BQ25173-Q1 Series
Automotive 800-mA programmable linear charger for one- to four-cell supercapacitor with status pins
Manufacturer: Texas Instruments
Catalog
Automotive 800-mA programmable linear charger for one- to four-cell supercapacitor with status pins
Key Features
• AEC-Q100 qualified for automotive applicationsTemperature grade 1: –40°C ≤ T A ≤ 125°CHBM ESD classification level 2CDM ESD classification level C4B40-V load-dump tolerant to support charging back-up supercapacitor, 3-V to 18-V operatingAutomatic Sleep mode for low power consumption350-nA output leakage current2-µA input leakage current when charge disabledSupport 1- to 4-cell supercapacitor charging from 0 VExternal resistor programmable operationFB pin to adjust supercapacitor regulation voltageISET to set charge current from 10 mA to 800 mAHigh accuracy±1% charge voltage accuracy±10% charge current accuracyCharging featuresCE pin for charging function controlOpen-drain output for status and fault indicationOpen-drain output for power-good indicationIntegrated fault protection18-V IN overvoltage protection1000-mA overcurrent protection125°C thermal regulation; 150°C thermal shutdown protectionISET pin short protectionAEC-Q100 qualified for automotive applicationsTemperature grade 1: –40°C ≤ T A ≤ 125°CHBM ESD classification level 2CDM ESD classification level C4B40-V load-dump tolerant to support charging back-up supercapacitor, 3-V to 18-V operatingAutomatic Sleep mode for low power consumption350-nA output leakage current2-µA input leakage current when charge disabledSupport 1- to 4-cell supercapacitor charging from 0 VExternal resistor programmable operationFB pin to adjust supercapacitor regulation voltageISET to set charge current from 10 mA to 800 mAHigh accuracy±1% charge voltage accuracy±10% charge current accuracyCharging featuresCE pin for charging function controlOpen-drain output for status and fault indicationOpen-drain output for power-good indicationIntegrated fault protection18-V IN overvoltage protection1000-mA overcurrent protection125°C thermal regulation; 150°C thermal shutdown protectionISET pin short protection
Description
AI
The BQ25173-Q1 is an automotive rated, 800-mA linear charger for 1- to 4-cell supercapacitors targeted at space-limited applications. The device has a single power output that charges the supercapacitor. The system load can be placed in parallel with the supercapacitor and the charge current is shared between the system and supercapacitor.
During charging, an internal control loop monitors the IC junction temperature and reduces the charge current if the internal temperature threshold, T REG, is exceeded. This feature allows for fast charging of a fully discharged supercapacitor.
The charger power stage and charge current sense functions are fully integrated. The charger function has high accuracy current and voltage regulation loops, charge status display, and charge function control. The charge voltage and fast-charge current are programmable through external resistors.
The BQ25173-Q1 is an automotive rated, 800-mA linear charger for 1- to 4-cell supercapacitors targeted at space-limited applications. The device has a single power output that charges the supercapacitor. The system load can be placed in parallel with the supercapacitor and the charge current is shared between the system and supercapacitor.
During charging, an internal control loop monitors the IC junction temperature and reduces the charge current if the internal temperature threshold, T REG, is exceeded. This feature allows for fast charging of a fully discharged supercapacitor.
The charger power stage and charge current sense functions are fully integrated. The charger function has high accuracy current and voltage regulation loops, charge status display, and charge function control. The charge voltage and fast-charge current are programmable through external resistors.