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參數(shù)資料
型號(hào)： TOP234G
英文描述： Analog IC
中文描述： 模擬IC
文件頁(yè)數(shù)： 2/36頁(yè)
文件大小： 650K
代理商： TOP234G
TOP232-234
2
B
7/01
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 DC
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 V
.........................................................................................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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參數(shù)描述
TOP234GN 功能描述:交流/直流開(kāi)關(guān)轉(zhuǎn)換器 20W 85-265 VAC 30W 230 VAC RoHS:否 制造商:STMicroelectronics 輸出電壓:800 V 輸入/電源電壓（最大值）:23.5 V 輸入/電源電壓（最小值）:11.5 V 開(kāi)關(guān)頻率:115 kHz 電源電流:1.6 mA 工作溫度范圍:- 40 C to + 150 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SSO-10 封裝:Reel
TOP234GN-TL 功能描述:交流/直流開(kāi)關(guān)轉(zhuǎn)換器 20W 85-265 VAC 30W 230 VAC RoHS:否 制造商:STMicroelectronics 輸出電壓:800 V 輸入/電源電壓（最大值）:23.5 V 輸入/電源電壓（最小值）:11.5 V 開(kāi)關(guān)頻率:115 kHz 電源電流:1.6 mA 工作溫度范圍:- 40 C to + 150 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SSO-10 封裝:Reel
TOP234G-TL 功能描述:交流/直流開(kāi)關(guān)轉(zhuǎn)換器 20W 85-265 VAC 30W 230 VAC RoHS:否 制造商:STMicroelectronics 輸出電壓:800 V 輸入/電源電壓（最大值）:23.5 V 輸入/電源電壓（最小值）:11.5 V 開(kāi)關(guān)頻率:115 kHz 電源電流:1.6 mA 工作溫度范圍:- 40 C to + 150 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SSO-10 封裝:Reel
TOP234P 功能描述:交流/直流開(kāi)關(guān)轉(zhuǎn)換器 20W 85-265 VAC 30W 230 VAC RoHS:否 制造商:STMicroelectronics 輸出電壓:800 V 輸入/電源電壓（最大值）:23.5 V 輸入/電源電壓（最小值）:11.5 V 開(kāi)關(guān)頻率:115 kHz 電源電流:1.6 mA 工作溫度范圍:- 40 C to + 150 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SSO-10 封裝:Reel
TOP234PN 功能描述:交流/直流開(kāi)關(guān)轉(zhuǎn)換器 20W 85-265 VAC 30W 230 VAC RoHS:否 制造商:STMicroelectronics 輸出電壓:800 V 輸入/電源電壓（最大值）:23.5 V 輸入/電源電壓（最小值）:11.5 V 開(kāi)關(guān)頻率:115 kHz 電源電流:1.6 mA 工作溫度范圍:- 40 C to + 150 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SSO-10 封裝:Reel
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