Produktdetails

Number of series cells 1, 2, 3, 4, 5, 6, 7, 8 Charge current (max) (A) 10 Vin (max) (V) 28 Cell chemistry SuperCap Battery charge voltage (min) (V) 2.1 Battery charge voltage (max) (V) 26 Absolute max Vin (max) (V) 33 Control topology Switch-Mode Buck Control interface Standalone (RC-Settable) Features BAT temp thermistor monitoring (hot/cold profile) Vin (min) (V) 5 Rating Catalog Operating temperature range (°C) -40 to 85
Number of series cells 1, 2, 3, 4, 5, 6, 7, 8 Charge current (max) (A) 10 Vin (max) (V) 28 Cell chemistry SuperCap Battery charge voltage (min) (V) 2.1 Battery charge voltage (max) (V) 26 Absolute max Vin (max) (V) 33 Control topology Switch-Mode Buck Control interface Standalone (RC-Settable) Features BAT temp thermistor monitoring (hot/cold profile) Vin (min) (V) 5 Rating Catalog Operating temperature range (°C) -40 to 85
VQFN (RVA) 16 12.25 mm² 3.5 x 3.5
  • Charge Super Capacitor Pack From 2.1 V to 26 V
  • CC/CV Charge Profile From 0 V Without
    Precharge
  • 600-kHz NMOS-NMOS Synchronous Buck
    Controller
  • Over 90% Efficiency for up to 10-A Charge
    Current
  • 5-V to 28-V VCC Input Voltage Range
  • Accuracy
    • ±0.5% Charge Voltage Regulation
    • ±3% Charge Current Regulation
  • High Integration
    • Internal Loop Compensation
    • Internal Digital Soft Start
  • Safety
    • Input Overvoltage Protection
    • Capacitor Temperature Sensing Hot and Cold
      Charge Suspend
    • Thermal Shutdown
  • Status Outputs
    • Adapter Present
    • Charger Operation Status
  • Charge Enable Pin
  • 30-ns Driver Dead Time and 99.5% Maximum
    Effective Duty Cycle
  • Automatic Sleep Mode for Low Power
    Consumption
    • <15-µA Off-State Super Capacitor Discharge
      Current
    • <1.5-mA Off-State Input Quiescent Current
  • APPLICATIONS
    • Memory Backup Systems
    • Industrial UPS Systems and Power Transient Buffering
    • Bridge Power to Buffer the Battery

All other trademarks are the property of their respective owners

  • Charge Super Capacitor Pack From 2.1 V to 26 V
  • CC/CV Charge Profile From 0 V Without
    Precharge
  • 600-kHz NMOS-NMOS Synchronous Buck
    Controller
  • Over 90% Efficiency for up to 10-A Charge
    Current
  • 5-V to 28-V VCC Input Voltage Range
  • Accuracy
    • ±0.5% Charge Voltage Regulation
    • ±3% Charge Current Regulation
  • High Integration
    • Internal Loop Compensation
    • Internal Digital Soft Start
  • Safety
    • Input Overvoltage Protection
    • Capacitor Temperature Sensing Hot and Cold
      Charge Suspend
    • Thermal Shutdown
  • Status Outputs
    • Adapter Present
    • Charger Operation Status
  • Charge Enable Pin
  • 30-ns Driver Dead Time and 99.5% Maximum
    Effective Duty Cycle
  • Automatic Sleep Mode for Low Power
    Consumption
    • <15-µA Off-State Super Capacitor Discharge
      Current
    • <1.5-mA Off-State Input Quiescent Current
  • APPLICATIONS
    • Memory Backup Systems
    • Industrial UPS Systems and Power Transient Buffering
    • Bridge Power to Buffer the Battery

All other trademarks are the property of their respective owners

The bq24640 device is a highly integrated switched-mode super capacitor charge controller. The device offers a constant-frequency synchronous PWM controller with high accuracy charge current, voltage regulation, and charge status monitoring.

The bq24640 charges a super capacitor in two phases: constant current and constant voltage (CC/CV). The device can charge super capacitors from 0 V with current set on the ISET pin. When the super capacitor voltage reaches the programmed target voltage, charge current begins tapering down.

The bq24640 enters a low-current sleep mode
(<15 µA) when the input voltage falls below the output capacitor voltage.

The bq24640 has an input CE pin to enable and disable charge, and the STAT and PG output pins report charge and adapter status. The TS pin on the bq24640 monitors the temperature of the capacitor and suspends charge during hot and cold conditions.

The bq24640 device is a highly integrated switched-mode super capacitor charge controller. The device offers a constant-frequency synchronous PWM controller with high accuracy charge current, voltage regulation, and charge status monitoring.

The bq24640 charges a super capacitor in two phases: constant current and constant voltage (CC/CV). The device can charge super capacitors from 0 V with current set on the ISET pin. When the super capacitor voltage reaches the programmed target voltage, charge current begins tapering down.

The bq24640 enters a low-current sleep mode
(<15 µA) when the input voltage falls below the output capacitor voltage.

The bq24640 has an input CE pin to enable and disable charge, and the STAT and PG output pins report charge and adapter status. The TS pin on the bq24640 monitors the temperature of the capacitor and suspends charge during hot and cold conditions.

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Technische Dokumentation

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Alle anzeigen 4
Typ Titel Datum
* Data sheet bq24640 High-Efficiency Synchronous Switched-Mode Super Capacitor Charger datasheet (Rev. A) PDF | HTML 31 Jul 2015
Application note How to Quickly and Safely Charge Supercapacitors PDF | HTML 27 Mär 2023
Application note BQ241xx/BQ246xx Selection of Multi-Cell Standalone Switching Battery Chargers 31 Dez 2019
User guide Multi Cell Synchronous Switch-Mode Charger, EVM (HPA421) 18 Feb 2010

Design und Entwicklung

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

Evaluierungsplatine

BQ24640EVM — Evaluierungsmodul für BQ24640 Multizellen-Synchron-Switchmode-Ladegerät

Evaluation Module for bq24600/bq24620/bq24640. the bq24600 is a highly integrated Li-ion or Li-polymer switch-mode battery charge controller. The bq24620 is highly integrated switch-mode battery charge controller designed specifically to charge Lithium Phosphate battery chemistries. The bq24640 is (...)

Benutzerhandbuch: PDF
Berechnungstool

SLUC175 bq246xx Calculation Tool V1.5

Unterstützte Produkte und Hardware

Unterstützte Produkte und Hardware

Produkte
Batterielader-ICs
BQ24600 Eigenständiger 1–6-Zellen-Abwärts-Batterie-Laderegler BQ24610 Eigenständiger 1–6 Zellen-Abwärts-Batterie-Laderegler mit 5 V–28 V-Eingang BQ24616 Eigenständiger 1–6 Zellen-Abwärts-Batterie-Laderegler mit JEITA-Konformität BQ24617 Eigenständiger 1–5 Zellen-Abwärts-Batterieladeregler mit 5 V–24 V-Eingang BQ24618 Eigenständiger 1–6-Zellen-Abwärts-Batterie-Laderegler mit USB-Anschluss und 5 V–28 V-Eingang BQ24620 Eigenständiger 1–7-Zellen-Abwärts-Batterieladeregler für Lithium-Phosphat-Batterien BQ24630 Eigenständiger 1–7-Zellen-Abwärts-Batterielader-Controller für LiFePO4-Batterien mit Systemstromvers BQ24640 Eigenständiger 1–8-Zellen-Abwärts-Batterieladeregler für Superkondensator BQ24650 Eigenständiger 1–6-Zellen-Abwärts-Batterieladeregler mit Solareingang und integriertem MPPT
Referenzdesigns

PMP7327 — 28 Vdc-Eingang, Super-Cap-Ladegerät mit Aufwärtswandler für Bus-Holddup – Referenzdesign

This reference design uses the BQ24640 super cap charging controller to charge a large bank of super caps to a voltage below the input bus voltage. During an input bus dropout, the energy from the super caps is used to power a boost converter that can supply 10A of output current at 26.2V. This (...)
Test report: PDF
Schaltplan: PDF
Gehäuse Pins Herunterladen
VQFN (RVA) 16 Optionen anzeigen

Bestellen & Qualität

Beinhaltete Information:
  • RoHS
  • REACH
  • Bausteinkennzeichnung
  • Blei-Finish/Ball-Material
  • MSL-Rating / Spitzenrückfluss
  • MTBF-/FIT-Schätzungen
  • Materialinhalt
  • Qualifikationszusammenfassung
  • Kontinuierliches Zuverlässigkeitsmonitoring
Beinhaltete Information:
  • Werksstandort
  • Montagestandort

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