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BQ25619

ACTIVE

I2C controlled 1.5-A single cell buck battery charger with 20-mA termination and 1-A boost

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Data sheet

BQ25619

ACTIVE
Data sheet Order now

Product details

Number of series cells 1 Charge current (Max) (A) 1.5 Operating Vin (Max) (V) 13.5 Cell chemistry Li-Ion/Li-Polymer, Lithium Phosphate/LiFePO4 Battery charge voltage (Min) (V) 3.5 Battery charge voltage (Max) (V) 4.52 Absolute Vin (safety rating) (Max) ((V)) 22 Control interface I2C Features BAT temp thermistor monitoring (JEITA profile), IC thermal regulation, IINDPM (Input current limit), Input OVP, Power Path, USB OTG integrated, VINDPM (Input voltage threshold to maximize adaptor power) Operating Vin (Min) (V) 3.9 Rating Catalog
Number of series cells 1 Charge current (Max) (A) 1.5 Operating Vin (Max) (V) 13.5 Cell chemistry Li-Ion/Li-Polymer, Lithium Phosphate/LiFePO4 Battery charge voltage (Min) (V) 3.5 Battery charge voltage (Max) (V) 4.52 Absolute Vin (safety rating) (Max) ((V)) 22 Control interface I2C Features BAT temp thermistor monitoring (JEITA profile), IC thermal regulation, IINDPM (Input current limit), Input OVP, Power Path, USB OTG integrated, VINDPM (Input voltage threshold to maximize adaptor power) Operating Vin (Min) (V) 3.9 Rating Catalog
WQFN (RTW) 24 16 mm² 4 x 4
  • Single chip solution to charge wearable accessories from adapter or battery
  • High-efficiency, 1.5-MHz, synchronous switch-mode buck charger
    • 95.5% charge efficiency at 0.5 A and 94.5% efficiency at 1 A
    • ±0.5% charge voltage regulation (10-mV step)
    • I2C programmable JEITA profile of charge voltage, current and temperature thresholds
    • Low termination current with high accuracy 20 mA±10 mA
    • Small inductor form factor of 2.5 x 2.0 x 1.0 mm3
  • Boost mode with output from 4.6 V to 5.15 V
    • 94% boost efficiency at 1-A output
    • Integrated control to switch between Charge and Boost mode
    • PMID_GOOD pin control external PMOS FET for protection against fault conditions
  • Single input supporting USB input, high-voltage adapter, or wireless power
    • Support 4-V to 13.5-V input voltage range with 22-V absolute max input rating
    • Programmable input current limit (IINDPM) with I2C (100 mA to 3.2 A, 100-mA/step)
    • Maximum power tracking by input voltage limit (VINDPM) up to 5.4 V
    • VINDPM threshold automatically tracks battery voltage
  • Narrow VDC (NVDC) power path management
    • System instant-on with no battery or deeply discharged battery
  • Flexible I2C configuration and autonomous charging for optimal system performance
  • High integration includes all MOSFETs, current sensing and loop compensation
  • Low RDSON 19.5-mΩ BATFET to minimize charging loss and extend battery run time
    • BATFET control for Ship mode, and full system reset with and without adapter
  • 7-µA low battery leakage current in Ship mode
  • 9.5-µA low battery leakage current with system standby
  • High accuracy battery charging profile
    • ±6% charge current regulation
    • ±7.5% input current regulation
    • Remote battery sensing to charge faster
    • Programmable top-off timer for full battery charging
  • Safety Related Certifications:
    • IEC 62368-1 CB Certification
  • Single chip solution to charge wearable accessories from adapter or battery
  • High-efficiency, 1.5-MHz, synchronous switch-mode buck charger
    • 95.5% charge efficiency at 0.5 A and 94.5% efficiency at 1 A
    • ±0.5% charge voltage regulation (10-mV step)
    • I2C programmable JEITA profile of charge voltage, current and temperature thresholds
    • Low termination current with high accuracy 20 mA±10 mA
    • Small inductor form factor of 2.5 x 2.0 x 1.0 mm3
  • Boost mode with output from 4.6 V to 5.15 V
    • 94% boost efficiency at 1-A output
    • Integrated control to switch between Charge and Boost mode
    • PMID_GOOD pin control external PMOS FET for protection against fault conditions
  • Single input supporting USB input, high-voltage adapter, or wireless power
    • Support 4-V to 13.5-V input voltage range with 22-V absolute max input rating
    • Programmable input current limit (IINDPM) with I2C (100 mA to 3.2 A, 100-mA/step)
    • Maximum power tracking by input voltage limit (VINDPM) up to 5.4 V
    • VINDPM threshold automatically tracks battery voltage
  • Narrow VDC (NVDC) power path management
    • System instant-on with no battery or deeply discharged battery
  • Flexible I2C configuration and autonomous charging for optimal system performance
  • High integration includes all MOSFETs, current sensing and loop compensation
  • Low RDSON 19.5-mΩ BATFET to minimize charging loss and extend battery run time
    • BATFET control for Ship mode, and full system reset with and without adapter
  • 7-µA low battery leakage current in Ship mode
  • 9.5-µA low battery leakage current with system standby
  • High accuracy battery charging profile
    • ±6% charge current regulation
    • ±7.5% input current regulation
    • Remote battery sensing to charge faster
    • Programmable top-off timer for full battery charging
  • Safety Related Certifications:
    • IEC 62368-1 CB Certification

The BQ25618/619 integrates charge, boost converter and voltage protection in a single device. It offers the industry’s lowest termination current for switching chargers to charge wearable devices by full battery capacity. The BQ25618/619 best-in-class low quiescent current reduces battery leakage down to 6 uA in Ship mode, which conserves battery energy to double the shelf life for the device. BQ25619 is in 4x4 QFN package for easy layout. BQ25618 is in 2.0x2.4mm2 WCSP package for space limited design.

The BQ25618/619 integrates charge, boost converter and voltage protection in a single device. It offers the industry’s lowest termination current for switching chargers to charge wearable devices by full battery capacity. The BQ25618/619 best-in-class low quiescent current reduces battery leakage down to 6 uA in Ship mode, which conserves battery energy to double the shelf life for the device. BQ25619 is in 4x4 QFN package for easy layout. BQ25618 is in 2.0x2.4mm2 WCSP package for space limited design.
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Technical documentation

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Type Title Date
* Data sheet BQ25618/619 I2C Controlled 1-Cell 1.5-A Battery Charger with 20-mA Termination and 1-A Boost Operation datasheet (Rev. D) PDF | HTML 23 Dec 2021
Application note Selection of Single-Cell Buck Narrow VDC Switching Battery Chargers PDF | HTML 10 Nov 2022
User guide BQ25611D, BQ25619 (BMS025) Evaluation Module User's Guide (Rev. C) PDF | HTML 01 Jul 2022
Technical article Benefits of rechargeable batteries in real-time location system trackers 10 Aug 2020
Technical article Overcoming common design challenges in an UV sterilization box system 27 Jul 2020
Application note High-Efficiency Charging for TWS Using a 2-Pin Interface Application Report 18 Jun 2020
Technical article When to use rechargeable batteries in small battery applications 01 Oct 2019
Technical article Overcoming design challenges for low quiescent current in small, battery-powered devices 29 Aug 2019
Application note How to Design Tiny, Long-Lasting, and Safe Battery Products With Switching Charg 29 Aug 2019

Design & development

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

Evaluation board

BQ25619EVM — I2C controlled 1-cell, 3-A buck battery charger evaluation module with power-path and 1.2-A boost op

The BQ25619 evaluation module (EVM) is used to evaluate the BQ25619 device. This is a 3-A single-cell battery charger optimized for power bank applications in low-power portable designs. The OTG reverse synchronous boost operation and forward buck mode operation allows for control over power (...)
User guide: PDF | HTML
Not available on TI.com
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WQFN (RTW) 24 View options

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