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UC3854DW from UNITRODE

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UC3854DW

Manufacturer: UNITRODE

High Power Factor Preregulator

Partnumber Manufacturer Quantity Availability
UC3854DW UNITRODE 1449 In Stock

Description and Introduction

High Power Factor Preregulator The UC3854DW is a high-performance power factor correction (PFC) controller manufactured by UNITRODE. Below are its key specifications, descriptions, and features:

### **Specifications:**  
- **Input Voltage Range:** 10V to 17V (operating)  
- **Output Current:** 1.5A (peak gate drive)  
- **Switching Frequency:** Adjustable up to 250kHz  
- **Operating Temperature Range:** -40°C to +85°C  
- **Package:** 16-pin SOIC (DW)  

### **Descriptions:**  
- Designed for boost-type power factor correction circuits.  
- Implements average current-mode control for improved power factor and low distortion.  
- Includes a precision multiplier/divider for accurate current shaping.  

### **Features:**  
- **Average Current Mode Control:** Ensures low harmonic distortion.  
- **Programmable Oscillator:** Adjustable switching frequency.  
- **Undervoltage Lockout (UVLO):** Ensures proper startup and shutdown.  
- **Soft-Start Function:** Reduces inrush current.  
- **Overvoltage Protection:** Safeguards against output overvoltage.  
- **Zero-Current Detection:** Optimizes efficiency at light loads.  

This IC is widely used in AC-DC power supplies to comply with power quality standards.

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