Overview
The BQ25792RQMR from Texas Instruments is a highly integrated switch-mode buck-boost charger designed for 1-4 cell Li-ion and Li-polymer batteries. This device is optimized for high power density and supports all USB Power Delivery (USB-PD) 3.0 profiles. It features a dual-input selector and supports USB OTG (On-The-Go) output, making it versatile for various battery-powered applications. The BQ25792RQMR is packaged in a 29-pin 4 mm × 4 mm QFN (Quad Flat No-Lead) package, enhancing its suitability for space-constrained designs.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Input Voltage Range | 3.6 - 24 | V |
| Battery Voltage Range | Up to 18.8 | V |
| Charging Current | Up to 5 A | A |
| OTG Output Voltage Range | 2.8 - 22 | V |
| OTG Output Current Regulation | Up to 3.32 A | A |
| Switching Frequency | 750 kHz or 1.5 MHz | Hz |
| Ambient Temperature Range | -40 to 85 | °C |
| Junction Temperature Range | -40 to 125 | °C |
| Package Type | 29-Pin QFN-HR | |
| Package Dimensions | 4 mm × 4 mm | mm |
Key Features
- High power density, high integration buck-boost charger for 1-4 cell batteries supporting any USB-PD 3.0 profile.
- Integrates four switching MOSFETs, input and charging current sensing circuits, and the battery FET (QBAT).
- Flexible autonomous and I2C mode for optimal system performance.
- Integrated 16-bit ADC for voltage, current, and temperature monitoring.
- Low battery quiescent current: 21 µA for battery only operation and 600 nA in Charger Shutdown Mode.
- High accuracy: +0.65% to -0.85% charge voltage regulation for 2S-4S batteries, ±5% charge current regulation, and ±5% input current regulation.
- Safety features include thermal regulation, thermal shutdown, input/battery OVP and OCP, converter MOSFETs OCP, and charging safety timer.
- Supports USB Type-C™ and USB power delivery (USB-PD) applications with 2.8-V to 22-V OTG output voltage and up to 3.32 A OTG output current regulation.
- Narrow voltage DC (NVDC) power path management and battery supplement mode to support the system without overloading the input source.
Applications
- Video doorbells and smart home control systems.
- Data concentrators, robotic lawn mowers, and vacuum robots.
- Asset tracking and mobile POS systems.
- Multiparameter patient monitors, electrocardiogram (ECG), and ultrasound smart probes.
Q & A
- What type of batteries does the BQ25792RQMR support?
The BQ25792RQMR supports 1-4 cell Li-ion and Li-polymer batteries.
- What is the input voltage range of the BQ25792RQMR?
The input voltage range is 3.6 V to 24 V.
- What is the maximum charging current of the BQ25792RQMR?
The maximum charging current is up to 5 A.
- Does the BQ25792RQMR support USB-PD 3.0?
Yes, it supports all USB-PD 3.0 profiles.
- What is the OTG output voltage range of the BQ25792RQMR?
The OTG output voltage range is 2.8 V to 22 V.
- What safety features does the BQ25792RQMR include?
It includes thermal regulation, thermal shutdown, input/battery OVP and OCP, converter MOSFETs OCP, and charging safety timer.
- What is the package type and dimensions of the BQ25792RQMR?
The package type is 29-Pin QFN-HR, and the dimensions are 4 mm × 4 mm.
- What is the ambient temperature range for the BQ25792RQMR?
The ambient temperature range is -40°C to 85°C.
- Does the BQ25792RQMR have integrated monitoring capabilities?
Yes, it includes an integrated 16-bit ADC for voltage, current, and temperature monitoring.
- What are some typical applications of the BQ25792RQMR?
Typical applications include video doorbells, smart home control systems, data concentrators, robotic lawn mowers, and medical devices like multiparameter patient monitors.
