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DI-43 Fiches technique(PDF) 2 Page - Power Integrations, Inc.

No de pièce DI-43
Description  30 W, Universal Input, 12 V Supply with <250 mW No-load
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Fabricant  POWERINT [Power Integrations, Inc.]
Site Internet  http://www.powerint.com
Logo POWERINT - Power Integrations, Inc.

DI-43 Fiches technique(HTML) 2 Page - Power Integrations, Inc.

  DI-43 Datasheet HTML 1Page - Power Integrations, Inc. DI-43 Datasheet HTML 2Page - Power Integrations, Inc.  
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www.powerint.com
A
11/02
DI-43
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 of any device or circuit described herein, nor does it convey any
license under its patent rights or the rights of others. 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.
The PI Logo, TOPSwitch, TinySwitch, LinkSwitch and EcoSmart are registered trademarks of Power Integrations, Inc.
PI Expert is a trademark of Power Integrations, Inc. ©Copyright 2002, Power Integrations, Inc.
WORLD HEADQUARTERS
AMERICAS
Power Integrations, Inc.
San Jose, CA 95138 USA
Customer Service:
Phone:
+1 408-414-9665
Fax:
+1 408-414-9765
e-mail: usasales@powerint.com
CHINA
Power Integrations International
Holdings, Inc.
China
Phone:
+86-755-8367-5143
Fax:
+86-755-8377-9610
e-mail: chinasales@powerint.com
SINGAPORE
Power Integrations, Singapore
Republic of Singapore 308900
Phone:
+65-6358-2160
Fax:
+65-6358-2015
e-mail: singaporesales@powerint.com
JAPAN
Power Integrations, K.K.
Keihin-Tatemono 1st Bldg.
Japan
Phone:
+81-45-471-1021
Fax:
+81-45-471-3717
e-mail: japansales@powerint.com
EUROPE & AFRICA
Power Integrations (Europe) Ltd.
United Kingdom
Phone:
+44-1344-462-300
Fax:
+44-1344-311-732
e-mail: eurosales@powerint.com
KOREA
Power Integrations
International Holdings, Inc.
Seoul, Korea
Phone:
+82-2-782-2840
Fax:
+82-2-782-4427
e-mail: koreasales@powerint.com
TAIWAN
Power Integrations
International Holdings, Inc.
Taipei, Taiwan
Phone:
+886-2-2727-1221
Fax:
+886-2-2727-1223
e-mail: taiwansales@powerint.com
INDIA (Technical Support)
Innovatech
Bangalore, India
Phone:
+91-80-226-6023
Fax:
+91-80-228-9727
e-mail: indiasales@powerint.com
APPLICATIONS HOTLINE
APPLICATIONS FAX
World Wide +1-408-414-9660
World Wide +1-408-414-9760
Figure 2. P
IN vs VIN Curve.
Table 1. Transformer Construction Information.
Optional components D4, C11, and R7 implement soft finish
to limit startup overshoot. Resistor R7 discharges this soft-
finish capacitor at power down.
Key Design Points
• Use reflected voltage from 90 V to 120 V
• Compact layout for components D3, C6 and C7 will
improve efficiency. Make sure the both capacitors C6 and
C7 have equal secondary loop areas to balance the ripple
currents in each.
• Clamp: for lowest cost use an RCD clamp replacing Zener
VR1 with a power resistor. For best no-load performance,
use the Zener clamp as shown.
•Reference voltage: Use low current Zener secondary
reference with 5 mA bias current for lowest cost. Use
TL431 as shown for both better regulation accuracy and
no-load consumption (due to lower bias current 1 mA).
80
120
AC Input Voltage
.20
.15
.10
.05
0
.25
.30
.35
160
200
240
280
TRANSFORMER PARAMETERS
Core Material
EF25 Nippon Ceramic NC-2H
A
LG of 264 nH/T
2
Bobbin
EF25 10 pin
(Miles Platts FE0100 with TBS-601)
Winding Details
1/2 Primary, tape, 1/2 primary (1-3),
tape, Bias (5-4), tape,
12 V (9-10, 6-7), tape
Inductance
Primary: 876
µH ± 10% at 132 kHz,
Leakage: 28
µH (maximum)
Primary Resonant Frequency
570 kHz (minimum)
Winding Order
(Pin Numbers)
Primary: 58T x 26 AWG
Bias: 2T x 26 AWG
12 V: 6T 4 x 25 AWG T.I.W.
(T.I.W. = Triple Insulated Wire)


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