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BQ24780S Datasheet(PDF) 1 Page - Texas Instruments

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Part No. BQ24780S
Description  bq24780S 1- to 4-Cell Hybrid Power Boost Mode Battery Charge Controller With Power and Processor Hot Monitoring
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Maker  TI [Texas Instruments]
Homepage  http://www.ti.com
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BQ24780S Datasheet(HTML) 1 Page - Texas Instruments

 
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R
SR
Adapter
4.5-24V
HOST
bq24780S
Hybrid Power
Boost Charge
Controller
SYS
Battery
Pack
N-FET Driver
N-FET Driver
1S-4S
SMBus
IADP,
,
PROCHOT
PMON, IDCHG
SMBus Controls V & I
with high accuracy
Adapter Detection
Enhanced Safety:
OCP, OVP, FET Short
Integration:
Loop Compensation; Soft-Start
Comparator, BTST Diode
R
AC
Product
Folder
Sample &
Buy
Technical
Documents
Tools &
Software
Support &
Community
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
2 Applications
1
Industrial Innovative Charge Controller With
Notebook, Ultrabook, Detachable, and Tablet PC
Hybrid Power Boost Mode
Handheld Terminal
Adapter and Battery Provides Power to
Industrial and Medical Equipment
System Together for Intel® CPU Turbo Mode
Portable Equipment
Ultra-Fast Transient Response of 150 µs to
Enter Boost Mode
3 Description
Hybrid Power Boost Mode from 4.5- to 24-V
The
bq24780S
device
is
a
high-efficiency,
synchronous battery charger, offering low component
System
count for space-constrained, multi-chemistry battery
Charge 1- to 4-Cell Battery Pack from 4.5- to
charging applications.
24-V Adapter
The bq24780S device supports hybrid power boost
High Accuracy Power and Current Monitoring for
mode (previously called "turbo boost mode"). It allows
CPU Throttling
battery discharge energy to system when system
Comprehensive PROCHOT Profile
power demand is temporarily higher than adapter
± 2% Current Monitor Accuracy
maximum power level. Therefore, adapter does not
crash.
± 5% System Power Monitor Accuracy
(PMON)
The bq24780S device uses two charge pumps to
separately
drive
N-channel
MOSFETs
(ACFET,
Automatic NMOS Power Source Selection from
RBFET, and BATFET) for automatic system power
Adapter or Battery
source selection.
ACFET Fast Turn on in 100 µs
Through
SMBus,
system
power
management
Programmable Input Current, Charge Voltage,
microcontroller
programs
input
current,
charge
Charge and Discharge Current Limit
current, discharge current, and charge voltage DACs
±0.4% Charge Voltage (16-mV step)
with high regulation accuracies.
±2% Input Current (128-mA/step)
The bq24780S device monitors adapter current
±2% Charge Current (64-mA/step)
(IADP), battery discharge current (IDCHG), and
system power (PMON) for host to throttle back CPU
±2% Discharge Current (512-mA/step)
speed or reduce system power when needed.
High Integration
The bq24780S device charges 1-, 2-, 3-, or 4-series
Battery LEARN Function
Li+ cells.
Battery Present Monitor
Boost Mode Indicator
Device Information(1)
Loop Compensation
PART NUMBER
PACKAGE
BODY SIZE (NOM)
BTST Diode
bq24780S
WQFN (28)
4.00 × 4.00 mm2
Enhanced Safety Features for Overvoltage
(1) For all available packages, see the orderable addendum at
the end of the datasheet.
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
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.


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