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BQ24002

ACTIVE

1-cell, 1.2-A, linear Li-ion battery charger with integrated FET, two LED

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Data sheet

A newer version of this product is available

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BQ25170 ACTIVE 800-mA linear battery charger for 1-cell Li-ion and LiFePO4 Supports multiple resistor programmable battery voltage with lower IQ

BQ24002

ACTIVE
Data sheet Order now

Product details

Number of series cells 1 Charge current (max) (A) 1.2 Vin (max) (V) 10 Cell chemistry Li-Ion/Li-Polymer Battery charge voltage (min) (V) 4.2 Battery charge voltage (max) (V) 4.2 Absolute max Vin (max) (V) 13.5 Control topology Linear Control interface Standalone (RC-Settable) Features BAT temp thermistor monitoring (hot/cold profile) Vin (min) (V) 4.5 Rating Catalog Operating temperature range (°C) 0 to 0
Number of series cells 1 Charge current (max) (A) 1.2 Vin (max) (V) 10 Cell chemistry Li-Ion/Li-Polymer Battery charge voltage (min) (V) 4.2 Battery charge voltage (max) (V) 4.2 Absolute max Vin (max) (V) 13.5 Control topology Linear Control interface Standalone (RC-Settable) Features BAT temp thermistor monitoring (hot/cold profile) Vin (min) (V) 4.5 Rating Catalog Operating temperature range (°C) 0 to 0
HTSSOP (PWP) 20 41.6 mm² 6.5 x 6.4 VQFN (RGW) 20 25 mm² 5 x 5
  • Highly Integrated Solution With FET Pass Transistor and Reverse-Blocking Schottky and Thermal Protection
  • Integrated Voltage and Current Regulation With Programmable Charge Current
  • High-Accuracy Voltage Regulation (±1%)
  • Ideal for Low-Dropout Linear Charger Designs for Single-Cell Li-Ion Packs With Coke or Graphite Anodes
  • Up to 1.2-A Continuous Charge Current
  • Safety-Charge Timer During Preconditioning and Fast Charge
  • Integrated Cell Conditioning for Reviving Deeply Discharged Cells and Minimizing Heat Dissipation During Initial Stage of Charge
  • Optional Temperature or Input-Power Monitoring Before and During Charge
  • Various Charge-Status Output Options for Driving Single, Double, or Bicolor LEDs or Host-Processor Interface
  • Charge Termination by Minimum Current and Time
  • Low-Power Sleep Mode
  • Packaging: 5 mm × 5 mm MLP or 20-Lead TSSOP PowerPAD™
  • APPLICATIONS
    • PDAs
    • Internet Appliances
    • MP3 Players
    • Digital Cameras

PowerPAD is a trademark of Texas Instruments.
  • Highly Integrated Solution With FET Pass Transistor and Reverse-Blocking Schottky and Thermal Protection
  • Integrated Voltage and Current Regulation With Programmable Charge Current
  • High-Accuracy Voltage Regulation (±1%)
  • Ideal for Low-Dropout Linear Charger Designs for Single-Cell Li-Ion Packs With Coke or Graphite Anodes
  • Up to 1.2-A Continuous Charge Current
  • Safety-Charge Timer During Preconditioning and Fast Charge
  • Integrated Cell Conditioning for Reviving Deeply Discharged Cells and Minimizing Heat Dissipation During Initial Stage of Charge
  • Optional Temperature or Input-Power Monitoring Before and During Charge
  • Various Charge-Status Output Options for Driving Single, Double, or Bicolor LEDs or Host-Processor Interface
  • Charge Termination by Minimum Current and Time
  • Low-Power Sleep Mode
  • Packaging: 5 mm × 5 mm MLP or 20-Lead TSSOP PowerPAD™
  • APPLICATIONS
    • PDAs
    • Internet Appliances
    • MP3 Players
    • Digital Cameras

PowerPAD is a trademark of Texas Instruments.

The bq2400x series ICs are advanced Li-Ion linear charge management devices for highly integrated and space-limited applications. They combine high-accuracy current and voltage regulation; FET pass-transistor and reverse-blocking Schottky; battery conditioning, temperature, or input-power monitoring; charge termination; charge-status indication; and charge timer in a small package.

The bq2400x measures battery temperature using an external thermistor. For safety reasons, the bq2400x inhibits charge until the battery temperature is within the user-defined thresholds. Alternatively, the user can monitor the input voltage to qualify charge. The bq2400x series then charge the battery in three phases: preconditioning, constant current, and constant voltage. If the battery voltage is below the internal low-voltage threshold, the bq2400x uses low-current precharge to condition the battery. A preconditioning timer is provided for additional safety. Following pre-conditioning, the bq2400x applies a constant-charge current to the battery. An external sense-resistor sets the magnitude of the current. The constant-current phase is maintained until the battery reaches the charge-regulation voltage. The bq2400x then transitions to the constant voltage phase. The user can configure the device for cells with either coke or graphite anodes. The accuracy of the voltage regulation is better than ±1% over the operating junction temperature and supply voltage range.

Charge is terminated by maximum time or minimum taper current detection

The bq2400x automatically restarts the charge if the battery voltage falls below an internal recharge threshold.

The bq2400x series ICs are advanced Li-Ion linear charge management devices for highly integrated and space-limited applications. They combine high-accuracy current and voltage regulation; FET pass-transistor and reverse-blocking Schottky; battery conditioning, temperature, or input-power monitoring; charge termination; charge-status indication; and charge timer in a small package.

The bq2400x measures battery temperature using an external thermistor. For safety reasons, the bq2400x inhibits charge until the battery temperature is within the user-defined thresholds. Alternatively, the user can monitor the input voltage to qualify charge. The bq2400x series then charge the battery in three phases: preconditioning, constant current, and constant voltage. If the battery voltage is below the internal low-voltage threshold, the bq2400x uses low-current precharge to condition the battery. A preconditioning timer is provided for additional safety. Following pre-conditioning, the bq2400x applies a constant-charge current to the battery. An external sense-resistor sets the magnitude of the current. The constant-current phase is maintained until the battery reaches the charge-regulation voltage. The bq2400x then transitions to the constant voltage phase. The user can configure the device for cells with either coke or graphite anodes. The accuracy of the voltage regulation is better than ±1% over the operating junction temperature and supply voltage range.

Charge is terminated by maximum time or minimum taper current detection

The bq2400x automatically restarts the charge if the battery voltage falls below an internal recharge threshold.
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* Data sheet Single-Cell Li-Ion Charge Management IC for PDAs and Internet Appliances datasheet (Rev. E) 09 Nov 2004

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