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參數(shù)資料
| 型號(hào)： | AN-17 |
| 英文描述： | Flyback Transformer Design for TOPSwitch Power Supplies |
| 中文描述： | 回掃變壓器設(shè)計(jì)的TOPSwitch電源 |
| 文件頁(yè)數(shù)： | 12/12頁(yè) |
| 文件大?。?/td> | 133K |
| 代理商： | AN-17 |
AN-17
C
6/96
12
manufacturer needs the following information:
Core part number and gapped effective inductance A
LG
Bobbin part number
Wire gauge and insulation style on all windings
Safety or Electric strength and Creepage distance
specifications
Primary Inductance L
Number of turns (N
, N
S
, N
B
, etc.) for each winding
Bobbin pin connections
Winding layer placement and winding instructions
Temperature class of operation (class A is 105
°
C, class B
is 130
°
C, etc.)
Spreadsheet Improvements
The order of the spreadsheet has been changed to simplify the iteration
process. Reflected voltage V
and ripple to peak current ratio K
are
now independent variables which make peak current Ip and duty cycle
D
dependent variables. Loss allocation factor Z is introduced to
distinguish between power losses occurring before energy is stored in
the transformer (primary losses) and power losses occurring after
energy is released from the transformer (secondary losses). Primary
inductance L
is now calculated from output power P
, K
, efficiency
η
, and loss allocation factor Z. The spreadsheet now takes into account
primary magnet wire insulation thickness as well as the discrete steps
of standard AWG wire sizes. Metric dimensions are used throughout
(with the exception of Circular mils for wire cross sectional area).
Drain Voltage V
now includes an estimate for the effect of leakage
inductance induced voltage spikes on typical primary clamp circuits.
References
Bisci, J., Part IV: Magnet Wire: Selection Determines
Performance, PCIM, October 1994, pp. 37.
Leman, B., Finding the Keys to Flyback Power Supplies
Produces Efficient Design, EDN, April 13, 1995, pp. 101-113.
McLyman, C., Transformer and Inductor Design Handbook,
Marcel Dekker, Inc. 1978
Insulated Wire Sources
Rubudue Wire Company
5150 E. LaPalma Ave, Suite 108
Anaheim Hills, CA 92807 USA
(714) 693-5512
(714) 693-5515 FAX
Furukawa Electric America, Inc.
200 Westpark Dr., Suite 190
Peachtree City, GA 30269 USA
(770) 487-1234
(770) 487-9910 FAX
The Furukawa Electric Co., Ltd.
6-1, Marunouchi 2-chome,
Chiyoda-ku, Tokyo 100, Japan
81-3-3286-3226
81-3-3286-3747 FAX
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 of any device or circuit described herein, nor does it
convey any license under its patent rights or the rights of others.
PI Logo and
TOPSwitch
are registered trademarks of Power Integrations, Inc.
Copyright 1994, Power Integrations, Inc. 477 N. Mathilda Avenue, Sunnyvale, CA 94086
JAPAN
Power Integrations, Inc.
Keihin-Tatemono 1st Bldg.
12-20 Shin-Yokohama 2-Chome.Kohoku-ku
Yokohama-shi, Kanagawa 222
Japan
Phone:
81(0)454711021
Fax:
81(0)454713717
ASIA & OCEANIA
For Your Nearest Sales/Rep Office
Please Contact Customer Service
Phone:
4085239265
Fax:
4085239365
WORLD HEADQUARTERS
Power Integrations, Inc.
477 N. Mathilda Avenue
Sunnyvale, CA 94086
USA
Main:
4085239200
Customer Service:
Phone:
4085239265
Fax:
4085239365
AMERICAS
For Your Nearest Sales/Rep Office
Please Contact Customer Service
Phone:
4085239265
Fax:
4085239365
APPLICATIONS HOTLINE
World Wide
4085239260
APPLICATIONS FAX
Americas
Europe/Africa
44(0)1753622209
Japan
Asia/Oceania
4085239361
81(0)454713717
4085239364
EUROPE & AFRICA
Power Integrations (Europe) Ltd.
Mountbatten House
Fairacres
Windsor SL4 4LE
United Kingdom
Phone:
44(0)1753622208
Fax:
44(0)1753622209
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|---|---|
| AN-18 | TOPSwitch Flyback Transformer Construction Guide |
| AN-19 | TOPSwitch Flyback Power Supply Efficiency |
| AN-20 | Transient Suppression Techniques for TOPSwitch Power Supplies |
| AN-22 | OBSOLETE when inventory is depleted. 10% tolerance no l |
| AN-23 | TinySwitch Flyback Design Methodology |
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