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BQ21040

AKTIV

Batterielader, Li-Ion und Li-Polymer, 1 Zelle, 0,8 A

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Selbe Funktionalität wie der verglichene Baustein bei abweichender Anschlussbelegung
BQ25170 AKTIV Linearer Batterielader, 800 mA, für 1 Zelle (Li-Ion oder LiFePO4) BQ25170 comes with lower quiescent current and flexible charge voltage.

BQ21040

AKTIV
Datenblatt Jetzt bestellen

Produktdetails

Rating Catalog Number of series cells 1 Cell chemistry Li-Ion/Li-Polymer Charge current (max) (A) 0.8 Features BAT temp thermistor monitoring (hot/cold profile), Input OVP Vin (min) (V) 3.5 Vin (max) (V) 6.45 Absolute max Vin (max) (V) 30 Control topology Linear Battery charge voltage (min) (V) 4.2 Battery charge voltage (max) (V) 4.2 Control interface Standalone (RC-Settable) Operating temperature range (°C) 0 to 125
Rating Catalog Number of series cells 1 Cell chemistry Li-Ion/Li-Polymer Charge current (max) (A) 0.8 Features BAT temp thermistor monitoring (hot/cold profile), Input OVP Vin (min) (V) 3.5 Vin (max) (V) 6.45 Absolute max Vin (max) (V) 30 Control topology Linear Battery charge voltage (min) (V) 4.2 Battery charge voltage (max) (V) 4.2 Control interface Standalone (RC-Settable) Operating temperature range (°C) 0 to 125
SOT-23 (DBV) 6 8.12 mm² 2.9 x 2.8
  • Charging
    • 1% Charge Voltage Accuracy
    • 10% Charge Current Accuracy
    • Low Battery Leakage Current (1 µA)
    • Programmable Charge Current using External Resistor up to 800 mA
    • 4.2-V Li-Ion and Li-Pol Charger
  • Protection
    • 30-V Input Rating; with 6.6-V Input Overvoltage Protection
    • Input Voltage Dynamic Power Management
    • 125°C Thermal Regulation; 150°C Thermal Shutdown Protection
    • OUT Short-Circuit Protection and ISET Short Detection
    • Overtemperature Sensing Protection Through NTC
    • Fixed 10-Hour Safety Timer
  • System
    • Status Indication – Charging/Done
    • Available in Small SOT-23 Package
  • Charging
    • 1% Charge Voltage Accuracy
    • 10% Charge Current Accuracy
    • Low Battery Leakage Current (1 µA)
    • Programmable Charge Current using External Resistor up to 800 mA
    • 4.2-V Li-Ion and Li-Pol Charger
  • Protection
    • 30-V Input Rating; with 6.6-V Input Overvoltage Protection
    • Input Voltage Dynamic Power Management
    • 125°C Thermal Regulation; 150°C Thermal Shutdown Protection
    • OUT Short-Circuit Protection and ISET Short Detection
    • Overtemperature Sensing Protection Through NTC
    • Fixed 10-Hour Safety Timer
  • System
    • Status Indication – Charging/Done
    • Available in Small SOT-23 Package

The bq21040 device is a highly integrated Li-Ion and Li-Pol linear battery charger device targeted at space-limited portable applications. The device operates from either a USB port or AC adapter. The high input voltage range with input overvoltage protection supports low-cost unregulated adapters.

The bq21040 has a single power output that charges the battery. A system load can be placed in parallel with the battery as long as the average system load does not keep the battery from charging fully during the 10 hour safety timer.

The battery is charged in three phases: conditioning, constant current and constant voltage. In all charge phases, an internal control loop monitors the IC junction temperature and reduces the charge current if an internal temperature threshold is exceeded.

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 termination. The pre-charge current and termination current threshold are fixed to 20% and 10%, respectively. The fast charge current value is programmable through an external resistor.

The bq21040 device is a highly integrated Li-Ion and Li-Pol linear battery charger device targeted at space-limited portable applications. The device operates from either a USB port or AC adapter. The high input voltage range with input overvoltage protection supports low-cost unregulated adapters.

The bq21040 has a single power output that charges the battery. A system load can be placed in parallel with the battery as long as the average system load does not keep the battery from charging fully during the 10 hour safety timer.

The battery is charged in three phases: conditioning, constant current and constant voltage. In all charge phases, an internal control loop monitors the IC junction temperature and reduces the charge current if an internal temperature threshold is exceeded.

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 termination. The pre-charge current and termination current threshold are fixed to 20% and 10%, respectively. The fast charge current value is programmable through an external resistor.
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Technische Dokumentation

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Top-Dokumentation Typ Titel Format-Optionen Datum
* Data sheet bq21040 0.8-A, Single-Input, Single Cell Li-Ion and Li-Pol Battery Charger datasheet (Rev. D) PDF | HTML 08 Jan 2019
Application note Temperature Sensing Without an Adaptor Present on the BQ21040 PDF | HTML 15 Sep 2022
Application note BQ2404x, BQ2405x, and BQ2409x Frequently Asked Questions 25 Feb 2019
Analog Design Journal 2Q 2016 Analog Applications Journal Issue 26 Apr 2016
Analog Design Journal Battery-charging considerations for low-power applications 26 Apr 2016

Design und Entwicklung

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Evaluierungsplatine

BQ21040EVM-777 — BQ21040 0,8-A Einzel-Eingang, Einzel-Zellen-Li-Ion-Batterielader – Evaluierungsmodul

Die Bausteine der Serie bq2404x sind hochintegrierte lineare Li-Ion-Ladegeräte für portable Anwendungen mit begrenztem Platz. Die Geräte werden entweder über einen USB-Anschluss oder einen Netzadapter betrieben und verfügen über einen einzelnen Stromausgang zum Aufladen des Akkus. Eine Systemlast (...)
Benutzerhandbuch: PDF
Nicht verfügbar auf TI.com
Gehäuse Pins CAD-Symbole, Footprints und 3D-Modelle
SOT-23 (DBV) 6 Ultra Librarian
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