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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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ACT8600 датащи(PDF) 49 Page - Active-Semi, Inc |
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ACT8600 датащи(HTML) 49 Page - Active-Semi, Inc |
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49 / 50 page  ACT8600 Rev 3, 15-Nov-12 Copyright © 2012 Active-Semi, Inc. Innovative Power TM ActivePMU TM and ActivePathTM are trademarks of Active-Semi. I 2CTM is a trademark of NXP. - 49 - www.active-semi.com temperature of the battery pack by injecting a 100μA (typ) current into the thermistor (via the TH pin) and sensing the voltage at TH. The voltage at TH is continuously monitored, and charging is suspended if the voltage at TH exceeds either of the internal VTHH and VTHL thresholds of 0.5V and 2.5V, respectively. The net resistance (from TH to GA) required to cross the thresholds are given by: 100μA × RNOM × kHOT = 0.5V → RNOM × kHOT ≈ 5kΩ 100μA × RNOM × kCOLD = 2.5V → RNOM × kCOLD ≈ 25kΩ where RNOM is the nominal thermistor resistance at room temperature, and kHOT and kCOLD represent the ratios of the thermistor's resistance at the desired hot and cold thresholds, respectively, to the resistance at 25°C. The status of the battery temperature pin may be read at any time by reading the TEMPDAT[-] bit, where a value of 1 indicates that battery temperature is within the valid range, and a value of 0 indicates that battery temperature has exceeded either of the thresholds. Figure 7: Simple Configuration |
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