參數(shù)資料
型號(hào)： T0P243G
廠商： Power Integrations, Inc.
英文描述： Family Extended Power, Design Flexible,Integrated Off-line Switcher
中文描述： 家庭擴(kuò)展的電源，設(shè)計(jì)靈活，集成的離線切換
文件頁(yè)數(shù)： 2/48頁(yè)
文件大?。?/td> 771K
代理商： T0P243G
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
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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