BQ24780S_15 Datasheet, PDF (1/11 Pages) Texas Instruments – bq24780S 1- to 4-Cell Hybrid Power Boost Mode Battery Charge Controller With Power and Processor Hot Monitoring

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bq24780S
SLUSC93A – APRIL 2015 – REVISED APRIL 2015
bq24780S 1- to 4-Cell Hybrid Power Boost Mode Battery Charge Controller
With Power and Processor Hot Monitoring
1 Features
•1 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
2 Applications
• Notebook, Ultrabook, Detachable, and Tablet PC
• Handheld Terminal
• Industrial and Medical Equipment
• Portable Equipment
3 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.
Device Information⁽¹⁾
PART NUMBER
PACKAGE
bq24780S
WQFN (28)
BODY SIZE (NOM)
4.00 × 4.00 mm²
(1) For all available packages, see the orderable addendum at
the end of the datasheet.
Adapter
4.5-24V
N-FET Driver
R_{AC Enhanced Safety:}
OCP, OVP, FET Short
Adapter Detection
bq24780S
SMBus Controls V & I
with high accuracy
SMBus
Hybrid Power
Boost Charge
Controller
SYS
N-FET Driver
Battery
Pack
R_SR
1S-4S
HOST
IADP, PROCHOT,
PMON, IDCHG
Integration:
Loop Compensation; Soft-Start
Comparator, BTST Diode
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.