Overview
The Texas Instruments BQ24298RTWR is a highly integrated switch-mode battery charge management and system power path management device. It is designed for single-cell Li-Ion and Li-polymer batteries, making it ideal for a wide range of smart phone and tablet applications. The device features a low impedance power path that optimizes switch-mode operation efficiency, reduces battery charging time, and extends battery life during the discharging phase. It supports USB 2.0 and USB 3.0 power specifications with input current and voltage regulation, and includes USB On-the-Go (OTG) functionality with adjustable output voltage.
Key Specifications
| Parameter | Minimum | Typical | Maximum | Unit |
|---|---|---|---|---|
| Input Voltage (VIN) | 3.9 | - | 6.2 | V |
| Output Current (SYS) | - | - | 3.5 | A |
| Battery Voltage (VBAT) | - | - | 4.4 | V |
| Fast Charging Current (IBAT) | - | - | 3 | A |
| Operating Temperature Range (TA) | -40 | - | 85 | °C |
| Junction-to-Ambient Thermal Resistance (RθJA) | - | - | 32.2 | °C/W |
| Maximum DC System Voltage Output (VSYS_MAX) | 4.43 | - | - | V |
| Minimum DC System Voltage Output (VSYS_MIN) | 3.5 | 3.65 | - | V |
Key Features
- 90% high efficiency switch-mode 3-A charger
- USB OTG with adjustable output 4.55 V to 5.5 V at 1 A or 1.5 A
- Narrow VDC (NVDC) power path management for instant system on with no battery or deeply discharged battery
- 1.5-MHz switching frequency for low profile 1.2-mm inductor
- I2C port for optimal system performance and status reporting
- Autonomous battery charging with or without host management
- High accuracy: ±0.5% charge voltage regulation, ±7% charge current regulation, ±7.5% input current regulation
- High integration: power path management, synchronous switching MOSFETs, integrated current sensing, bootstrap diode, internal loop compensation
- Safety features: battery temperature sensing, charging safety timer, thermal regulation and thermal shutdown, input and system over-voltage protection, MOSFET over-current protection
- Charge status outputs for LED or host processor
- Maximum power tracking capability by input voltage regulation
- 20-µA low battery leakage current and support for shipping mode and system reset
- I2C forced BATFET off with delay (9 s typical)
- 4.00-mm x 4.00-mm WQFN-24 package
Applications
- Tablet PC
- Smart Phone
- Internet Devices
- Portable Audio Speaker
Q & A
- What is the input voltage range of the BQ24298RTWR?
The input voltage range is from 3.9 V to 6.2 V.
- What is the maximum output current of the BQ24298RTWR?
The maximum output current (SYS) is 3.5 A.
- Does the BQ24298RTWR support USB OTG?
Yes, it supports USB OTG with adjustable output voltage from 4.55 V to 5.5 V at 1 A or 1.5 A.
- What is the switching frequency of the BQ24298RTWR?
The switching frequency is 1.5 MHz.
- How does the BQ24298RTWR manage power path?
The device features Narrow VDC (NVDC) power path management, which ensures the system remains on even when the battery is completely depleted or removed.
- What safety features does the BQ24298RTWR include?
The device includes battery temperature sensing, charging safety timer, thermal regulation and thermal shutdown, input and system over-voltage protection, and MOSFET over-current protection.
- How accurate is the charge voltage regulation of the BQ24298RTWR?
The charge voltage regulation accuracy is ±0.5%.
- What is the package size of the BQ24298RTWR?
The device is available in a 4.00-mm x 4.00-mm WQFN-24 package.
- Does the BQ24298RTWR support I2C communication?
Yes, it includes an I2C port for optimal system performance and status reporting.
- What is the thermal shutdown temperature of the BQ24298RTWR?
The thermal shutdown temperature is 160°C with a hysteresis of 30°C.
