BQ24704 Series
Host-Controlled Multi-Chemistry Battery Charger with Low Input Power Detect and low Iq
Manufacturer: Texas Instruments
Link to Manufacturer Page: https://www.ti.com/
Catalog
Host-Controlled Multi-Chemistry Battery Charger with Low Input Power Detect and low Iq
| Part | Current - Charging | Voltage - Supply (Max) [Max] | Package / Case | Battery Chemistry | Fault Protection | Operating Temperature [Max] | Operating Temperature [Min] | Number of Cells [Max] [custom] | Number of Cells [Min] [custom] | Supplier Device Package | Charge Current - Max [Max] | Mounting Type | Battery Pack Voltage [Max] | Utilized IC / Part | Type | Function | Supplied Contents |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Texas Instruments BQ24704RGER | Constant - Programmable | 24 V | 24-VFQFN Exposed Pad | Lithium Ion/Polymer | Over Current, Over Temperature, Over Voltage | 125 ¯C | -40 °C | 4 | 2 | 24-VQFN (4x4) | 8 A | Surface Mount | 18 V | ||||
Texas Instruments BQ24704EVM | BQ24705 | Power Management | Battery Charger | Board(s) | |||||||||||||
Texas Instruments BQ24704RGET | Constant - Programmable | 24 V | 24-VFQFN Exposed Pad | Lithium Ion/Polymer | Over Current, Over Temperature, Over Voltage | 125 ¯C | -40 °C | 4 | 2 | 24-VQFN (4x4) | 8 A | Surface Mount | 18 V |
Key Features
• NMOS-NMOS Synchronous Buck Converter with 300 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 AccuracyIntegrationInternal Loop CompensationInternal Soft-StartSafetyDynamic Power Management (DPM) with Status IndicatorCharger Overcurrent ProtectionBattery Overvoltage ProtectionThermal ShutdownSupports Two, Three, or Four Li+ Cells8 — 24 V AC/DC-Adapter Operating RangeAnalog Inputs with Ratiometric Programming via Resistors or DAC/GPIO Host ControlCharge Voltage (4-4.512 V/cell)Charge Current (up to 8 A, with 10-mSense Resistor)Adapter Current Limit (DPM)Status and Monitoring OutputsAC/DC Adapter Present with Programmable Voltage ThresholdDPM Loop Active (DPMDET)Current Drawn from Input SourceCharge Enable24-pin, 4x4-mm QFN PackageEnergy Star Low Iq< 10 µA Off-state Discharge Current< 1.5 mA Off-state Input Quiescent CurrentAPPLICATIONSNotebook and Netbook ComputersPortable Data-Capture TerminalsPortable PrintersMedical Diagnostics EquipmentBattery Bay ChargersBattery Back-Up SystemsPowerPad is a trademark of Texas Instruments.NMOS-NMOS Synchronous Buck Converter with 300 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 AccuracyIntegrationInternal Loop CompensationInternal Soft-StartSafetyDynamic Power Management (DPM) with Status IndicatorCharger Overcurrent ProtectionBattery Overvoltage ProtectionThermal ShutdownSupports Two, Three, or Four Li+ Cells8 — 24 V AC/DC-Adapter Operating RangeAnalog Inputs with Ratiometric Programming via Resistors or DAC/GPIO Host ControlCharge Voltage (4-4.512 V/cell)Charge Current (up to 8 A, with 10-mSense Resistor)Adapter Current Limit (DPM)Status and Monitoring OutputsAC/DC Adapter Present with Programmable Voltage ThresholdDPM Loop Active (DPMDET)Current Drawn from Input SourceCharge Enable24-pin, 4x4-mm QFN PackageEnergy Star Low Iq< 10 µA Off-state Discharge Current< 1.5 mA Off-state Input Quiescent CurrentAPPLICATIONSNotebook and Netbook ComputersPortable Data-Capture TerminalsPortable PrintersMedical Diagnostics EquipmentBattery Bay ChargersBattery Back-Up SystemsPowerPad is a trademark of Texas Instruments.
Description
AI
The bq24704 is a high-efficiency, synchronous battery charger with integrated compensation offering low component count for space-limited Li-Ion and Li-Polymer battery charging applications. Charge current and voltage programming allows high regulation accuracies, and can be either hardwired with resistors, or programmed by the system power-management microcontroller using a DAC or GPIOs.
The bq24704 charges two, three, or four series Li+ cells, supporting up to 8 A of charge current, and is available in a 24-pin, 4x4-mm thin QFN package.
The bq24704 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 bq24704 is a high-efficiency, synchronous battery charger with integrated compensation offering low component count for space-limited Li-Ion and Li-Polymer battery charging applications. Charge current and voltage programming allows high regulation accuracies, and can be either hardwired with resistors, or programmed by the system power-management microcontroller using a DAC or GPIOs.
The bq24704 charges two, three, or four series Li+ cells, supporting up to 8 A of charge current, and is available in a 24-pin, 4x4-mm thin QFN package.
The bq24704 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.