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1-4 cell Li-ion battery SMBus charge controller with N-Channel power MOSFET selector

Inventory: 8,132

Download data sheet for BQ24725A
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Packaging information

Package | Pins VQFN (RGR) | 20
Operating temperature range (℃) I (-40 to 85)
Package qty | Carrier: 250 | SMALL T&R
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Quality information

RoHS Yes
Lead finish / Ball material NIPDAU
MSL rating / Peak reflow Level-2-260C-1 YEAR
Material content View
DPPM / MTBF / Fit rate View
Qualification summary View
Ongoing reliability monitoring View
Device marking View


  • SMBus Host-controlled NMOS-NMOS synchronous buck converter with programmable 615kHz, 750kHz, and 885kHz switching frequencies
  • Automatic N-channel MOSFET selection of system power source from adapter or battery driven by internal charge pumps
  • Enhanced safety features for over voltage protection, over current protection, battery, inductor and MOSFET short circuit protection
  • Programmable input current, charge voltage, charge current limits
    • ±0.5% Charge voltage accuracy up to 19.2V
    • ±3% Charge current accuracy up to 8.128A
    • ±3% Input currentaccuracy up to 8.064A
    • ±2% 20x Adapter current or charge current amplifieroutput accuracy
  • Programmable battery depletion threshold, and battery LEARN function
  • Programmable adapter detection and indicator
  • Integrated soft start
  • Integrated loop compensation
  • Real time system control on ILIM pin to limit charge current
  • AC Adapter operating range 4.5V-24V
  • 5µA Off-state battery discharge current
  • 0.65mA (0.8mA max) Adapter standby quiescent current
  • 20-pin 3.5 x 3.5 mm2 VQFN Package

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The BQ24725A is a high-efficiency, synchronous battery charger, offering low componentcount for space-constraint, multi-chemistry battery charging applications.

The BQ24725A utilizes two charge pumps to separately drive n-channel MOSFETs (ACFET,RBFET and BATFET) for automatic system power source selection.

SMBus controlled input current, charge current, and charge voltage DACs allow for veryhigh regulation accuracies that can be easily programmed by the system power managementmicro-controller.

The BQ24725A uses internal input current register or external ILIM pin to throttle downPWM modulation to reduce the charge current.

The BQ24725A charges one, two, three or four series Li+ cells.

Qty Price
1-99 $3.49
100-249 $3.06
250-999 $2.14
1,000+ $1.73

Alternative carriers

Part number BQ24725ARGRR
Package qty | Carrier 3,000 | LARGE T&R
Custom reel may be available
Inventory 19,423
Qty | Price (USD) 1ku | $1.50