TOP245P_1 POWERINT [Power Integrations, Inc.], TOP245P_1 Datasheet - Page 2

• Manufacturer Part Number: TOP245P_1
• Description: Title 32W (47W peak) Multiple Output supply
• Manufacturer: POWERINT [Power Integrations, Inc.]

DER-19
1
2
3
4
5
6
7
8
9
10
11
12
13
4.1
4.2
4.3
4.4
7.1
7.2
7.3
7.4
7.5
9.1
9.2
9.3
9.4
9.5
11.1 Drain Voltage and Current, Normal Operation .................................................. 18
11.2 Output Voltage Start-up Profile (Full Power) ..................................................... 19
11.3 Drain Voltage and Current Start-up Profile ....................................................... 20
11.4 Load Transient Response ................................................................................. 20
11.5 Output Ripple Measurements ........................................................................... 21
Introduction ................................................................................................................ 4
Power Supply Specification........................................................................................ 5
Schematic .................................................................................................................. 6
Circuit Description ...................................................................................................... 7
PCB Layout................................................................................................................ 8
Bill Of Materials .......................................................................................................... 9
Transformer Specification ........................................................................................ 10
Transformer Spreadsheets ...................................................................................... 12
Performance Data .................................................................................................... 15
9.4.1
9.4.2
11.5.1
11.5.2
Thermal Performance........................................................................................... 18
Waveforms ........................................................................................................... 18
Conducted EMI..................................................................................................... 24
Revision History.................................................................................................... 25
Input EMI Filtering............................................................................................... 7
TOPSwitch Primary............................................................................................. 7
Output Rectification............................................................................................. 7
Output Feedback ................................................................................................ 7
Electrical Diagram............................................................................................. 10
Electrical Specifications .................................................................................... 10
Materials ........................................................................................................... 10
Transformer Build Diagram ............................................................................... 11
Transformer Construction ................................................................................. 11
Efficiency........................................................................................................... 15
No-load Input Power ......................................................................................... 16
Peak Power....................................................................................................... 16
Regulation......................................................................................................... 16
Cross Regulation .............................................................................................. 17
Power Integrations, Inc.
Tel: [phone] Fax: [phone]
www.powerint.com
Load........................................................................................................... 16
Line ............................................................................................................ 17
Ripple Measurement Technique ................................................................ 21
Measurement Results ................................................................................ 22
TOP245P Multiple Output Set Top Box
Table Of Contents
March 30, 2004
Page 2 of 25