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UC3855ADW from TI/BB,Texas Instruments

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UC3855ADW

Manufacturer: TI/BB

High Performance Power Factor Preregulator

Partnumber Manufacturer Quantity Availability
UC3855ADW TI/BB 25 In Stock

Description and Introduction

High Performance Power Factor Preregulator The UC3855ADW is a high-performance power factor correction (PFC) controller manufactured by Texas Instruments (TI)/Burr-Brown (BB).  

### **Specifications:**  
- **Input Voltage Range:** Up to 600V  
- **Operating Frequency:** Up to 250kHz  
- **Supply Voltage (VCC):** 15V to 35V  
- **Output Drive Current:** ±1.5A peak  
- **Power Factor:** >0.99  
- **Total Harmonic Distortion (THD):** <5%  
- **Package:** SOIC-16 (DW)  

### **Descriptions:**  
The UC3855ADW is designed for boost-type power factor correction circuits in AC/DC power supplies. It provides near-unity power factor and low harmonic distortion by controlling the input current waveform to follow the input voltage.  

### **Features:**  
- **Average Current Mode Control:** Ensures low distortion and high power factor.  
- **Programmable Switching Frequency:** Adjustable up to 250kHz.  
- **Overvoltage Protection:** Prevents output overvoltage conditions.  
- **Soft-Start Function:** Reduces inrush current during startup.  
- **Low Startup Current:** Typically 150µA.  
- **Precision Reference Voltage:** 7.5V with ±1% accuracy.  
- **Multiplier/Divider Circuit:** Ensures proper current shaping.  

This IC is commonly used in applications such as power supplies, LED drivers, and industrial equipment requiring power factor correction.

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