[FAQ] BQ2589x FAQs

BQ2589x FAQ Home Page

This home page is for common questions in relation to the BQ25890, BQ25890H, BQ25892, BQ25895, BQ25895M, BQ25896, BQ25898, BQ25898D, and BQ25898C.

FAQs

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Charging regulation:

• Why does ICHG reduce when reaching the maximum duty cycle?
• Why does ICHG reduce during input voltage DPM (Dynamic Power Management) or the input current DPM?

System regulation:

• Why does the LED connected to STAT pin flashes and the SYS voltage unstable when battery is not connected?
• Why VSYS does not start up normally when there is a loading on the SYS and the battery is not present?

OTG function:

• Why does the PMID pin voltage dip during VBUS removal, transient to the OTG (on-the go-boost) mode?

Miscellaneous:

• Why ADC monitoring sometimes does not work when battery only mode?
• BQ2589X: Schematic Review and PCB Layout Design Tips
• Difference between BQ25890 and BQ25890H

Software:

• Could TI provide the sample Linux driver?

Application Notes

• Selection of Single-Cell Buck Narrow VDC Switching Battery Chargers
• Battery Charger Overload Protection in Boost Mode Operation
• USB D+/D- Input Current Limit Detection
• Optimize your application with a power path battery charger
• Extracting Maximum Power from an Adapter with Input Current Optimization Feature
• DPDM Control Process Evaluation in BQ2589x Family Supporting HVDCP MaxCharge

Datasheets

• BQ25895 I2C Controlled Single Cell 5-A Fast Charger with MaxChargeTM for High Input Voltage and Adjustable Voltage 3.1-A Boost Operation datasheet (Rev. C)
• BQ25890/2 I2C Controlled Single Cell 5-A Fast Charger with MaxChargeTM Technology for High Input Voltage and Adjustable Voltage USB On-the-Go Boost Mode datasheet (Rev. D)
• bq25898, bq25898D I2C Controlled Single Cell 4-A Fast Charger with MaxCharge Technology for High Input Voltage and Adjustable Voltage USB On-the-Go Boost Mode datasheet (Rev. B)
• bq25896 I2C Controlled Single Cell 3-A Fast Charger with MaxChargeTM Technology for High Input Voltage and Adjustable Voltage USB On-the-Go Boost Mode datasheet (Rev. C)
• BQ25895M I2C Controlled Single Cell Fast Charger with MaxChargeTM Technology for High Input Voltage and Adjustable Voltage 3.1 A Boost Operation datasheet (Rev. C)
• bq25898C I2C Controlled Single Cell 3-A Charger for High Input Voltage in Compact DSBGA Package datasheet (Rev. B)
• BQ25890H I2C Controlled Single Cell 5-A Fast Charger with MaxChargeTM Technology for High Input Voltage and Adjustable Voltage USB On-the-Go Boost Mode datasheet (Rev. A) (ti.com)

EVM User Guides

• bq25898, bq25898D, and bq25898C PWR730 Evaluation Modules
• bq25890/892/895/895M EVM (PWR664) User's Guide (Rev. B) - and BQ25896