BQ24780S 1-4 Cell Hybrid Power Boost Mode Battery Charge Controller with Power and Processor Hot Monitoring | TI.com

BQ24780S (ACTIVE)

1-4 Cell Hybrid Power Boost Mode Battery Charge Controller with Power and Processor Hot Monitoring

 

Description

The bq24780S device is a high-efficiency, synchronous battery charger, offering low component count for space-constrained, multi-chemistry battery charging applications.

The bq24780S device supports hybrid power boost mode (previously called "turbo boost mode"). It allows battery discharge energy to system when system power demand is temporarily higher than adapter maximum power level. Therefore, adapter does not crash.

The bq24780S device uses two charge pumps to separately drive N-channel MOSFETs (ACFET, RBFET, and BATFET) for automatic system power source selection.

Through SMBus, system power management microcontroller programs input current, charge current, discharge current, and charge voltage DACs with high regulation accuracies.

The bq24780S device monitors adapter current (IADP), battery discharge current (IDCHG), and system power (PMON) for host to throttle back CPU speed or reduce system power when needed.

The bq24780S device charges 1-, 2-, 3-, or 4-series Li+ cells.

Features

  • Industrial Innovative Charge Controller With Hybrid Power Boost Mode
    • Adapter and Battery Provides Power to System Together for Intel® CPU Turbo Mode
    • Ultra-Fast Transient Response of 150 µs to Enter Boost Mode
    • Hybrid Power Boost Mode from 4.5- to 24-V System
    • Charge 1- to 4-Cell Battery Pack from 4.5- to 24-V Adapter
  • High Accuracy Power and Current Monitoring for CPU Throttling
    • Comprehensive PROCHOT Profile
    • ± 2% Current Monitor Accuracy
    • ± 5% System Power Monitor Accuracy (PMON)
  • Automatic NMOS Power Source Selection from Adapter or Battery
    • ACFET Fast Turn on in 100 µs
  • Programmable Input Current, Charge Voltage, Charge and Discharge Current Limit
    • ±0.4% Charge Voltage (16-mV step)
    • ±2% Input Current (128-mA/step)
    • ±2% Charge Current (64-mA/step)
    • ±2% Discharge Current (512-mA/step)
  • High Integration
    • Battery LEARN Function
    • Battery Present Monitor
    • Boost Mode Indicator
    • Loop Compensation
    • BTST Diode
  • Enhanced Safety Features for Overvoltage Protection, Overcurrent Protection, Battery, Inductor, and MOSFET Short-Circuit Protection
  • Switching Frequency: 600 kHz, 800 kHz, and
    1 MHz
  • Realtime System Control on ILIM Pin to Limit Charge and Discharge Current
  • 0.65 mA Adapter Standby Quiescent Current for Energy Star

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Parametrics

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Part number Order Number of series cells Function Cell chemistry Charge current (Max) (A) Operating Vin (Min) (V) Operating Vin (Max) (V) Absolute Vin (safety rating) (Max) ((V)) Battery charge voltage (Min) (V) Battery charge voltage (Max) (V) Features Control interface Control topology Rating Operating temperature range (C) Package Group Package size: mm2:W x L (PKG)
BQ24780S Order now 1
2
3
4    
Charger     Lead Acid
Li-Ion/Li-Polymer
Lithium Phosphate/LiFePO4
NiCd
NiMH    
8.128     4.5     24     30     1.024     19.2     OVP
Power Path
Thermal Regulation
UVLO
VINDPM    
SMBus     Switch-Mode Buck     Catalog     -40 to 85     WQFN | 28     28WQFN: 16 mm2: 4 x 4 (WQFN | 28)    
BQ25700A Order now 1
2
3
4    
Charger     Lead Acid
Li-Ion/Li-Polymer
Lithium Phosphate/LiFePO4
NiCd
NiMH
SuperCap    
8.128     3.5     24     30     1.024     19.2     ICO
IINDPM
Integrated ADC
USB OTG
OVP
Power Path
Solar Input
Thermal Regulation
UVLO
VINDPM
USB C/PD    
SMBus     Switch-Mode Buck-boost     Catalog     -40 to 85     QFN | 32     32QFN: 16 mm2: 4 x 4 (QFN | 32)    
BQ25703A Order now 1
2
3
4    
Charger     Lead Acid
Li-Ion/Li-Polymer
Lithium Phosphate/LiFePO4
NiCd
NiMH
SuperCap    
8.128     3.5     24     30     1.024     19.2     ICO
IINDPM
Integrated ADC
USB OTG
OVP
Power Path
Solar Input
Thermal Regulation
UVLO
VINDPM
USB C/PD    
I2C     Switch-Mode Buck-boost     Catalog     -40 to 85     QFN | 32     32QFN: 16 mm2: 4 x 4 (QFN | 32)