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BQ25798RQMR
5-A buck-boost solar battery charger
Brands: Texas Instruments
Mfr.Part #: BQ25798RQMR
Datasheet: BQ25798RQMR Datasheet (PDF)
Package/Case: VQFN-HR (RQM)-29
RoHS Status:
Stock Condition: 4168 pcs, New Original
Warranty: 1 Year Ovaga Warranty - Find Out More
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Add To BomBQ25798RQMR General Description
The BQ25798 is a fully integrated switch-mode buck -boost charger for 1-4 cell Li-ion batteries and Li-polymer batteries. The integration includes 4 switching MOSFETs, input and charging current sensing circuits, the battery FET and all the loop compensation of the buck-boost converter. It uses NVDC power path management, regulating the system not 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. BQ25798 also maximizes power from photovoltaic panels using its built-in VOC scaling MPPT algorithm. BQ25798 supports ultra-fast switchover from the adapter to a converted battery voltage in Backup Mode.
Features
- High power density, high integration buck -boost charger for 1-4 cell batteries supporting USB PD 3.0 profile
- Integrates four switching MOSFETs, BATFET
- Integrates input and charging current sensing
- Highly efficient
- 750-kHz or 1.5-MHz switching frequencies
- 5-A charging current with 10-mA resolution
- 96.5% efficient: 16-V battery at 3A from 20V
- Supports a wide range of input sources
- Autonomously sampled open circuit voltage (VOC) maximum power point tracking (MPPT) for charging from a photovoltaic panel
- 3.6-V to 24-V wide input operating voltage range with 30-V absolute maximum rating
- Detects USB BC1.2, HVDCP and non-standard adapters
- Dual-input power mux controller (optional)
- Narrow voltage DC (NVDC) power path
- Backup Mode with Ultra-fast switchover to adjustable voltage
- Powers USB port from battery (USB OTG)
- 2.8-V to 22-V OTG output voltage with 10-mV resolution to support USB-PD PPS
- OTG output current regulation up to 3.32 A with 40-mA resolution
- Flexible autonomous and I2C mode for optimal system performance
- Integrated 16-bit ADC for voltage, current, and temperature monitoring
- Low battery quiescent current
- 17 µA for battery only operation
- 500 nA in Charger Shutdown Mode
- High accuracy
- -0.25% to +0.65% charge voltage regulation for 2S batteries
- ±5% charge current regulation
- ±5% input current regulation
- Safety
- Thermal regulation and thermal shutdown
- Input/battery OVP and OCP
- Converter MOSFETs OCP
- Charging safety timer
- Package
- 29-Pin 4 mm × 4 mm QFN
Application
Specifications
| Parameter | Value | Parameter | Value |
|---|---|---|---|
| Number of series cells | 1, 2, 3, 4 | Charge current (max) (A) | 5 |
| Vin (max) (V) | 24 | Cell chemistry | Li-Ion/Li-Polymer, Lithium Phosphate/LiFePO4 |
| Battery charge voltage (min) (V) | 3 | Battery charge voltage (max) (V) | 18.8 |
| Absolute max Vin (max) (V) | 30 | Control topology | Switch-Mode Buck-boost |
| Control interface | I2C | Features | BAT temp thermistor monitoring (JEITA profile), BAT temp thermistor monitoring (hot/cold profile), IC thermal regulation, ICO (Input Current Optimization), IINDPM (Input current limit), Input OVP, Integrated ADC, Integrated LDO, Power Path, Solar input/MPPT, USB C/PD compatible, USB D+/D-/BC1.2 integrated, USB OTG integrated, VINDPM (Input voltage threshold to maximize adaptor power) |
| Vin (min) (V) | 3.6 | Rating | Catalog |
| Operating temperature range (°C) | -40 to 85 |
Shipping
| Shipping Type | Ship Fee | Lead Time | |
|---|---|---|---|
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DHL | $20.00-$40.00 (0.50 KG) | 2-5 days |
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Fedex | $20.00-$40.00 (0.50 KG) | 2-5 days |
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UPS | $20.00-$40.00 (0.50 KG) | 2-5 days |
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TNT | $20.00-$40.00 (0.50 KG) | 2-5 days |
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EMS | $20.00-$40.00 (0.50 KG) | 2-5 days |
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REGISTERED AIR MAIL | $20.00-$40.00 (0.50 KG) | 2-5 days |
Processing Time：Shipping fee depend on different zone and country.
Payment
| Terms of payment | Hand Fee | |
|---|---|---|
 |
Wire Transfer | charge US$30.00 banking fee. |
 |
Paypal | charge 4.0% service fee. |
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Credit Card | charge 3.5% service fee. |
 |
Western Union | charge US.00 banking fee. |
 |
Money Gram | charge US$0.00 banking fee. |
Guarantees
1.The electronic components you purchase include 365 Days Warranty, We guarantee product quality.
2.If some of the items you received aren't of perfect quality, we would resiponsibly arrange your refund or replacement. But the items must remain their orginal condition.
Packing
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Step1 :Product
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Step2 :Vacuum packaging
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![Anti-static bag]( "Anti-static bag")
Step3 :Anti-static bag
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![Individual packaging]( "Individual packaging")
Step4 :Individual packaging
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![Packaging boxes]( "Packaging boxes")
Step5 :Packaging boxes
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![bar-code shipping tag]( "bar-code shipping tag")
Step6 :bar-code shipping tag
All the products will packing in anti-staticbag. Ship with ESD antistatic protection.
Outside ESD packing’s lable will use ourcompany’s information: Part Mumber, Brand and Quantity.
We will inspect all the goods before shipment,ensure all the products at good condition and ensure the parts are new originalmatch datasheet.
After all the goods are ensure no problems afterpacking, we will packing safely and send by global express. It exhibitsexcellent puncture and tear resistance along with good seal integrity.
We provide high quality products, thoughtful service and after sale guarantee
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We have rich products, can meet your various needs.
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Minimum order quantity starts from 1pcs.
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Lowest international shipping fee starts from $0.00
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![guarantee]( "guarantee")
365 days quality guarantee for all products
