DI-34 Просмотр технического описания (PDF) - Power Integrations, Inc
Номер в каталоге
Компоненты Описание
производитель
DI-34 Datasheet PDF : 2 Pages
| |||
DI-34
Key Design Points
• Use K (ripple-to-peak current ratio) in the range of 0.4 to
RP
0.6 and VOR (output reflected voltage) of 90 V to
110 V for best efficiency.
• Use low cost optocoupler - gain is non-critical.
• PCB traces which carry high switching voltages and current
should be short and wide to reduce EMI.
• Reduce leakage inductance by filling each winding layer
across the entire width of the bobbin.
• R4 should be large enough to limit dissipation, to meet
<300 mW no-load target, while still limiting peak DRAIN
voltage to a safe value – 200 kΩ is a good start value for
most designs.
• A layer of insulation tape between each layer of primary
winding will further reduce inter-winding capacitance and
therefore switching losses.
• Ferrite bead L2 reduces radiated EMI.
300
IO = 0 A
250
80
70
QP
60
AV
50
Quasi Peak
40
30
20
10
Average
0
-10
-20
0.15
1.0
10.0
Frequency (MHz)
-100.0
Figure 3. Conducted Emissions–EN55022 Class B (QP and AVG),
5 V, 1 A, 230 VAC, with Artificial Hand Connected to
Secondary Return.
TRANSFORMER PARAMETERS
200
Core
EE16, Nippon Ceramic NC-2H or
equivalent, AL = 135 nH/T2
Bobbin
EEL16 Vertical
150
Winding Order
Shield (1-NC), Primary (4-1), Shield
(pin numbers)
(3-2), and Secondary (10-8).
100
Primary Inductance
(Pins 1-4 all others open)
1660 µH ±10%
50
Primary Resonant
Frequency (Pins 1-4, all
400 kHz (minimum)
0
other open)
50 100 150 200 250 300
Input Voltage (VAC)
Leakage Inductance
(Pins 1-4, with Pins 8-14
shorted)
70 µH (maximum)
Figure 2. No-load Input Power Consumption.
Table 1. Transformer Design Parameters.
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 2003, 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
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
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
APPLICATIONS HOTLINE
World Wide +1-408-414-9660
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 FAX
World Wide +1-408-414-9760
B
5/03
www.powerint.com
Share Link: 