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L6981 bảng dữ liệu(PDF) 20 Page - STMicroelectronics

tên linh kiện L6981
Giải thích chi tiết về linh kiện  38 V, 1.5 A synchronous step-down converter with low quiescent current
PDF  49 Pages
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nhà sản xuất  STMICROELECTRONICS [STMicroelectronics]
Trang chủ  http://www.st.com
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L6981 bảng dữ liệu(HTML) 20 Page - STMicroelectronics

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Figure 21 shows the L6981 soft-start procedure with VOUT shorted to GND.
Figure 21. Soft-start procedure with VOUT shorted to GND
Figure 22 shows the L6981 over current protection with a persistent short-circuit between VOUT and GND.
Figure 22. Over current procedure with persistent short circuit between VOUT and GND
6.7
Thermal shutdown
The shutdown block disables the switching activity if the junction temperature is higher than a fixed internal
threshold (TSHDWN refer to Table 6). The thermal sensing element is close to the power elements, ensuring fast
and accurate temperature detection. A hysteresis of approximately 30 °C prevents the device from turning ON
and OFF too fast. After a thermal protection event has expired, the L6981 restarts with a new soft-start.
L6981
Thermal shutdown
DS13554 - Rev 1
page 20/49



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