iw1706-00 for 12v 600ma network adapter design

Reference Design

iW1706-00 for 12V 600mA Network Adapter Design

EBC10011

Table of Contents

www.iwatt.comRev. 1.1 EBC10011 aPR, 2012

1.0. Introduction ....................................................................................................................................................................3

2.0. Design Features ............................................................................................................................................................3

3.0. Power Supply Design Specification ...............................................................................................................................4

4.0. Schematic ......................................................................................................................................................................5

5.0. PCB Layout ....................................................................................................................................................................5

6.0. Bill Of Materials ..............................................................................................................................................................6

7.0. Transformer drawing ......................................................................................................................................................7

8.0. Performance ..................................................................................................................................................................8

8.1. Regulation, Ripple and Efficiency Measurement ......................................................................................................8

8.2. CV and CC Regulation ........................................................................................................................................8

8.3. Conducted EMI .................................................................................................................................................8

iW1706-00 For Network Adapter Design(AC Input 90–264VAC, Output 12V 600mA)EBC10011

12V 600mA Network Adapter with iW1706-00 EBC10011

www.iwatt.com

Rev. 1.1 EBC10011 aPR, 2012

1.0 Introduction

AC input range 90-264VAC

DC output 12V 600mA

Meet “150mW” no-load standby power consumption requirement

Meet “EPA 2.0” requirement at end of output DC-Cable

Max ripple < 150mVP_P

No Y-Cap design

2.0 Design Features

AC Input DC Output

EE1614

N L

33mm

iW1706-00-(No Cable -Drop -Compensation)

50mm

This document provides a reference design for a universal input, 12V 600mA isolated flyback network adapter. For this design the iW1706-00 is used. It contains the complete specification of the power supply, a detailed circuit diagram, the entire bill of materials required to build the power supply, drawing of the power transformer, and test data of the most important performance.

Figure 1.1 PCB Top View

Figure 1.2 PCB Bottom View


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Rev. 1.1 EBC10011 aPR, 2012

3.0 Power Supply Design Specification

Description Symbol Min Typ Max Units Comment

Input

Voltage VIN 90 264 VAC

Frequency fLINE 47 50/60 63 Hz

No-load Input Power (230VAC) 150 mW

Output

Output voltage VOUT 11.4 12.0 12.6 V Measured at the end of DC-Cable

Output current IOUT 0 0.6 A

Output ripple voltage VRIPPLE 150 mVP_P

Measured at end of output DC-CableIOUT=0.6A @TA = 25 °C20 MHz bandwidth

Total Output Power

Continuous output power POUT 7.2 W

Over-current protection IOUT_MAX 0.9 A Auto-restart

Active mode protection η 74.6 % Measured at the end of DC-Cable, VIN=115VAC and 230VAC (TAMB = 25 °C)

Environmental

Conducted EMI Meets CISPR22B / EN55022B

Safety Designed to meet IEC950, UL1950 Class II

Ambient temperature TAMB 0 40 °C

The table below represents the minimum acceptable performance of the design.


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Rev. 1.1 EBC10011 aPR, 2012

AC Input V +

V -

+

U1iW1706 - 00

L1

L2

C16.8 μF

C26.8 μF

F1

L

N

10Ω

D7SR260

T1EE16

10 kΩ

R31 MΩ

R41 MΩ

2.2 ΩR10

24 kΩR8

3.6 ΩR7

FR102D6

4.49 kΩR9 C5C4

C7470 µF

16 V

+

+

+

V1

2

5

43

CC OUTPUT

ISENSEVSENSE

GND

C647pF 0.1μF

MJE13003Q1

D1

D3

D2

D4

1N4007

1N4007

1N4007

1N4007

470 μH

4.7 kΩR2

5.6 μH R6300 Ω

C3 R5220 kΩ

D5FR107

1 nF1 kV

R11

10μF

4.0 Schematic

5.0 PCB Layout

Figure 4.1 Design Schematic

Figure 5.1 PCB Layout 50 mm x 33 mm

PCB Top PCB Bottom


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Rev. 1.1 EBC10011 aPR, 2012

6.0 Bill of Materials

Item Qty. Ref. Description Manufacturer P/N Manufacturer

1 1 IC1 iW1706-00, off-line digital PSR & VMS PWM controller, SOT23-5 iW1706-00 iWatt, Inc

2 2 C1,C2 6.8μF, 400V, E-CAP, (Φ10mm×12mm) KLH-400V6R8MG125 KOSHIN3 1 C3 1nF, 1KV, ceramic capacitor CK45-R3AD102K-NR TDK Corporation4 1 C4 10μF, 50V, low ESR E-CAP, (Ф5mmX11.5mm) KLH-050V100MC100 KOSHIN5 1 C5 0.1μF, 25V, X7R, SMD-0603 C1608X7R1E104K TDK Corporation6 1 C6 47pF, 25V, X7R, SMD-0603 06033A470KAT4A AVX Corporation7 1 C7 470μF, 16V, low ESR E-CAP, (Ф8mmX12mm) EKMG160ELL471MHB5D United Chemi-Con8 1 R2 4.7KΩ, ±5%, SMD-0805 ERJ-6GEYJ472V Panasonic - ECG9 2 R3,R4 1MΩ, ±5%, SMD-1206 ERJ-8GEYJ105V Panasonic - ECG

10 1 R5 220KΩ, ±5%, SMD-1206 ERJ-8GEYJ224V Panasonic - ECG11 1 R6 300Ω, ±5%, SMD-0805 ERJ-6GEYJ301V Panasonic - ECG12 1 R7 3.6Ω, ±1%, SMD-0805 CRCW08053R60FKEA Vishay Dale13 1 R8 24KΩ, ±1%, SMD-0805 CRCW080524K0FKEA Vishay Dale14 1 R9 4.49KΩ, ±1%, SMD-080515 1 R10 2.2Ω, ±1%, SMD-1206 ERJ-8RQF2R2V Panasonic - ECG16 1 R11 10KΩ, ±5%, SMD-0805 ERJ-6GEYJ103V Panasonic - ECG17 4 D1,D2,D3,D4 1A, 1000V, rectifier diode, DO-41 1N4007 Taiwan Semiconductor 18 1 D5 1A, 1000V, fast recovery rectifier, DO-41 FR107 Taiwan Semiconductor 19 1 D6 1A, 100V, fast recovery rectifier, DO-41 FR102 Taiwan Semiconductor20 1 D7 2A, 60V, Schottky diode, DO-15 SR260 Won-Top Electronics21 1 F1 10Ω, fusible resistor, 1W FRM1WJT-52-10R Yageo22 1 L1 5.6μH, color ring inductor, 0510 8230-38-RC JW Miller A Bourns23 1 L2 470μH, color ring inductor, 0510 8230-84-RC JW Miller A Bourns24 1 Q1 1.5A, 800V,NPN transistor, TO-126 HMJE13003 HSMC CORP25 1 T1 EE1614, transformer, horizontal type


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Rev. 1.1 EBC10011 aPR, 2012

Schematic:

Electrical Specifications:1. Primary inductance (Lp) = 1.55mH ± (7%) @10KHz2. Primary leakage inductance (Lk) < 5% * Lp 3. Electrical strength = 3KV, 50/60Hz, 1Min.

Materials:1. Core: EE1614 (ferrite material TDK PC40 or equivalent)2. Bobbin: EE16 horizontal3. Magnet wires (pri): type 2-UEW4. Magnet wire (sec): triple insulated wires 5. Layer insulation tape : 3M1298 or equivalent

Finished:1. Varnish the complete assembly

7.0 Transformer drawing

10

6

12Ts

15Ts

5

2

3

Bias

Secondary 128TsPrimary

1

Note:• Dot () denotes electrical

start.

• Electrical start could be different from mechanical or winding start.


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Rev. 1.1 EBC10011 aPR, 2012

8.0 Performance

8.1 Regulation, Ripple and Efficiency Measurement

* Note: Output voltage is measured at end of PCB

Vin(VAC)

Pin(W)

Vout(V)

Iout(mA)

VRIPPLE

(mVP-P)Pout(W)

η(%)

OCP(mA)

Average η(%)

90

0.062 11.90 0 10

701 77.71 2.286 11.99 150 46 1.80 78.67 4.560 11.98 300 76 3.59 78.82 6.980 12.01 450 68 5.40 77.43 9.506 12.03 600 110 7.22 75.93

115

0.070 11.91 0 8

700 79.75 2.272 11.98 150 46 1.80 79.09 4.469 11.98 300 62 3.59 80.42 6.740 12.01 450 66 5.40 80.19 9.100 12.03 600 82 7.22 79.32

230

0.120 11.90 0 8

713 78.88 2.381 11.98 150 56 1.80 75.47 4.557 11.99 300 58 3.60 78.93 6.726 11.99 450 68 5.40 80.22 8.921 12.03 600 76 7.22 80.91

264

0.167 11.90 0 10

706 77.78 2.433 11.98 150 42 1.80 73.86 4.631 11.99 300 64 3.60 77.67 6.803 11.99 450 74 5.40 79.31 8.993 12.03 600 72 7.22 80.26

8.2 CV and CC Regulation 8.3 Conducted EMI

Vin=230VAC/50Hz, Live

Vin=230VAC/50Hz, Neutral

Frequency(MHz)

Frequency(MHz)

Ampl

itude

(dBμ

V)Am

plitu

de(d

BμV)

V OUT

(V)

IOUT (mA)

V OUT

(V)

IOUT (mA)

0 100 200 300 400 500 600 700 800

18.0

12.0

9.0

6.0

3.0

0.0

15.0

0 100 200 300 400 500 600 700 800

18.0

12.0

9.0

6.0

3.0

0.0

15.0

VI Curve (Vin=90VAC/50Hz)

VI Curve (Vin=264VAC/50Hz)

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Rev. 1.1 EBC10011 aPR, 2012

Trademark Information

© 2012 iWatt, Inc. All rights reserved. iWatt, BroadLED, EZ-EMI, Flickerless, Intelligent AC-DC and LED Power, and PrimAccurate are trademarks of iWatt, Inc. All other trademarks and registered trademarks are the property of their respective owners.

Contact Information

Web: http://www.iwatt.comE-mail: [email protected]: +1 (408) 374-4200Fax: +1 (408) 341-0455

iWatt Inc.

675 Campbell Technology Parkway, Suite 150Campbell, CA 95008

DisclaimeriWatt reserves the right to make changes to its products and to discontinue products without notice. The applications information, schematic diagrams, and other reference information included herein is provided as a design aid only and are therefore provided as-is. iWatt makes no warranties with respect to this information and disclaims any implied warranties of merchantability or non-infringement of third-party intellectual property rights.

iWatt cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in an iWatt product. No circuit patent licenses are implied.

Certain applications using semiconductor products may involve potential risks of death, personal injury, or severe property or environmental damage (“Critical Applications”).

IWATT SEMICONDUCTOR PRODUCTS ARE NOT DESIGNED, INTENDED, AUTHORIZED, OR WARRANTED TO BE SUITABLE FOR USE IN LIFE-SUPPORT APPLICATIONS, DEVICES OR SYSTEMS, OR OTHER CRITICAL APPLICATIONS.

Inclusion of iWatt products in critical applications is understood to be fully at the risk of the customer. Questions concerning potential risk applications should be directed to iWatt, Inc.

iWatt semiconductors are typically used in power supplies in which high voltages are present during operation. High-voltage safety precautions should be observed in design and operation to minimize the chance of injury.

iw1706-00 for 12v 600ma network adapter design

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