BQ25720 Series
SMBus 1- to 4-cell NVDC buck-boost battery charge controller with power path and USB-C® PD OTG
Manufacturer: Texas Instruments
Link to Manufacturer Page: https://www.ti.com/
Catalog
SMBus 1- to 4-cell NVDC buck-boost battery charge controller with power path and USB-C® PD OTG
| Part | Voltage - Supply (Max) [Max] | Programmable Features | Fault Protection | Current - Charging | Battery Chemistry | Supplier Device Package | Battery Pack Voltage [Max] | Operating Temperature [Max] | Operating Temperature [Min] | Charge Current - Max [Max] | Number of Cells [Max] [custom] | Number of Cells [Min] [custom] | Mounting Type |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Texas Instruments BQ25720RSNR | 26 V | Voltage | Over Current, Over Temperature | Constant - Programmable | Lead Acid, Li-Ion/Li-Polymer, Lithium Phosphate/LiFePO4, NiCd, NiMH, SuperCap | 32-QFN (4x4) | 24 V | 125 ¯C | -40 °C | 16.256 A | 4 | 1 | Surface Mount |
Key Features
• Pin-to-pin compatible to BQ25710Buck-boost narrow voltage DC (NVDC) charger for USB-C Power Delivery (PD) interface platform3.5-V to 26-V input range to charge 1- to 4-cell batteryCharge current up to 16.2 A/8.1 A with 128-mA/64-mA resolution based on 5-mΩ/10-mΩ sensing resistorInput current limit up to 10 A/6.35 A with 100-mA/50-mA resolution based on 5-mΩ/10-mΩ sensing resistorSupport USB 2.0, USB 3.0, USB 3.1 and USB Power Delivery (PD)Input Current Optimizer (ICO) to extract max input power without overloading the adapterIntegrated Fast Role Swap (FRS) feature following USB-PD specificationSeamless transition between buck, buck-boost, and boost operationsInput current and voltage regulation (IINDPM and VINDPM) against source overloadTI patented switching frequency dithering pattern for EMI noise reductionTI patented Pass Through Mode (PTM) for system power efficiency improvement and battery fast charging achieving 99% efficiency.IMVP8/IMVP9 compliant system features for Intel platformEnhanced Vmin Active Protection (VAP) mode supplements battery from input capacitors during system peak power spike following latest Intel specificationComprehensivePROCHOTprofileTwo level discharge current limitPROCHOTprofile to avoid battery wire-outSystem power monitorInput and battery current monitor through dedicated pinsIntegrated 8-bit ADC to monitor voltage, current and powerBattery MOSFET ideal diode operation in supplement mode to support system when adapter is fully loadedPower up USB port from battery (USB OTG)3-V to 24-V OTG with 8-mV resolutionOutput current limit up to 12.7 A/6.35 A with 100-mA/50-mA resolution based on 5-mΩ/10-mΩ sensing resistor800-kHz/1.2-MHz programmable switching frequency with 2.2-µH/1.0-µH inductorSMBus host control interface for flexible system configurationHigh accuracy for the regulation and monitor±0.5% Charge voltage regulation±3% Charge current regulation±2.5% Input current regulation±2% Input/charge current monitorSafetyThermal shutdownInput, system, battery overvoltage protectionInput, MOSFET, inductor overcurrent protectionPackage: 32-Pin 4.0 mm × 4.0 mm WQFNPin-to-pin compatible to BQ25710Buck-boost narrow voltage DC (NVDC) charger for USB-C Power Delivery (PD) interface platform3.5-V to 26-V input range to charge 1- to 4-cell batteryCharge current up to 16.2 A/8.1 A with 128-mA/64-mA resolution based on 5-mΩ/10-mΩ sensing resistorInput current limit up to 10 A/6.35 A with 100-mA/50-mA resolution based on 5-mΩ/10-mΩ sensing resistorSupport USB 2.0, USB 3.0, USB 3.1 and USB Power Delivery (PD)Input Current Optimizer (ICO) to extract max input power without overloading the adapterIntegrated Fast Role Swap (FRS) feature following USB-PD specificationSeamless transition between buck, buck-boost, and boost operationsInput current and voltage regulation (IINDPM and VINDPM) against source overloadTI patented switching frequency dithering pattern for EMI noise reductionTI patented Pass Through Mode (PTM) for system power efficiency improvement and battery fast charging achieving 99% efficiency.IMVP8/IMVP9 compliant system features for Intel platformEnhanced Vmin Active Protection (VAP) mode supplements battery from input capacitors during system peak power spike following latest Intel specificationComprehensivePROCHOTprofileTwo level discharge current limitPROCHOTprofile to avoid battery wire-outSystem power monitorInput and battery current monitor through dedicated pinsIntegrated 8-bit ADC to monitor voltage, current and powerBattery MOSFET ideal diode operation in supplement mode to support system when adapter is fully loadedPower up USB port from battery (USB OTG)3-V to 24-V OTG with 8-mV resolutionOutput current limit up to 12.7 A/6.35 A with 100-mA/50-mA resolution based on 5-mΩ/10-mΩ sensing resistor800-kHz/1.2-MHz programmable switching frequency with 2.2-µH/1.0-µH inductorSMBus host control interface for flexible system configurationHigh accuracy for the regulation and monitor±0.5% Charge voltage regulation±3% Charge current regulation±2.5% Input current regulation±2% Input/charge current monitorSafetyThermal shutdownInput, system, battery overvoltage protectionInput, MOSFET, inductor overcurrent protectionPackage: 32-Pin 4.0 mm × 4.0 mm WQFN
Description
AI
The BQ25720 is a synchronous NVDC buck-boost battery charge controller to charge a 1- to 4-cell battery from a wide range of input sources including USB adapter, high voltage USB-C Power Delivery (PD) sources, and traditional adapters.
The NVDC configuration allows the system to be regulated based on battery voltage, but not drop below system minimum voltage. The system keeps operating even when the battery is completely discharged or removed. When load power exceeds input source rating, the battery goes into supplement mode and prevents the system from crashing.
During power up, the charger sets the converter to a buck, boost, or buck-boost configuration based on the input source and battery conditions. The charger seamlessly transitions between the buck, boost, and buck-boost operation modes without host control.
In the absence of an input source, the BQ25720 supports the USB On-the-Go (OTG) function from a 1- to 4-cell battery to generate an adjustable 3-V to 24-V output on VBUS with 8-mV resolution. The OTG output voltage transition slew rate can be configured to comply with the USB-PD 3.0 PPS specification.
When only a battery powers the system and no external load is connected to the USB OTG port, the BQ25720 implements the latest Intel Vmin Active Protection (VAP) feature, in which the device charges up the VBUS voltage from the battery to store some energy in the input decoupling capacitors. During a system peak power spike, the energy stored in the input capacitors supplements the system, to prevent the system voltage from dropping below the minimum system voltage and causing a system crash.
The BQ25720 monitors adapter current, battery current, and system power. The flexibly programmedPROCHOToutput goes directly to the CPU for throttle back when needed.
The latest version of the USB-C PD specification includes Fast Role Swap (FRS) to ensure power role swapping occurs in a timely fashion so that the device(s) connected to the dock can avoid experiencing momentary power loss or glitching. This device integrates FRS in compliance with the PD specification.
TI patented switching frequency dithering pattern can significantly reduce EMI noise over the whole conductive EMI frequency range (150 kHz to 30 MHz). Multiple dithering scale options are available to provide flexibility for different applications to simplify EMI noise filter design.
The charger can be operated in the TI patented Pass Through Mode (PTM) to improve efficiency over the full load range. In PTM, input power is directly passed through the charger to the system. Switching losses of the MOSFETs and inductor core loss can be saved for high efficiency operation.
The BQ25720 is available in a 32-pin 4 mm × 4 mm WQFN package.
The BQ25720 is a synchronous NVDC buck-boost battery charge controller to charge a 1- to 4-cell battery from a wide range of input sources including USB adapter, high voltage USB-C Power Delivery (PD) sources, and traditional adapters.
The NVDC configuration allows the system to be regulated based on battery voltage, but not drop below system minimum voltage. The system keeps operating even when the battery is completely discharged or removed. When load power exceeds input source rating, the battery goes into supplement mode and prevents the system from crashing.
During power up, the charger sets the converter to a buck, boost, or buck-boost configuration based on the input source and battery conditions. The charger seamlessly transitions between the buck, boost, and buck-boost operation modes without host control.
In the absence of an input source, the BQ25720 supports the USB On-the-Go (OTG) function from a 1- to 4-cell battery to generate an adjustable 3-V to 24-V output on VBUS with 8-mV resolution. The OTG output voltage transition slew rate can be configured to comply with the USB-PD 3.0 PPS specification.
When only a battery powers the system and no external load is connected to the USB OTG port, the BQ25720 implements the latest Intel Vmin Active Protection (VAP) feature, in which the device charges up the VBUS voltage from the battery to store some energy in the input decoupling capacitors. During a system peak power spike, the energy stored in the input capacitors supplements the system, to prevent the system voltage from dropping below the minimum system voltage and causing a system crash.
The BQ25720 monitors adapter current, battery current, and system power. The flexibly programmedPROCHOToutput goes directly to the CPU for throttle back when needed.
The latest version of the USB-C PD specification includes Fast Role Swap (FRS) to ensure power role swapping occurs in a timely fashion so that the device(s) connected to the dock can avoid experiencing momentary power loss or glitching. This device integrates FRS in compliance with the PD specification.
TI patented switching frequency dithering pattern can significantly reduce EMI noise over the whole conductive EMI frequency range (150 kHz to 30 MHz). Multiple dithering scale options are available to provide flexibility for different applications to simplify EMI noise filter design.
The charger can be operated in the TI patented Pass Through Mode (PTM) to improve efficiency over the full load range. In PTM, input power is directly passed through the charger to the system. Switching losses of the MOSFETs and inductor core loss can be saved for high efficiency operation.
The BQ25720 is available in a 32-pin 4 mm × 4 mm WQFN package.