DI-60
Typical applications are chargers for cell phones, PDAs,
portableaudiodevicesandshaversorpowersourcesembedded
withinhomeappliancesandconsumerelectronics,suchasTV
standby and bias supplies.
300
250
200
Key Design Points
150
100
50
• Set VOR within 36 V to 60 V (50 V being optimum)
• 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
0
60
90 120 150 180 210 240 270
Input Voltage (VAC)
Figure 3. No Load Input Power Consumption.
6.5
6.0
5.5
5.0
4.5
TRANSFORMER PARAMETERS
TDK PC40 EE13, AL = 182 nH/T2
Core Material
Bobbin
EE13 Horizontal 8 pin
115 VAC
230 VAC
Low Limit
High Limit
4.0
3.5
Bias: 39T, 34 AWG
Primary: 114T, 34 AWG
Shield: 13.5T, 2 x 31 AWG
Secondary: 12T, 26 AWG (TIW)
Winding Details
3.0
2.5
2.0
1.5
1.0
0.5
Bias (4-3), tape,
Primary (2-1), tape,
Shield (1-open), tape,
Secondary (6-5), tape
Winding Order (pin numbers)
2.36 mH ±10%
0
Primary Inductance
50
150
250
350
450 550
300 kHz (minimum)
Primary Resonant Frequency
Output Current (A)
Figure 2. Load Regulation–CV/CC Characteristics.
Table 1. Transformer Construction Information.
For the latest updates, visit www.powerint.com
PowerIntegrationsmaymakechangestoitsproductsatanytime. PowerIntegrationshasnoliabilityarisingfromyouruseofanyinformation, deviceorcircuitdescribed
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.
The PI logo, TOPSwitch, TinySwitch, LinkSwitch, DPA-Switch and EcoSmartare registered trademarks of Power Integrations. PI Expertand
PI FACTS are trademarks of Power Integrations. Copyright 2004, Power Integrations
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12/04
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