VMIVME-7696-650工控機器人備件
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提交文檔反饋版權所有?–德克薩斯儀器公司功能框圖（續）圖功能圖圖功能圖文件夾鏈接： 版權所有?–德州儀器公司提交文檔反饋功能描述啟用具有啟用引腳允許外部控制信號打開和關閉調節器輸出啟用開/關閾值沒有滯后電壓信號必須在接通和斷開電壓閾值范圍內快速干凈地上升和下降引腳電壓必須高于閾值以確保設備在所有操作條件下都能完全啟用引腳電壓必須低于閾值以確保設備完全禁用啟用引腳沒有內部上拉或下拉來建立默認條件因此該引腳必須主動或被動終止如果啟用引腳由主動拉高和拉低
電源驅動
則不應允許驅動電壓低于接地電位或高于如果應用程序不需要啟用功能則引腳應直接連接到引腳熱關機保護當結溫升至約°時熱關機將禁用輸出從而使設備冷卻當結溫度冷卻至約°時輸出電路啟用根據功率分布熱阻和環境溫度熱保護電路可能會循環打開和關閉這種熱循環限制了調節器的分布并防止其因過熱而損壞的電路設計用于防止臨時熱過載情況電路不打算取代適當的散熱將設備連續運行至熱關機會降低設備可靠性折疊電流限制折疊電流限制內置于和中可在輸出電壓降低時減少可提供的輸出電流量負載電流的量取決于和之間的差分電壓通常當該差分電壓超過
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Submit document feedback Copyright ?– Texas Instruments Functional Block Diagram (continued) Functional Diagram Functional Diagram Folder Link: Copyright ?– Texas Instruments submitted documents Feedback function description Enable with enable pin allows external control signal to open and close regulator output Enable on/off threshold No hysteresis Voltage signal must be within the threshold range of on and off voltage Fast and clean rise and fall pin voltage must be higher than the threshold to ensure that the device can be fully enabled under all operating conditions Pin voltage must be lower than the threshold to ensure that the device can be completely disabled Enable The pin has no internal pull-up or pull-down to establish the default condition, so the pin must be actively or passively terminated if the enabled pin is actively pulled up and pulled down
Power drive
The drive voltage should not be allowed to be lower than the ground potential or higher than the ground potential. If the application does not need to enable the function, the pin should be directly connected to the pin. The thermal shutdown protection will disable the output when the junction temperature rises to about °, so that the equipment can be cooled. When the junction temperature cools to about °, the output circuit is enabled. According to the power distribution, the thermal resistance and the ambient temperature, the thermal protection circuit may cycle to open and close. This thermal cycle limits the distribution of the regulator and prevents its failure The circuit damaged by overheating is designed to prevent temporary thermal overload. The circuit is not intended to replace proper heat dissipation. It can continuously operate the equipment to the thermal shutdown. The reliability of the equipment is reduced. The folding current limit is built into and. It can reduce the available output current when the output voltage is reduced. The amount of load current depends on the differential voltage between and usually when the differential voltage exceeds
