BQ25798RQMR
ActiveI²C CONTROLLED, 1-4-CELL, 5-A BUCK-BOOST SOLAR BATTERY CHARGER WITH DUAL-INPUT SELECTOR AND MPPT
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BQ25798RQMR
ActiveI²C CONTROLLED, 1-4-CELL, 5-A BUCK-BOOST SOLAR BATTERY CHARGER WITH DUAL-INPUT SELECTOR AND MPPT
Technical Specifications
Parameters and characteristics for this part
| Specification | BQ25798RQMR |
|---|---|
| Battery Chemistry | Lithium Ion/Polymer |
| Battery Pack Voltage [Max] | 18.8 V |
| Charge Current - Max [Max] | 5 A |
| Current - Charging | Constant |
| Fault Protection | Over Voltage, Over Current |
| Interface | I2C |
| Mounting Type | Surface Mount |
| Number of Cells [Max] [custom] | 4 |
| Number of Cells [Min] [custom] | 1 |
| Operating Temperature [Max] | 85 °C |
| Operating Temperature [Min] | -40 °C |
| Package / Case | 29-VFQFN |
| Programmable Features | Current, Timer, Voltage |
| Supplier Device Package | 29-VQFN-HR (4x4) |
| Voltage - Supply (Max) [Max] | 24 V |
Pricing
Prices provided here are for design reference only. For realtime values and availability, please visit the distributors directly
| Distributor | Package | Quantity | $ | |
|---|---|---|---|---|
| Digikey | Cut Tape (CT) | 1 | $ 7.33 | |
| 10 | $ 5.00 | |||
| 25 | $ 4.39 | |||
| 100 | $ 3.72 | |||
| 250 | $ 3.39 | |||
| 500 | $ 3.19 | |||
| 1000 | $ 3.02 | |||
| Digi-Reel® | 1 | $ 7.33 | ||
| 10 | $ 5.00 | |||
| 25 | $ 4.39 | |||
| 100 | $ 3.72 | |||
| 250 | $ 3.39 | |||
| 500 | $ 3.19 | |||
| 1000 | $ 3.02 | |||
| Tape & Reel (TR) | 3000 | $ 2.86 | ||
| Texas Instruments | LARGE T&R | 1 | $ 3.64 | |
| 100 | $ 3.19 | |||
| 250 | $ 2.23 | |||
| 1000 | $ 1.80 | |||
BQ25798 Series
I²C controlled, 1-4-cell, 5-A buck-boost solar battery charger with dual-input selector and MPPT
| Part | Interface | Mounting Type | Supplier Device Package | Current - Charging | Battery Pack Voltage [Max] | Operating Temperature [Max] | Operating Temperature [Min] | Number of Cells [Max] [custom] | Number of Cells [Min] [custom] | Fault Protection | Charge Current - Max [Max] | Package / Case | Battery Chemistry | Programmable Features | Voltage - Supply (Max) [Max] |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Texas Instruments BQ25798RQMR | I2C | Surface Mount | 29-VQFN-HR (4x4) | Constant | 18.8 V | 85 °C | -40 °C | 4 | 1 | Over Current, Over Voltage | 5 A | 29-VFQFN | Lithium Ion/Polymer | Current, Timer, Voltage | 24 V |
Description
General part information
BQ25798 Series
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 VOCscaling MPPT algorithm. BQ25798 supports ultra-fast switchover from the adapter to a converted battery voltage in Backup Mode.
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 VOCscaling MPPT algorithm. BQ25798 supports ultra-fast switchover from the adapter to a converted battery voltage in Backup Mode.
Documents
Technical documentation and resources