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BQ25620 ACTIVE I²C controlled 1-cell 3.5-A buck battery charger with 18-V max input, integrated ADC and OTG output This product is a 3.5-A buck charger with low battery leakage current and D+D- USB detection

Product details

Number of series cells 1 Charge current (max) (A) 3 Vin (max) (V) 13.5 Cell chemistry Li-Ion/Li-Polymer Battery charge voltage (min) (V) 3.85 Battery charge voltage (max) (V) 4.62 Absolute max Vin (max) (V) 20 Control topology Switch-Mode Buck Control interface I2C Features BAT temp thermistor monitoring (JEITA profile), IC thermal regulation, Input OVP, Power Path, USB D+/D-/BC1.2 integrated, USB OTG integrated, VINDPM (Input voltage threshold to maximize adaptor power) Vin (min) (V) 3.9 Rating Catalog Operating temperature range (°C) -40 to 85
Number of series cells 1 Charge current (max) (A) 3 Vin (max) (V) 13.5 Cell chemistry Li-Ion/Li-Polymer Battery charge voltage (min) (V) 3.85 Battery charge voltage (max) (V) 4.62 Absolute max Vin (max) (V) 20 Control topology Switch-Mode Buck Control interface I2C Features BAT temp thermistor monitoring (JEITA profile), IC thermal regulation, Input OVP, Power Path, USB D+/D-/BC1.2 integrated, USB OTG integrated, VINDPM (Input voltage threshold to maximize adaptor power) Vin (min) (V) 3.9 Rating Catalog Operating temperature range (°C) -40 to 85
WQFN (RTW) 24 16 mm² 4 x 4
  • High-efficiency, 1.5-MHz, synchronous switch-mode buck charger
    • 92% Charge efficiency at 2 A from 5-V input
    • Optimized for USB voltage input (5 V)
    • Selectable low power Pulse Frequency Modulation (PFM) Mode for light load operations
  • Supports USB On-The-Go (OTG)
    • Boost converter with up to 1.2-A output
    • 92% Boost efficiency at 1-A output
    • Accurate Constant Current (CC) limit
    • Soft-start up to 500-µF capacitive load
    • Output short circuit protection
    • Selectable low power PFM Mode for light load operations
  • Single input to support USB input and high voltage adapters
    • Support 3.9-V to 13.5-V input voltage range with 22-V absolute maximum input voltage rating
    • Programmable input current limit (100 mA to 3.2 a with 100-mA Resolution) to support USB 2.0, USB 3.0 standards and high voltage adaptors (IINDPM)
    • Maximum power tracking by input voltage limit up to 5.4 V (VINDPM)
    • VINDPM Threshold automatically tracks battery voltage
    • Auto detect USB BC1.2, SDP, CDP, DCP and non-standard adaptors
  • High battery discharge efficiency with 19.5-mΩ battery discharge MOSFET
  • Narrow VDC (NVDC) power path management
    • Instant-on works with no battery or deeply discharged battery
    • Ideal diode operation in Battery Supplement Mode
  • BATFET Control to support ship mode, wake up and full system reset
  • Flexible autonomous and I2C Mode for optimal system performance
  • High integration includes all MOSFETs, current sensing and loop compensation
  • 17-µA Low battery leakage current
  • High accuracy
    • ±0.5% Charge voltage regulation
    • ±5% at 1.5-A Charge current regulation
    • ±10% at 0.9-A Input current regulation
  • Safety-Related Certifications:
    • TUV IEC 62368 Certification
  • High-efficiency, 1.5-MHz, synchronous switch-mode buck charger
    • 92% Charge efficiency at 2 A from 5-V input
    • Optimized for USB voltage input (5 V)
    • Selectable low power Pulse Frequency Modulation (PFM) Mode for light load operations
  • Supports USB On-The-Go (OTG)
    • Boost converter with up to 1.2-A output
    • 92% Boost efficiency at 1-A output
    • Accurate Constant Current (CC) limit
    • Soft-start up to 500-µF capacitive load
    • Output short circuit protection
    • Selectable low power PFM Mode for light load operations
  • Single input to support USB input and high voltage adapters
    • Support 3.9-V to 13.5-V input voltage range with 22-V absolute maximum input voltage rating
    • Programmable input current limit (100 mA to 3.2 a with 100-mA Resolution) to support USB 2.0, USB 3.0 standards and high voltage adaptors (IINDPM)
    • Maximum power tracking by input voltage limit up to 5.4 V (VINDPM)
    • VINDPM Threshold automatically tracks battery voltage
    • Auto detect USB BC1.2, SDP, CDP, DCP and non-standard adaptors
  • High battery discharge efficiency with 19.5-mΩ battery discharge MOSFET
  • Narrow VDC (NVDC) power path management
    • Instant-on works with no battery or deeply discharged battery
    • Ideal diode operation in Battery Supplement Mode
  • BATFET Control to support ship mode, wake up and full system reset
  • Flexible autonomous and I2C Mode for optimal system performance
  • High integration includes all MOSFETs, current sensing and loop compensation
  • 17-µA Low battery leakage current
  • High accuracy
    • ±0.5% Charge voltage regulation
    • ±5% at 1.5-A Charge current regulation
    • ±10% at 0.9-A Input current regulation
  • Safety-Related Certifications:
    • TUV IEC 62368 Certification

The BQ25601D device is a highly-integrated 3-A switch-mode battery charge management and system power path management device for single cell Li-Ion and Li-polymer battery. The low impedance power path optimizes switch-mode operation efficiency, reduces battery charging time and extends battery life during discharging phase. The I2C serial interface with charging and system settings makes the device a truly flexible solution.

The BQ25601D is a highly-integrated 3.0-A switch-mode battery charge management and system power path management device for single cell Li-Ion and Li-polymer battery. It features fast charging with high input voltage support for a wide range of smart phones, tablets and portable devices. Its low impedance power path optimizes switch-mode operation efficiency, reduces battery charging time and extends battery life during discharging phase. Its input voltage and current regulation deliver maximum charging power to battery. The solution is highly integrated with input reverse-blocking FET (RBFET, Q1), high-side switching FET (HSFET, Q2), low-side switching FET (LSFET, Q3), and battery FET (BATFET, Q4) between system and battery. It also integrates the bootstrap diode for the high-side gate drive for simplified system design. The I2C serial interface with charging and system settings makes the device a truly flexible solution.

The device supports a wide range of input sources, including standard USB host port, USB charging port, and USB compliant high voltage adapter. The device sets default input current limit based on the built-in USB interface. To set the default input current limit, the device uses the built-in USB interface, or takes the result from detection circuit in the system, such as USB PHY device. The device is compliant with USB 2.0 and USB 3.0 power spec with input current and voltage regulation. The device also meets USB On-the-Go (OTG) operation power rating specification by supplying 5.15 V on VBUS with constant current limit up to 1.2A.

The power path management regulates the system slightly above battery voltage but does not drop below 3.5 V minimum system voltage (programmable). With this feature, the system maintains operation even when the battery is completely depleted or removed. When the input current limit or voltage limit is reached, the power path management automatically reduces the charge current to zero. As the system load continues to increase, the power path discharges the battery until the system power requirement is met. This Supplement Mode prevents overloading the input source.

The device initiates and completes a charging cycle without software control. It senses the battery voltage and charges the battery in three phases: pre-conditioning, constant current and constant voltage. At the end of the charging cycle, the charger automatically terminates when the charge current is below a preset limit and the battery voltage is higher than recharge threshold. If the fully charged battery falls below the recharge threshold, the charger automatically starts another charging cycle.

The charger provides various safety features for battery charging and system operations, including battery negative temperature coefficient thermistor monitoring, charging safety timer and overvoltage and overcurrent protections. The thermal regulation reduces charge current when the junction temperature exceeds 110°C (programmable). The STAT output reports the charging status and any fault conditions. Other safety features include battery temperature sensing for charge and boost mode, thermal regulation and thermal shutdown and input UVLO and overvoltage protection. The VBUS_GD bit indicates if a good power source is present. The INT output Immediately notifies host when fault occurs.

The device also provides QON pin for BATFET enable and reset control to exit low power ship mode or full system reset function.

The device is available in 24-pin, 4 mm × 4 mm x 0.75 mm thin WQFN package.

The BQ25601D device is a highly-integrated 3-A switch-mode battery charge management and system power path management device for single cell Li-Ion and Li-polymer battery. The low impedance power path optimizes switch-mode operation efficiency, reduces battery charging time and extends battery life during discharging phase. The I2C serial interface with charging and system settings makes the device a truly flexible solution.

The BQ25601D is a highly-integrated 3.0-A switch-mode battery charge management and system power path management device for single cell Li-Ion and Li-polymer battery. It features fast charging with high input voltage support for a wide range of smart phones, tablets and portable devices. Its low impedance power path optimizes switch-mode operation efficiency, reduces battery charging time and extends battery life during discharging phase. Its input voltage and current regulation deliver maximum charging power to battery. The solution is highly integrated with input reverse-blocking FET (RBFET, Q1), high-side switching FET (HSFET, Q2), low-side switching FET (LSFET, Q3), and battery FET (BATFET, Q4) between system and battery. It also integrates the bootstrap diode for the high-side gate drive for simplified system design. The I2C serial interface with charging and system settings makes the device a truly flexible solution.

The device supports a wide range of input sources, including standard USB host port, USB charging port, and USB compliant high voltage adapter. The device sets default input current limit based on the built-in USB interface. To set the default input current limit, the device uses the built-in USB interface, or takes the result from detection circuit in the system, such as USB PHY device. The device is compliant with USB 2.0 and USB 3.0 power spec with input current and voltage regulation. The device also meets USB On-the-Go (OTG) operation power rating specification by supplying 5.15 V on VBUS with constant current limit up to 1.2A.

The power path management regulates the system slightly above battery voltage but does not drop below 3.5 V minimum system voltage (programmable). With this feature, the system maintains operation even when the battery is completely depleted or removed. When the input current limit or voltage limit is reached, the power path management automatically reduces the charge current to zero. As the system load continues to increase, the power path discharges the battery until the system power requirement is met. This Supplement Mode prevents overloading the input source.

The device initiates and completes a charging cycle without software control. It senses the battery voltage and charges the battery in three phases: pre-conditioning, constant current and constant voltage. At the end of the charging cycle, the charger automatically terminates when the charge current is below a preset limit and the battery voltage is higher than recharge threshold. If the fully charged battery falls below the recharge threshold, the charger automatically starts another charging cycle.

The charger provides various safety features for battery charging and system operations, including battery negative temperature coefficient thermistor monitoring, charging safety timer and overvoltage and overcurrent protections. The thermal regulation reduces charge current when the junction temperature exceeds 110°C (programmable). The STAT output reports the charging status and any fault conditions. Other safety features include battery temperature sensing for charge and boost mode, thermal regulation and thermal shutdown and input UVLO and overvoltage protection. The VBUS_GD bit indicates if a good power source is present. The INT output Immediately notifies host when fault occurs.

The device also provides QON pin for BATFET enable and reset control to exit low power ship mode or full system reset function.

The device is available in 24-pin, 4 mm × 4 mm x 0.75 mm thin WQFN package.

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BQ25890 ACTIVE I2C 1cell 5A buck battery charger Maxcharge™ tech for high input with D+/D- This product is 5A charging current

Technical documentation

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Type Title Date
* Data sheet BQ25601DI2C Controlled 3-A Single-Cell Battery Charger With USB Charger Detection for High Input Voltage and Narrow Voltage DC (NVDC) Power Path Management datasheet (Rev. B) PDF | HTML 11 Jan 2022
Application note Selection of Single-Cell Buck Narrow VDC Switching Battery Chargers PDF | HTML 10 Nov 2022
Application note USB D+/D- Input Current Limit Detection PDF | HTML 30 Dec 2020
Technical article Battery-charging tips for video doorbell applications PDF | HTML 15 Apr 2019
EVM User's guide BQ25601 and BQ25601D (PWR877) Evaluation Module User’s Guide (Rev. A) 02 Aug 2018

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Evaluation board

BQ25601DEVM-877 — BQ25601D Single Cell 3-A Battery Charger Evaluation Module with NVDC Power Path Management

The BQ25601D evaluation module (EVM) is a complete charger module for evaluating an I2C-controlled single cell battery charger using the BQ25601D device. The user's guide provides detailed testing instructions for the BQ25601D evaluation modules. Also included are descriptions of the necessary (...)
User guide: PDF
Not available on TI.com
Application software & framework

BQSTUDIO — Battery Management Studio (bqStudio) Software

Battery Management Studio (bqStudio) offers a full suite of robust tools to assist with the process of evaluating, designing with, configuring, testing, or otherwise utilizing TI Battery management products. This includes features that provide full access to registers and data memory including (...)
Driver or library

BQ256XXSW-LINUX — Linux driver for BQ256XX

The Linux driver supports the BQ256XX family of I2C Controlled, 1-cell, switch-mode battery charge management and system power path management ICs. The Linux driver supports communication through the I2C bus and interfaces with the power supply sub-system.

Linux mainline status

Available in Linux (...)

Package Pins CAD symbols, footprints & 3D models
WQFN (RTW) 24 Ultra Librarian

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