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L4981BD
Product Overview
Category: Integrated Circuit (IC)
Use: Power Factor Correction (PFC) Controller
Characteristics: - High efficiency - Low standby power consumption - Wide input voltage range - Overvoltage protection - Overcurrent protection - Thermal shutdown protection
Package: SO-16
Essence: The L4981BD is a PFC controller IC designed for high-efficiency power factor correction in various applications.
Packaging/Quantity: The L4981BD is available in a standard SO-16 package. It is typically sold in reels of 2500 units.
Specifications
- Input Voltage Range: 85V to 265V AC
- Output Voltage Range: 400V to 800V DC
- Maximum Output Power: 300W
- Operating Frequency: 100kHz to 200kHz
- Standby Power Consumption: <500mW
- Operating Temperature Range: -40°C to 125°C
Pin Configuration
The L4981BD has 16 pins arranged as follows:
```
| | | 1 9 16 | | | | 2 8 15 | | | | 3 7 14 | | | | 4 6 13 | | | | 5 10 12 | |_______________| ```
Functional Features
- Power Factor Correction: The L4981BD provides active power factor correction, ensuring efficient utilization of electrical power and compliance with power quality standards.
- Overvoltage Protection: The IC monitors the output voltage and shuts down the power supply if it exceeds a predefined threshold, protecting the connected devices.
- Overcurrent Protection: The L4981BD incorporates overcurrent protection to prevent damage caused by excessive current flow.
- Thermal Shutdown Protection: In case of excessive temperature rise, the IC automatically shuts down to prevent overheating and potential damage.
Advantages and Disadvantages
Advantages: - High efficiency power factor correction - Wide input voltage range for versatile applications - Comprehensive protection features ensure safe operation - Low standby power consumption reduces energy waste
Disadvantages: - Limited maximum output power (300W) - Requires external components for complete power supply implementation
Working Principles
The L4981BD operates based on the Continuous Conduction Mode (CCM) boost converter topology. It uses a control algorithm to regulate the input current waveform, achieving high power factor correction and low harmonic distortion. By actively shaping the input current, it minimizes reactive power consumption and improves overall system efficiency.
Detailed Application Field Plans
The L4981BD is commonly used in various applications requiring power factor correction, such as: - Switching Power Supplies - LED Lighting Systems - Motor Drives - Industrial Equipment - Consumer Electronics
Detailed and Complete Alternative Models
- L6562A: PFC controller with similar specifications and features.
- UCC28070: PFC controller with higher maximum output power and additional protection features.
- FAN7527B: PFC controller with integrated MOSFET driver for simplified design.
These alternative models offer similar functionality and can be considered depending on specific application requirements.
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Enumere 10 preguntas y respuestas comunes relacionadas con la aplicación de L4981BD en soluciones técnicas
Sure! Here are 10 common questions and answers related to the application of L4981BD in technical solutions:
Q: What is L4981BD? A: L4981BD is a high-voltage resonant controller IC used for power factor correction (PFC) applications.
Q: What is the purpose of using L4981BD in technical solutions? A: L4981BD helps improve power efficiency, reduce harmonic distortion, and achieve power factor correction in various electronic devices.
Q: How does L4981BD achieve power factor correction? A: L4981BD uses a resonant converter topology that allows it to shape the input current waveform, reducing harmonics and improving power factor.
Q: What is the maximum voltage rating of L4981BD? A: The maximum voltage rating of L4981BD is typically around 700V.
Q: Can L4981BD be used in both single-phase and three-phase systems? A: Yes, L4981BD can be used in both single-phase and three-phase systems, depending on the specific application requirements.
Q: What are the typical output power levels supported by L4981BD? A: L4981BD can support output power levels ranging from a few watts to several kilowatts, making it suitable for a wide range of applications.
Q: Does L4981BD require an external MOSFET for operation? A: Yes, L4981BD requires an external MOSFET to function as a resonant power stage.
Q: Is L4981BD capable of providing overcurrent protection? A: Yes, L4981BD includes built-in overcurrent protection features to safeguard the system against excessive currents.
Q: Can L4981BD operate in continuous or discontinuous conduction mode? A: L4981BD can operate in both continuous and discontinuous conduction modes, depending on the load conditions.
Q: Are there any specific design considerations when using L4981BD in technical solutions? A: Yes, some design considerations include proper heat sinking, component selection, layout optimization, and ensuring compliance with safety standards and regulations.
Please note that these answers are general and may vary based on specific application requirements and datasheet specifications.