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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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L9924L датащи(PDF) 52 Page - STMicroelectronics |
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L9924L датащи(HTML) 52 Page - STMicroelectronics |
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52 / 84 page  Thermal shutdown L9924L 52/84 DocID028840 Rev 3 7 Thermal shutdown Thermal shutdown is automatically accomplished by the Smart Power logic when the junction temperature reaches 200 degrees. The system is brought in a safe condition and the microcontroller is powered off for a tTSD time interval to allow the system temperature to decrease After the delay the microcontroller is powered again and will find bit 5 of SPI read register 0x12 set. After 6 trials the system is definitively powered off and can be resumed, if possible, only with a Power On Reset; the thermal shutdown reset counter can be read and cleared through the relevant SPI register. A thermal shutdown condition should never occur and the device SW should keep under control the junction temperature and take the appropriate actions. Figure 25. Thermal shutdown diagram Table 33. Thermal shutdown electrical characteristics # Symbol Parameter Test condition Min. Typ. Max. Unit 1 Tsd Thermal shutdown Guaranteed by design 185 200 215 °C 2 Thyst Hysteresis - 3 6 9 |
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