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BQ24707RGRR

SMBus 1-4 cell Buck battery charge controller with independent comparator and circuit protection

Manufacturer:

Texas Instruments, Inc
Mfr.Part #:

BQ24707RGRR
Datasheet:

BQ24707RGRR Datasheet (PDF)
Battery Chemistry:

Lithium Ion
Number of Cells:

1 ~ 4
Current - Charging:

Constant - Programmable
Fault Protection:

Over Current, Over Voltage, Short Circuit
EDA/CAD Models:

Request Free CAD Models for BQ24707RGRR

Email: [email protected]

Skype: live:.cid.ab6b29428937b76

Tel: +852 95804164

BQ24707RGRR General Description

The bq24707 and bq24707A devices are high-efficiency, synchronous battery chargers, offering low component count for space-constrained, multi-chemistry battery charging applications.

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

The IC uses the internal input current register or external ILIM pin to throttle down PWM modulation to reduce the charge current.

The IC provides an IFAULT output to alarm if any MOSFET fault or input over current occurs. This alarm output allows users to turn off input power selectors when the fault occurs. Meanwhile, an independent comparator with internal reference is available to monitor input current, output current, or output voltage.

The IC charges one-, two-, three-, or four-series Li+ cells, and is available in a 20-pin, 3.5 × 3.5 mm QFN package.

Key Features

SMBus Host-Controlled NMOS-NMOS
Synchronous Buck Converter With Programmable
615 kHz, 750 kHz, and 885 kHz Switching
Frequency
Real-Time System Control on ILIM Pin to Limit
Charge Current
Enhanced Safety Features for Overvoltage
Protection, Overcurrent Protection, Battery,
Inductor, and MOSFET Short-Circuit Protection
Programmable Input Current, Charge Voltage,
Charge Current Limits
- ±0.5% Charge Voltage Accuracy up to 19.2 V
- ±3% Charge Current Accuracy up to 8.128 A
- ±3% Input Current Accuracy up to 8.064 A
- ±2% 20× Adapter Current or Charge Current
  Output Accuracy
Programmable Adapter Detection and Indicator
Independent Comparator With Internal Reference
Integrated Soft-Start
Integrated Loop Compensation
AC Adapter Operating Range 5 V to 24 V
15-µA Off-State Battery Discharge Current
20-pin 3.5 mm × 3.5 mm QFN Package
bq24707: ACOK Delay Default 1.3 s
bq24707A: ACOK Delay Default 1.2 ms
APPLICATIONS
- Portable Notebook Computers, UMPCs, Ultra-Thin
  Notebooks, and Netbooks
- Personal Digital Assistants
- Handheld Terminals
- Industrial and Medical Equipment
- Portable Equipment

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Specifications

Category	Integrated Circuits (ICs)Power Management (PMIC)Battery Chargers	Series	-
Battery Chemistry	Lithium Ion	Number of Cells	1 ~ 4
Current - Charging	Constant - Programmable	Programmable Features	-
Fault Protection	Over Current, Over Voltage, Short Circuit	Charge Current - Max	-
Battery Pack Voltage	19.2V (Max)	Voltage - Supply (Max)	24V
Interface	I²C	Operating Temperature	0°C ~ 125°C (TJ)
Mounting Type	Surface Mount	Base Product Number	BQ24707