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Product details

Parameters

Number of series cells 1, 2, 3, 4 Charge current (Max) (A) 8.128 Operating Vin (Max) (V) 24 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) 19.2 Absolute Vin (safety rating) (Max) ((V)) 30 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, Solar input/MPPT, USB C/PD compatible, USB OTG integrated, VINDPM (Input voltage threshold to maximize adaptor power) Operating Vin (Min) (V) 3.5 Rating Catalog open-in-new Find other Battery charger ICs

Package | Pins | Size

WQFN (RSN) 32 16 mm² 4 x 4 open-in-new Find other Battery charger ICs

Features

  • Charge 1- to 4-Cell Battery From Wide Range of Input Sources
    • 3.5-V to 24-V Input Operating Voltage
    • Supports USB2.0, USB 3.0, USB 3.1 (Type C), and USB_PD Input Current Settings
    • Seamless Transition Between Buck and Boost Operation
    • Input Current and Voltage Regulation (IDPM and VDPM) Against Source Overload
  • Power/Current Monitor for CPU Throttling
    • Comprehensive PROCHOT Profile, IMVP8 Compliant
    • Input and Battery Current Monitor
    • System Power Monitor, IMVP8 Compliant
  • Narrow-VDC (NVDC) Power Path Management
    • Instant-On With No Battery or Deeply Discharged Battery
    • Battery Supplements System When Adapter is Fully-Loaded
  • Power Up USB Port From Battery (USB OTG)
    • Output 4.48-V to 20.8-V Compatible With USB PD
    • Output Current Limit up to 6.35 A
  • 800-kHz or 1.2-MHz Programmable Switching Frequency for 1-µH to 3.3-µH Inductor
  • Host Control Interface for Flexible System Configuration
    • I2C (bq25703A) Port for Optimal System Performance and Status Reporting
    • Hardware Pin to Set Input Current Limit Without EC Control
  • Integrated ADC to Monitor Voltage, Current and Power
  • High Accuracy Regulation and Monitor
    • ±0.5% Charge Voltage Regulation
    • ±2% Input/Charge Current Regulation
    • ±2% Input/Charge Current Monitor
    • ±5% Power Monitor
  • Safety
    • Thermal Shutdown
    • Input, System, Battery Overvoltage Protection
    • MOSFET Inductor Overcurrent Protection
  • Low Battery Quiescent Current
  • Input Current Optimizer (ICO) to Extract Max Input Power
  • Charge Any Battery Chemistry: Li+, LiFePO4, NiCd, NiMH, Lead Acid
  • Package: 32-Pin 4 × 4 WQFN

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Description

The bq25703A is a synchronous NVDC battery buck-boost charge controller, offering low component count, high efficiency solution for space-constraint, multi-chemistry battery charging applications.

The NVDC-1 configuration allows the system to be regulated at 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.

The bq25703A charges battery from a wide range of input sources including USB adapter, high voltage USB PD sources and traditional adapters.

During power up, the charger sets converter to buck, boost or buck-boost configuration based on input source and battery conditions. The charger automatically transits among buck, boost and buck-boost configuration without host control.

In the absence of an input source, the bq25703A supports On-the-Go (OTG) function from 1- to 4-cell battery to generate 4.48 V to 20.8 V on VBUS. During OTG mode, the charger regulates output voltage and output current.

The bq25703A monitors adapter current, battery current and system power. The flexibly programmed PROCHOT output goes directly to CPU for throttle back when needed.

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BQ25713 ACTIVE NVDC I2C address 1 buck-boost battery charger controller compatible with USB type C PD This product supports USB PD 3.0 PPS specification
NEW BQ25731 PREVIEW I2C 1-5 cell NVDC buck-boost battery charge controller with USB type-C PD support This product supports 1-5S with programmable switching frequency
Similar but not functionally equivalent to the compared device:
NEW BQ25792 PREVIEW I2C controlled, 5-A, 1-4 cell buck-boost charger with dual-input selector and USB PD 3.0 OTG output This product is 5A, 1-4S I2C buck-boost switching charger with autonomous charging and integated FETs

Technical documentation

= Top documentation for this product selected by TI
No results found. Please clear your search and try again. View all 9
Type Title Date
* Datasheet bq25703A I2C Multi-Chemistry Battery Buck-Boost Charge Controller With System Power Monitor and Processor Hot Monitor datasheet (Rev. A) May 31, 2018
Technical articles When to use rechargeable batteries in small battery applications Oct. 01, 2019
White paper USB Type-C and USB power delivery power path design considerations (Rev. A) Jun. 12, 2019
Application note Buck boost charger with power path for Super Cap Aug. 02, 2018
Technical articles Optimizing solar power with battery chargers May 23, 2018
Technical articles Transform the way you charge your devices with USB Type-C and PD Jul. 18, 2017
Application note Layout Guidelines for the bq2570x Switching Charger May 19, 2017
User guide bq2570x Evaluation Module May 12, 2016
Technical articles Should I use a linear charger or a switching charger? Oct. 30, 2015

Design & development

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

Hardware development

EVALUATION BOARD Download
149
Description
The bq25700A evaluation module (EVM) is an I2C controlled NVDC (narrow voltage DC) buck boost charge controller with N-CH MOSFET Selector and Current Monitoring. The input voltage range, for the buck converter, is between 3.5V and 24 V, with a programmable output of 1–4 cells and a charge (...)
Features
  • Host-controlled NVDC 1S-4S battery buck boost charger with 3.5V~24V input
  • Ultra low quiescent current of 600 μA and high PFM light load efficiency >80% at 20 mA load to meet energy star and ErP Lot6
  • High integration charger has comprehensive /PROCHOT, input and battery current monitor (IADP/IBAT (...)

Software development

APPLICATION SOFTWARE & FRAMEWORK Download
Battery Management Studio (bqStudio) Software
BQSTUDIO 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 (...)
Features
  • Real-time Gauge Dashboard for monitoring basic registers
  • Full register access and logging
  • Full data memory access and logging
  • Product configuration and monitoring tools
  • Import and export of product configurations
  • Calibration and test automation
  • Export of FS files for the target production environment 

Reference designs

REFERENCE DESIGNS Download
Automotive Dual USB Type-C™ PD DFP 5/9/12/15V Output Car Charger Reference Design
PMP40312 — PMP40312 is a dual port USB Type-C™ PD car charger reference design. The design's normal input voltage range is from 9V to 14.5V, and the maximum input voltage can be to 42V.The pure analog configuration for the USB type-C source controller--TPS25740B makes the PD negotiation easy. The (...)
document-generic Schematic
REFERENCE DESIGNS Download
Bi-directional Battery Power System +USB A 5V2A Output Reference Design
PMP40294 — The PMP40294 reference design is designed for a high capacity battery packs which requires more and more charging and discharging power. It can support a wide input voltgae (5~20V) from any adaptor and deliver the maximal charging current up to 3A to a 3S battery pack. By adopting the bi-directional (...)
document-generic Schematic

CAD/CAE symbols

Package Pins Download
QFN (RSN) 32 View options

Ordering & quality

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  • Lead finish/Ball material
  • MSL rating/Peak reflow
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  • Qualification summary
  • Ongoing reliability monitoring

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