PXD30-xxWSxx Application Note

PXD30-xxWS-xx-Single Output DC/DC Converters

9 to 36 Vdc and 18 to 75 Vdc input, 1.5 to 15 Vdc Single Output, 30W

Applications



Wireless Network



Telecom / Datacom



Industry Control System



Measurement



Semiconductor Equipment

Features



RoHS compliant



Single output up to 8.5A



Six-sided continuous shield



No minimum load required



High power density



High efficiency up to 91%



Small size

2.00 x 1.00 x 0.400 inch (50.8

25.410.2 mm )



Input to output isolation (1600VDC)



4:1 ultra wide input voltage range



Fixed switching frequency



Input under-voltage protection



Output over-voltage protection



Over-current protection



Output short circuit protection



Remote on/off



Case grounding

Options



Negative logic Remote On/Off



Heatsink

General Description

The PXD30-xxWS-xx single output series offers 30 watts of output power from a 2 x 1.0 x 0.4 inch package.

This series has a 4:1 ultra wide input voltage of 9-36VDC, 18-75VDC and features 1600VDC of isolation, short circuit protection , over-voltage protection, over-current protection and six sided shielding. All models are particularly suited for telecommunications, industrial, mobile telecom and test equipment applications.

Table of contents

Absolute Maximum Rating

Output Specification

Input Specification

General Specification

Characteristic Curves

Testing Configurations

EMC Considerations

Input Source Impedance

Output Over Current Protection

Output Over Voltage Protection

Short Circuit Protection

P2 Output Voltage adjustment

P2 Thermal Consideration

P3 Heatsink Consideration

P4 Remote ON/OFF Control

P5 Mechanical Data

P33 Recommended Pad Layout

P34 Soldering and Reflow Consideration

P35 Packaging Information

P35 Part Number Structure

P35 Safety and Installation Instruction

P35 MTBF and Reliability

P36

P37

P38

P39

P40

P40

P41

P42

P43

P43

P44

DataSheet

30W, Single Output

Input Voltage

Continuous

Parameter

Transient (100ms)

Operating Ambient Temperature without derating with derating

Operating Case Temperature

Storage Temperature

Absolute Maximum Ratings

Model

24WSxx

48WSxx

24WSxx

48WSxx

All

All

All

Min

-40

50

-55

Max

40

80

50

100

50

85

105

105

Unit

Vdc

°C

°C

°C

Parameter

Output Voltage

(Vin = Vin(nom) ; Full Load ; TA=25°C)

Voltage adjustability

Output Regulation

Line (Vin(min) to Vin(max) at Full Load)

Load (0% to 100% of Full Load)

Output Ripple & Noise

Peak-to-Peak (5Hz to 20MHz bandwidth)

(Measured with a 1

μF/50V MLCC)

Output Specification

Model xxWS1P5 xxWS2P5 xxWS3P3 xxWS05 xxWS5P1 xxWS12 xxWS15

All

All xxWS1P5 xxWS2P5 xxWS3P3 xxWS05 xxWS5P1 xxWS12 xxWS15

Temperature Coefficient

All

Min

1.485

2.475

3.267

4.95

5.049

11.88

14.85

-10

-0.2

-0.5

-0.02

Output Voltage Overshoot

(Vin = Vin(min) to Vin(max) ; Full Load ; TA=25°C)

Dynamic Load Response

(Vin = Vin(nom) ; TA=25°C)

Load step change from

75% to 100% or 100 to 75% of Full Load

Peak Deviation

Setting Time (Vo＜10% peak deviation)

Output Current

All

All

All xxWS1P5 xxWS2P5 xxWS3P3 xxWS05 xxWS5P1 xxWS12 xxWS15

0

0

0

0

0

0

0

Typ

1.5

2.5

3.3

5.0

5.1

12

15

0

300

250

100

100

100

100

100

150

150

+0.02

Max

1.515

2.525

3.333

5.05

5.151

12.12

15.15

+10

+0.2

+0.5

5

8500

8000

7500

6000

6000

2500

2000

Unit

Vdc

%

% Vo mVp-p

%

Vo/°C

% Vo mV

μs mA

VER:01 Page 2 of 44 Issued Date：2009/06/22

DataSheet

30W, Single Output

Parameter


(Zener diode clamp)


Output Short Circuit Protection

Output Specification(Continued)

Model xxWS1P5 xxWS2P5 xxWS3P3 xxWS05 xxWS5P1 xxWS12 xxWS15

Min

All

All

Typ

2.0

3.3

3.9

6.2

6.2

15

18

Max Unit

Vdc

150

Hiccup, automatic recovery

% FL.

Parameter

Operating Input Voltage

Input Current

(Maximum value at Vin = Vin(nom); Full Load)

Input Standby current

(Typical value at Vin = Vin(nom); No Load)

Under Voltage Lockout Turn-on Threshold

Under Voltage Lockout Turn-off Threshold

Input Specification

Model

24WSxx

48WSxx

24WS1P5

24WS2P5

24WS3P3

24WS05

24WS5P1

24WS12

24WS15

48WS1P5

48WS2P5

48WS3P3

48WS05

48WS5P1

48WS12

48WS15

24WS1P5

24WS2P5

24WS3P3

24WS05

24WS5P1

24WS12

24WS15

48WS1P5

48WS2P5

48WS3P3

48WS05

48WS5P1

48WS12

48WS15

24WSxx

48WSxx

24WSxx

48WSxx

Min

9

18

Typ

24

48

45

65

65

60

20

30

30

45

50

9

70

70

70

105

105

36

8

32 mA mA

Vdc

Vdc

Max

1471

1471

350

520

629

744

759

727

718

36

75

700

1054

1258

1488

1517

Unit

Vdc


DataSheet

30W, Single Output

Input Specification(Continuous)

Parameter

Input reflected ripple current

(5 to 20MHz, 12 μH source impedance)

Start Up Time

(Vin = Vin(nom) and constant resistive load)

Power up

Remote ON/OFF

Remote ON/OFF Control

(The On/Off pin voltage is referenced to -Vin)

Positive logic

On/Off pin High Voltage (Remote ON)

On/Off pin Low Voltage (Remote OFF)

Model

All

All

All

Min

3.0

0

Typ

20

30

30

Max

12

1.2

Unit mAp-p ms

Vdc

Vdc

Negative logic

On/Off pin Low Voltage (Remote ON)

On/Off pin High Voltage (Remote OFF)

Remote Off Input Current

Input Current of Remote Control Pin

Parameter

Efficiency

(Vin = Vin(nom) ; Full Load ; TA=25°C)

All

All

0

3.0

-0.5

3

1.2

12

0.5

Vdc

Vdc mA mA

General Specification

Model

24WS1P5

24WS2P5

24WS3P3

24WS05

24WS5P1

24WS12

24WS15

48WS1P5

48WS2P5

48WS3P3

48WS05

48WS5P1

48WS12

48WS15

All

Min Typ

80

83

86

88

88

89

Max Unit

89

80

84

86

%

88

88

90

91

Connect case to –Vin with decoupling Y cap.

Case grounding

Isolation voltage

Input to Output

Input to Case, Output to Case

Isolation resistance

Isolation capacitance

Switching Frequency

Weight

MTBF

Bellcore TR-NWT-000332, T

C

=40°C

MIL-HDBK-217F

Over temperature protection

All

All

All

All

All

All

All

1600

1600

1

430

30.5

3.17×10

6

4.35×10

5

115

1500 hours

°C

Vdc

G

Ω pF

KHz g


DataSheet

Characteristic Curves

All test conditions are at 25°C.The figures are for PXD30-24WS1P5

30W, Single Output

Efficiency Versus Output Current Power Dissipation Versus Output Current

Efficiency Versus Input Voltage. Full Load Derating Output Current VersusAmbient Temperature andAirflow

Vin=Vin(nom)


DataSheet

Characteristic Curves (Continued)


30W, Single Output

Typical Output Ripple and Noise.

Vin=Vin(nom), Full Load

Transient Response to Dynamic Load Change from

100% to 75% to 100% of Full Load ; Vin=Vin(nom)

Typical Input Start-Up and Output Rise Characteristic


Using ON/OFF Voltage Start-Up and Vo Rise Characteristic


Conduction Emission of EN55022 Class A



DataSheet



30W, Single Output



Vin=Vin(nom)


DataSheet


All test conditions are at 25°C The figures are for PXD30-24WS2P5

30W, Single Output












DataSheet


All test conditions are at 25°C.The figures are for PXD30-24WS3P3.

30W, Single Output



Vin=Vin(nom)


DataSheet


All test conditions are at 25°C.The figures are for PXD30-24WS3P3.

30W, Single Output












DataSheet


All test conditions are at 25°C.The figures are for PXD30-24WS05.

30W, Single Output



Vin=Vin(nom)


DataSheet


All test conditions are at 25°C.The figures are for PXD30-24WS05.

30W, Single Output












DataSheet


All test conditions are at 25°C.The figures are identical for PXD30-24WS5P1

30W, Single Output



Vin=Vin(nom)


DataSheet


All test conditions are at 25°C .The figures are for PXD30-24WS5P1

30W, Single Output












DataSheet


All test conditions are at 25°C .The figures are for PXD30-24WS12.

30W, Single Output



Vin=Vin(nom)


DataSheet


All test conditions are at 25°C .The figures are for PXD30-24WS12

30W, Single Output












DataSheet



30W, Single Output



Vin=Vin(nom)


DataSheet



30W, Single Output












DataSheet



30W, Single Output



Vin=Vin(nom)


DataSheet



30W, Single Output












DataSheet



30W, Single Output



Vin=Vin(nom)


DataSheet



30W, Single Output












DataSheet



30W, Single Output



Vin=Vin(nom)


DataSheet



30W, Single Output












DataSheet



30W, Single Output



Vin=Vin(nom)


DataSheet



30W, Single Output












DataSheet



30W, Single Output



Vin=Vin(nom)


DataSheet


All test conditions are at 25°C .The figures are for PXD30-48WS5P1.

30W, Single Output












DataSheet



30W, Single Output


Efficiency Versus Input Voltage. Full Load Derating Output Current VersusAmbient Temperature and Airflow

Vin=Vin(nom)


DataSheet



30W, Single Output












DataSheet



30W, Single Output



Vin=Vin(nom)


DataSheet



30W, Single Output












DataSheet

Testing Configurations

Input reflected-ripple current measurement test:

30W, Single Output

Component

L

C

Value

12 μH

47 μF

Voltage

----

100V

Peak-to-peak output ripple & noise measurement test:

Reference

----

Aluminum Electrolytic Capacitor

GROUND RING

+Vo -Vo

Resistive Load

Output voltage and efficiency measurement test:

TO SCOPE

Note:All measurements are taken at the module terminals.

Efficiency







V

V in o





I o

I in







100 %


DataSheet

EMC Considerations

30W, Single Output

Suggested Schematic for EN55022 Conducted Emission Class A Limits

Recommended layout with input filter

To meet conducted emissions EN55022 CLASS A needed the following components:

PXD30-24WSxx

Component

C1

C2,C3,C4

Value

4.7uF

1000pF

Voltage

50V

2KV

1812 MLCC

1206 MLCC

Reference

PXD30-48WSxx

Component

C1

C2,C3,C4

Value

2.2uF

1000pF

Voltage

100V

2KV

1812 MLCC

1206 MLCC

Reference


DataSheet

30W, Single Output

Input Source Impedance

The converter should be connected to a low impedance input source. Highly inductive source impedance can affect the stability of the converter. Input external L-C filter is recommended to minimize input reflected ripple current.

The inductor has a simulated source impedance of 12 μH and the capacitor is Nippon chemi-con KY series

47

μF/100V. The capacitor must be located as close as possible to the input terminals of the converter for lowest impedance.


When excessive output currents occur in the system, circuit protection is required on all converters. Normally, overload current is maintained at approximately 150 percent of rated current for PXD30-xxWSxx series.

Hiccup-mode is a method of operation in the converter whose purpose is to protect the converter from being damaged during an over-current fault condition. It also enables the converter to restart when the fault is removed.

One of the problems resulting from over current is that excessive heat may be generated in power devices; especially MOSFET and Schottky diodes and the temperature of those devices may exceed their specified limits. A protection mechanism has to be used to prevent those power devices from being damaged.


The output over-voltage protection consists of output Zener diode that monitors the voltage on the output terminals. If the voltage on the output terminals exceeds the over-voltage protection threshold, then the Zener diode clamps the output voltage.

Short Circuit Protection

Continuous, hiccup and auto-recovery mode.


DataSheet

Output Voltage Adjustment

30W, Single Output


DataSheet

30W, Single Output

Output voltage set point adjustment allows the user to increase or decrease the output voltage set point of a converter. This is accomplished by connecting an external resistor between the TRIM pin and either the Vo (+) or Vo

(-) pins. With an external resistor between the TRIM and Vo (-) pin, the output voltage set point increases. With an external resistor between the TRIM and Vo (+) pin, the output voltage set point decreases.

TRIM TABLE

Trim up (%)

V

OUT

(Volts)=

R

U

(K Ohms)=

Trim down (%)

V

OUT

(Volts)=

R

D

(K Ohms)=

1

1.515

4.578

1

1.485

5.704

2

1.530

2.065

2

1.470

2.571

3

1.545

1.227

3

1.455

1.527

PXD30-xxWS1P5

4

1.560

0.808

4

1.440

5

1.575

0.557

5

1.425

6

1.590

0.389

6

1.410

1.005

0.692

0.483

7

1.605

0.270

7

1.395

0.334

8

1.620

0.180

8

1.380

0.222

9

1.635

0.110

9

1.365

0.135

10

1.650

0.054

10

1.350

0.065

Trim up (%)

V

OUT

(Volts)=

1

2.525

2

2.550

3

2.575

R

U

(K Ohms)= 37.076

16.675

Trim down (%) 1 2

V

OUT

(Volts)=

R

D

(K Ohms)=

2.475

49.641

2.450

22.481

9.874

3

2.425

13.428

PXD30-xxWS2P5

4

2.600

6.474

4

2.400

5

2.625

4.434

5

2.375

6

2.650

3.074

6

2.350

8.902

6.186

4.375

7

2.675

2.102

7

2.325

3.082

8

2.700

1.374

8

2.300

2.112

9

2.725

0.807

9

2.275

1.358

10

2.750

0.354

10

2.250

0.754

PXD30-xxWS3P3

V

OUT

(Volts)= 3.333

3.366

3.399

3.432

R

U

(K Ohms)= 57.930

26.165

15.577

10.283

Trim down (%) 1 2 3 4

V

Trim up (%)

OUT

(Volts)=

R

D

(K Ohms)=

1

3.267

69.470

2

3.234

31.235

3

3.201

18.490

4

3.168

12.117

5

3.465

7.106

5

3.135

8.294

6

3.498

4.988

6

3.102

5.745

7

3.531

3.476

7

3.069

3.924

8

3.564

2.341

8

3.036

2.559

9

3.597

1.459

9

3.003

1.497

10

3.630

0.753

10

2.970

0.647

Trim up (%) 1 2

V

OUT

(Volts)= 5.050

5.100

R

U

(K Ohms)= 36.570

16.580

Trim down (%)

V

OUT

(Volts)=

R

D

(K Ohms)=

1

4.950

2

4.900

3

5.150

9.917

3

4.850

45.533

20.612

12.306

PXD30-xxWS05

4

5.200

6.585

5

5.250

4.586

4

4.800

8.152

5

4.750

5.660

6

5.300

3.253

6

4.700

3.999

7

5.350

2.302

7

4.650

2.812

8

5.400

1.588

8

4.600

1.922

9

5.450

1.032

9

4.550

1.230

10

5.500

0.588

10

4.500

0.676


DataSheet

30W, Single Output

Output Voltage Adjustment (Continued)

TRIM TABLE ( Continued)

Trim up (%)

V

OUT

(Volts)=

1

5.151

2

5.202

3

5.253

R

U

(K Ohms)= 38.135

17.368

10.446

Trim down (%) 1 2 3

V

OUT

(Volts)=

R

D

(K Ohms)=

5.049

47.191

4.998

21.431

4.947

12.844

PXD30-xxWS5P1

4

5.304

5

5.355

6

5.406

6.985

4

4.896

8.551

4.908

5

4.845

5.975

3.524

6

4.794

4.258

7

5.457

2.535

7

4.743

3.031

8

5.508

1.793

8

4.692

2.111

9

5.559

1.217

9

4.641

1.396

10

5.610

0.755

10

4.590

0.823

PXD30-xxWS12

Trim up (%)

V

OUT

(Volts)=

1

12.120

2

12.240

3

12.360

4

12.480

5

12.600

6

12.720

7

12.840

8

12.960

9

13.080

10

13.200

R

U

(K Ohms)= 367.908

165.954

98.636

64.977

44.782

31.318

21.701

14.488

Trim down (%) 1 2 3 4 5 6 7 8

8.879

9

4.391

10

V

OUT

(Volts)= 11.880

11.760

11.640

11.520

11.400

11.280

11.160

11.040

10.920

R

D

(K Ohms)= 460.992

207.946

123.597

81.423

56.118

39.249

27.199

18.162

11.132

10.800

5.509

PXD30-xxWS15

Trim up (%)

V

OUT

(Volts)=

1

15.150

2

15.300

3

15.450

4

15.600

5

15.750

6

15.900

7

16.050

8

16.200

9

16.350

10

16.500

R

U

(K Ohms)= 404.184

180.592

106.061

68.796

46.437

31.531

20.883

12.898

Trim down (%) 1 2 3 4 5 6 7 8

6.687

9

1.718

10

V

OUT

(Volts)= 14.850

14.700

14.550

14.400

14.250

14.100

13.950

13.800

R

D

(K Ohms)= 499.816

223.408

131.272

85.204

57.563

39.136

25.974

16.102

13.650

8.424

13.500

2.282

Thermal Consideration

The converter operates in a variety of thermal environments.; however, sufficient cooling should be provided to help ensure reliable operation of the unit. Heat is removed by conduction, convection, and radiation to the surrounding environment. Proper cooling can be verified by measuring the point as shown in the figure below. The temperature at this location should not exceed 105°C. When operating, adequate cooling must be provided to maintain the test point temperature at or below 105°C. Although the maximum point temperature of the power modules is 105°C, limiting this temperature to a lower value will increase the reliability of this device.

Measurement shown in inches (mm) TOP VIEW


DataSheet

30W, Single Output

Heat Sink Consideration

Use heat-sink (7G-0020C) for lowering temperature; thus increasing the reliability of the converter.

Heatsink + Clamp

Heatsink

Measurement shown in inches and (millimeters)


DataSheet

30W, Single Output

Remote ON/OFF Control

Positive Logic – (no suffix) , the positive logic remote ON/OFF control circuit is included. Ex.: PXD30-24WS05

Turns the converter ON during logic High on the On/Off pin and turns the converter OFF during logic Low.

The On/Off pin is an open collector/drain logic input signal (Von/off) that is referenced to GND.

If not using the remote on/off feature, an open circuit between on/off pin and (–) input pin is needed to turn the module on.

Negative Logic – (suffix -N), the negative logic remote ON/OFF control circuit is included. Ex.:

PXD30-24WS05-N

Turns the converter ON during logic Low on the On/Off pin and turns the converter OFF during logic High.

The On/Off pin is an open collector/drain logic input signal (Von/off) that is referenced to GND.

If not using the remote on/off feature, a short circuit between on/off pin and (–) input pin is needed to turn the module on.

Remote ON/OFF Implementation

Isolated-Control Remote ON/OFF

Level Control Using TTL Output

Level Control Using Line Voltage


DataSheet

30W, Single Output

Mechanical Data

1.00(25.4)

0.200(5.08)

0.600(15.24) 0.200(5.10)

0.40(10.2)

PIN

1

2

5

6

3

4

PIN CONNECTION

FUNCTION

+ INPUT

- INPUT

CTRL

+OUTPUT

- OUTPUT

TRIM

3 2 1

BOTTOM

VIEW

EXTERNAL OUTPUT TRIMMING

Output can be externally trimmed by using the method shown below.

6

TRIM UP

6

TRIM DOWN

R

U

5 4

0.300(7.62)

6 5

0.700(17.78)

4

0.100(2.54)

0.200(5.10)

0.22(5.6)

1.00(25.4)

0.600(15.24)

Recommended Pad Layout

0.200(5.08)

1.All dimensions in Inches (mm)

Tolerance: X.XX±0.02 (X.X±0.5)

X.XXX±0.01 (X.XX±0.25)

2. Pin pitch tolerance ±0.01(0.25)

3. Pin dimension tolerance ±0.004 (0.1)

1 2

AA VIEW

3

TOP VIEW

KEEP OUT AREA

0.100(2.54)

4 5 6

0.700(17.78)

0.300(7.62)


DataSheet

30W, Single Output

1.All dimensions in Inches (mm)

Tolerance: X.XX±0.02 (X.X±0.5)

X.XXX±0.01 (X.XX±0.25)

2. Pin pitch tolerance ±0.01(0.25)

3. Pin dimension tolerance ±0.004 (0.1)

Soldering and Reflow Considerations

Lead free wave solder profile for PXE30-xxWSxx series.

Zone Reference Parameter

Preheat zone Rise temp. speed : 3°C

℃/ sec max.

Preheat temp. : 100~130°C

Actual heating Peak temp. : 250~260°C

Peak time (T1+T2 time) : 4~6 sec

Reference Solder: Sn-Ag-Cu / ；Sn-Cu

Hand Welding: Soldering iron - Power 90W

Welding Time:：2-4 sec

Temp.：380-400°C ℃


DataSheet

TUBE

TRAY

Packaging Information

20 PCS per TUBE

20 PCS per TRAY

30W, Single Output


DataSheet

30W, Single Output

Max. Output Power

30Watts

Input Voltage Range

24 : 9 ~ 36V

48 : 18 ~ 75V

Part Number Structure

PXD 30 – 24 WS 05 –N

4 : 1 Wide Input

Range

Single Output

Remote ON/OFF Options

No Suffix = Positive Logic

Suffix –N = Negative Logic

Output Voltage

1P5 : 1.5Vdc

2P5 : 2.5Vdc

3P3 : 3.3Vdc

05 : 5Vdc

5P1 : 5.1Vdc

12 : 12Vdc

15 : 15Vdc

Model

Number

Input

Range

Output

Voltage

PXD30-24WS1P5

PXD30-24WS2P5

PXD30-24WS3P3

PXD30-24WS05

PXD30-24WS5P1

PXD30-24WS12

18 – 36 VDC

18 – 36 VDC

18 – 36 VDC

18 – 36 VDC

18 – 36 VDC

18 – 36 VDC

1.5 VDC

2.5 VDC

3.3 VDC

5 VDC

5 .1VDC

12 VDC

PXD30-24WS15

PXD30-48WS1P5

PXD30-48WS2P5

PXD30-48WS3P3

PXD30-48WS05

18 – 36 VDC

36 – 75 VDC

36 – 75 VDC

36 – 75 VDC

36 – 75 VDC

15 VDC

1.5 VDC

2.5 VDC

3.3 VDC

5 VDC

PXD30-48WS5P1

PXD30-48WS12

36 – 75 VDC

36 – 75 VDC

5 .1VDC

12 VDC

PXD30-48WS15 36 – 75 VDC 15 VDC

Note 1. Maximum value at nominal input voltage and full load.

Note 2. Typical value at nominal input voltage and full load.

Output Current Input Current

Max. Load Full Load

(1)

8500mA

8000mA

7500mA

6000mA

6000mA

2500mA

2000mA

8500mA

8000mA

7500mA

6000mA

6000mA

2500mA

2000mA

700

1054

1258

1488

1517

1471

1471

350

520

629

744

759

727

718

Eff

(2)

(%)

80

83

86

88

88

89

89

80

84

86

88

88

90

91

Safety and Installation Instruction

Fusing Consideration

Caution: This converter is not internally fused. An input line fuse must always be used.

This encapsulated converter can be used in a wide variety of applications, ranging from simple stand-alone operation to an integrated part of a sophisticated power architecture. For maximum flexibility, internal fusing is not included; however, to achieve maximum safety and system protection, always use an input line fuse. The safety agencies require a slow-blow fuse with maximum rating of 10A based on the information provided in this data sheet on inrush energy and maximum dc input current; the same type of fuse with lower rating can be used. Refer to the fuse manufacturer’s data for further information.

MTBF and Reliability

The MTBF of PXD30-xxWSxx DC/DC converters has been calculated using:

Bellcore TR-NWT-000332 Case I: 50% stress, Operating Temperature at 40°C ℃ (Ground fixed and controlled environment ). The resulting figure for MTBF is 3.173×10

6 hours.

MIL-HDBK 217F NOTICE2 FULL LOAD, Operating Temperature at 25°C ℃. The resulting figure for MTBF is

5.548×10

5 hours.


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