USB Friendly 0.5A Li+ Charger w/ Dynamic Power Management, 10.5V OVP - BQ24232

BQ24232 (ACTIVE)

USB Friendly 0.5A Li+ Charger w/ Dynamic Power Management, 10.5V OVP

 

Description

The bq2423x series of devices are highly integrated Li-ion linear chargers and system power-path management devices targeted at space-limited portable applications. The devices operate from either a USB port or ac adapter and support charge currents between 25 mA and 500 mA. The high-input-voltage range with input overvoltage protection supports low-cost, unregulated adapters. The USB input current limit accuracy and start-up sequence allow the bq2423x to meet USB-IF inrush current specification. Additionally, the input dynamic power management (VIN-DPM) prevents the charger from crashing poorly designed or incorrectly configured USB sources.

The bq2423x features dynamic power-path management (DPPM) that powers the system while simultaneously and independently charging the battery. The DPPM circuit reduces the charge current when the input current limit causes the system output to fall to the DPPM threshold, thus supplying the system load at all times while monitoring the charge current separately. This feature reduces the number of charge and discharge cycles on the battery, allows for proper charge termination, and enables the system to run with a defective or absent battery pack. Additionally, this enables instant system turn-on even with a totally discharged battery. The power-path management architecture also permits the battery to supplement the system current requirements when the adapter cannot deliver the peak system currents, enabling the use of a smaller adapter.

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 the 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 input current limit and charge current are programmable using external resistors.

Features

  • Fully Compliant USB Charger
    • Selectable 100-mA and 500-mA Maximum
      Input Current
    • 100-mA Maximum Current Limit Ensures
      Compliance to USB-IF Standard
    • Input-based Dynamic Power Management
      (VIN- DPM) for Protection Against Poor USB
      Sources
  • 28-V Input Rating With Overvoltage Protection
  • Integrated Dynamic Power-Path Management
    (DPPM) Function Simultaneously and
    Independently Powers the System and Charges
    the Battery
  • Supports up to 500-mA Charge Current With
    Current Monitoring Output (ISET)
  • Programmable Input Current Limit up to 500 mA
    for Wall Adapters
  • Programmable Termination Current (bq24232)
  • Programmable Precharge and Fast-Charge Safety
    Timers
  • Reverse Current, Short-Circuit, and Thermal
    Protection
  • NTC Thermistor Input
  • Proprietary Start-Up Sequence Limits Inrush
    Current
  • Status Indication – Charging/Done, Power Good
  • Small 3 mm × 3 mm 16-Lead QFN Package
  • APPLICATIONS
    • Bluetooth™ Devices
    • Low-Power Handheld Devices

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Parametrics Compare all products in Battery Charger IC

 
# Series Cells
Function
Cell Chemistry
Battery Charge Voltage (Min) (V)
Battery Charge Voltage (Max) (V)
Special Features
Charge Current (Max) (A)
Control Interface
USB Feature
Rating
Operating Temperature Range (C)
Pin/Package
Operating Vin (Min) (V)
Operating Vin (Max) (V)
Absolute Vin (safety rating) (Max) ((V))
BQ24232 BQ24090 BQ24230 BQ24232H BQ25100 BQ25100H BQ25101 BQ25120 BQ25121
1    1    1    1    1    1    1    1    1   
Charger    Charger    Charger    Charger    Charger    Charger    Charger    Charger    Charger   
Li-Ion/Li-Polymer    Li-Ion/Li-Polymer    Li-Ion/Li-Polymer    Li-Ion/Li-Polymer    Li-Ion/Li-Polymer    Li-Ion/Li-Polymer    Li-Ion/Li-Polymer    Li-Ion/Li-Polymer    Li-Ion/Li-Polymer   
4.2    4.2    4.4    4.35    4.2    4.35    4.2    3.6    3.6   
4.2    4.2    4.4    4.35    4.2    4.35    4.2    4.65    4.65   
Power Path
Temp Monitoring (Thermistor Pin)
Vin DPM (OK for Solar Power Source)   
Temp Monitoring (Thermistor Pin)
Thermal Regulation
Vin DPM (OK for Solar Power Source)   
Power Path
Temp Monitoring (Thermistor Pin)
Vin DPM (OK for Solar Power Source)   
Power Path
Temp Monitoring (Thermistor Pin)   
JEITA BAT Temp Monitoring (Thermistor Pin)
Temp Monitoring (Thermistor Pin)
Thermal Regulation
Vin DPM (OK for Solar Power Source)   
JEITA BAT Temp Monitoring (Thermistor Pin)
Temp Monitoring (Thermistor Pin)
Thermal Regulation
Vin DPM (OK for Solar Power Source)   
JEITA BAT Temp Monitoring (Thermistor Pin)
Temp Monitoring (Thermistor Pin)
Thermal Regulation
Vin DPM (OK for Solar Power Source)   
Integrated Buck Converter
Integrated LDO
JEITA BAT Temp Monitoring (Thermistor Pin)
Power Path
Temp Monitoring (Thermistor Pin)
Thermal Regulation   
Integrated Buck Converter
Integrated LDO
JEITA BAT Temp Monitoring (Thermistor Pin)
Power Path
Temp Monitoring (Thermistor Pin)
Thermal Regulation   
0.5    1    0.5    0.5    0.25    0.25    0.25    0.3    0.3   
Standalone (RC-Settable)    Standalone (RC-Settable)    Standalone (RC-Settable)    Standalone (RC-Settable)    Standalone (RC-Settable)    Standalone (RC-Settable)      I2C    I2C   
N/A    N/A    N/A    N/A    N/A    N/A    N/A    N/A    N/A   
Catalog    Catalog    Catalog    Catalog    Catalog    Catalog    Catalog    Catalog    Catalog   
-40 to 85    0 to 125    -40 to 85    -40 to 85    0 to 125    0 to 125    0 to 125    -40 to 85    -40 to 85   
16QFN    10MSOP-PowerPAD    16QFN    16QFN    6DSBGA    6DSBGA    6DSBGA    25DSBGA    25DSBGA   
4.35    4.45    4.35    4.35    4.45    4.45    4.45    3.4    3.4   
10.2    6.45    6.4    10.2    6.45    30    30    5.5    5.5   
28    12    28    28    30    30    30    20    20   

WEBENCH® Designer BQ24232

Battery Specifications:
Chemistry Lithium Ion/Lithium Polymer
  Series Parallel
Cell Count
Cell Capacity  mAh  
Total Capacity mAh  
Charger Specifications:
  Min   Max Range
Vin  V 4.35 to 10.2V
Iin  A ≤ 0.5A
Vchg  V 4.16 to 4.23V
Ichg  A ≤ 0.5A
Ambient Temp  °C -40 to 85°C