BQ40Z50 Datasheet, PDF (19/30 Pages) Texas Instruments – 1-Series, 2-Series, 3-Series, and 4-Series Li-Ion Battery Pack Manager

bq40z50
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FEATURE SET
SLUSBS8 – DECEMBER 2013
Primary (1st Level) Safety Features
The bq40z50 supports a wide range of battery and system protection features that can easily be configured. The
primary safety features include:
• Cell Overvoltage Protection
• Cell Undervoltage Protection
• Cell Undervoltage Protection Compensated
• Overcurrent in Charge Protection
• Overcurrent in Discharge Protection
• Overload in Discharge Protection
• Short Circuit in Charge Protection
• Short Circuit in Discharge Protection
• Overtemperature in Charge Protection
• Overtemperature in Discharge Protection
• Undertemperature in Charge Protection
• Undertemperature in Discharge Protection
• Overtemperature FET protection
• Precharge Timeout Protection
• Host Watchdog Timeout Protection
• Fast Charge Timeout Protection
• Overcharge Protection
• Overcharging Voltage Protection
• Overcharging Current Protection
• Over Precharge Current Protection
Secondary (2nd Level) Safety Features
The secondary safety features of the bq40z50 can be used to indicate more serious faults via the FUSE pin. This
pin can be used to blow an in-line fuse to permanently disable the battery pack from charging or discharging. The
secondary safety features provide protection against:
• Safety Overvoltage Permanent Failure
• Safety Undervoltage Permanent Failure
• Safety Overtemperature Permanent Failure
• Safety FET Overtemperature Permanent Failure
• Qmax Imbalance Permanent Failure
• Impedance Imbalance Permanent Failure
• Capacity Degradation Permanent Failure
• Cell Balancing Permanent Failure
• Fuse Failure Permanent Failure
• PTC Permanent Failure
• Voltage Imbalance at Rest Permanent Failure
• Voltage Imbalance Active Permanent Failure
• Charge FET Permanent Failure
• Discharge FET Permanent Failure
• AFE Register Permanent Failure
• AFE Communication Permanent Failure
• Second Level Protector Permanent Failure
• Instruction Flash Checksum Permanent Failure
• Open Cell Connection Permanent Failure
Copyright © 2013, Texas Instruments Incorporated
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