BQ24155RGY
Fully integrated switch-mode Li-Ion battery charger for single-cell applications
Manufacturer： ['analog-devices', 'ti']
series introduction
# Introduction to the BQ24155RGY Product Series
## 1. Overview
The BQ24155RGY is a highly efficient and feature - rich product series designed for battery charging applications. It is developed by Texas Instruments, a renowned leader in the semiconductor industry. This series is specifically engineered to provide reliable and optimized charging solutions for a wide range of portable devices, including smartphones, tablets, wearables, and other battery - powered gadgets.
## 2. Key Features
### 2.1 Charging Efficiency
- The BQ24155RGY series offers high - efficiency charging capabilities. It can convert the input power from a power source (such as a USB port or an AC adapter) into the appropriate voltage and current for charging the battery with minimal power loss. This high efficiency not only reduces energy consumption but also helps in minimizing heat generation during the charging process, which is crucial for the longevity of both the charger and the battery.
- It supports a wide input voltage range, typically from 3.9V to 6.5V, which allows it to be compatible with various power sources. This flexibility makes it suitable for use in different charging scenarios, whether it's a low - power USB charger or a higher - power wall adapter.
### 2.2 Battery Management
- One of the standout features of the BQ24155RGY is its advanced battery management system. It can accurately detect the battery's state of charge (SOC) and adjust the charging current and voltage accordingly. For example, during the initial stage of charging, when the battery is deeply discharged, it can provide a high - current fast - charge mode to quickly replenish the battery's energy. As the battery approaches full charge, it automatically switches to a trickle - charge mode to prevent overcharging and ensure the battery's safety and longevity.
- The series also supports multiple battery chemistries, including lithium - ion (Li - Ion) and lithium - polymer (Li - Po) batteries. This makes it a versatile solution for different types of portable devices that use these common battery chemistries.
### 2.3 Safety Features
- Safety is a top priority in battery charging applications, and the BQ24155RGY series is equipped with a comprehensive set of safety features. It has over - voltage protection (OVP) to prevent the battery from being charged with an excessive voltage, which could cause damage to the battery or even pose a safety hazard.
- Over - current protection (OCP) is also implemented to limit the charging current to a safe level. In case of a short - circuit or other abnormal conditions, the OCP feature will quickly cut off the charging current to protect the charger and the battery.
- Thermal protection is another important safety measure. The device monitors its own temperature and the battery's temperature during the charging process. If the temperature exceeds a safe threshold, it will reduce the charging current or even stop the charging process to prevent overheating.
### 2.4 Integration and Compact Design
- The BQ24155RGY is highly integrated, which means it combines multiple functions into a single chip. This reduces the need for external components, simplifies the circuit design, and saves board space. The compact design makes it ideal for use in small - form - factor portable devices where space is at a premium.
- It also features a small - package size, such as the VQFN package, which further contributes to its suitability for compact device designs.
## 3. Functional Block Diagram and Working Principle
### 3.1 Input Stage
The input stage of the BQ24155RGY is responsible for receiving the input power from the power source. It includes an input voltage regulator that can handle the wide input voltage range mentioned earlier. The input stage
Images for reference
14-PVQFN
Image Preview
Image Preview