BQ25790 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 | Package / Case | Fault Protection | Battery Chemistry | Operating Temperature [Max] | Operating Temperature [Min] | Mounting Type | Current - Charging | Interface | Number of Cells [Max] [custom] | Number of Cells [Min] [custom] | Charge Current - Max [Max] | Battery Pack Voltage [Max] | Supplier Device Package | Supplier Device Package [x] | Supplier Device Package [y] | Voltage - Supply (Max) [Max] | Programmable Features |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Texas Instruments BQ25790YBGR | 56-XFBGA, DSBGA | Over Current, Over Temperature, Over Voltage, Reverse Battery, Short Circuit | Lithium Ion/Polymer | 85 °C | -40 °C | Surface Mount | Constant | I2C | 4 | 1 | 5 A | 18.8 V | 56-DSBGA | 2.9 | 3.32 | 24 V | Current, Timer, Voltage |
Key Features
• High efficient synchronous Switch Mode buck-boost charger for 1-4 cell battery750-kHz and 1.5-MHz Programmable 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 ICHGCharging current up to 5 A with 10-mA resolutionSupport wide range of input sources3.6-V to 24-V Wide input operating voltage range with 30-V absolute maximum ratingMaximum power tracking with VINDPM up to 22 V and IINDPM up to 3.3 ADetect USB BC1.2, SDP, CDP, DCP, HVDCP and non-standard adaptersDual-input power mux controller for source selectionHigh level integrationFour switching MOSFETs and BATFETInput current and charging current sensingNarrow-VDC (NVDC) Power Path managementPower USB port from battery (USB OTG)2.8-V to 22-V OTG output voltage with 10-mV resolution to support USB-PD PPSOTG Output current regulation up to 3.32 A with 40-mA resolutionFlexible autonomous and I2C mode for optimal system performanceIntegrated 16-bit ADC for voltage, current and temperature monitorLow battery quiescent currentTypical 21-µA at battery only operationTypical 600 nA in Charger Shutdown ModeHigh accuracy±0.5% Charge voltage regulation for 2s battery±5% Charge current regulation±5% Input current regulationSafetyThermal regulation and thermal shutdownInput/battery OVP and OCPConverter MOSFETs OCPCharging safety timerPackage56-Pin 2.9mm × 3.3mm WCSPHigh efficient synchronous Switch Mode buck-boost charger for 1-4 cell battery750-kHz and 1.5-MHz Programmable 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 ICHGCharging current up to 5 A with 10-mA resolutionSupport wide range of input sources3.6-V to 24-V Wide input operating voltage range with 30-V absolute maximum ratingMaximum power tracking with VINDPM up to 22 V and IINDPM up to 3.3 ADetect USB BC1.2, SDP, CDP, DCP, HVDCP and non-standard adaptersDual-input power mux controller for source selectionHigh level integrationFour switching MOSFETs and BATFETInput current and charging current sensingNarrow-VDC (NVDC) Power Path managementPower USB port from battery (USB OTG)2.8-V to 22-V OTG output voltage with 10-mV resolution to support USB-PD PPSOTG Output current regulation up to 3.32 A with 40-mA resolutionFlexible autonomous and I2C mode for optimal system performanceIntegrated 16-bit ADC for voltage, current and temperature monitorLow battery quiescent currentTypical 21-µA at battery only operationTypical 600 nA in Charger Shutdown ModeHigh accuracy±0.5% Charge voltage regulation for 2s battery±5% Charge current regulation±5% Input current regulationSafetyThermal regulation and thermal shutdownInput/battery OVP and OCPConverter MOSFETs OCPCharging safety timerPackage56-Pin 2.9mm × 3.3mm WCSP
Description
AI
The BQ25790 is a fully integrated switch-mode buck-boost charger for 1-4 cell Li-ion battery and Li-polymer battery. 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 provides high power density and design flexibility to charge batteries across the full input voltage range for USB Type-C™ and USB power delivery (USB-PD) applications such as smart phone, tablet and other portable devices.
The charger supports the narrow VDC 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 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.
In the absence of input sources, this device supports USB On-the-Go (OTG) function, discharging battery to generate an adjustable 2.8V~22V voltage on VBUS with 10mV step size, which is compliant to the USB PD 3.0 specification defined programmable power supply (PPS) feature.
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 2.9mm × 3.3mm WCSP package.
The BQ25790 is a fully integrated switch-mode buck-boost charger for 1-4 cell Li-ion battery and Li-polymer battery. 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 provides high power density and design flexibility to charge batteries across the full input voltage range for USB Type-C™ and USB power delivery (USB-PD) applications such as smart phone, tablet and other portable devices.
The charger supports the narrow VDC 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 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.
In the absence of input sources, this device supports USB On-the-Go (OTG) function, discharging battery to generate an adjustable 2.8V~22V voltage on VBUS with 10mV step size, which is compliant to the USB PD 3.0 specification defined programmable power supply (PPS) feature.
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 2.9mm × 3.3mm WCSP package.