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BQ24725RGRR
2-4 Cell Li+ Battery SMBus Charge Controller with N-Channel Power MOSFET Selector 20-VQFN -40 to 85
7 8 9 10 19 18 17 16ACN
ACP
CMSRC
ACDRV
ACOK
ACDET ILIM
BATDRV
SRN
SRP
GND
LODRV
REGN
BTST
HIDR
PHASEVCC
bq24725
Not Recommended for New Designs
2-4 Cell Li+ Battery SMBus Charge Controller with MOSFET Selector
and Advanced Circuit Protection
Checkfor Samples: bq24725
1FEATURES
DESCRIPTION SMBus Host-Controlled NMOS-NMOS The bq24725 is a high-efficiency, synchronous
Synchronous Buck Converter with battery charger, offering low component count for
Programmable 615kHz, 750kHz, and 885kHz space-constraint, multi-chemistry battery charging
Switching Frequencies applications.
• Automatic N-channel MOSFET Selectionof The bq24725 uses two charge pumpsto
System Power Source from Adapteror Battery drive n-channel MOSFETs (ACFET, RBFET and
Drivenby Internal Charge Pumps BATFET) for automatic system power source
• Enhanced Safety Features for Over Voltage selection.
Protection, Over Current Protection, Battery, SMBus controlled input current, charge current, and
Inductor and MOSFET Short Circuit Protection charge voltage DACs allow for high regulation
• Programmable Input Current, Charge Voltage, accuracies that can be programmed by the system
Charge Current Limits power management micro-controller.
±0.5% Charge Voltage Accuracy upto 19.2V The bq24725 uses internal input current registeror
– ±3% Charge Current Accuracy upto 8.128A external ILIM pinto throttle down PWM modulationto
reduce the charge current.
– ±3% Input Current Accuracy upto 8.064A ±2% 20x Adapter Currentor Charge Current The bq24725 charges two, threeor four series Li+
Amplifier Output Accuracy cells, andis availableina 20-pin, 3.5x 3.52 QFN
package.
• Programmable Battery Depletion Threshold,
and Battery LERAN Function Programmable Adapter Detection and
Indicator Integrated Soft Start Integrated Loop Compensation Real Time System Control on ILIM pinto Limit
Charge Current Range 9V-24V Current2 QFN Personal Digital
