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

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 Compare all products in Battery Charger IC

 
Number of Series Cells
Function
Cell Chemistry
Battery Charge Voltage (Min) (V)
Battery Charge Voltage (Max) (V)
Features
Charge Current (Max) (A)
Control Interface
Control Topology
Rating
Operating Temperature Range (C)
Pin/Package
Operating Vin (Min) (V)
Operating Vin (Max) (V)
Absolute Vin (safety rating) (Max) ((V))
BQ24780S BQ25700A BQ25703A
1
2
3
4   
1
2
3
4   
1
2
3
4   
Charger    Charger    Charger   
Lead Acid
Li-Ion/Li-Polymer
LiFePO4
NiCd
NiMH   
Lead Acid
Li-Ion/Li-Polymer
LiFePO4
Lithium phosphate
NiCd
NiMH
SuperCap   
Lead Acid
Li-Ion/Li-Polymer
LiFePO4
Lithium phosphate
NiCd
NiMH
SuperCap   
1.024    1.024    1.024   
19.2    19.2    19.2   
1-4 Cells
Over Voltage Protection
Power Path
Thermal Regulation
Under Voltage Protection
Vin DPM (OK for Solar Power Source)   
1-4 Cells
Integrated ADC
USB OTG
Over Voltage Protection
Power Path
Solar Input
Standard BAT Temp Monitoring
Thermal Regulation
Under Voltage Protection
Vin DPM (OK for Solar Power Source)   
1-4 Cells
Integrated ADC
USB OTG
Over Voltage Protection
Power Path
Solar Input
Standard BAT Temp Monitoring
Thermal Regulation
Under Voltage Protection
Vin DPM (OK for Solar Power Source)   
8.128    8.128    8.128   
SMBus    SMBus    I2C   
Switch-Mode Buck    Switch-Mode Buck-boost    Switch-Mode Buck-boost   
Catalog    Catalog    Catalog   
-40 to 85    -40 to 85    -40 to 85   
28WQFN    32QFN    32QFN   
4.5    3.5    3.5   
24    24    24   
30    30    30