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ACT2801 Scheda tecnica(PDF) 16 Page - Active-Semi, Inc |
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ACT2801 Scheda tecnica(HTML) 16 Page - Active-Semi, Inc |
16 / 25 page Rev 9, 14-Mar-17 Innovative PowerTM - 16 - www.active-semi.com Copyright © 2015-2017 Active-Semi, Inc. ACT2801/ACT2801B/ACT2801C limits. In a typical application, the TH pin is connected to the battery pack's thermistor input as shown in Figure 20. The ACT2801 injects a 60µA current out of the TH pin into the thermistor, so that the thermistor resistance is monitored by comparing the voltage at TH to the internal VTHL and VTHH thresholds of 0.3V and 1.5V, respectively. When VTH > VTHH or VTH < VTHL charging and the charge timers are suspended. When VTH returns to the normal range, charging and the charge timers resume. The threshold is given by: 60µA×RNOM×kHOT=0.3V→ RNOM×kHOT=5kΩ 60µA×RNOM×kCOLD=1.5V → RNOM×kCOLD= 25kΩ where RNOM is the nominal thermistor resistance at room temperature, and kHOT and kCOLD are the ratios of the thermistor's resistance at the desired hot and cold thresholds, respectively. TH VTHH VTHL 60µA Li+ Battery Pack + – NTC + - + - Figure 20. Battery thermal circuit |
Codice articolo simile - ACT2801_17 |
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Descrizione simile - ACT2801_17 |
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