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L6985F 数据表(PDF) 35 Page - STMicroelectronics |
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L6985F 数据表(HTML) 35 Page - STMicroelectronics |
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35 / 65 page  DocID027836 Rev 2 35/65 L6985F Functional description 65 Figure 26. Overvoltage operation 4.9 Thermal shutdown The shutdown block disables the switching activity if the junction temperature is higher than a fixed internal threshold (165 °C typical). 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 continuously. When the thermal protection runs away a new soft-start cycle will take place. VBIAS pin voltage regulated output voltage inductor current switching node (purple) (cyan) |
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