BQ24753A Series
Host controlled 2-4 cell Buck battery charge controller with low Iq and system power selector
Manufacturer: Texas Instruments
Link to Manufacturer Page: https://www.ti.com/
Catalog
Host controlled 2-4 cell Buck battery charge controller with low Iq and system power selector
| Part | Fault Protection | Battery Chemistry | Voltage - Supply (Max) [Max] | Battery Pack Voltage | Current - Charging | Package / Case | Number of Cells [Max] [custom] | Number of Cells [Min] [custom] | Supplier Device Package | Mounting Type | Operating Temperature [Max] | Operating Temperature [Min] | Charge Current - Max [Max] |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Texas Instruments BQ24753ARHDT | Over Current, Over Voltage | Lithium Ion/Polymer | 24 V | 18.048 V | Constant - Programmable | 28-VFQFN Exposed Pad | 4 | 2 | 28-VQFN (5x5) | Surface Mount | 125 ¯C | -40 °C | 10 A |
Texas Instruments BQ24753ARHDR | Over Current, Over Voltage | Lithium Ion/Polymer | 24 V | 18.048 V | Constant - Programmable | 28-VFQFN Exposed Pad | 4 | 2 | 28-VQFN (5x5) | Surface Mount | 125 ¯C | -40 °C | 10 A |
Key Features
• NMOS-NMOS Synchronous Buck Converter with300 kHz Frequency and >95% Efficiency30-ns Minimum Driver Dead-time and 99.5%Maximum Effective 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 AccuracyIntegrationAutomatic System Power Selection FromAC/DC Adapter or BatteryInternal Loop CompensationInternal Soft StartSafetyProgrammable Input Overvoltage Protection (OVP)Fast Dynamic Power Management (DPM)Programmable Inrush Adapter Power (ACOP)and Overcurrent (ACOC) LimitsReverse-Conduction Protection Input FETSupports Two, Three, or Four Li+ Cells8 – 24 V AC/DC-Adapter Operating RangeAnalog Inputs with Ratiometric Programming viaResistors or DAC/GPIO Host ControlCharge Voltage (4-4.512 V/cell)Charge Current (up to 10 A, with 10-mΩ)Adapter Current Limit (DPM)Status and Monitoring OutputsAdapter Present with Programmable VoltageThresholdCurrent Drawn from Input SourceBattery Learn Cycle ControlCharge Enable28-pin, 5x5-mm VQFN packageEnergy Star Low Iq< 10 µA Off-State Battery Discharge Current< 1.5 mA Off-State Input Quiescent CurrentNMOS-NMOS Synchronous Buck Converter with300 kHz Frequency and >95% Efficiency30-ns Minimum Driver Dead-time and 99.5%Maximum Effective 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 AccuracyIntegrationAutomatic System Power Selection FromAC/DC Adapter or BatteryInternal Loop CompensationInternal Soft StartSafetyProgrammable Input Overvoltage Protection (OVP)Fast Dynamic Power Management (DPM)Programmable Inrush Adapter Power (ACOP)and Overcurrent (ACOC) LimitsReverse-Conduction Protection Input FETSupports Two, Three, or Four Li+ Cells8 – 24 V AC/DC-Adapter Operating RangeAnalog Inputs with Ratiometric Programming viaResistors or DAC/GPIO Host ControlCharge Voltage (4-4.512 V/cell)Charge Current (up to 10 A, with 10-mΩ)Adapter Current Limit (DPM)Status and Monitoring OutputsAdapter Present with Programmable VoltageThresholdCurrent Drawn from Input SourceBattery Learn Cycle ControlCharge Enable28-pin, 5x5-mm VQFN packageEnergy Star Low Iq< 10 µA Off-State Battery Discharge Current< 1.5 mA Off-State Input Quiescent Current
Description
AI
The bq24753A is a high-efficiency, synchronous battery charger with integrated compensation and system power selector logic, offering low component count for space-constrained Li-Ion and Li-Polymer battery charging applications. Ratiometric charge current and voltage programming allows for high regulation accuracies, and can be either hardwired with resistors or programmed by the system power-management microcontroller using a DAC or GPIOs.
The bq24753A charges two, three, or four series Li+ cells, supporting up to 10 A of charge current, and is available in a 28-pin, 5x5-mm thin VQFN package.
The bq24753A controls external switches to prevent battery discharge back to the input, connect the adapter to the system, and to connect the battery to the system using 6-V gate drives for better system efficiency. For maximum system safety, inrush-power limiting provides instantaneous response to high input voltage multiplied by current. This AC Overpower protection (ACOP) feature limits the input-switch power to the programmed level on the ACOP pin, and latches off if the high-power condition persists to prevent overheating.
The bq24753A 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 adapter when supplying the load and the battery charger simultaneously. A highly-accurate current-sense amplifier enables precise measurement of input current from the AC adapter to monitor the overall system power.
The bq24753A is a high-efficiency, synchronous battery charger with integrated compensation and system power selector logic, offering low component count for space-constrained Li-Ion and Li-Polymer battery charging applications. Ratiometric charge current and voltage programming allows for high regulation accuracies, and can be either hardwired with resistors or programmed by the system power-management microcontroller using a DAC or GPIOs.
The bq24753A charges two, three, or four series Li+ cells, supporting up to 10 A of charge current, and is available in a 28-pin, 5x5-mm thin VQFN package.
The bq24753A controls external switches to prevent battery discharge back to the input, connect the adapter to the system, and to connect the battery to the system using 6-V gate drives for better system efficiency. For maximum system safety, inrush-power limiting provides instantaneous response to high input voltage multiplied by current. This AC Overpower protection (ACOP) feature limits the input-switch power to the programmed level on the ACOP pin, and latches off if the high-power condition persists to prevent overheating.
The bq24753A 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 adapter when supplying the load and the battery charger simultaneously. A highly-accurate current-sense amplifier enables precise measurement of input current from the AC adapter to monitor the overall system power.