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Battery charger ICs

BQ24052

ACTIVE

1-cell, 1-A, Li-ion battery charger with automatic AC/USB detection, Rntc=100k

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Data sheet

BQ24052

ACTIVE
Data sheet Order now

Product details

Number of series cells 1 Charge current (max) (A) 1 Vin (max) (V) 6.45 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) 30 Control topology Linear Control interface Standalone (RC-Settable) Features BAT temp thermistor monitoring (JEITA profile), BAT temp thermistor monitoring (hot/cold profile), IC thermal regulation, Input OVP, USB D+/D-/BC1.2 integrated, VINDPM (Input voltage threshold to maximize adaptor power) Vin (min) (V) 3.5 Rating Catalog Operating temperature range (°C) 0 to 125
Number of series cells 1 Charge current (max) (A) 1 Vin (max) (V) 6.45 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) 30 Control topology Linear Control interface Standalone (RC-Settable) Features BAT temp thermistor monitoring (JEITA profile), BAT temp thermistor monitoring (hot/cold profile), IC thermal regulation, Input OVP, USB D+/D-/BC1.2 integrated, VINDPM (Input voltage threshold to maximize adaptor power) Vin (min) (V) 3.5 Rating Catalog Operating temperature range (°C) 0 to 125
WSON (DSQ) 10 4 mm² 2 x 2
  • Charging
    • 1% Charge voltage accuracy
    • 10% Charge current accuracy
    • Pin selectable USB 100-mA and 500-mA maximum input current limit
    • Programmable termination and precharge threshold
  • 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
    • Operation over JEITA range through battery NTC - ½ fast-charge-current at cold, 4.06 V at hot
    • Fixed 10-hour safety timer
  • System
    • Auto input source detection (D+, D– pins)
      • No device transceiver required
      • USB Friendly
    • Automatic termination and timer disable mode (TTDM) for absent battery pack with thermistor
    • Status indication – charging/done
    • Available in small 2-mm × 2-mm package
  • Charging
    • 1% Charge voltage accuracy
    • 10% Charge current accuracy
    • Pin selectable USB 100-mA and 500-mA maximum input current limit
    • Programmable termination and precharge threshold
  • 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
    • Operation over JEITA range through battery NTC - ½ fast-charge-current at cold, 4.06 V at hot
    • Fixed 10-hour safety timer
  • System
    • Auto input source detection (D+, D– pins)
      • No device transceiver required
      • USB Friendly
    • Automatic termination and timer disable mode (TTDM) for absent battery pack with thermistor
    • Status indication – charging/done
    • Available in small 2-mm × 2-mm package

The BQ2405x series of devices are highly integrated Li-Ion and Li-Pol linear chargers devices targeted at space-limited portable applications. The devices operate from either a USB port or AC adapter. The high-input voltage range with input overvoltage protection supports low-cost unregulated adapters.

The BQ2405x 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 precharge current and termination current threshold are programmed through an external resistor. The fast charge current value is also programmable through an external resistor.

The BQ2405x series of devices are highly integrated Li-Ion and Li-Pol linear chargers devices targeted at space-limited portable applications. The devices operate from either a USB port or AC adapter. The high-input voltage range with input overvoltage protection supports low-cost unregulated adapters.

The BQ2405x 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 precharge current and termination current threshold are programmed through an external resistor. The fast charge current value is also programmable through an external resistor.
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Technical documentation

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Type Title Date
* Data sheet BQ2405x 1-A, Single-Cell Li-Ion and Li-Pol Battery Charger With Automatic Adaptor and USB Detection datasheet (Rev. D) PDF | HTML 26 May 2021
Application note BQ2404x, BQ2405x, and BQ2409x Frequently Asked Questions 25 Feb 2019
Application note Selecting the Best bq2404x/5x/9x Single Cell Battery Charger for your Applicatio 29 Nov 2012
User guide 0.8-A, Single-Input, Single-Cell Li-Ion Battery Charger UG 29 Sep 2009

Design & development

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Gerber file

Linear Charger NTC Calculator

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WSON (DSQ) 10 Ultra Librarian
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