Overview
The Texas Instruments BQ24170RGYT is a highly integrated stand-alone Li-Ion and Li-Polymer switched-mode battery charger. It features a constant-frequency synchronous PWM controller with high-accuracy regulation of input current, charge current, and voltage. The device is designed to charge one, two, or three Li-Ion or Li-Polymer cells and includes two integrated N-channel power MOSFETs. It supports a wide input voltage range from 4.5 V to 17 V, making it suitable for charging batteries from various DC sources, including car batteries.
Key Specifications
| Parameter | Value |
|---|---|
| Package | VQFN (RGY), 24 pins |
| Operating Temperature Range | -40°C to 85°C |
| Input Voltage Range | 4.5 V to 17 V |
| Input Rating | 30 V with adjustable overvoltage protection |
| Charge Current | Up to 4 A |
| 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
- Automatic Power Path Selector Between Adapter and Battery
- Dynamic Power Management (DPM)
- Integrated 20-V Switching MOSFETs and Bootstrap Diode
- Internal Digital Soft Start
- Thermal Regulation Loop and Thermal Shutdown
- Battery Thermistor Sense for Hot/Cold Charge Suspend and Battery Detect
- Adjustable Input Overvoltage Protection and Cycle-by-Cycle Current Limit
Applications
The BQ24170RGYT is suitable for a variety of applications, including:
- Portable electronics such as smartphones, tablets, and laptops
- Industrial battery-powered devices
- Automotive systems requiring high-voltage DC input charging
- Consumer electronics with Li-Ion or Li-Polymer batteries
Q & A
- What is the input voltage range of the BQ24170RGYT?
The input voltage range is from 4.5 V to 17 V.
- How many cells can the BQ24170RGYT charge?
The BQ24170RGYT can charge one, two, or three Li-Ion or Li-Polymer cells.
- What is the maximum charge current of the BQ24170RGYT?
The maximum charge current is up to 4 A.
- Does the BQ24170RGYT have thermal protection features?
Yes, it includes thermal regulation loop and thermal shutdown features.
- How does the BQ24170RGYT manage power between the adapter and battery?
The device features an automatic power path selector between the adapter and battery.
- What is the efficiency of the BQ24170RGYT?
The efficiency is up to 94%.
- Does the BQ24170RGYT support dynamic power management?
Yes, it includes dynamic power management (DPM) to reduce charge current when the input power limit is reached.
- How accurate is the charge voltage regulation of the BQ24170RGYT?
The charge voltage regulation accuracy is ±0.5%.
- What is the package type and pin count of the BQ24170RGYT?
The device is packaged in a 24-pin VQFN (RGY) package.
- Can the BQ24170RGYT charge batteries from a car battery?
Yes, it can charge batteries from a DC source as high as 17 V, including car batteries.
