BQ24079QW-Q1 Series
Automotive Qualified Standalone 1-cell 1.5-A linear charger, Power Path and 4.1-V VBAT
Manufacturer: Texas Instruments
Link to Manufacturer Page: https://www.ti.com/
Catalog
Automotive Qualified Standalone 1-cell 1.5-A linear charger, Power Path and 4.1-V VBAT
| Part | Programmable Features | Operating Temperature [Min] | Operating Temperature [Max] | Number of Cells | Grade | Package / Case | Qualification | Supplier Device Package | Fault Protection | Battery Chemistry | Current - Charging | Mounting Type | Interface | Battery Pack Voltage | Charge Current - Max [Max] | Voltage - Supply (Max) [Max] |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Texas Instruments BQ24079QWRGTRQ1 | Current, Timer | -40 °C | 125 °C | 1 | Automotive | 16-VFQFN Exposed Pad | AEC-Q100 | 16-VQFN (3x3) | Over Temperature, Over Voltage, Reverse Current, Short Circuit | Lithium Ion/Polymer | Constant - Programmable | Surface Mount | USB | 4.1 V | 1.5 A | 26 V |
Texas Instruments BQ24079QWRGTTQ1 | Current, Timer | -40 °C | 125 °C | 1 | Automotive | 16-VFQFN Exposed Pad | AEC-Q100 | 16-VQFN (3x3) | Over Temperature, Over Voltage, Reverse Current, Short Circuit | Lithium Ion | Constant - Programmable | Surface Mount, Wettable Flank | USB | 4.1 V | 1.5 A | 26 V |
Key Features
• Qualified for Automotive ApplicationsAEC-Q100 Qualified with the Following Results:Device Temperature Grade 1: -40°C to +125°C Ambient Operating Temperature RangeDevice HBM ESD Classification Level 2Device CDM ESD Classification Level C4AFully Compliant USB ChargerSelectable 100-mA and 500-mA Maximum Input Current100-mA Maximum Current Limit Ensures Compliance to USB-IF StandardInput Based Dynamic Power Management (VIN-DPM) for Protection Against Poor USB Sources28-V Input Rating with Overvoltage Protection4.1-V Battery Regulation VoltageIntegrated Dynamic Power-Path Management (DPPM) Function Simultaneously and Independently Powers the System and Charges the BatterySupports up to 1.5-A Charge Current with Current Monitoring Output (ISET)Programmable Input Current Limit up to 1.5 A for Wall AdaptersBattery Disconnect Function with SYSOFF InputProgrammable Pre-Charge and Fast-Charge Safety TimersReverse Current, Short-Circuit, and Thermal ProtectionNTC Thermistor InputProprietary Start Up Sequence Limits Inrush CurrentStatus Indication – Charging/Done, Power GoodSmall 3 mm × 3 mm 16 Lead VQFN Package with Wettable FlankQualified for Automotive ApplicationsAEC-Q100 Qualified with the Following Results:Device Temperature Grade 1: -40°C to +125°C Ambient Operating Temperature RangeDevice HBM ESD Classification Level 2Device CDM ESD Classification Level C4AFully Compliant USB ChargerSelectable 100-mA and 500-mA Maximum Input Current100-mA Maximum Current Limit Ensures Compliance to USB-IF StandardInput Based Dynamic Power Management (VIN-DPM) for Protection Against Poor USB Sources28-V Input Rating with Overvoltage Protection4.1-V Battery Regulation VoltageIntegrated Dynamic Power-Path Management (DPPM) Function Simultaneously and Independently Powers the System and Charges the BatterySupports up to 1.5-A Charge Current with Current Monitoring Output (ISET)Programmable Input Current Limit up to 1.5 A for Wall AdaptersBattery Disconnect Function with SYSOFF InputProgrammable Pre-Charge and Fast-Charge Safety TimersReverse Current, Short-Circuit, and Thermal ProtectionNTC Thermistor InputProprietary Start Up Sequence Limits Inrush CurrentStatus Indication – Charging/Done, Power GoodSmall 3 mm × 3 mm 16 Lead VQFN Package with Wettable Flank
Description
AI
The bq24079QW-Q1 is an integrated Li-ion linear charger and system power-path management device targeted at space-constraint automotive applications such as telematics/eCall. The device can operate from 4.35 V to 6.4 V and support charge currents up to 1.5 A. The input voltage range with input overvoltage protection supports unregulated adapters. The USB input current limit accuracy and start up sequence allow the bq24079QW-Q1 to meet the USB-IF inrush current specification. Additionally, the input dynamic power management (VIN-DPM) prevents the system load from crashing incorrectly configured USB sources.
The bq24079QW-Q1 features dynamic power-path management (DPPM) that powers the system while simultaneously and independently charging the battery. The DPPM circuit reduces the charge current when the input current limit causes the system output to fall to the DPPM threshold; thus, supplying the system load at all times while monitoring the charge current separately. This feature along with the 4.1-V battery regulation voltage helps to extend battery life time by reducing the number of charge and discharge cycles on the battery, allowing for proper charge termination and enabling the system to run with a defective or absent battery pack.
Additionally, the regulated system input enables instant system turn-on when plugged in even with a totally discharged battery. The power-path management architecture also permits the battery to supplement the system current requirements when the adapter cannot deliver the peak system currents, enabling the use of a smaller adapter.
The battery is charged in three phases: conditioning, constant current, and constant voltage. In all charge phases, an internal control loop monitors the IC junction temperature and reduces the charge current if the internal temperature threshold is exceeded. The charger power stage and charge current sense functions are fully integrated. The charger function has high accuracy current and voltage regulation loops, charge status display, and charge termination. The input current limit and charge current are programmable using external resistors.
The bq24079QW-Q1 is an integrated Li-ion linear charger and system power-path management device targeted at space-constraint automotive applications such as telematics/eCall. The device can operate from 4.35 V to 6.4 V and support charge currents up to 1.5 A. The input voltage range with input overvoltage protection supports unregulated adapters. The USB input current limit accuracy and start up sequence allow the bq24079QW-Q1 to meet the USB-IF inrush current specification. Additionally, the input dynamic power management (VIN-DPM) prevents the system load from crashing incorrectly configured USB sources.
The bq24079QW-Q1 features dynamic power-path management (DPPM) that powers the system while simultaneously and independently charging the battery. The DPPM circuit reduces the charge current when the input current limit causes the system output to fall to the DPPM threshold; thus, supplying the system load at all times while monitoring the charge current separately. This feature along with the 4.1-V battery regulation voltage helps to extend battery life time by reducing the number of charge and discharge cycles on the battery, allowing for proper charge termination and enabling the system to run with a defective or absent battery pack.
Additionally, the regulated system input enables instant system turn-on when plugged in even with a totally discharged battery. The power-path management architecture also permits the battery to supplement the system current requirements when the adapter cannot deliver the peak system currents, enabling the use of a smaller adapter.
The battery is charged in three phases: conditioning, constant current, and constant voltage. In all charge phases, an internal control loop monitors the IC junction temperature and reduces the charge current if the internal temperature threshold is exceeded. The charger power stage and charge current sense functions are fully integrated. The charger function has high accuracy current and voltage regulation loops, charge status display, and charge termination. The input current limit and charge current are programmable using external resistors.