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PIFE32251B-R68MS 数据表(PDF) 60 Page - Texas Instruments |
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PIFE32251B-R68MS 数据表(HTML) 60 Page - Texas Instruments |
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60 / 157 page  VCOMP VCOMP TRIPZ TRIPZ N PTC1 PTC2 PTCn R LDO3V 10uA LDO3 + - + - 1.25V VCOMP VCOMP TRIPZ TRIPZ N LDO3V R1 LDO3V OFF LDO3 + - + - 1.25V R2 PTC1 PTC2 PTCn VCOMP VCOMP TRIPZ TRIPZ N LDO3V R1 LDO3V OFF LDO3 + - + - 1.25V R2 NTC Copyright © 2016, Texas Instruments Incorporated 60 TPS650830 SLVSCF4A – DECEMBER 2014 – REVISED JULY 2016 www.ti.com Submit Documentation Feedback Product Folder Links: TPS650830 Detailed Description Copyright © 2014–2016, Texas Instruments Incorporated 6.3.9 Temperature Comparator The temperature comparator is used to detect either several PTC thermisters stacked in series string, or a single NTC thermister. The PTC thermisters allow an inexpensive overtemperature detection of any fault throughout several points on the motherboard with each PTC thermister selected to have its own temperature threshold trigger point. An internal current source can be enabled to drive the PTC thermisters to minimize noise sensitivity. The current source can be disabled to drive with a voltage source such as the LDO3V to allow a tighter accuracy. Only a single NTC thermister can be detected at a time, but the NTC allows tracking several temperature profiles. This comparator can also be used as a general purpose comparator. Figure 6-9. Temperature Comparator |
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