Overview
The Texas Instruments BQ24170RGYR is a highly integrated, standalone Li-Ion and Li-Polymer switched-mode battery charger. This device features a constant-frequency synchronous PWM controller with high-accuracy regulation of input current, charge current, and voltage. It is designed to charge one, two, or three Li-Ion or Li-Polymer cells, selected via the CELL pin. The BQ24170RGYR is particularly notable for its high integration, including two integrated N-channel power MOSFETs, and its ability to manage power efficiently through dynamic power management and an automatic power path selector.
Key Specifications
| Parameter | Value |
|---|---|
| Package | VQFN (RGY) with 24 pins |
| Operating Temperature Range | -40°C to 85°C |
| Maximum Charge Current | 4 A |
| Input Operating Voltage Range | 4.5 V to 17 V |
| Input Rating | 30 V with adjustable overvoltage protection |
| Battery Charge Voltage | 1-, 2-, or 3-cell with 4.2 V/Cell |
| Switching Frequency | 1.6 MHz |
| Efficiency | Up to 94% |
| Charge Voltage Regulation | ±0.5% |
| Charge Current Regulation | ±4% |
| Input Current Regulation | ±4% |
| Battery Current with Adapter Removed | <15 µA |
| Input Current with Adapter Present and Charge Disabled | <1.5 mA |
Key Features
- 1.6-MHz synchronous switched-mode charger with 4-A integrated N-MOSFETs
- Up to 94% efficiency
- 30-V input rating with adjustable overvoltage protection
- Automatic power path selector between adapter and battery
- Dynamic power management to reduce charge current when input power limit is reached
- Integrated 20-V switching MOSFETs and bootstrap diode
- Internal digital soft start
- Thermal regulation loop to limit temperature (TJ = 120°C)
- Thermal shutdown and battery thermistor sense for hot/cold charge suspend and battery detect
- Adjustable input overvoltage protection and cycle-by-cycle current limit
Applications
The BQ24170RGYR is suitable for a variety of applications, including:
- Portable electronics such as smartphones, tablets, and laptops
- Power tools and other battery-powered equipment
- Automotive systems, including charging from car batteries up to 17 V
- Consumer electronics requiring efficient and safe battery charging
Q & A
- What is the maximum charge current of the BQ24170RGYR?
The maximum charge current is 4 A.
- What is the operating temperature range of the BQ24170RGYR?
The operating temperature range is -40°C to 85°C.
- How many cells can the BQ24170RGYR charge?
The BQ24170RGYR can charge one, two, or three Li-Ion or Li-Polymer cells.
- What is the input operating voltage range of the BQ24170RGYR?
The input operating voltage range is 4.5 V to 17 V.
- Does the BQ24170RGYR have thermal protection features?
Yes, it includes thermal regulation loop, thermal shutdown, and battery thermistor sense for hot/cold charge suspend and battery detect.
- How does the BQ24170RGYR manage power efficiently?
The device features dynamic power management to reduce the charge current when the input power limit is reached, preventing overloading of the adapter.
- What type of package does the BQ24170RGYR come in?
The BQ24170RGYR comes in a 24-pin VQFN (RGY) package with an exposed pad.
- Can the BQ24170RGYR charge batteries from high-voltage DC sources?
Yes, it can charge batteries from DC sources as high as 17 V, including car batteries.
- Does the BQ24170RGYR have an automatic power path selector?
Yes, it automatically selects between the adapter and the battery to power the system.
- What is the efficiency of the BQ24170RGYR?
The efficiency of the BQ24170RGYR is up to 94%.
- How accurate is the charge voltage regulation of the BQ24170RGYR?
The charge voltage regulation is accurate to ±0.5%.
