Overview
The BQ25790YBGR is a fully integrated switch-mode buck-boost charger designed by Texas Instruments for charging 1-4 cell Li-ion and Li-polymer batteries. This device offers high power density and design flexibility, making it suitable for a wide range of applications, including smartphones, tablets, and other portable devices. It supports USB Type-C™ and USB power delivery (USB-PD) with advanced features such as narrow VDC power path management and dual-input power mux controller.
Key Specifications
| Parameter | Value |
|---|---|
| Input Voltage Range | 3.6 V to 24 V (30 V absolute maximum) |
| Switching Frequencies | 750 kHz and 1.5 MHz (programmable) |
| Charging Current | Up to 5 A with 10 mA resolution |
| OTG Output Voltage | 2.8 V to 22 V with 10 mV resolution |
| OTG Output Current | Up to 3.32 A with 40 mA resolution |
| Package Type | 56-pin DSBGA (YBG) package, 2.9mm × 3.3mm |
| Operating Temperature Range | -40°C to 85°C |
| Efficiency | 96.5% at 9 V input, 94.5% at 15 V input at 3 A ICHG |
| ADC Resolution | 16-bit for voltage, current, and temperature monitoring |
Key Features
- High efficient synchronous switch-mode buck-boost charger for 1-4 cell batteries.
- Dual-input power mux controller for source selection.
- Supports wide range of input sources, including legacy USB adapters and high voltage USB PD adapters.
- Narrow-VDC (NVDC) Power Path management to ensure system operation even when the battery is completely discharged or removed.
- Integrated 16-bit ADC for monitoring charge current and input/battery/system voltages.
- Thermal regulation and thermal shutdown for safety.
- Input/battery over-voltage and over-current protections.
- Low battery quiescent current (typical 21 µA at battery only operation).
- Flexible autonomous and I2C mode for optimal system performance.
Applications
The BQ25790YBGR is designed for use in various portable electronic devices, including:
- Smartphones
- Tablets
- Laptops
- Other USB-PD enabled devices
It is particularly useful in applications requiring high power density, efficient battery charging, and advanced power management features.
Q & A
- What is the input voltage range of the BQ25790YBGR?
The input voltage range is 3.6 V to 24 V with a 30 V absolute maximum rating. - What are the programmable switching frequencies of the BQ25790YBGR?
The switching frequencies are 750 kHz and 1.5 MHz. - What is the maximum charging current of the BQ25790YBGR?
The maximum charging current is up to 5 A with a 10 mA resolution. - What is the OTG output voltage range of the BQ25790YBGR?
The OTG output voltage range is 2.8 V to 22 V with a 10 mV resolution. - What type of package does the BQ25790YBGR come in?
The BQ25790YBGR comes in a 56-pin DSBGA (YBG) package, measuring 2.9mm × 3.3mm. - What is the operating temperature range of the BQ25790YBGR?
The operating temperature range is -40°C to 85°C. - What safety features does the BQ25790YBGR include?
The device includes thermal regulation, thermal shutdown, input/battery over-voltage and over-current protections, and charging safety timers. - How does the BQ25790YBGR manage power when the battery is discharged or removed?
The device uses narrow-VDC Power Path management to ensure the system operates even when the battery is completely discharged or removed. - What is the resolution of the integrated ADC in the BQ25790YBGR?
The integrated ADC has a 16-bit resolution for monitoring voltage, current, and temperature. - What is the typical quiescent current of the BQ25790YBGR in battery-only operation?
The typical quiescent current is 21 µA in battery-only operation.
