BQ24179 Series
Integrated, NVDC, 5-A 1-cell to 4-cell switch-mode buck-boost battery charger
Manufacturer: Texas Instruments
Link to Manufacturer Page: https://www.ti.com/
Catalog
Integrated, NVDC, 5-A 1-cell to 4-cell switch-mode buck-boost battery charger
| Part | Charge Current - Max [Max] | Fault Protection | Mounting Type | Interface | Operating Temperature [Max] | Operating Temperature [Min] | Supplier Device Package | Battery Chemistry | Number of Cells [Max] [custom] | Number of Cells [Min] [custom] | Programmable Features | Package / Case | Voltage - Supply (Max) [Max] | Current - Charging | Battery Pack Voltage |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Texas Instruments BQ24179YBGR | 5 A | Over Current, Over Temperature, Over Voltage, Short Circuit | Surface Mount | I2C | 85 °C | -40 °C | 56-DSBGA (2.9x3.3) | Lithium Ion/Polymer | 4 | 1 | Current, Voltage | 56-XFBGA, DSBGA | 24 V | Constant - Programmable | 3.4 V |
Key Features
• High power density, high integration buck-boost charger for 1- to 4-cell batteries supporting any USB PD 3.0 profileIntegrates four switching MOSFETs, BATFETIntegrates input and charging current sensingHighly efficient750-kHz or 1.5-MHz switching frequenciesEfficiency optimized for charging 2s battery, 96.5% efficiency with 9-V input and 94.5% efficiency with 15-V input at 3-A ICHG5-A charging current with 10-mA resolution96.5% efficiency: 16-V battery at 3 A from 20 VSupports a wide range of input sources3.6-V to 24-V wide input operating voltage range with 30-V absolute maximum ratingMaximum power tracking with input voltage dynamic power management (VINDPM) up to 22 V and input current dynamic power management (IINDPM) up to 3.3 ADetects USB BC1.2, SDP, CDP, DCP, HVDCP and non-standard adaptersDual-input power mux controller (optional) for source selectionNarrow voltage DC (NVDC) power path managementFlexible autonomous and I2C mode for optimal system performanceIntegrated 16-bit ADC for voltage, current, and temperature monitoringLow battery quiescent currentTypical 30-µA for battery only operationHigh accuracy±1% charge voltage regulation for 2s batteries±10% charge current regulation±5% input current regulationSafetyThermal regulation and thermal shutdownInput/battery OVP and OCPConverter MOSFETs OCPCharging safety timerPackage56-Pin 2.9 mm × 3.3 mm WCSPHigh power density, high integration buck-boost charger for 1- to 4-cell batteries supporting any USB PD 3.0 profileIntegrates four switching MOSFETs, BATFETIntegrates input and charging current sensingHighly efficient750-kHz or 1.5-MHz switching frequenciesEfficiency optimized for charging 2s battery, 96.5% efficiency with 9-V input and 94.5% efficiency with 15-V input at 3-A ICHG5-A charging current with 10-mA resolution96.5% efficiency: 16-V battery at 3 A from 20 VSupports a wide range of input sources3.6-V to 24-V wide input operating voltage range with 30-V absolute maximum ratingMaximum power tracking with input voltage dynamic power management (VINDPM) up to 22 V and input current dynamic power management (IINDPM) up to 3.3 ADetects USB BC1.2, SDP, CDP, DCP, HVDCP and non-standard adaptersDual-input power mux controller (optional) for source selectionNarrow voltage DC (NVDC) power path managementFlexible autonomous and I2C mode for optimal system performanceIntegrated 16-bit ADC for voltage, current, and temperature monitoringLow battery quiescent currentTypical 30-µA for battery only operationHigh accuracy±1% charge voltage regulation for 2s batteries±10% charge current regulation±5% input current regulationSafetyThermal regulation and thermal shutdownInput/battery OVP and OCPConverter MOSFETs OCPCharging safety timerPackage56-Pin 2.9 mm × 3.3 mm WCSP
Description
AI
The BQ24179 is a fully integrated switch-mode buck-boost charger for 1- to 4-cell Li-ion batteries and Li-polymer batteries. The integration includes 4 switching MOSFETs (Q1, Q2, Q3, Q4), input and charging current sensing circuits, the battery FET (QBAT) and all the loop compensation of the buck-boost converter.
It uses narrow VDC power path management, regulating the system slightly above the battery voltage without dropping below a configurable minimum system voltage. When system power exceeds the input source rating, battery supplement mode supports the system without overloading the input source.
The charger supports the NVDC power path management, in which the system is regulated at a voltage slightly higher than the battery voltage, but not drop below the minimum system voltage. The system keeps operating even when the battery is completely discharged or removed. When load power exceeds input source rating, the battery gets into supplement mode and prevents the input source from being overloaded and the system from crashing.
The device charges a battery from a wide range of the input sources including legacy USB adapter to high voltage USB PD adapter and traditional barrel adapter. The charger automatically sets converter to be buck, boost or buck-boost configurations based on input voltage and battery voltage without the host control. The dual input source selector manages the power flowing from two different input sources. The inputs selection is controlled by the host through I2C with default source #1 (VAC1) as the primary input and the source #2 (VAC2) as the secondary input.
To support fast charging using an adjustable high voltage adapter, the device provides D+/D- handshake. The device is compliant with USB 2.0 and USB 3.0 power delivery specification with input current and voltage regulation. In addition, the input current optimizer (ICO) allows the detection of maximum power point of an unknown input source.
Besides the I2C host controlled charging mode, this charger also supports autonomous charging mode. After power up, the charging is enabled with default register settings. The device can complete a charging cycle without any software engagements. It detects battery voltage and charges the battery in different phases: trickle charging, pre-charging, constant current (CC) charging and constant voltage (CV) charging. At the end of the charging cycle, the charger automatically terminates when the charge current is below a pre-set limit (termination current) in the constant voltage phase. When the full battery falls below the recharge threshold, the charger will automatically start another charging cycle.
The charger provides various safety features for battery charging and system operations, including battery temperature negative thermistor monitoring, trickle charge, pre-charge and fast charge timers and over-voltage/over-current protections on battery and input. The thermal regulation reduces charge current when the junction temperature exceeds a programmable threshold. The STAT output of the device reports the charging status and any fault conditions. ThePGoutput indicates if a good power source is present. TheINTpin immediately notifies host when fault occurs.
The device also provides a 16-bit analog-to-digital converter (ADC) for monitoring charge current and input/battery/system (VAC, VBUS, BAT, SYS, TS) voltages.
It is available in a 56-pin 2.9 mm × 3.3 mm WCSP package.
The BQ24179 is a fully integrated switch-mode buck-boost charger for 1- to 4-cell Li-ion batteries and Li-polymer batteries. The integration includes 4 switching MOSFETs (Q1, Q2, Q3, Q4), input and charging current sensing circuits, the battery FET (QBAT) and all the loop compensation of the buck-boost converter.
It uses narrow VDC power path management, regulating the system slightly above the battery voltage without dropping below a configurable minimum system voltage. When system power exceeds the input source rating, battery supplement mode supports the system without overloading the input source.
The charger supports the NVDC power path management, in which the system is regulated at a voltage slightly higher than the battery voltage, but not drop below the minimum system voltage. The system keeps operating even when the battery is completely discharged or removed. When load power exceeds input source rating, the battery gets into supplement mode and prevents the input source from being overloaded and the system from crashing.
The device charges a battery from a wide range of the input sources including legacy USB adapter to high voltage USB PD adapter and traditional barrel adapter. The charger automatically sets converter to be buck, boost or buck-boost configurations based on input voltage and battery voltage without the host control. The dual input source selector manages the power flowing from two different input sources. The inputs selection is controlled by the host through I2C with default source #1 (VAC1) as the primary input and the source #2 (VAC2) as the secondary input.
To support fast charging using an adjustable high voltage adapter, the device provides D+/D- handshake. The device is compliant with USB 2.0 and USB 3.0 power delivery specification with input current and voltage regulation. In addition, the input current optimizer (ICO) allows the detection of maximum power point of an unknown input source.
Besides the I2C host controlled charging mode, this charger also supports autonomous charging mode. After power up, the charging is enabled with default register settings. The device can complete a charging cycle without any software engagements. It detects battery voltage and charges the battery in different phases: trickle charging, pre-charging, constant current (CC) charging and constant voltage (CV) charging. At the end of the charging cycle, the charger automatically terminates when the charge current is below a pre-set limit (termination current) in the constant voltage phase. When the full battery falls below the recharge threshold, the charger will automatically start another charging cycle.
The charger provides various safety features for battery charging and system operations, including battery temperature negative thermistor monitoring, trickle charge, pre-charge and fast charge timers and over-voltage/over-current protections on battery and input. The thermal regulation reduces charge current when the junction temperature exceeds a programmable threshold. The STAT output of the device reports the charging status and any fault conditions. ThePGoutput indicates if a good power source is present. TheINTpin immediately notifies host when fault occurs.
The device also provides a 16-bit analog-to-digital converter (ADC) for monitoring charge current and input/battery/system (VAC, VBUS, BAT, SYS, TS) voltages.
It is available in a 56-pin 2.9 mm × 3.3 mm WCSP package.