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TOP232Y 参数 Datasheet PDF下载

TOP232Y图片预览
型号: TOP232Y
PDF下载: 下载PDF文件 查看货源
内容描述: 的TOPSwitch - FX系列设计灵活, EcoSmart® ,集成离线式开关 [TOPSwitch-FX Family Design Flexible, EcoSmart®, Integrated Off-line Switcher]
分类和应用: 开关
文件页数/大小: 36 页 / 644 K
品牌: PAM [ POWER ANALOG MICOELECTRONICS ]
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TOP232-234  
Section List  
Pin Functional Description......................................................................................................................................... 3  
TOPSwitch-FX Family Functional Description ......................................................................................................... 4  
CONTROL (C) Pin Operation ................................................................................................................................. 4  
Oscillator and Switching Frequency ....................................................................................................................... 5  
Pulse Width Modulator and Maximum Duty Cycle ................................................................................................. 5  
Minimum Duty Cycle and Cycle Skipping ............................................................................................................... 6  
Error Amplifier ......................................................................................................................................................... 6  
On-chip Current Limit with External Programability ................................................................................................ 6  
Line Under-Voltage Detection (UV) ........................................................................................................................ 6  
Line Overvoltage Shutdown (OV) ........................................................................................................................... 7  
Line Feed Forward with DCMAX Reduction .............................................................................................................. 7  
Remote ON/OFF and Synchronization ................................................................................................................... 7  
Soft-Start ................................................................................................................................................................ 8  
Shutdown/Auto-Restart .......................................................................................................................................... 8  
Hysteretic Over-Temperature Protection ................................................................................................................ 8  
Bandgap Reference................................................................................................................................................ 8  
High-Voltage Bias Current Source.......................................................................................................................... 8  
Using FREQUENCY and MULTI-FUNCTION Pins ..................................................................................................... 9  
FREQUENCY (F) Pin Operation............................................................................................................................. 9  
MULTI-FUNCTION (M) Pin Operation .................................................................................................................... 9  
Typical Uses of FREQUENCY (F) Pin ...................................................................................................................... 11  
Typical Uses of MULTI-FUNCTION (M) Pin ............................................................................................................. 12  
Application Examples ............................................................................................................................................... 14  
A High Efficiency, 30 W, Universal Input Power Supply........................................................................................ 14  
35 W Multiple Output Power Supply ..................................................................................................................... 15  
17 W PC Standby Power Supply .......................................................................................................................... 16  
Processor Controlled Supply Turn On/Off ............................................................................................................ 17  
Key Application Considerations .............................................................................................................................. 19  
TOPSwitch-FX vs. TOPSwitch-ll........................................................................................................................... 19  
TOPSwitch-FX Design Considerations................................................................................................................. 20  
TOPSwitch-FX Selection................................................................................................................................ 20  
Input Capacitor ............................................................................................................................................... 20  
Primary Clamp and Output Reflected Voltage VOR ......................................................................................... 20  
Output Diode .................................................................................................................................................. 21  
Soft-Start ........................................................................................................................................................ 21  
EMI ................................................................................................................................................................. 21  
Transformer Design........................................................................................................................................ 21  
Standby Consumption .................................................................................................................................... 23  
TOPSwitch-FX Layout Considerations ................................................................................................................. 23  
Primary Side Connections.............................................................................................................................. 23  
Y-Capacitor..................................................................................................................................................... 23  
Heat Sinking ................................................................................................................................................... 23  
Quick Design Checklist......................................................................................................................................... 23  
Design Tools ......................................................................................................................................................... 23  
Product Specifications and Test Conditions .......................................................................................................... 24  
Typical Performance Characteristics ...................................................................................................................... 30  
Package Outlines ...................................................................................................................................................... 34  
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