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BQ20Z80ADBT-V110 Datasheet(PDF) 8 Page - Texas Instruments |
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BQ20Z80ADBT-V110 Datasheet(HTML) 8 Page - Texas Instruments |
8 / 25 page www.ti.com FEATURE SET Primary (1st Level) Safety Features Secondary (2nd Level) Safety Features Charge Control Features bq20z80 bq20z80A SLUS782 – JULY 2007 NOTE The bq20z80-V102 is designed to work with the bq29312A AFE. The bq20z80 features are only available with the bq29312A. . The bq20z80 supports a wide range of battery and system protection features that care easily configured. The primary safety features includes: • Battery cell over/undervoltage protection • Battery pack over/undervoltage protection • 2 independent charge overcurrent protection • 3 independent discharge overcurrent protection • Short circuit protection • Overtemperature protection • Host watchdog The secondary safety features of the bq20z80 can be used to indicate more serious faults via the SAFE (pin 7) and SAFE (pin 12) pins. These pins can be used to blow a in-line fuse to permanently disable the battery pack from charging or discharging. The secondary safety features includes: • Safety over voltage • Battery cell imbalance • 2nd level protection IC input • Safety overcurrent • Safety overtemperature • Open thermistor • Charge FET and 0 Volt Charge FET fault • Discharge FET fault • Fuse blow failure detection • AFE communication error • Internal flash data error The bq20z80 charge control features includes: • Report the appropriate charging current needed for constant current charging and the appropriate charging voltage needed for constant voltage charging to a smart charger using SMBus broadcasts. • Determines the chemical state of charge of each battery cell using Impedance Track™ and can reduce the charge difference of the battery cells in fully charged state of the battery pack gradually using cell balancing algorithm during charging. This prevents fully charged cells from overcharging causing excessive degradation and also increases the usable pack energy by preventing to early charge termination • supports pre-charging/zero-volt charging • support fast charging • supports pulse charging • detects charge termination • report charging faults and also indicate charge status via charge and discharge alarms. 8 Submit Documentation Feedback |
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