC/DC Converters

Performance Speciﬁcations and Ordering Guide ➀

UCQ-1.2/30-D48 UCQ-1.5/25-D48 UCQ-1.5/40-D48 UCQ-1.8/30-D48 UCQ-2.5/40-D24 UCQ-2.5/30-D48 UCQ-3.3/35-D24

Input

Input voltage range

Start-up threshold, Volts

See ordering guide.

34

33

34

32

34

16.8

15

34

32

17

15

Undervoltage

shutdown, V

32.5

none

Overvoltage shutdown

Reﬂected (back) ripple

current, mA pk-pk

10-30, model dependent

Input Current

Full load conditions

Inrush transient, A²sec

Output short circuit, mA

No load, mA

See ordering guide.

0.05

50-200, model dependent

30-160, model dependent

Low line (Vin = min.),

Amps

1.23

1.26

L-C

1.96

1.74

6.69

L-C

2.39

L-C

7.21

L-C

Standby mode, mA

(Off, UV, OT shutdown)

1-10, model dependent

Pi-type

Internal input ﬁlter type

Pi-type

Reverse polarity

protection

See notes.

Remote On/Off Control

Positive logic

OFF = Ground pin to +0.8V

(P model sufﬁx)

ON = Open or +3.5 to +13.5V max

Negative logic

(N model sufﬁx)

OFF = Open or +3.5 to +13.5V

ON = Ground pin to +1V max

Current, mA

1

Output

Voltage output range

Voltage output accuracy

See ordering guide.

1% of Vn o m ., (50% load)

Adjustment range,

% of Vn o m .

10%

−20 + 10

10%

−20 + 10

10%

Temperature coefﬁcient

Minimum loading

0.02% of Vo u t range per °C

No minimum loading.

Remote sense

compensation

+10%

Ripple/noise

(20 MHz bandwidth)

See ordering guide.

Line/Load regulation

Efﬁciency

See ordering guide.

Maximum capacitive

loading, µF low ESR

<0.02Ω max.,

1,000

10,000 max.

10,000

4,700

10,000

10,000 max.

10,000

resistive load

➀ Specs are typical unless noted.

www.murata-ps.com

Technical enquiries email: sales@murata-ps.com, tel: +1 508 339 3000

MDC_UCQ Models.B07 Page 4 of 16

Single Output UCQ Models

Low-Proﬁle, Quarter Brick, 8.3-40 Amp

Isolated DC/DC Converters

Performance Speciﬁcations and Ordering Guide ➀

UCQ-3.3/20-D48 UCQ-3.3/30-D48 UCQ-5/20-D24

UCQ-5/20-D48 UCQ-12/8.3-D48

Input

Input voltage range

Start-up threshold, Volts

See ordering guide

35

34

35

34

17

35

34

35

34

Undervoltage

shutdown, V

16

none

Overvoltage shutdown

Reﬂected (back) ripple

current, mA pk-pk

10-30, model dependent.

Input Current

Full load conditions

Inrush transient, A²sec

Output short circuit, mA

No load, mA

See ordering guide.

0.05

50-200, model dependent

30-160, model dependent

Low line (Vin = min.),

Amps

2.04

L-C

3.05

L-C

6.04

3.02

L-C

3.04

L-C

Standby mode, mA

(Off, UV, OT shutdown)

1-10, model dependent

Internal input ﬁlter type

L-C

Reverse polarity

protection

See notes.

Remote On/Off Control

Positive logic

OFF = Ground pin to +0.8V

(P model sufﬁx)

ON = Open or +3.5 to +13.5V max

Negative logic

(N model sufﬁx)

OFF = Open or +3.5 to +13.5V

ON = Ground pin to +1V max

Current, mA

1

Output

Voltage output range

Voltage output accuracy

See ordering guide.

1% of Vn o m ., (50% load)

Adjustment range,

% of Vn o m .

−10 to + 10%

Temperature coefﬁcient

Minimum loading

0.02% of Vo u t range per °C.

No minimum loading.

Remote sense

compensation

+10%

Ripple/noise

(20 MHz bandwidth)

See ordering guide.

Line/Load regulation

Efﬁciency

See ordering guide.

Maximum capacitive

loading, µF low ESR

<0.02Ω max.,

10,000

resistive load

➀ Specs are typical unless noted.

www.murata-ps.com

Technical enquiries email: sales@murata-ps.com, tel: +1 508 339 3000

MDC_UCQ Models.B07 Page 5 of 16

Single Output UCQ Models

Low-Proﬁle, Quarter Brick, 8.3-40 Amp

Isolated DC/DC Converters

Performance Speciﬁcations and Ordering Guide ➀

UCQ-1.2/30-D48 UCQ-1.5/25-D48 UCQ-1.5/40-D48 UCQ-1.8/30-D48 UCQ-2.5/40-D24 UCQ-2.5/30-D48 UCQ-3.3/35-D24

Isolation Voltage

Input to Output,

Volts min.

2250

1500

Input to baseplate,

Volts min.

Baseplate to output,

Volts min.

Isolation resistance, MΩ

Isolation capacitance, pF

Isolation safety rating

Miscellaneous

10-100, model dependent

1000

Basic insulation

Current limit inception

(98% of Vo u t , after

warmup), Amps

35

49

36

46

37

45

Short circuit protection

method

Current limiting, hiccup autorestart. Remove overload for recovery.

Short circuit current,

Amps

5

Short circuit duration

Continuous, output shorted to ground. No damage.

Overvoltage protection,

Volts (via magnetic

feedback)

1.8

1.95

2.7 V max

2.95

4

Dynamic characteristics

Dynamic load response 200 µSec to 1% 200 µSec to 1% 50 µSec to 1% of 100 µSec to 1% 200 µSec to 1% 200 µSec to 1% 100 µSec to 1%

(50-75-50% load step) of ﬁnal value

of ﬁnal value

ﬁnal value

of ﬁnal value

Start-up time

Vin to Vo u t regulated,

mSec

50

2

Remote On/Off to Vo u t

50

3

regulated, mSec

Switching frequency, KHz

350 20

440 40

400 40

400

480

450 30

350 10

Environmental

Calculated MTBF

TBD

2.2M hours

TBD

Operating temperature

range

−40 to +85, with derating

See Derating curves.

Operating case

temperature, °C"

(no derating)

−40 to +110

−40 to +120

−40 to +110

Storage temperature

range, °C

−55 to +125

Thermal protection/

shutdown, °C

110-125, model dependent

Relative humidity

To +85°C/85%, non-condensing

➀ Specs are typical unless noted.

www.murata-ps.com

Technical enquiries email: sales@murata-ps.com, tel: +1 508 339 3000

MDC_UCQ Models.B07 Page 6 of 16

Single Output UCQ Models

Low-Proﬁle, Quarter Brick, 8.3-40 Amp

Isolated DC/DC Converters

Performance Speciﬁcations and Ordering Guide ➀

UCQ-3.3/20-D48 UCQ-3.3/30-D48 UCQ-5/20-D24

UCQ-5/20-D48 UCQ-12/8.3-D48

Isolation Voltage

Input to Output,

Volts min.

2250

1500

Input to baseplate,

Volts min.

Baseplate to output,

Volts min.

Isolation resistance, MΩ

Isolation capacitance, pF

Isolation safety rating

10-100, model dependent

1000

Basic insulation

Current limit inception

(98% of Vo u t , after

warmup), Amps

24 min.

33 min.

26

22 min.

10

Short circuit protection

method

Current limiting, hiccup autorestart. Remove overload for recovery.

Short circuit current,

Amps

5

Short circuit duration

Continuous, output shorted to ground. No damage.

Overvoltage protection,

Volts (via magnetic

feedback)

4.6 max.

4 max.

6.25

TBD

14.4

Dynamic characteristics

Dynamic load response 200 µSec to 1% 200 µSec to 1% 200 µSec to 1% 200 µSec to 1% 200 µSec to 1%

(50-75-50% load step) of ﬁnal value

of ﬁnal value

Start-up time

Vin to Vo u t regulated,

mSec

50

50 max.

4

10 max.

50

Remote On/Off to Vo u t

50

50 max.

4

10 max.

50

regulated, mSec

Switching frequency, KHz

330 40

400 24

315 30

330 40

Environmental

Calculated MTBF

TBD

Operating temperature

range

−40 to +85, with derating

See Derating curves.

Operating case

temperature, °C"

(no derating)

−40 to +110

Storage temperature

range, °C

−55 to +125

Thermal protection/

shutdown, °C

110-125, model dependent

Relative humidity

To +85°C/85%, non-condensing

➀ Specs are typical unless noted.

www.murata-ps.com

Technical enquiries email: sales@murata-ps.com, tel: +1 508 339 3000

MDC_UCQ Models.B07 Page 7 of 16

Single Output UCQ Models

Low-Proﬁle, Quarter Brick, 8.3-40 Amp

Isolated DC/DC Converters

Performance Speciﬁcations and Ordering Guide ➀

UCQ-1.2/30-D48 UCQ-1.5/25-D48 UCQ-1.5/40-D48 UCQ-1.8/30-D48 UCQ-2.5/40-D24 UCQ-2.5/30-D48 UCQ-3.3/35-D24

Physical

Outline dimensions

Pin material

Pin diameter

Pin ﬁnish

See mechanical specs.

Copper alloy

0.04/0.062 inches (1.016/1.524 mm)

Nickel underplate with gold overplate

Weight, ounces

Weight, grams

1.06

30

1.06

30

0.9

25

0.9

1.06

30

1.06

30

1.02

29

25

Electromagnetic

interference

FCC part 15, class B, EN55022

(Conducted and radiated. External ﬁlter required)

Safety

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

UCQ-3.3/20-D48 UCQ-3.3/30-D48 UCQ-5/20-D24

UCQ-5/20-D48 UCQ-12/8.3-D48

Physical

Outline dimensions

Pin material

See mechanical specs.

Copper alloy

Pin diameter

Pin ﬁnish

0.04/0.062 inches (1.016/1.524 mm)

Nickel underplate with gold overplate

Weight, ounces

Weight, grams

0.7

20

TBD

1.06

TBD

1.13

32

30

Electromagnetic

interference

FCC part 15, class B, EN55022

(Conducted and radiated. External ﬁlter required)

Safety

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

Caution: This product is not internally fused. To comply with safety agency certiﬁcations and to avoid injury to personnel or equipment, the user must supply an external fast-blow fuse to the input terminals.

See fuse information.

Speciﬁcation Notes

(1) All models are tested and speciﬁed with external 1||10 µF ceramic/tantalum output capacitors no external input capacitor. All capacitors are low ESR types. These capacitors are necessary to accom-

modate 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. All speciﬁcations are

typical unless noted. General conditions for Speciﬁcations are +25 deg.C, Vin and Vo u t = nominal, full load. Adequate airﬂow must be supplied for extended testing under power.

(2) Input Ripple Current is tested and speciﬁed over a 5 Hz to 20 MHz bandwidth. Input ﬁltering is Cin = 33 µF, 100V tantalum, Cb u s = 220 µF, 100V electrolytic, Lb u s = 12 µH.

(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 of reduced power dissipation with increasing density altitude.

(4) Mean Time Before Failure is calculated using the Telcordia (Belcore) SR-332 Method 1, Case 3, ground ﬁxed conditions, Tpcboard = +25 deg.C, full output load, natural air convection.

(5) The 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.

(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. This may damage the outputs.

(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.

(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) Output accuracy is dependent on user-supplied trim resistors. To achieve high accuracy, use 1% or better tolerance metal-ﬁlm resistors mounted close to the converter.

(12) Output current limit and short circuit protection is non-latching. When the overcurrent fault is removed, the converter will immediately recover.

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

(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.

(15) Input Fusing: If reverse polarity is accidentally applied to the input, a body diode will become forward biased and will conduct considerable current. 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 with nominal input voltage.

(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.

www.murata-ps.com

Technical enquiries email: sales@murata-ps.com, tel: +1 508 339 3000

MDC_UCQ Models.B07 Page 8 of 16

Single Output UCQ Models

Low-Proﬁle, Quarter Brick, 8.3-40 Amp

Isolated DC/DC Converters

The On/Off Control to VOUT start-up time assumes the converter has its

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

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

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

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

Control to VOUT start-up time is also governed by the internal soft start circuitry

and external load capacitance. The difference in start up time from VIN to VOUT

and from On/Off Control to VOUT is therefore insigniﬁcant.

Absolute Maximum Ratings

Input Voltage

Continuous

Transient (100msec)

24V Models

0 to +36 Volts

+50 Volts

48V Models

0 to +75 Volts

+100 Volts

On/Off Control

0V min. to +13.5V max.

See Fuse section

TBD

Current-limited. Devices can withstand

sustained short circuit without damage.

–40 to +100°C

Input Reverse Polarity Protection

Output Overvoltage

Output Current

Operating Temperature

Storage Temperature

Lead Temperature (soldering 10 sec. max.) +280°C

Input Source Impedance

–55 to +125°C

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

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

highly 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.

These are stress ratings. Exposure of devices to 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, nor recommended.

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 exists. For DATEL UCQ series DC/DC converters, we recommend the

use of a time delay fuse, installed in the ungrounded input supply line.

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

All models in the UCQ Series are tested/speciﬁed for input reﬂected ripple

current and output noise using the speciﬁed external input/output compo-

nents/circuits and layout as shown in the following two ﬁgures. External input

capacitors (CIN in Figure 2) serve primarily as energy-storage elements, mini-

mizing 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 sta-

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

system conﬁguration may necessitate additional considerations.

As a rule of thumb however, we recommend the use of a normal-blow or

slow-blow fuse with a typical value about twice the maximum input current,

calculated at low line with the converter’s minimum efﬁciency.

All relevant national and international safety standards and regulations must

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

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

safety standard, i.e. IEC/EN/UL60950-1.

TO

Input Reverse-Polarity Protection

CURRENT

PROBE

OSCILLOSCOPE

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

could cause permanent damage to the converter.

3

1

+INPUT

–INPUT

L

BUS

+

V

IN

C

BUS

CIN

–

Input Under-Voltage Shutdown and Start-Up Threshold

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

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

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

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

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

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

C

^IN= 33µF, ESR < 700mΩ @ 100kHz

^BUS= 220µF, ESR < 100mΩ @ 100kHz

L^BUS= 12µH

Figure 2. Measuring Input Ripple Current

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

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

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

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

for bulk capacitance, low ESR and appropriate frequency response.

Start-Up Time

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

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

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

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

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

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

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

All external capacitors should have appropriate voltage ratings and be

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

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

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

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

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MDC_UCQ Models.B07 Page 9 of 16

Single Output UCQ Models

Low-Proﬁle, Quarter Brick, 8.3-40 Amp

Isolated DC/DC Converters

In Figure 3, the two copper strips simulate real-world PCB impedances

between the power supply and its load. In order to minimize measurement

errors, scope measurements should be made using BNC connectors, or the

probe ground should be less than ½ inch and soldered directly to the ﬁxture.

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

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

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

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

circuit condition as described below.

7

COPPER STRIP

+SENSE

Short Circuit Condition

8

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 mag-

netically coupled voltage used to develop primary side voltages will also drop,

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

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

ate value. If the short-circuit condition persists, another shutdown cycle will be

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

reduces the average output current, thereby preventing internal temperatures

from rising to excessive levels. The UCQ Series is capable of enduring an

indeﬁnite short circuit output condition.

+OUTPUT

R

LOAD

SCOPE

C1

C2

4

5

–OUTPUT

–SENSE

COPPER STRIP

C1 = 1µF CERAMIC

C2 = 10µF TANTALUM

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

Remote Sense

Figure 3. Measuring Output Ripple/Noise (PARD)

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

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

the user should connect the +Sense to +VOUT and –Sense to –VOUT at the DC/

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

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

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

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

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

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

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

should be run adjacent to dc signals, preferably ground.

Floating Outputs

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

respect to their input. Designers will normally use the –Output (pin 4) as the

ground/return of the load circuit. You can however, use the +Output (pin 8) as

ground/return to effectively reverse the output polarity.

Minimum Output Loading Requirements

UCQ 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.

[VOUT(+)-VOUT(–)] – [Sense(+)-Sense(–)] ≤ 10%VOUT

Thermal Shutdown

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

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

the designed operating temperature, a precision temperature sensor 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.

#ONTACT AND 0#" RESISTANCE

LOSSES DUE TO )2 DROPS

ꢇ

ꢄ

ꢀ/54054

n).054

)/54

ꢈ

ꢀ3%.3%

3ENSE #URRENT

Output Over-Voltage Protection

ꢅ

/.ꢁ/&&

#/.42/,

ꢆ

ꢃ

42)-

n3%.3%

,/!$

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

parator. The signal is optically coupled to the primary side and if the output volt-

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

will power down the PWM controller causing the output voltage to 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

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

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

3ENSE 2ETURN

)/54 2ETURN

ꢉ

ꢂ

ꢀ).054

n/54054

#ONTACT AND 0#" RESISTANCE

LOSSES DUE TO )2 DROPS

Figure 4. Remote Sense Circuit Conﬁguration

Current Limiting

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

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

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

current, thereby maintaining somewhat constant power dissipation. This is

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

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

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

VOUT and Sense in conjunction with trim adjustment of the output voltage can

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MDC_UCQ Models.B07 Page 10 of 16

Single Output UCQ Models

Low-Proﬁle, Quarter Brick, 8.3-40 Amp

Isolated DC/DC Converters

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

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

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

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

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

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

ꢇ

ꢄ

ꢉ

ꢀ/54054

n).054

ꢈ

ꢆ

ꢃ

ꢂ

ꢀ3%.3%

42)-

/.ꢁ/&&

#/.42/,

,/!$

2^{42)- $/7.}

(VOUT at pins) x (IOUT) ≤ rated output power

n3%.3%

n/54054

Trimming Output Voltage

ꢅ

ꢀ).054

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

output voltage (refer to the trim equations and trim graphs that follow). Adjust-

ments to the output voltage can be accomplished via a trim pot (Figure 5) or

a single ﬁxed resistor as shown in Figures 6 and 7. 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.

Figure 7.Trim Connections To Decrease Output Voltages Using Fixed Resistors

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.

Trim Equations

(For all models except the UCQ-1.2/40-D24 and -1.2/30-D48)

ꢉ

ꢆ

ꢃ/54054

n).054

Trim Down

Connect trim resistor between

Trim Up

Connect trim resistor between

ꢊ

ꢃ3%.3%

trim pin and −Sense

trim pin and +Sense

ꢀꢁꢂꢂ

452.3

ꢈ

ꢀ

ꢅ

ꢂ

ꢇ

/.ꢄ/&&

#/.42/,

42)-

n3%.3%

,/!$

5.11 × VNOM × (1+

5.11



− 5.11

R

_TrimDn(k Ω) =

R_TrimUp(k Ω) =

− 10.22

1.225 × 



Where,

   V^NOM− VOUT) / VNOM 

V^NOMis the nominal, untrimmed output voltage.

ꢃ).054

n/54054

V^OUTis the desired new output voltage.

Figure 5.Trim Connections Using A Trimpot

Do not exceed the speciﬁed trim range or maximum power ratings

when adjusting trim. Use 1% precision resistors mounted close

to the converter on short leads.

(For the UCQ-1.2/40-D24 and -1.2/30-D48)

ꢇ

ꢄ

ꢀ/54054

n).054

Trim Down

Connect trim resistor between

Trim Up

Connect trim resistor between

ꢈ

ꢀ3%.3%

trim pin and −Sense

trim pin and +Sense

ꢆ

ꢉ

ꢅ

/.ꢁ/&&

#/.42/,

42)-

,/!$

5.11 × VNOM × (1+

5.11

R

_TrimDn(k Ω) =

R

_TrimUp(k Ω) =

2^{42)- 50}

2 − 2

1.225 × 

ꢃ

n3%.3%

Trim adjustments greater than the speciﬁed range can have an adverse

ꢂ

ꢀ).054

n/54054

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

voltage differences between VOUT and Sense, in conjunction with trim adjust-

ment of the output voltage, can cause the over-voltage protection circuitry to

activate (see Performance Speciﬁcations for over-voltage limits). 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 converter’s

speciﬁed rating, or cause output voltages to climb into the output over-voltage

region. Therefore:

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

(Vo u t at pins) x (Io u t ) ≥ rated output power

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MDC_UCQ Models.B07 Page 11 of 16

Single Output UCQ Models

Low-Proﬁle, Quarter Brick, 8.3-40 Amp

Isolated DC/DC Converters

Typical Performance Curves

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.

In such cases, a 0.22µF capacitor between trim and –Vo u t can be added to

reduce this long lead effect.

5#1ꢀꢁꢂꢁꢃꢁꢄꢀ$ꢅꢆ /UTPUT 4RANSIENT 2ESPONSE

ꢀ6). ꢁ ꢂꢃ6ꢄ RESISTIVE LOAD STEP ꢅꢆꢇ TO ꢆꢈꢇꢉ

On/Off Control

The input-side, remote On/Off Control function (pin 2) can be ordered to operate

with either polarity:

Positive (no sufﬁx): standard models are equipped with Positive-polarity and

are enabled when pin 2 is left open (or is pulled high, applying +3.5V to +13.5V

with respect to –Input, pin 1) as per Figure 8. Positive-polarity devices are

disabled when pin 2 is pulled low (0 to 0.8V with respect to –Input).

ꢊꢈꢈ§SECꢋDIV

ꢃ).054

ꢀ

ꢁ

5#1ꢀꢁꢂꢁꢃꢁꢄꢀ$ꢅꢆ /UTPUT 4RANSIENT 2ESPONSE

ꢀ6). ꢁ ꢂꢃ6ꢄ RESISTIVE LOAD STEP ꢅꢆꢇ TO ꢈꢅꢇꢉ

ꢂꢀ6 #)2#5)4

ꢄ6 #)2#5)4

/.ꢅ/&&

#/.42/,

ꢂ

n).054

Figure 8. Driving the Negative Polarity On/Off Control Pin

Negative (“N” sufﬁx): Optional Negative-polarity devices are off when pin 2

is left open (or pulled high, applying +3.5V to +13.5V), and on when pin 2 is

pulled low (0 to 1V) with respect to –Input as shown in Figure 9.

ꢊꢆꢆ§SECꢋDIV

5#1ꢀꢁꢂꢁꢃꢁꢄꢀ$ꢅꢆ %NABLE /Nꢃ/FF

ꢀ6). ꢁ ꢂꢃ6ꢄ )/54 ꢁ ꢅꢆ!ꢇ

ꢀ

ꢁ

ꢃ).054

ꢃ6##

6/54

ꢈ6ꢉDIV

/.ꢄ/&&

#/.42/,

#ONTROL

0IN

ꢊ6ꢉDIV

ꢂ

n).054

ꢊMSECꢉDIV

Figure 9. Driving the Negative Polarity On/Off Control Pin

5#1ꢀꢁꢂꢁꢃꢁꢄꢀ$ꢅꢆ 2IPPLE AND .OISE

ꢀ6). ꢁ ꢂꢃ6ꢄ )/54 ꢁ ꢅꢆ! RESISTIVEꢄ OUTPUT CAPS ꢇ§& CERAMIC \\ ꢇꢆ§& TANTALUMꢈ

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

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

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

Performance Speciﬁcations) when activated and withstand appropriate voltage

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

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

ꢋ§SECꢊDIV

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MDC_UCQ Models.B07 Page 12 of 16

Single Output UCQ Models

Low-Proﬁle, Quarter Brick, 8.3-40 Amp

Isolated DC/DC Converters

Typical Performance Curves

UCQ-1.2/30-D48 Maximum Current Temperature Derating

No baseplate, V^IN= 48V (at sea level), longitudinal airflow

UCQ-1.2/30-D48 Efficiency vs Line Voltage and Load Current @25˚ C

95

35

30

25

20

90

85

80

75

70

VIN = 36V

400 lfm

65

60

55

50

45

40

300 lfm

V

IN = 48V

15

10

5

200 lfm

V

IN = 75V

100 lfm

0

3

6

9

12

15

18

21

24

27

75

30

35

40

45

50

55

60

65

70

75

80

Load Current (Amps)

Ambient Temperature ( C)

°

UCQ-1.5/25-D48 Efficiency vs Line Voltage and Load Current @25˚ C

UCQ-1.5/25-D48 Maximum Current Temperature Derating

No baseplate, VIN = 48V (at sea level), longitudinal airflow

90

88

86

84

82

80

78

30

25

20

15

10

VIN = 75V

76

74

72

70

68

66

64

62

60

VIN = 48V

VIN = 36V

400 lfm

300 lfm

200 lfm

5

100 lfm

0

3

4

5

6

7

8

9

10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25

30

35

40

45

50

55

60

65

70

75

80

Load Current (Amps)

Ambient Temperature ( C)

°

UCQ-1.8/30-D48 Efficiency vs Line Voltage and Load Current @25˚ C

UCQ-1.8/30-D48 Maximum Current Temperature Derating

No baseplate, VIN = 48V (at sea level), longitudinal airflow

90

32

30

28

26

24

88

86

84

V

IN = 36V

IN = 48V

IN = 75V

82

80

78

76

74

72

70

V

22

400 lfm

300 lfm

200 lfm

20

100 lfm

Natural convection

18

4

6

8

10

12

14

16

18

20

22

24

26

28

30

35

40

45

50

55

60

65

70

75

80

Load Current (Amps)

Ambient Temperature ( C)

°

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MDC_UCQ Models.B07 Page 13 of 16

Single Output UCQ Models

Low-Proﬁle, Quarter Brick, 8.3-40 Amp

Isolated DC/DC Converters

Typical Performance Curves

UCQ-2.5/30-D48 Efficiency vs Line Voltage and Load Current @25˚ C

UCQ-2.5/30-D48 Maximum Current Temperature Derating

No baseplate, VIN = 24V (at sea level)

95

35

30

25

20

15

90

85

80

75

V

IN = 75V

70

65

60

55

50

45

40

V

IN = 48V

V

IN = 36V

400 lfm

10

300 lfm

200 lfm

5

100 lfm

1

3

6

9

12

15

18

21

24

27

30

0

30

35

40

45

50

55

60

65

70

75

80

Load Current (Amps)

Ambient Temperature ( C)

°

UCQ-2.5/40-D24 Efficiency vs Line Voltage and Load Current @25˚ C

UCQ-2.5/40-D24 Maximum Current Temperature Derating

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

95

35

30

25

20

15

90

85

V

IN = 24V

80

75

70

65

60

55

50

V

IN = 18V

V

IN = 35V

10

400 lfm

300 lfm

5

200 lfm

100 lfm

0

3

6

9

12

15

18

21

24

27

30

33

36

39 40

30

35

40

45

50

55

60

65

70

75

80

Load Current (Amps)

Ambient Temperature ( C)

°

UCQ-3.3/30-D48 Maximum Current Temperature Derating

No baseplate, V^IN= 48V (at sea level)

UCQ-3.3/30-D48 Efficiency vs Line Voltage and Load Current @25°C

95

40

35

30

25

20

90

85

VIN = 36V

100 lfm

15

80

75

70

V

IN = 50V

200 lfm

10

300 lfm

V

IN = 75V

5

400 lfm

0

85

25

30

35

40

45

50

Ambient Temperature (°C)

55

60

65

70

75

80

5

10

15

20

25

30

Load Current (Amps)

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MDC_UCQ Models.B07 Page 14 of 16

Single Output UCQ Models

Low-Proﬁle, Quarter Brick, 8.3-40 Amp

Isolated DC/DC Converters

Typical Performance Curves

UCQ-3.3/30-D48 Maximum Current Temperature Derating

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

UCQ-3.3/35-D48 Maximum Current Temperature Derating

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

40

35

30

25

20

36

34

32

30

28

Natural Convection

100 lfm

26

15

100 lfm

24

200 lfm

10

200 lfm

22

300 lfm

5

20

400 lfm

0

18

35

40

45

50

Ambient Temperature (°C)

55

60

65

70

75

80

85

25

30

80

85

20

25

30

35

40

45

Ambient Temperature (°C)

50

55

60

65

70

75

UCQ-3.3/35-D24 Maximum Current Temperature Derating

No baseplate, V^IN= 48V (at sea level), longitudinal airflow

UCQ-3.3/35-D24 Efficiency vs Line Voltage and Load Current @25˚ C

92

35

30

25

20

15

90

88

86

84

VIN = 36V

VIN = 24V

VIN = 18V

82

80

78

76

74

72

70

400 lfm

10

300 lfm

200 lfm

5

100 lfm

0

30

35

40

45

50

55

60

65

70

75

80

3

5

7

9

11

15

17

19

21

23

25

27

29

31

33

35

Ambient Temperature (°C)

Load Current (Amps)

UCQ-5/20-D48

Efficiency vs Line Voltage and Load Current @25°C

95

90

85

V

IN = 36V

80

75

70

VIN = 50V

VIN = 75V

4

6

8

10

12

14

16

18

20

Load Current (Amps)

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MDC_UCQ Models.B07 Page 15 of 16

Single Output UCQ Models

Low-Proﬁle, Quarter Brick, 8.3-40 Amp

Isolated DC/DC Converters

Typical Performance Curves

UCQ-12/8.3-D48 Maximum Current Temperature Derating

No baseplate, V^IN= 48V (at sea level), longitudinal airflow

UCQ-12/8.3-D48 Efficiency vs Line Voltage and Load Current @25˚ C

96

9

94

92

90

8

7

6

5

VIN = 75V

VIN = 48V

VIN = 36V

88

84

82

80

78

76

74

72

70

4

400 lfm

300 lfm

3

200 lfm

100 lfm

2

1

0

30

35

40

45

50

55

60

65

70

75

80

0.8

1.6

2.4

3.2

4

4.8

5.6

6.4

7.2

8.3

Ambient Temperature ( C)

°

Load Current (Amps)

USA:

Mansﬁeld (MA), Tel: (508) 339-3000, email: sales@murata-ps.com

Toronto, Tel: (866) 740-1232, email: toronto@murata-ps.com

Milton Keynes, Tel: +44 (0)1908 615232, email: mk@murata-ps.com

Canada:

UK:

Murata Power Solutions, Inc.

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

Tel: (508) 339-3000 (800) 233-2765 Fax: (508) 339-6356

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0058//0199//0088

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

France:

Germany:

Japan:

Montigny Le Bretonneux,Tel: +33 (0)1 34 60 01 01, email: france@murata-ps.com

München, Tel: +49 (0)89-544334-0, email: munich@murata-ps.com

Tokyo, Tel: 3-3779-1031, email: sales_tokyo@murata-ps.com

Osaka, Tel: 6-6354-2025, email: sales_osaka@murata-ps.com

China:

Shanghai, Tel: +86 215 027 3678, email: shanghai@murata-ps.com

Guangzhou, Tel: +86 208 221 8066, email: guangzhou@murata-ps.com

notice.

Singapore: Parkway Centre, Tel: +65 6348 9096, email: singapore@murata-ps.com

www.murata-ps.com

Technical enquiries email: sales@murata-ps.com, tel: +1 508 339 3000

MDC_UCQ Models.B07 Page 16 of 16


型号：	UCQ-3.3-35-D48PHCY
厂家：	muRata
描述：	Low-Profile, Quarter Brick, 8.3-40 Amp Isolated DC/DC Converters 低调， 1/4砖， 8.3-40放大器隔离式DC / DC转换器转换器放大器
文件：	总16页 (文件大小：2032K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

UCQ-3.3-35-D48PHCY [MURATA]

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