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Professional supply IC BQ25703A I2C 1-4 cell NVDC Buck-Boost battery charge controller with system power monitor & processor

Manufacturer
TI
Manufacturer Product Number
BQ25703A
Description

The bq25703A is a synchronous NVDC battery buck-boost charge controller

Package Condition
REEL
Datasheet

Product Descriptions

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.

Product 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

Specifications

Attribute Attribute value
ANSM-Part# ANSM-BQ25703A
Manufacturer TI
Number of series cells 1, 2, 3, 4
Charge current (max) (A) 8.128
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 max Vin (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)
Vin (min) (V) 3.5
Rating Catalog
Operating temperature range (°C) -40 to 85
Package WQFN (RSN) 32

Actual product photos

BQ25703A

Product Data Book:

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For more product information, please download the PDF

Payment&Transportation

详情8.1

Official Certificate&Certificate

详情页3.1

Multiple product supply

详情5.1

Company office environment

详情6.1

Warehouse Real Shot

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Standard packaging

详情9

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Professional supply IC BQ25703A I2C 1-4 cell NVDC Buck-Boost battery charge controller with system power monitor & processor

The bq25703A is a synchronous NVDC battery buck-boost charge controller

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