BQ24765 Series
SMBus 2-4 cell Buck battery charge controller with integrated FETs
Manufacturer: Texas Instruments
Link to Manufacturer Page: https://www.ti.com/
Catalog
SMBus 2-4 cell Buck battery charge controller with integrated FETs
| Part | Battery Pack Voltage | Battery Chemistry | Current - Charging | Voltage - Supply (Max) [Max] | Mounting Type | Charge Current - Max [Max] | Interface | Supplier Device Package | Number of Cells [Max] [custom] | Number of Cells [Min] [custom] | Operating Temperature [Max] | Operating Temperature [Min] | Package / Case | Fault Protection |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Texas Instruments BQ24765RUVT | 19.2 V | Multi-Chemistry | Constant - Programmable | 24 V | Surface Mount | 8.064 A | I2C | 34-VQFN (7x3.5) | 4 | 2 | 125 ¯C | -40 °C | 34-VFQFN Exposed Pad | Over Current, Over Temperature |
Texas Instruments BQ24765RUVR | 19.2 V | Multi-Chemistry | Constant - Programmable | 24 V | Surface Mount | 8.064 A | I2C | 34-VQFN (7x3.5) | 4 | 2 | 125 ¯C | -40 °C | 34-VFQFN Exposed Pad | Over Current, Over Temperature |
Key Features
• Integrated Power MOSFETs, NMOS-NMOS,Synchronous Buck Converter>95% EfficiencyFrequency 700kHz Allows Smaller Inductor (5 mm× 5 mm)Thermal Regulation Loop for Safety, Limit TJ=120°CAdaptive Driver Dead-time and 99.5% MaximumEffective Duty CycleHigh-Accuracy Voltage and Current Regulation±0.5% Charge Voltage Accuracy±3% Charge Current Accuracy±3% Adapter Current Accuracy±2% Input Current Sense Amp AccuracyIntegrationIntegrated Power MOSFETsInput Current ComparatorInternal Soft-StartSafetyThermal Regulation Loop and ThermalShutdownDynamic Power Management (DPM)Power FETs Over Current Protection7 V–24 V AC/DC-Adapter Operating RangeSimplified SMBus ControlCharge Voltage DAC (1.024 V–19.2 V)Charge Current DAC (128 mA–8.064 A)Adapter Current Limit DPM DAC (256mA–11.008 A)Status and Monitoring OutputsAC/DC Adapter Present With AdjustableVoltage ThresholdInput Current Comparator, With AdjustableThreshold and HysteresisCurrent Sense Amplifier for Current DrawnFrom Input SourceCharge Any Battery Chemistry: Li+, LiFePO4,NiCd, NiMH, Lead Acid (2, 3, and 4 Li-Ion Cells)Charge Enable Pin (CE)Energy Star Low Iq< 10-µA Battery Current with AdapterRemoved< 1 mA Input DCINA Current When AdapterPresent and Charge Disabled34-pin, 3.50 mm × 7.00 mm QFN PackageAPPLICATIONSNotebook and Ultra-Mobile ComputersPortable Data-Capture TerminalsPortable PrintersMedical Diagnostics EquipmentBattery Bay ChargersBattery Back-up SystemsAll other trademarks are the property of their respective ownersIntegrated Power MOSFETs, NMOS-NMOS,Synchronous Buck Converter>95% EfficiencyFrequency 700kHz Allows Smaller Inductor (5 mm× 5 mm)Thermal Regulation Loop for Safety, Limit TJ=120°CAdaptive Driver Dead-time and 99.5% MaximumEffective Duty CycleHigh-Accuracy Voltage and Current Regulation±0.5% Charge Voltage Accuracy±3% Charge Current Accuracy±3% Adapter Current Accuracy±2% Input Current Sense Amp AccuracyIntegrationIntegrated Power MOSFETsInput Current ComparatorInternal Soft-StartSafetyThermal Regulation Loop and ThermalShutdownDynamic Power Management (DPM)Power FETs Over Current Protection7 V–24 V AC/DC-Adapter Operating RangeSimplified SMBus ControlCharge Voltage DAC (1.024 V–19.2 V)Charge Current DAC (128 mA–8.064 A)Adapter Current Limit DPM DAC (256mA–11.008 A)Status and Monitoring OutputsAC/DC Adapter Present With AdjustableVoltage ThresholdInput Current Comparator, With AdjustableThreshold and HysteresisCurrent Sense Amplifier for Current DrawnFrom Input SourceCharge Any Battery Chemistry: Li+, LiFePO4,NiCd, NiMH, Lead Acid (2, 3, and 4 Li-Ion Cells)Charge Enable Pin (CE)Energy Star Low Iq< 10-µA Battery Current with AdapterRemoved< 1 mA Input DCINA Current When AdapterPresent and Charge Disabled34-pin, 3.50 mm × 7.00 mm QFN PackageAPPLICATIONSNotebook and Ultra-Mobile ComputersPortable Data-Capture TerminalsPortable PrintersMedical Diagnostics EquipmentBattery Bay ChargersBattery Back-up SystemsAll other trademarks are the property of their respective owners
Description
AI
The bq24765 is a high-efficiency, synchronous battery charger with two integrated 30-mΩ NMOS power MOSFETs, and an integrated input current comparator, offering low component count for space-constraint, multi-chemistry battery charging applications. 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 using SMBus. The bq24765 has switching frequency of 700 kHz. The bq24765 charges 2, 3, or 4 series Li+ cells, and is available in a 34-pin, 3.50 mm × 7.00 mm VQFN package.
The bq24765 features Dynamic Power Management (DPM) and input power limiting. These features reduce battery charge current when the input power limit is reached to avoid overloading the AC adaptor when supplying the load and the battery charger simultaneously. A high-accuracy current sense amplifier enables accurate measurement of input current from the AC adapter, allowing monitoring the overall system power. If the adapter current is above the programmed low-power threshold, a signal is sent to host so that the system optimizes its power performance according to what is available from the adapter. An integrated comparator allows monitoring the input current through the current sense amplifier, and indicating when the input current exceeds a programmable threshold limit. The bq24765 features a thermal regulation loop to reduce battery charge current when the Tjlimit is reached. This feature protects internal power FETs from overheating when charging with high current.
The bq24765 is a high-efficiency, synchronous battery charger with two integrated 30-mΩ NMOS power MOSFETs, and an integrated input current comparator, offering low component count for space-constraint, multi-chemistry battery charging applications. 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 using SMBus. The bq24765 has switching frequency of 700 kHz. The bq24765 charges 2, 3, or 4 series Li+ cells, and is available in a 34-pin, 3.50 mm × 7.00 mm VQFN package.
The bq24765 features Dynamic Power Management (DPM) and input power limiting. These features reduce battery charge current when the input power limit is reached to avoid overloading the AC adaptor when supplying the load and the battery charger simultaneously. A high-accuracy current sense amplifier enables accurate measurement of input current from the AC adapter, allowing monitoring the overall system power. If the adapter current is above the programmed low-power threshold, a signal is sent to host so that the system optimizes its power performance according to what is available from the adapter. An integrated comparator allows monitoring the input current through the current sense amplifier, and indicating when the input current exceeds a programmable threshold limit. The bq24765 features a thermal regulation loop to reduce battery charge current when the Tjlimit is reached. This feature protects internal power FETs from overheating when charging with high current.