[FAQ] BQ2562x FAQs

BQ2562x FAQ Home Page

This home page is for common questions in relation to the BQ25620, BQ25622, BQ25628, BQ25629, BQ25628E, and BQ25622E.

FAQs

------------------------------------------------------------------------------------------------------------------------------

Charging regulation:

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

System regulation:

• Why does the LED connected to STAT pin flashes and the SYS voltage unstable when battery is not connected?
• How is VSYS regulated for BQ25620/22 and BQ25628/29? What conditions determine how it’s regulated? When is SYSMIN threshold valid?

Safety features:

• How does the charge safety timer work?

OTG function:

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

Miscellaneous:

• .bqz file for BQ25628 EVM and BQ25620 EVM
• BQ2562x Calculator Tool
• Online GUI Thermistor Calculator
• How does QON pin function work and what is required hold low timing?
• Does the BQ2562x device store my register configuration?

Software:

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
• High-Efficiency Charging for TWS Using a 2-Pin Interface Application Report (Rev. A)
• LiFePO4 Design Considerations
• Optimize your application with a power path battery charger

Other Documentation

• How to choose the right charger for industrial batteries
• Powering the smart home with a simple charger
• Benefits of rechargeable batteries in real-time location system trackers
• Addressing Performance Challenges in Nano-IQ Systems (Rev. A)

Datasheets

• BQ25628E I2 C Controlled 1-Cell, 2A, Maximum 18V Input, Buck Battery Charger with NVDC Power Path Management datasheet (Rev. B)
• BQ25628 / BQ25629 I2 C Controlled 1-Cell, 2A, Maximum 18V Input, Buck Battery Charger with NVDC Power Path Management and OTG Output datasheet (Rev. B)
• BQ25622E I2 C Controlled 1-Cell, 3A, Maximum 18V Input, Buck Battery Charger with NVDC Power Path Management datasheet (Rev. B)
• BQ25620 /BQ25622 I2 C Controlled 1-Cell, 3.5A, Maximum 18V Input, Buck Battery Charger with NVDC Power Path Management and OTG Output datasheet (Rev. C)

EVM User Guides

• BQ25620EVM User's Guide (Rev. A) - and BQ25622, BQ25622E
• BQ25628 BQ25629 Evaluation Module User's Guide - and BQ25628E