Startseite Batteriemanagement-ICs Batterielader-ICs
Startseite
Batteriemanagement-ICs
Batterielader-ICs

BQ2057W

AKTIV

Linearer Li-Ion-Low-Dropout-Batterieladeregler, 2 Zellen mit AutoCompTM, 8,4 V

Datenblatt

BQ2057W

AKTIV
Datenblatt

Produktdetails

Rating Catalog Number of series cells 2 Cell chemistry Li-Ion/Li-Polymer Charge current (max) (A) 2 Features BAT temp thermistor monitoring (hot/cold profile) Vin (min) (V) 4.5 Vin (max) (V) 15 Absolute max Vin (max) (V) 18 Control topology Linear Battery charge voltage (min) (V) 8.4 Battery charge voltage (max) (V) 8.4 Control interface Standalone (RC-Settable) Operating temperature range (°C) to
Rating Catalog Number of series cells 2 Cell chemistry Li-Ion/Li-Polymer Charge current (max) (A) 2 Features BAT temp thermistor monitoring (hot/cold profile) Vin (min) (V) 4.5 Vin (max) (V) 15 Absolute max Vin (max) (V) 18 Control topology Linear Battery charge voltage (min) (V) 8.4 Battery charge voltage (max) (V) 8.4 Control interface Standalone (RC-Settable) Operating temperature range (°C) to
  • Ideal for single (4.1 V or 4.2 V) and dual-cell (8.2 V or 8.4 V) Li-ion or Li-pol packs
  • Requires small number of external components
  • 0.3-V dropout voltage for minimizing heat dissipation
  • Better than ±1% voltage regulation accuracy with preset voltages
  • AutoCompM dynamic compensation of battery pack’s internal impedance to reduce charge time
  • Optional cell-temperature monitoring before and during charge
  • Integrated voltage and current regulation with programmable charge-current and high- or low-side current sensing
  • Integrated cell conditioning for reviving deeply discharged cells and minimizing heat dissipation during initial stage of charge
  • Charge status output for single or dual led or host processor interface
  • Automatic battery-recharge feature
  • Charge termination by minimum current
  • Automatic low-power sleep mode when VCC is removed
  • EVMs available for quick evaluation
  • Packaging: 8-pin SOIC, 8-pin TSSOP, 8-pin MSOP
  • Ideal for single (4.1 V or 4.2 V) and dual-cell (8.2 V or 8.4 V) Li-ion or Li-pol packs
  • Requires small number of external components
  • 0.3-V dropout voltage for minimizing heat dissipation
  • Better than ±1% voltage regulation accuracy with preset voltages
  • AutoCompM dynamic compensation of battery pack’s internal impedance to reduce charge time
  • Optional cell-temperature monitoring before and during charge
  • Integrated voltage and current regulation with programmable charge-current and high- or low-side current sensing
  • Integrated cell conditioning for reviving deeply discharged cells and minimizing heat dissipation during initial stage of charge
  • Charge status output for single or dual led or host processor interface
  • Automatic battery-recharge feature
  • Charge termination by minimum current
  • Automatic low-power sleep mode when VCC is removed
  • EVMs available for quick evaluation
  • Packaging: 8-pin SOIC, 8-pin TSSOP, 8-pin MSOP

The BQ2057 series advanced lithium-ion (Li-ion) and lithium-polymer (Li-pol) linear charge-management ICs are designed for cost-sensitive and compact portable electronics. They combine high-accuracy current and voltage regulation, battery conditioning, temperature monitoring, charge termination, charge-status indication, and AutoComp™ charge-rate compensation in a single 8-pin IC. MSOP, TSSOP, and SOIC package options are offered to fit a wide range of end applications.

The BQ2057 continuously measures battery temperature using an external thermistor. For safety, the BQ2057 inhibits charge until the battery temperature is within user-defined thresholds. The BQ2057 then charges the battery in three phases: conditioning, constant current, and constant voltage. If the battery voltage is below the low-voltage threshold, V(min), the BQ2057 precharges using a low current to condition the battery. The conditioning charge rate is approximately 10% of the regulation current. The conditioning current also minimizes heat dissipation in the external pass-element during the initial stage of the charge. After conditioning, the BQ2057 applies a constant current to the battery. An external sense-resistor sets the current. The sense-resistor can be on either the high or low side of the battery without additional components. The constant-current phase continues until the battery reaches the charge-regulation voltage.

The BQ2057 then begins the constant-voltage phase. The accuracy of the voltage regulation is better than ±1% over the operating-temperature and supply-voltage ranges. For single and dual cells, the BQ2057 is offered in four fixed-voltage versions: 4.1 V, 4.2 V, 8.2 V, and 8.4 V. Charge stops when the current tapers to the charge termination threshold, I(TERM). The BQ2057 automatically restarts the charge if the battery voltage falls below the V(RCH) threshold.

The designer also may use the AutoComp feature to reduce charging time. This proprietary technique allows safe and dynamic compensation for the internal impedance of the battery pack during charge.

The BQ2057 series advanced lithium-ion (Li-ion) and lithium-polymer (Li-pol) linear charge-management ICs are designed for cost-sensitive and compact portable electronics. They combine high-accuracy current and voltage regulation, battery conditioning, temperature monitoring, charge termination, charge-status indication, and AutoComp™ charge-rate compensation in a single 8-pin IC. MSOP, TSSOP, and SOIC package options are offered to fit a wide range of end applications.

The BQ2057 continuously measures battery temperature using an external thermistor. For safety, the BQ2057 inhibits charge until the battery temperature is within user-defined thresholds. The BQ2057 then charges the battery in three phases: conditioning, constant current, and constant voltage. If the battery voltage is below the low-voltage threshold, V(min), the BQ2057 precharges using a low current to condition the battery. The conditioning charge rate is approximately 10% of the regulation current. The conditioning current also minimizes heat dissipation in the external pass-element during the initial stage of the charge. After conditioning, the BQ2057 applies a constant current to the battery. An external sense-resistor sets the current. The sense-resistor can be on either the high or low side of the battery without additional components. The constant-current phase continues until the battery reaches the charge-regulation voltage.

The BQ2057 then begins the constant-voltage phase. The accuracy of the voltage regulation is better than ±1% over the operating-temperature and supply-voltage ranges. For single and dual cells, the BQ2057 is offered in four fixed-voltage versions: 4.1 V, 4.2 V, 8.2 V, and 8.4 V. Charge stops when the current tapers to the charge termination threshold, I(TERM). The BQ2057 automatically restarts the charge if the battery voltage falls below the V(RCH) threshold.

The designer also may use the AutoComp feature to reduce charging time. This proprietary technique allows safe and dynamic compensation for the internal impedance of the battery pack during charge.
filter Andere Batterielader-ICs suchen
Herunterladen Video mit Transkript ansehen Video

Technische Dokumentation

star =Von TI ausgewählte Top-Empfehlungen für dieses Produkt
Keine Ergebnisse gefunden. Bitte geben Sie einen anderen Begriff ein und versuchen Sie es erneut.
Alle anzeigen 1
Typ Titel Datum
* Data sheet Advanced Linear Charge Mgmt IC for Single/Two-Cell Lithium-Ion & Lithium-Polymer datasheet (Rev. G) 23 Dez 2022

Design und Entwicklung

Weitere Bedingungen oder erforderliche Ressourcen enthält gegebenenfalls die Detailseite, die Sie durch Klicken auf einen der unten stehenden Titel erreichen.

GUI für Evaluierungsmodul (EVM)

SLVC024 — bq24715 EVM GUI Package

Unterstützte Produkte und Hardware

Unterstützte Produkte und Hardware

Produkte
Batterielader-ICs
BQ2000 — Switchmode-Batterielader für verschiedene chemische Zusammensetzungen mit Spitzenspannungserkennung- BQ2000T — Switchmode-Batterielader für mehrere chemische Zusammensetzungen mit dT/dt-Terminierung BQ2002 — NiCd/NiMH-Laderegler mit negativem DV, PVT und Aufladezeit-Setup1 BQ2002C — NiCd/NiMH-Batterie-Laderegler mit negativem DV, PVT BQ2002D — Batterieladeregler für NiCd/NiMH mit dT/dt-Terminierung BQ2002E — NiCd/NiMH-Batterieladeregler mit negativem dV, PVT und tMTO setup1 BQ2002F — NiCd/NiMH-Batterieladeregler mit negativem DV, PVT und Ladezeiteinstellung2 BQ2002G — NiCd/NiMH-Batterieladeregler mit negativem dV, PVT und tMTO setup2 BQ2002T — NiCd/NiMH-Batterieladeregler mit dT/dt-Abschluss und Niedertemperaturfehler BQ2031 — Switchmode-Bleisäurelader mit vom Benutzer auswählbaren Ladealgorithmen BQ2057C — Linearer Li-Ion-Low-Dropout-Batterieladeregler, 1 Zellen mit AutoCompTM, 4,2 V BQ2057W — Linearer Li-Ion-Low-Dropout-Batterieladeregler, 2 Zellen mit AutoCompTM, 8,4 V BQ24010 — Einzelliger linearer 1-A-Li-Ion-Akkulader, mit AC-Erkennung und Temperaturerfassung in einem QFN-11- BQ24012 — Lineares 1-Zellen-1-A-Li-Ion-Akkuladegerät mit FET, AC-Present- und Ladeaktivierung in einem QFN-12- BQ24013 — Einzelliger linearer 1-A-Li-Ion-Akkulader, mit Lade- und Term.-Aktivierung in einem QFN-11-Gehäuse BQ24200 — 500-mA-, 4,2-V-Li-Ion-Ladegerät für strombegrenzte Anw. mit Temperaturerfassung in einem MSOP-8-Gehä BQ24201 — 500-mA-, 4,1-V-Li-Ion-Ladegerät für strombegrenzte Anw. mit Temperaturerfassung in einem MSOP-8-Gehä BQ24202 — 500-mA-, 4,2-V-Li-Ion-Ladegerät für strombegrenzte Anw. mit Ladestatus in einem MSOP-8-Gehäuse BQ24203 — 500-mA-, 4,1-V-Li-Ion-Ladegerät für strombegrenzte Anw. mit Ladestatus in einem MSOP-8-Gehäuse BQ24205 — 500-mA-, 4,1-V-Li-Ion-Ladegerät für strombegrenzte Anw. im MSOP-8-Gehäuse BQ24715 — SMBus 2–3-Zellen-NVDC-Abwärts-Batterieladeregler mit N-Kanal-MOSFET-Selektoren
Herunterladen
Es gelten die allgemeinen Geschäftsbedingungen von TI für Evaluierungsartikel.

Empfohlene Produkte können Parameter, Evaluierungsmodule oder Referenzdesigns zu diesem TI-Produkt beinhalten.

Support und Schulungen

TI E2E™-Foren mit technischem Support von TI-Ingenieuren

Alle Forenthemen auf Englisch anzeigen

Inhalte werden ohne Gewähr von TI und der Community bereitgestellt. Sie stellen keine Spezifikationen von TI dar. Siehe Nutzungsbedingungen.

Bei Fragen zu den Themen Qualität, Gehäuse oder Bestellung von TI-Produkten siehe TI-Support. ​​​​​​​​​​​​​​

Videos