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BQ2057TSTR Datasheet(PDF) 13 Page - Texas Instruments |
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BQ2057TSTR Datasheet(HTML) 13 Page - Texas Instruments |
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13 / 24 page  bq2057, bq2057C bq2057T, bq2057W SLUS025F − MAY 2001 − REVISED JULY 2002 13 www.ti.com APPLICATION INFORMATION battery temperature monitoring (continued) For PTC Thermistors R T1 + 5 R TH R TC 3 R TH * R TC R T2 + 5 R TH R TC 2 R TH – 7 R TC Where R(TC) is the cold temperature resistance and R(TH) is the hot temperature resistance of thermistor, as specified by the thermistor manufacturer. RT1 or RT2 can be omitted If only one temperature (hot or cold) setting is required. Applying a voltage between the V(TS1) and V(TS2) thresholds to pin TS disables the temperature-sensing feature. SNS BAT VCC TS COMP CC VSS STAT bq2057 DC+ DC− BAT+ BAT− SNS BAT VCC TS COMP CC VSS STAT bq2057 DC+ DC− BAT+ BAT− RT1 Thermistor High-Side Current Sensing Thermistor RT2 RT1 RT2 RSNS Low-Side Current Sensing RSNS Figure 9. Temperature Sensing Circuits Temperature Fault Normal Temperature Range Temperature Fault VCC V(TS2) V(TS1) VSS Figure 10. bq2057 TS Input Thresholds (5) (6) |
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