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TOP243P Datasheet(PDF) 2 Page - Power Integrations, Inc. |
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TOP243P Datasheet(HTML) 2 Page - Power Integrations, Inc. |
2 / 48 page TOP242-249 2 E 7/01 August 8, 2000 Section List Functional Block Diagram ......................................................................................................................................... 3 Pin Functional Description ........................................................................................................................................ 4 TOPSwitch-GX Family Functional Description ........................................................................................................ 5 CONTROL (C) Pin Operation ................................................................................................................................. 6 Oscillator and Switching Frequency ....................................................................................................................... 6 Pulse Width Modulator and Maximum Duty Cycle ................................................................................................. 7 Light Load Frequency Reduction ............................................................................................................................ 7 Error Amplifier ......................................................................................................................................................... 7 On-chip Current Limit with External Programmability ............................................................................................. 7 Line Under-Voltage Detection (UV) ........................................................................................................................ 8 Line Overvoltage Shutdown (OV) ........................................................................................................................... 8 Line Feed Forward with DC MAX Reduction .............................................................................................................. 8 Remote ON/OFF and Synchronization ................................................................................................................... 9 Soft-Start ................................................................................................................................................................ 9 Shutdown/Auto-Restart .......................................................................................................................................... 9 Hysteretic Over-Temperature Protection ................................................................................................................ 9 Bandgap Reference ................................................................................................................................................ 9 High-Voltage Bias Current Source ........................................................................................................................ 10 Using Feature Pins .................................................................................................................................................... 11 FREQUENCY (F) Pin Operation ........................................................................................................................... 11 LINE-SENSE (L) Pin Operation ............................................................................................................................ 11 EXTERNAL CURRENT LIMIT (X) Pin Operation ................................................................................................. 11 MULTI-FUNCTION (M) Pin Operation .................................................................................................................. 12 Typical Uses of FREQUENCY (F) Pin ...................................................................................................................... 15 Typical Uses of LINE-SENSE (L) and EXTERNAL CURRENT LIMIT (X) Pins ....................................................... 16 Typical Uses of MULTI-FUNCTION (M) Pin ............................................................................................................. 19 Application Examples ............................................................................................................................................... 21 A High Efficiency, 30 W, Universal Input Power Supply ........................................................................................ 21 A High Efficiency, Enclosed, 70 W, Universal Adapter Supply .............................................................................. 22 A High Efficiency, 250 W, 250 - 380 VDC Input Power Supply ............................................................................. 23 Multiple Output, 60 W, 185 - 265 VAC Input Power Supply .................................................................................. 24 Processor Controlled Supply Turn On/Off ............................................................................................................ 25 Key Application Considerations .............................................................................................................................. 27 TOPSwitch-II vs. TOPSwitch-GX .......................................................................................................................... 27 TOPSwitch-FX vs. TOPSwitch-GX ....................................................................................................................... 28 TOPSwitch-GX Design Considerations ................................................................................................................ 29 TOPSwitch-GX Layout Considerations ................................................................................................................. 31 Quick Design Checklist ......................................................................................................................................... 31 Design Tools ......................................................................................................................................................... 33 Product Specifications and Test Conditions .......................................................................................................... 34 Typical Performance Characteristics ...................................................................................................................... 41 Part Ordering Information ........................................................................................................................................ 45 Package Outlines ...................................................................................................................................................... 45 |
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