Overview
The BQ25175YBGR from Texas Instruments is a standalone, 800-mA linear battery charger designed for 1-cell Li-Ion and Li-Poly batteries. This integrated circuit offers a single power output that charges the battery, with the capability to have the system load connected in parallel to the battery. The charger features three distinct phases for charging: precharge, fast-charge constant current, and voltage regulation. It includes advanced safety features such as battery temperature monitoring, overvoltage protection, and charge safety timers. The device is suitable for applications requiring efficient and safe battery charging, particularly in compact and power-sensitive designs.
Key Specifications
| Parameter | Min | Max | Unit | |
|---|---|---|---|---|
| Input Voltage | -0.3 | 30 | V | |
| Output Current | 800 | mA | ||
| Operating Supply Voltage | 3.0 | 6.6 | V | |
| Junction Temperature | -40 | 150 | °C | |
| Storage Temperature | -65 | 150 | °C | |
| Package Type | DSBGA-6 | |||
| Package Size | 0.8 mm x 1.25 mm |
Key Features
- Input voltage up to 30-V tolerant
- Automatic Sleep Mode for low power consumption with 350-nA battery leakage current
- Programmable fast-charge current through an external resistor
- Three-phase charging: precharge, fast-charge constant current, and voltage regulation
- Battery temperature monitoring with charging current reduction or stop based on temperature thresholds
- Overvoltage protection and charge safety timers
- Charge status display and automatic charge termination
- Compact DSBGA-6 package
Applications
- Smart trackers
- True wireless headsets
- Smart remote controls
- Pulse oximeters
- Blood glucose monitors
Q & A
- What is the maximum output current of the BQ25175YBGR? The maximum output current is 800 mA.
- What is the operating supply voltage range for the BQ25175YBGR? The operating supply voltage range is from 3.0 V to 6.6 V.
- How does the BQ25175YBGR handle battery temperature? The device monitors battery temperature and reduces or stops charging based on predefined temperature thresholds.
- What are the safety features of the BQ25175YBGR? The device includes overvoltage protection, charge safety timers, and automatic charge termination.
- Can the system load be connected in parallel with the battery? Yes, the system load can be connected in parallel with the battery as long as it does not prevent the battery from charging fully within the safety timer duration.
- How is the fast-charge current programmed? The fast-charge current is programmable through an external resistor connected to the ISET pin.
- What is the package type and size of the BQ25175YBGR? The package type is DSBGA-6, and the size is 0.8 mm x 1.25 mm.
- What are some typical applications for the BQ25175YBGR? Typical applications include smart trackers, true wireless headsets, smart remote controls, pulse oximeters, and blood glucose monitors.
- How does the device handle low power consumption? The device features an Automatic Sleep Mode for low power consumption with a battery leakage current of 350 nA.
- What happens if the battery temperature exceeds the safe range? If the battery temperature exceeds the safe range, the device stops charging, enters the STANDBY state, and blinks the STAT pin until the temperature returns to normal conditions.
