Datasheet TOP242, TOP243, TOP244, TOP245, TOP246, TOP247, TOP248, TOP249, TOP250 (Power Integrations) - 2
| Manufacturer | Power Integrations |
| Description | Extended Power, Design Flexible, EcoSmart, Integrated Off-Line Switcher |
| Pages / Page | 54 / 2 — TOP242-250. Functional Block Diagram. Pin Functional Description. … |
| File Format / Size | PDF / 4.0 Mb |
| Document Language | English |
TOP242-250. Functional Block Diagram. Pin Functional Description. TOPSwitch-GX Family Functional Description
Model Line for this Datasheet
- TOP247F TOP247F-TL TOP247FN TOP247FN-TL TOP247G TOP247G-TL TOP247GN TOP247GN-TL TOP247P TOP247P-TL TOP247PN TOP247PN-TL TOP247R TOP247R-TL TOP247RN TOP247RN-TL TOP247Y TOP247Y-TL TOP247YN TOP247YN-TL
- TOP248F TOP248F-TL TOP248FN TOP248FN-TL TOP248G TOP248G-TL TOP248GN TOP248GN-TL TOP248P TOP248P-TL TOP248PN TOP248PN-TL TOP248R TOP248R-TL TOP248RN TOP248RN-TL TOP248Y TOP248Y-TL TOP248YN TOP248YN-TL
Text Version of Document
TOP242-250
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 Undervoltage Detection (UV) ... 8 Line Overvoltage Shutdown (OV) .. 8 Line Feed-Forward with DC Reduction .. 8 MAX Remote ON/OFF and Synchronization .. 9 Soft-Start ... 9 Shutdown/Auto-Restart ... 9 Hysteretic Over-Temperature Protection ... 9 Bandgap Reference ... 10 High-Voltage Bias Current Source .. 10
Using Feature Pins
... 10 FREQUENCY (F) Pin Operation .. 10 LINE-SENSE (L) Pin Operation ... 10 EXTERNAL CURRENT LIMIT (X) Pin Operation ... 11 MULTI-FUNCTION (M) Pin Operation .. 11
Typical Uses of FREQUENCY (F) Pin
.. 14
Typical Uses of LINE-SENSE (L) and EXTERNAL CURRENT LIMIT (X) Pins
... 15
Typical Uses of MULTI-FUNCTION (M) Pin
... 17
Application Examples
.. 20 A High Efficiency, 30 W, Universal Input Power Supply ... 20 A High Efficiency, Enclosed, 70 W, Universal Adapter Supply ... 20 A High Efficiency, 250 W, 250-380 VDC Input Power Supply .. 22 Multiple Output, 60 W, 185-265 VAC Input Power Supply .. 23 Processor Controlled Supply Turn On/Off ... 24
Key Application Considerations
.. 26 TOPSwitch-II vs. TOPSwitch-GX .. 26 TOPSwitch-FX vs. TOPSwitch-GX .. 28 TOPSwitch-GXDesign Considerations .. 28 TOPSwitch-GX Layout Considerations ... 30 Quick Design Checklist .. 32 Design Tools ... 32
Product Specifications and Test Conditions
.. 33
Typical Performance Characteristics
.. 40
Part Ordering Information
... 46
Package Outlines
... 47
2
Rev. R 10/20 www.power.com
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 Undervoltage Detection (UV) ... 8 Line Overvoltage Shutdown (OV) .. 8 Line Feed-Forward with DC Reduction .. 8 MAX Remote ON/OFF and Synchronization .. 9 Soft-Start ... 9 Shutdown/Auto-Restart ... 9 Hysteretic Over-Temperature Protection ... 9 Bandgap Reference ... 10 High-Voltage Bias Current Source .. 10
Using Feature Pins
... 10 FREQUENCY (F) Pin Operation .. 10 LINE-SENSE (L) Pin Operation ... 10 EXTERNAL CURRENT LIMIT (X) Pin Operation ... 11 MULTI-FUNCTION (M) Pin Operation .. 11
Typical Uses of FREQUENCY (F) Pin
.. 14
Typical Uses of LINE-SENSE (L) and EXTERNAL CURRENT LIMIT (X) Pins
... 15
Typical Uses of MULTI-FUNCTION (M) Pin
... 17
Application Examples
.. 20 A High Efficiency, 30 W, Universal Input Power Supply ... 20 A High Efficiency, Enclosed, 70 W, Universal Adapter Supply ... 20 A High Efficiency, 250 W, 250-380 VDC Input Power Supply .. 22 Multiple Output, 60 W, 185-265 VAC Input Power Supply .. 23 Processor Controlled Supply Turn On/Off ... 24
Key Application Considerations
.. 26 TOPSwitch-II vs. TOPSwitch-GX .. 26 TOPSwitch-FX vs. TOPSwitch-GX .. 28 TOPSwitch-GXDesign Considerations .. 28 TOPSwitch-GX Layout Considerations ... 30 Quick Design Checklist .. 32 Design Tools ... 32
Product Specifications and Test Conditions
.. 33
Typical Performance Characteristics
.. 40
Part Ordering Information
... 46
Package Outlines
... 47
2
Rev. R 10/20 www.power.com
