UC3903DW
Quad voltage supervisor IC for power and line monitoring in SOIC package
Manufacturer： ['rochester', 'ti']
series introduction
# UC3903DW Product Series Introduction
## 1. Overview
The UC3903DW is a highly specialized and versatile integrated circuit product series designed for battery charging and management applications. It offers a comprehensive solution for ensuring efficient, safe, and reliable charging of various types of batteries, making it an ideal choice for a wide range of industries and electronic devices.
## 2. Key Features
### 2.1 Precise Charge Control
- **Three - Stage Charging Algorithm**: The UC3903DW implements a well - defined three - stage charging process, including bulk charge, absorption charge, and float charge. During the bulk charge stage, it delivers a high - current charge to quickly replenish the battery's energy. The absorption charge stage then maintains a constant voltage to fully charge the battery without overcharging. Finally, the float charge stage provides a low - level charge to keep the battery at full capacity and prevent self - discharge.
- **Accurate Voltage and Current Regulation**: It can precisely regulate the charging voltage and current, with a high degree of accuracy. This ensures that the battery is charged within its optimal parameters, extending the battery's lifespan and improving its performance. For example, it can maintain the charging voltage within a narrow tolerance range, typically within ±0.5% of the set value.
### 2.2 Battery Compatibility
- **Multiple Battery Types**: The UC3903DW is compatible with a variety of battery chemistries, such as lead - acid batteries (including flooded, sealed, and gel types). This wide compatibility makes it suitable for different applications, from small portable devices to large - scale industrial power systems.
- **Adjustable Parameters**: It allows for easy adjustment of charging parameters to accommodate different battery capacities and requirements. Users can set the charging voltage, current limits, and charge time according to the specific battery being charged.
### 2.3 Safety Features
- **Overcharge and Overcurrent Protection**: The product is equipped with built - in overcharge and overcurrent protection mechanisms. In case of an abnormal charging situation, such as a short - circuit or a malfunction in the charging circuit, it will automatically cut off the charging current to prevent damage to the battery and the charging system.
- **Thermal Protection**: It also has thermal protection capabilities. If the temperature of the battery or the charging circuit exceeds a safe operating range, the UC3903DW will adjust the charging current or shut down the charging process to avoid overheating and potential safety hazards.
### 2.4 Monitoring and Diagnostic Functions
- **Charge Status Indication**: The UC3903DW provides clear charge status indications, allowing users to easily monitor the charging progress of the battery. It can indicate whether the battery is in the bulk charge, absorption charge, or float charge stage, as well as whether the charging process is complete.
- **Fault Detection**: It can detect various faults in the charging system, such as open - circuit, short - circuit, and battery under - voltage conditions. When a fault is detected, it will trigger an alarm signal, enabling timely maintenance and troubleshooting.
## 3. Applications
### 3.1 Automotive and Marine
- **Automotive Batteries**: In automotive applications, the UC3903DW can be used to charge and maintain the vehicle's lead - acid battery. It ensures that the battery is always fully charged, which is crucial for reliable starting of the engine and proper operation of the vehicle's electrical systems.
- **Marine Batteries**: For marine vessels, where batteries are used to power various equipment such as navigation systems, lights, and pumps, the UC3903DW provides a reliable charging solution. It can withstand the harsh marine environment and ensure the long - term performance of the batteries.
### 3.2 Renewable Energy Systems
- **Solar Power
Images for reference
18-SOIC
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