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L4981A. from ST,ST Microelectronics

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L4981A.

Manufacturer: ST

POWER FACTOR CORRECTOR

Partnumber Manufacturer Quantity Availability
L4981A.,L4981A ST 17 In Stock

Description and Introduction

POWER FACTOR CORRECTOR The L4981A is a high-voltage double-ended controller designed for resonant half-bridge topologies. It is manufactured by STMicroelectronics (ST).  

### **Key Specifications:**  
- **Input Voltage Range:** Up to 600V  
- **Operating Frequency Range:** Adjustable (typically up to several hundred kHz)  
- **Driver Output Current:** ±500mA (source/sink)  
- **Dead-Time Control:** Adjustable to prevent shoot-through  
- **Soft-Start Function:** Reduces inrush current  
- **Protection Features:**  
  - Undervoltage Lockout (UVLO)  
  - Overcurrent Protection (OCP)  
  - Overvoltage Protection (OVP)  
  - Thermal Shutdown  

### **Descriptions and Features:**  
- Designed for **resonant converters** (LLC, ZVS, etc.)  
- **Half-Bridge Driver:** Includes high-side and low-side gate drivers with bootstrap support  
- **Adjustable Frequency:** Allows optimization for efficiency and power delivery  
- **Precise Dead-Time Management:** Ensures safe switching transitions  
- **Low-Power Consumption:** Suitable for energy-efficient applications  
- **Package Options:** Typically available in **SO-16 or similar packages**  

The L4981A is commonly used in **AC-DC power supplies, LED drivers, and industrial power systems** requiring high-voltage operation and resonant control.  

Would you like additional details on pin configurations or application notes?

Application Scenarios & Design Considerations

POWER FACTOR CORRECTOR

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