TNY264P_1

Manufacturer Part NumberTNY264P_1
Description2.4W Cell Phone Charger
ManufacturerPOWERINT [Power Integrations, Inc.]
TNY264P_1 datasheet
 


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Design Example Report
Title
2.4W Charger using TNY264P
Input: 90 - 265 VAC
Specification
Output: 6V / 0.4A
Application
Cell Phone Charger
Author
Power Integrations Applications Department
Document
DER-4
Number
Date
February 4, 2004
Revision
1.0
Summary and Features
This report details the design of an isolated Flyback converter for a wall mount adapter.
Uses TinySwitch TNY264P
Universal input voltage
Typical Efficiency 62 % at 400 mA load
Meets EN550022 Class B EMI tests with No Y capacitor
Very low earth leakage current
Meets tight CC over temperature with no thermistor
The products and applications illustrated herein (including circuits external to the products and transformer
construction) may be covered by one or more U.S. and foreign patents or potentially by pending U.S. and foreign
patent applications assigned to Power Integrations. A complete list of Power Integrations’ patents may be found at
www.powerint.com
5245 Hellyer Avenue, San Jose, CA 95138 USA.
Applications Hotline: Tel: +1 408 414 9660 Fax: +1 408 414 9760
Power Integrations
www.powerint.com

TNY264P_1 Summary of contents

  • Page 1

    Design Example Report Title 2.4W Charger using TNY264P Input 265 VAC Specification Output 0.4A Application Cell Phone Charger Author Power Integrations Applications Department Document DER-4 Number Date February 4, 2004 Revision 1.0 Summary and Features This ...

  • Page 2

    DER-4 1 Introduction................................................................................................................. 5 2 Power Supply Specification ........................................................................................ 5 3 Schematic................................................................................................................... 6 4 PCB Layout ................................................................................................................ 7 5 Bill Of Materials .......................................................................................................... 8 6 Transformer................................................................................................................ 9 6.1 Transformer Winding .............................................................................................. 9 6.2 Electrical Specifications .......................................................................................... 9 6.3 Materials ................................................................................................................. ...

  • Page 3

    DER-4 Figure 1 – Flyback Converter – 2.4W 6V 0.4A................................................................................................ 6 Figure 2 – PCB Layout .................................................................................................................................... 7 Figure 3 – Transformer Winding...................................................................................................................... 9 Figure 4 – Transformer construction ............................................................................................................. 10 Figure 5 – Efficiency Vs Output Current ........................................................................................................ 12 ...

  • Page 4

    DER-4 Page 2.4W Cell Phone Charger Tel: +1 408 414 9660 Fax: +1 408 414 9760 February 4, 2004 Power Integrations www.powerint.com ...

  • Page 5

    DER-4 1 Introduction This document is an engineering report giving performance characteristics of an isolated Flyback converter with universal input voltage and 6V 0.4A output characteristics. This design uses TinySwitch – an integrated IC comprising a high ...

  • Page 6

    ...

  • Page 7

    DER-4 4 PCB Layout Page 2.4W Cell Phone Charger Figure 2 – PCB Layout Tel: +1 408 414 9660 Fax: +1 408 414 9760 February 4, 2004 Power Integrations www.powerint.com ...

  • Page 8

    DER-4 5 Bill Of Materials Item Qty Reference 1 1 BR1 ...

  • Page 9

    DER-4 6 Transformer 6.1 Transformer Winding W1,Core cancellation wndg, 27T,#36x2 W2,Primary, 106T,#36 W3,Shield Wndg, 10T,#35x5 6.2 Electrical Specifications 60Hz 1minute, from Pins 3-5 to Electrical Strength Pins 6-8 Primary Inductance All windings open (Pin 3 to Pin 5) Resonant Frequency ...

  • Page 10

    DER-4 6.4 Transformer Construction Pins 6-10 W4-finish(P6) W4-start(P8) Page 2.4W Cell Phone Charger Figure 4 – Transformer construction Tel: +1 408 414 9660 Fax: +1 408 414 9760 February 4, 2004 0.311",2mils Pins 1-5 Insulation Tape, 1 ...

  • Page 11

    DER-4 6.5 Winding Instructions Place the bobbin on the winding machine with pins 1-5 on the right side and pins 6-10 on the left side. W1 (Shield/ core Wind 27 turns from right to left with # ...

  • Page 12

    DER-4 7 Performance Data All measurements are performed at room temperature unless otherwise specified. The output voltages are measured at the end of a 6-foot cable with 0.2 Ω total resistance. 7.1 Efficiency The measurements are made for various load ...

  • Page 13

    DER-4 7.2 Regulation 7.3 No Load Input Power 300 250 200 150 100 50 Page 2.4W Cell Phone Charger Load Regulation Vin = 90 Vac Vin = 120 ...

  • Page 14

    DER-4 7.4 Output Ripple Measurements 7.4.1 Ripple Measurement Technique For DC output ripple measurements, a modified oscilloscope test probe must be utilized in order to reduce spurious signals due to pickup. Details of the probe modification are provided in Figure ...

  • Page 15

    DER-4 7.4.2 Output Voltage Ripple Figure 10 – Output Voltage Ripple (worst case) at Vin = 264 Vac 6 400 mA Page 2.4W Cell Phone Charger Tel: +1 408 414 9660 Fax: ...

  • Page 16

    DER-4 8 EMI Tests The EMI tests are done at 110 Vac and 220 Vac inputs, Line (worst case) and 15 Ω (395 mA approx.) load. To obtain more margin in radiated EMI, use L3 = Long ferrite bead. With ...

  • Page 17

    DER-4 Figure 13 – EN55022 Class B, 110 Vac, Line (worst case), no artificial hand connected to output Figure 14 – EN55022 Class B, 220 Vac, Line (worst case), no artificial hand connected to output Page 2.4W ...

  • Page 18

    DER-4 9 Revision History Date Author February 4, 2004 MJ Page 2.4W Cell Phone Charger Revision Description & changes 1.0 First Release Tel: +1 408 414 9660 Fax: +1 408 414 9760 February 4, 2004 Reviewed AM/VC ...

  • Page 19

    DER-4 Page 2.4W Cell Phone Charger Notes Tel: +1 408 414 9660 Fax: +1 408 414 9760 February 4, 2004 Power Integrations www.powerint.com ...

  • Page 20

    DER-4 For the latest updates, visit our Web site: www.powerint.com Power Integrations reserves the right to make changes to its products at any time to improve reliability or manufacturability. Power Integrations does not assume any liability arising from the use ...