BQ24392RSER
USB charger detection devices with integrated switch support
Manufacturer： ti
series introduction
# BQ24392RSER Product Series Introduction
## 1. Overview
The BQ24392RSER is a highly integrated and advanced product series designed for battery charging and power management applications. Developed by Texas Instruments, this series offers a comprehensive solution for various portable and battery - powered devices, ensuring efficient, safe, and reliable charging operations.
## 2. Key Features
### 2.1 Charging Flexibility
- **Multiple Input Sources**: The BQ24392RSER can accept power from a variety of sources, including USB ports, wall adapters, and other regulated power supplies. This flexibility allows it to be used in different scenarios, such as charging a device via a laptop's USB port or a dedicated wall charger.
- **Adjustable Charging Current**: It provides the ability to adjust the charging current according to the battery's capacity and the power source's capabilities. This feature helps optimize the charging process, preventing over - charging and ensuring the battery's longevity. For example, for a small - capacity battery, a lower charging current can be set to avoid excessive heat generation.
### 2.2 High - Efficiency Charging
- **Integrated Power MOSFETs**: The series incorporates high - performance power MOSFETs within the chip. These MOSFETs have low on - resistance, which reduces power losses during the charging process. As a result, the overall charging efficiency is significantly improved, minimizing heat dissipation and saving energy.
- **Adaptive Charging Algorithm**: The BQ24392RSER utilizes an adaptive charging algorithm that continuously monitors the battery's state of charge, temperature, and other parameters. Based on this information, it adjusts the charging voltage and current in real - time to ensure the fastest and safest charging possible.
### 2.3 Safety Features
- **Over - Voltage and Over - Current Protection**: To safeguard the battery and the connected device, the BQ24392RSER is equipped with over - voltage and over - current protection mechanisms. In case of an abnormal voltage or current spike, the charger will automatically shut down or limit the power output, preventing damage to the battery and other components.
- **Thermal Protection**: The device monitors its own temperature and the battery's temperature during charging. If the temperature exceeds a safe threshold, the charging current is reduced or the charging process is stopped altogether to prevent overheating, which can lead to battery degradation or even safety hazards.
### 2.4 Compact Design
- **Small Form Factor**: The BQ24392RSER comes in a compact package, making it suitable for space - constrained applications such as smartphones, tablets, wearables, and other portable devices. Its small size allows for easy integration into the device's printed circuit board (PCB), saving valuable board space.
## 3. Functional Block Diagram and Operation
### 3.1 Input Power Management
- The input stage of the BQ24392RSER is responsible for detecting and regulating the input power source. It can handle different input voltages and currents, and it ensures that the power is properly conditioned before being used for charging the battery.
- The device also includes an input current limit feature, which can be set to protect the power source from over - drawing current.
### 3.2 Battery Charging Controller
- The battery charging controller manages the entire charging process. It starts with a pre - charge phase, where a low current is applied to the battery when it is deeply discharged. Then, it enters the constant - current (CC) phase, where a fixed charging current is supplied to the battery until it reaches a certain voltage level.
- After that, the charger switches to the constant - voltage (CV) phase, where the voltage is kept constant while the charging current gradually decreases as the battery approaches full
Images for reference
10_UQFN_4207268_3c
Image Preview
Image Preview