BQ24707A Series
1-4 cell Li-ion battery charge controller with independent comparator and advanced circuit prot.
Manufacturer: Texas Instruments
Link to Manufacturer Page: https://www.ti.com/
Catalog
1-4 cell Li-ion battery charge controller with independent comparator and advanced circuit prot.
| Part | Fault Protection | Current - Charging | Number of Cells [Max] [custom] | Number of Cells [Min] [custom] | Interface | Mounting Type | Battery Chemistry | Operating Temperature [Min] | Operating Temperature [Max] | Voltage - Supply (Max) [Max] | Package / Case | Battery Pack Voltage |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
Texas Instruments BQ24707ARGRR | Over Current, Over Voltage, Short Circuit | Constant - Programmable | 4 | 1 | I2C | Surface Mount | Lithium Ion | 0 °C | 125 ¯C | 24 V | 20-VFQFN Exposed Pad | 19.2 V |
Texas Instruments BQ24707ARGRT | Over Current, Over Voltage, Short Circuit | Constant - Programmable | 4 | 1 | I2C | Surface Mount | Lithium Ion | 0 °C | 125 ¯C | 24 V | 20-VFQFN Exposed Pad | 19.2 V |
Key Features
• SMBus Host-Controlled NMOS-NMOSSynchronous Buck Converter With Programmable615 kHz, 750 kHz, and 885 kHz SwitchingFrequencyReal-Time System Control on ILIM Pin to LimitCharge CurrentEnhanced Safety Features for OvervoltageProtection, Overcurrent Protection, Battery,Inductor, and MOSFET Short-Circuit ProtectionProgrammable 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 CurrentOutput AccuracyProgrammable Adapter Detection and IndicatorIndependent Comparator With Internal ReferenceIntegrated Soft-StartIntegrated Loop CompensationAC Adapter Operating Range 5 V to 24 V15-µA Off-State Battery Discharge Current20-pin 3.5 mm × 3.5 mmQFN Packagebq24707:ACOKDelay Default 1.3 sbq24707A:ACOKDelay Default 1.2 msAPPLICATIONSPortable Notebook Computers, UMPCs, Ultra-ThinNotebooks, and NetbooksPersonal Digital AssistantsHandheld TerminalsIndustrial and Medical EquipmentPortable EquipmentAll other trademarks are the property of their respective ownersSMBus Host-Controlled NMOS-NMOSSynchronous Buck Converter With Programmable615 kHz, 750 kHz, and 885 kHz SwitchingFrequencyReal-Time System Control on ILIM Pin to LimitCharge CurrentEnhanced Safety Features for OvervoltageProtection, Overcurrent Protection, Battery,Inductor, and MOSFET Short-Circuit ProtectionProgrammable 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 CurrentOutput AccuracyProgrammable Adapter Detection and IndicatorIndependent Comparator With Internal ReferenceIntegrated Soft-StartIntegrated Loop CompensationAC Adapter Operating Range 5 V to 24 V15-µA Off-State Battery Discharge Current20-pin 3.5 mm × 3.5 mmQFN Packagebq24707:ACOKDelay Default 1.3 sbq24707A:ACOKDelay Default 1.2 msAPPLICATIONSPortable Notebook Computers, UMPCs, Ultra-ThinNotebooks, and NetbooksPersonal Digital AssistantsHandheld TerminalsIndustrial and Medical EquipmentPortable EquipmentAll other trademarks are the property of their respective owners
Description
AI
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 anIFAULToutput 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 mmQFN package.
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 anIFAULToutput 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 mmQFN package.