Power Integrations

5245 Hellyer Avenue

San Jose, California 95138

MAIN PHONE NUMBER

APPLICATIONS HOTLINE

APPLICATIONS FAX

For a complete listing of worldwide sales offices,

+1 408-414-9200

+1 408-414-9660

+1 408-414-9760

please visit www.powerint.com

The PI logo, TOPSwitch, TinySwitch, LinkSwitch, DPA-Switch and EcoSmart are registered trademarks of Power Integrations. PI Expert and

PI FACTS

are trademarks of Power Integrations. Copyright 2004, Power Integrations

Power Integrations may make changes to its products at any time. Power Integrations has no liability arising from your use of any information, device or circuit described

herein nor does it convey any license under its patent rights or the rights of others. POWER INTEGRATIONS MAKES NO WARRANTIES HEREIN AND SPECIFICALLY

DISCLAIMS ALL WARRANTIES INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE,

AND NON-INFRINGEMENT OF THIRD PARTY RIGHTS. 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.

For the latest updates, visit www.powerint.com

www.powerint.com

DI-60

B

12/04

Core Material

Bobbin

Winding Details

Winding Order (pin numbers)

Primary Inductance

Primary Resonant Frequency

TRANSFORMER PARAMETERS

Table 1. Transformer Construction Information.

Figure 3. No Load Input Power Consumption.

Figure 2. Load Regulation–CV/CC Characteristics.

EE13 Horizontal 8 pin

Bias: 39T, 34 AWG

Primary: 114T, 34 AWG

Shield: 13.5T, 2 x 31 AWG

Secondary: 12T, 26 AWG (TIW)

Bias (4-3), tape,

Primary (2-1), tape,

Shield (1-open), tape,

Secondary (6-5), tape

2.36 mH ±10%

300 kHz (minimum)

6.5

4.0

4.5

5.0

5.5

6.0

Output Current (A)

0

0.5

1.0

1.5

2.0

3.0

2.5

3.5

450

350

250

150

50

550

115 VAC

230 VAC

Low Limit

High Limit

60

120 150

90

180 210

240 270

Input Voltage (VAC)

150

50

100

0

250

200

300

Typical applications are chargers for cell phones, PDAs,

portable audio devices and shavers or power sources embedded

within home appliances and consumer electronics, such as TV

standby and bias supplies.

Key Design Points

• Set V

•Transformer primary inductance tolerance must be

≤ ±10%, to maintain CC limit tolerances (±25/20%)

• To allow more time for reaching regulation at startup (or

into a fully resistive load), increase C6 to 1

µF

• If battery voltage is less than 2 V, then the LinkSwitch will

not come out of its auto-restart mode

• To lower the ripple voltage into non-battery loads, an LC

filter or LDO must be added onto the output