Overview
The BQ25170JDSGR is an integrated 800-mA linear battery charger designed by Texas Instruments for 1-cell Li-Ion, Li-Polymer, and LiFePO4 batteries. This device is particularly suited for space-limited portable applications. It features a single power output that charges the battery, and the system load can be placed in parallel with the battery, provided the average system load does not prevent the battery from charging fully within the safety timer duration. The charger operates through three phases: precharge, fast-charge constant current, and voltage regulation to reach full capacity.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Input Voltage | 3.0 to 6.6 | V |
| Output Voltage | Up to 4.4 | V |
| Output Current | Up to 800 mA | A |
| Junction Temperature Range | -40 to 125 | °C |
| Package Type | WSON (DSG) with 8 pins | |
| Package Body Size | 2.0 mm x 2.0 mm | |
| Charge Voltage Accuracy | ±0.5% | |
| Charge Current Accuracy | ±10% | |
| Thermal Regulation | 125°C | °C |
| Thermal Shutdown Protection | 150°C | °C |
Key Features
- Input voltage up to 30-V tolerant
- Automatic Sleep Mode for low power consumption
- 350-nA battery leakage current and 80-µA input leakage current when charge is disabled
- Supports 1-cell Li-Ion, Li-Polymer, and LiFePO4 batteries
- External resistor programmable operation for charge voltage and current
- High accuracy charge voltage and current regulation loops
- NTC thermistor input to monitor battery temperature
- Open-drain output for status and fault indication, and power good indication
- Integrated fault protection including overvoltage, overcurrent, and short-circuit protection
Applications
- True wireless headsets
- Wearable accessories, smart bands
- Beauty and grooming devices (e.g., electric toothbrushes)
- Fleet management and asset tracking devices
Q & A
- What type of batteries does the BQ25170JDSGR support?
The BQ25170JDSGR supports 1-cell Li-Ion, Li-Polymer, and LiFePO4 batteries.
- What is the maximum output current of the BQ25170JDSGR?
The maximum output current is up to 800 mA.
- What is the operating temperature range of the BQ25170JDSGR?
The operating temperature range is from -40°C to 125°C.
- How is the charge voltage and current programmed in the BQ25170JDSGR?
The charge voltage and current are programmable through external resistors connected to the VSET and ISET pins.
- What kind of fault protections does the BQ25170JDSGR have?
The device includes overvoltage protection, overcurrent protection, thermal regulation, thermal shutdown protection, and short-circuit protection.
- Can the system load be placed in parallel with the battery?
Yes, the system load can be placed in parallel with the battery, provided the average system load does not prevent the battery from charging fully within the safety timer duration.
- What are the typical applications of the BQ25170JDSGR?
Typical applications include true wireless headsets, wearable accessories, beauty and grooming devices, and fleet management and asset tracking devices.
- How does the BQ25170JDSGR manage battery temperature?
The device includes an NTC thermistor input to monitor battery temperature.
- What is the package type and size of the BQ25170JDSGR?
The package type is WSON (DSG) with 8 pins, and the package body size is 2.0 mm x 2.0 mm.
- Does the BQ25170JDSGR have any power-saving features?
Yes, it has an Automatic Sleep Mode for low power consumption.
