Product details

Number of series cells 1, 2, 3, 4, 5 Charge current (max) (A) 16.2 Vin (max) (V) 26 Cell chemistry Lead Acid, Li-Ion/Li-Polymer, Lithium Phosphate/LiFePO4, NiCd, NiMH, SuperCap Battery charge voltage (min) (V) 1.024 Battery charge voltage (max) (V) 23 Absolute max Vin (max) (V) 32 Control topology Switch-Mode Buck-boost Control interface I2C Features IC thermal regulation, ICO (Input Current Optimization), IINDPM (Input current limit), Input OVP, Integrated ADC, Power Path, USB C/PD compatible, USB OTG integrated, VINDPM (Input voltage threshold to maximize adaptor power) Vin (min) (V) 3.5 Rating Catalog Operating temperature range (°C) -40 to 85
Number of series cells 1, 2, 3, 4, 5 Charge current (max) (A) 16.2 Vin (max) (V) 26 Cell chemistry Lead Acid, Li-Ion/Li-Polymer, Lithium Phosphate/LiFePO4, NiCd, NiMH, SuperCap Battery charge voltage (min) (V) 1.024 Battery charge voltage (max) (V) 23 Absolute max Vin (max) (V) 32 Control topology Switch-Mode Buck-boost Control interface I2C Features IC thermal regulation, ICO (Input Current Optimization), IINDPM (Input current limit), Input OVP, Integrated ADC, Power Path, USB C/PD compatible, USB OTG integrated, VINDPM (Input voltage threshold to maximize adaptor power) Vin (min) (V) 3.5 Rating Catalog Operating temperature range (°C) -40 to 85
WQFN (RSN) 32 16 mm² 4 x 4
  • Power path control through battery MOSFET implementing independent system voltage instant-on with no battery or depleted battery
  • 400kHz/800kHz programmable switching frequency for high efficiency/high power density
  • Buck-boost narrow voltage DC (NVDC) charger for USB-C Power Delivery (PD) interface platform
    • 3.5V to 26V input range to charge 1- to 5-cell battery
    • Charge current up to 16.2A/8.1A with 128mA/64mA resolution based on 5mΩ/10mΩ sensing resistor
    • Input current limit up to 10A/6.35A with 100mA/50mA resolution based on 5mΩ/10mΩ sensing resistor
    • Support USB 2.0, USB 3.0, USB 3.1 and USB Power Delivery (PD)
    • Input Current Optimizer (ICO) to extract max input power without overloading the adapter
    • Seamless transition between buck, buck-boost, and boost operations
    • Input current and voltage regulation (IINDPM and VINDPM) against source overload
  • TI patented switching frequency dithering pattern for EMI noise reduction
  • TI patented Pass Through Mode (PTM) for system power efficiency improvement and battery fast charging achieving 99% efficiency.
  • Input and battery current monitor through dedicated pins
  • Integrated 8-bit ADC to monitor voltage, current and power
  • Battery MOSFET ideal diode operation in supplement mode to support system when adapter is fully loaded
  • Power up USB port from battery (USB OTG)
    • 3V to 24V OTG with 8mV resolution
    • Output current limit up to 12.7A/6.35A with 100mA/50mA resolution based on 5mΩ/10mΩ sensing resistor
  • I2C host control interface for flexible system configuration
  • High accuracy for the regulation and monitor
    • ±0.5% Charge voltage regulation
    • ±3% Charge current regulation
    • ±2.5% Input current regulation
    • ±2% Input/charge current monitor
  • Safety
    • Thermal shutdown
    • Input, system, battery overvoltage protection
    • Input, MOSFET, inductor overcurrent protection
  • Safety-Related Certifications
    • IEC 62368-1 CB Certification
  • Package: 32-Pin 4.0mm × 4.0mm WQFN
  • Power path control through battery MOSFET implementing independent system voltage instant-on with no battery or depleted battery
  • 400kHz/800kHz programmable switching frequency for high efficiency/high power density
  • Buck-boost narrow voltage DC (NVDC) charger for USB-C Power Delivery (PD) interface platform
    • 3.5V to 26V input range to charge 1- to 5-cell battery
    • Charge current up to 16.2A/8.1A with 128mA/64mA resolution based on 5mΩ/10mΩ sensing resistor
    • Input current limit up to 10A/6.35A with 100mA/50mA resolution based on 5mΩ/10mΩ sensing resistor
    • Support USB 2.0, USB 3.0, USB 3.1 and USB Power Delivery (PD)
    • Input Current Optimizer (ICO) to extract max input power without overloading the adapter
    • Seamless transition between buck, buck-boost, and boost operations
    • Input current and voltage regulation (IINDPM and VINDPM) against source overload
  • TI patented switching frequency dithering pattern for EMI noise reduction
  • TI patented Pass Through Mode (PTM) for system power efficiency improvement and battery fast charging achieving 99% efficiency.
  • Input and battery current monitor through dedicated pins
  • Integrated 8-bit ADC to monitor voltage, current and power
  • Battery MOSFET ideal diode operation in supplement mode to support system when adapter is fully loaded
  • Power up USB port from battery (USB OTG)
    • 3V to 24V OTG with 8mV resolution
    • Output current limit up to 12.7A/6.35A with 100mA/50mA resolution based on 5mΩ/10mΩ sensing resistor
  • I2C host control interface for flexible system configuration
  • High accuracy for the regulation and monitor
    • ±0.5% Charge voltage regulation
    • ±3% Charge current regulation
    • ±2.5% Input current regulation
    • ±2% Input/charge current monitor
  • Safety
    • Thermal shutdown
    • Input, system, battery overvoltage protection
    • Input, MOSFET, inductor overcurrent protection
  • Safety-Related Certifications
    • IEC 62368-1 CB Certification
  • Package: 32-Pin 4.0mm × 4.0mm WQFN

The BQ25730 is a synchronous NVDC buck-boost battery charge controller to charge a 1- to 5-cell battery from a wide range of input sources including USB adapter, high voltage USB-C Power Delivery (PD) sources, and traditional adapters. It offers a low component count, high efficiency solution for space constrained, 1- to 5-cell battery charging applications. The Narrow VDC buck-boost architecture avoid direct power path from input source to system voltage which implements wide input voltage range and narrow system voltage range at same time. Narrow system voltage range is valuable for faster battery supplement and lower MOSFET rating for next stage converter.

The NVDC configuration allows the system to be regulated based on battery voltage, but not drop below system minimum voltage. The system keeps operating even when the battery is completely discharged or removed. When load power exceeds input source rating, the battery goes into supplement mode and prevents the system from crashing.

During power up, the charger sets the converter to a buck, boost, or buck-boost configuration based on the input source and battery conditions. The charger seamlessly transitions between the buck, boost, and buck-boost operation modes without host control.

In the absence of an input source, the BQ25730 supports the USB On-the-Go (OTG) function from a 1- to 5-cell battery to generate an adjustable 3V to 24V output on VBUS with 8mV resolution. The OTG output voltage transition slew rate can be configured to comply with the USB-PD 3.0 PPS specification.

The latest version of the USB-C PD specification includes Fast Role Swap (FRS) to ensure power role swapping occurs in a timely fashion so that the device(s) connected to the dock can avoid experiencing momentary power loss or glitching. This device integrates FRS in compliance with the PD specification.

TI patented switching frequency dithering pattern can significantly reduce EMI noise over the whole conductive EMI frequency range (150kHz to 30MHz). Multiple dithering scale options are available to provide flexibility for different applications to simplify EMI noise filter design.

The charger can be operated in the TI patented Pass Through Mode (PTM) to improve efficiency over the full load range. In PTM, input power is directly passed through the charger to the system. Switching losses of the MOSFETs and inductor core loss can be saved for high efficiency operation.

The BQ25730 is available in a 32-pin 4mm × 4mm WQFN package.

The BQ25730 is a synchronous NVDC buck-boost battery charge controller to charge a 1- to 5-cell battery from a wide range of input sources including USB adapter, high voltage USB-C Power Delivery (PD) sources, and traditional adapters. It offers a low component count, high efficiency solution for space constrained, 1- to 5-cell battery charging applications. The Narrow VDC buck-boost architecture avoid direct power path from input source to system voltage which implements wide input voltage range and narrow system voltage range at same time. Narrow system voltage range is valuable for faster battery supplement and lower MOSFET rating for next stage converter.

The NVDC configuration allows the system to be regulated based on battery voltage, but not drop below system minimum voltage. The system keeps operating even when the battery is completely discharged or removed. When load power exceeds input source rating, the battery goes into supplement mode and prevents the system from crashing.

During power up, the charger sets the converter to a buck, boost, or buck-boost configuration based on the input source and battery conditions. The charger seamlessly transitions between the buck, boost, and buck-boost operation modes without host control.

In the absence of an input source, the BQ25730 supports the USB On-the-Go (OTG) function from a 1- to 5-cell battery to generate an adjustable 3V to 24V output on VBUS with 8mV resolution. The OTG output voltage transition slew rate can be configured to comply with the USB-PD 3.0 PPS specification.

The latest version of the USB-C PD specification includes Fast Role Swap (FRS) to ensure power role swapping occurs in a timely fashion so that the device(s) connected to the dock can avoid experiencing momentary power loss or glitching. This device integrates FRS in compliance with the PD specification.

TI patented switching frequency dithering pattern can significantly reduce EMI noise over the whole conductive EMI frequency range (150kHz to 30MHz). Multiple dithering scale options are available to provide flexibility for different applications to simplify EMI noise filter design.

The charger can be operated in the TI patented Pass Through Mode (PTM) to improve efficiency over the full load range. In PTM, input power is directly passed through the charger to the system. Switching losses of the MOSFETs and inductor core loss can be saved for high efficiency operation.

The BQ25730 is available in a 32-pin 4mm × 4mm WQFN package.

Download View video with transcript Video

Similar products you might be interested in

open-in-new Compare alternates
Pin-for-pin with same functionality to the compared device
BQ25720 ACTIVE SMBus 1- to 4-cell NVDC buck-boost battery charge controller with power path and USB-C® PD OTG This product is a 1-4-cell SMBus buck-boost NVDC charge controller with power path and 800-kHz/1.2-MHz programmable switching frequency.
Same functionality with different pin-out to the compared device
BQ25731 ACTIVE I2C 1-5 cell NVDC buck-boost battery charge controller with USB type-C PD support This product is non power path.
Similar functionality to the compared device
BQ25792 ACTIVE I2C controlled, 5-A, 1-4 cell buck-boost charger with dual-input selector and USB PD 3.0 OTG output This product has integrated FETs.

Technical documentation

star =Top documentation for this product selected by TI
No results found. Please clear your search and try again.
View all 6
Type Title Date
* Data sheet BQ25730 I2C 1- to 5-Cell Buck-Boost Narrow VDC Battery Charge Controller with Power Path Control and USB-C PD 3.0 OTG Output datasheet (Rev. A) PDF | HTML 24 Jan 2024
Application note Layout Guide for Buck-Boost Charger BQ257XX Series PDF | HTML 30 Jan 2024
Application note LiFePO4 Design Considerations PDF | HTML 26 Jul 2023
Application note Autonomous Smart Battery Guide PDF | HTML 15 Oct 2021
Certificate BQ25730EVM EU RoHS Declaration of Conformity (DoC) 16 Feb 2021
EVM User's guide BQ2573x Evaluation Module (Rev. A) PDF | HTML 19 Jan 2021

Design & development

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

Evaluation board

BQ25730EVM — I2C NVDC 1 to 5 cell, 16-A buck-boost battery charge controller evaluation module

The BQ25730EVM evaluation module (EVM) is an I2C controlled NVDC (narrow voltage DC) buck boost charge controller with N-channel MOSFET selector and current monitoring. The input voltage range, for the buck converter, is between 3.5 V and 26 V, with a programmable output of 1 to 5 cells and a (...)
User guide: PDF | HTML
Not available on TI.com
Application software & framework

TI-CHARGER-GUI — GUI software for use with USB2ANY & battery charging evaluation modules

The TI-CHARGER-GUI offers a web-based or standalone graphical user interface to assist in the process of evaluating, designing with, configuring or testing battery charger products. The software provides full access to registers and an easy interface to send and sequence commands.
Package Pins CAD symbols, footprints & 3D models
WQFN (RSN) 32 Ultra Librarian

Ordering & quality

Information included:
  • RoHS
  • REACH
  • Device marking
  • Lead finish/Ball material
  • MSL rating/Peak reflow
  • MTBF/FIT estimates
  • Material content
  • Qualification summary
  • Ongoing reliability monitoring
Information included:
  • Fab location
  • Assembly location

Recommended products may have parameters, evaluation modules or reference designs related to this TI product.

Support & training

TI E2E™ forums with technical support from TI engineers

Content is provided "as is" by TI and community contributors and does not constitute TI specifications. See terms of use.

If you have questions about quality, packaging or ordering TI products, see TI support. ​​​​​​​​​​​​​​

Videos