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BQ25173

ACTIVE

800-mA linear charger for 1-cell to 4-cell supercapacitor

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Data sheet

BQ25173

ACTIVE
Data sheet Order now

Product details

Number of series cells 1, 2, 3, 4 Charge current (max) (A) 0.8 Vin (max) (V) 18 Cell chemistry SuperCap Battery charge voltage (max) (V) 10.5 Absolute max Vin (max) (V) 40 Control topology Linear Control interface Standalone (RC-Settable) Features IC thermal regulation, Input OVP Vin (min) (V) 3 Rating Catalog Operating temperature range (°C) -40 to 125
Number of series cells 1, 2, 3, 4 Charge current (max) (A) 0.8 Vin (max) (V) 18 Cell chemistry SuperCap Battery charge voltage (max) (V) 10.5 Absolute max Vin (max) (V) 40 Control topology Linear Control interface Standalone (RC-Settable) Features IC thermal regulation, Input OVP Vin (min) (V) 3 Rating Catalog Operating temperature range (°C) -40 to 125
WSON (DSG) 8 4 mm² 2 x 2
  • Input voltage up-to 40-V tolerant
  • Automatic Sleep mode for low power consumption
    • 350-nA leakage current
    • 2-µA input leakage current when charge disabled
  • Supports 1- to 4-cell supercapacitor
  • Supports charging supercapacitor from 0 V
  • External resistor programmable operation
    • FB pin to adjust supercapacitor regulation voltage
    • ISET to set charge current from 10 mA to 800 mA
  • High accuracy
    • ±1% charge voltage accuracy
    • ±10% charge current accuracy
  • Charging features
    • CE pin for charging function control
    • Open-drain output for status and fault indication
    • Open-drain output for power-good indication
  • Integrated fault protection
    • 18-V IN overvoltage protection
    • 1000-mA overcurrent protection
    • 125°C thermal regulation; 150°C thermal shutdown protection
    • OUT short-circuit protection
    • ISET pin short/open protection
  • Input voltage up-to 40-V tolerant
  • Automatic Sleep mode for low power consumption
    • 350-nA leakage current
    • 2-µA input leakage current when charge disabled
  • Supports 1- to 4-cell supercapacitor
  • Supports charging supercapacitor from 0 V
  • External resistor programmable operation
    • FB pin to adjust supercapacitor regulation voltage
    • ISET to set charge current from 10 mA to 800 mA
  • High accuracy
    • ±1% charge voltage accuracy
    • ±10% charge current accuracy
  • Charging features
    • CE pin for charging function control
    • Open-drain output for status and fault indication
    • Open-drain output for power-good indication
  • Integrated fault protection
    • 18-V IN overvoltage protection
    • 1000-mA overcurrent protection
    • 125°C thermal regulation; 150°C thermal shutdown protection
    • OUT short-circuit protection
    • ISET pin short/open protection

The BQ25173 is an integrated 800-mA linear charger for 1- to 4-cell supercapacitors targeted at space-limited applications. The device has a single power output that charges the supercapacitor. The system load can be placed in parallel with the supercapacitor; the charge current is shared between the system and supercapacitor.

During charging, an internal control loop monitors the IC junction temperature and reduces the charge current if the internal temperature threshold, TREG, is exceeded. This feature allows for fast charging of a fully discharged supercapacitor.

The charger power stage and charge current sense functions are fully integrated. The charger function has high accuracy current and voltage regulation loops, charge status display, and charge function control. The charge voltage and fast-charge current are programmable through external resistors.

The BQ25173 is an integrated 800-mA linear charger for 1- to 4-cell supercapacitors targeted at space-limited applications. The device has a single power output that charges the supercapacitor. The system load can be placed in parallel with the supercapacitor; the charge current is shared between the system and supercapacitor.

During charging, an internal control loop monitors the IC junction temperature and reduces the charge current if the internal temperature threshold, TREG, is exceeded. This feature allows for fast charging of a fully discharged supercapacitor.

The charger power stage and charge current sense functions are fully integrated. The charger function has high accuracy current and voltage regulation loops, charge status display, and charge function control. The charge voltage and fast-charge current are programmable through external resistors.
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Technical documentation

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Type Title Date
* Data sheet BQ25173 800-mA Linear Battery Charger for 1- to 4-Cell Supercapacitor datasheet 15 Nov 2021
Application note How to Quickly and Safely Charge Supercapacitors PDF | HTML 27 Mar 2023
Application brief Selecting the Correct Charger for Your Supercapacitor Designs PDF | HTML 13 Dec 2021
User guide BQ25173EVM Evaluation Module User's Guide 30 Nov 2021
Certificate BQ25173EVM EU RoHS Declaration of Conformity (DoC) 20 Oct 2021

Design & development

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Evaluation board

BQ25173EVM — BQ25173 evaluation module 800-mA linear charger for 1-cell to 4-cell super capacitor

The BQ25173EVM evaluation module (EVM) is designed to help evaluate and test the various operating modes of the BQ25173, a linear charger IC for 1-cell to 4-cell super capacitor. Charging voltage can be adjusted using external resistor divider between OUT and FB. Charging current can be set from 10 (...)

User guide: PDF
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WSON (DSG) 8 View options
TI's Standard Terms and Conditions for Evaluation Items apply.

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