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參數(shù)資料
| 型號： | TPS40200MDREPG4 |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | SWITCHING CONTROLLER, 500 kHz SWITCHING FREQ-MAX, PDSO8 |
| 封裝： | GREEN, PLASTIC, MS-012AA, SOIC-8 |
| 文件頁數(shù)： | 3/43頁 |
| 文件大?。?/td> | 1069K |
| 代理商： | TPS40200MDREPG4 |
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Current-Limit Resistor Selection
SGLS371 – JANUARY 2007
GENERAL INFORMATION (continued)
As shown in Figure 27, a resistor in series with the power MOSFET sets the overcurrent protection level. Use a
low-inductance resistor to avoid problems with ringing signals and nuisance tripping. When the FET is on and
the controller senses 100 mV or more drop from the VDD pin to the ISNS pin, an overcurrent condition is
declared. When this happens, the FET is turned off and, as shown in Figure 28, the soft-start capacitor is
discharged. When the soft-start capacitor reaches a level below 150 mV, the converter clears the overcurrent
condition flag and attempts to restart. If the condition that caused the overcurrent event to occur is still present
on the output of the converter (see Figure 27), another overcurrent condition is declared and the process
repeats indefinitely. Figure 27 shows the soft-start capacitor voltage during an extended output fault condition.
The overall duty cycle of current conduction during a persistent fault is approximately 2%.
Figure 25. Typical Soft-Start Capacitor and VOUT During Overcurrent
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| TPS40200-Q1 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:WIDE-INPUT-RANGE NONSYNCHRONOUS VOLTAGE-MODE CONTROLLER |
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| TPS40200SHKQ | 功能描述:DC/DC 開關(guān)控制器 Hi Temp Non-Sync Buck DC/DC Cntlr RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關(guān)頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風(fēng)格: 封裝 / 箱體:CPAK |
| TPS40200SKGD1 | 功能描述:DC/DC 開關(guān)控制器 Wide Input Non-Synch RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關(guān)頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風(fēng)格: 封裝 / 箱體:CPAK |
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