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UCC3858N from U (unitrode)

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UCC3858N

Manufacturer: U (unitrode)

HIGH EFFICIENCY, HIGH POWER FACTOR PREREGULATOR

Partnumber Manufacturer Quantity Availability
UCC3858N U (unitrode) 121 In Stock

Description and Introduction

HIGH EFFICIENCY, HIGH POWER FACTOR PREREGULATOR The UCC3858N is a power factor correction (PFC) controller manufactured by Unitrode (now part of Texas Instruments). Below are its specifications, descriptions, and features based on factual information:

### **Specifications:**  
- **Manufacturer:** Unitrode (U)  
- **Type:** Power Factor Correction (PFC) Controller  
- **Operating Voltage Range:** Typically 12V to 18V (with UVLO protection)  
- **Switching Frequency:** Adjustable, typically up to 250kHz  
- **Control Method:** Average current mode control  
- **Package:** 16-Pin PDIP (Plastic Dual In-Line Package)  
- **Operating Temperature Range:** -40°C to +85°C  

### **Descriptions:**  
- The UCC3858N is designed for high-performance power factor correction in AC-DC power supplies.  
- It implements average current mode control to achieve near-unity power factor.  
- Suitable for boost converter topologies in PFC applications.  

### **Features:**  
- **Power Factor Correction:** Ensures compliance with IEC 1000-3-2 standards.  
- **Average Current Mode Control:** Provides stable operation with low distortion.  
- **Programmable Oscillator:** Adjustable switching frequency for design flexibility.  
- **Undervoltage Lockout (UVLO):** Ensures proper startup and shutdown.  
- **Soft-Start Function:** Reduces inrush current during startup.  
- **Overvoltage Protection (OVP):** Protects against output overvoltage conditions.  
- **Current Limiting:** Prevents excessive current flow.  

This information is based solely on the manufacturer's datasheet and technical documentation.

Application Scenarios & Design Considerations

HIGH EFFICIENCY, HIGH POWER FACTOR PREREGULATOR
Partnumber Manufacturer Quantity Availability
UCC3858N UNITRODE 22 In Stock

Description and Introduction

HIGH EFFICIENCY, HIGH POWER FACTOR PREREGULATOR The UCC3858N is a Power Factor Correction (PFC) controller IC manufactured by UNITRODE.  

### **Specifications:**  
- **Topology:** Boost converter  
- **Control Method:** Average current mode control  
- **Operating Frequency:** Adjustable up to 250 kHz  
- **Input Voltage Range:** Wide range (suitable for universal AC line applications)  
- **Output Voltage Regulation:** Adjustable via feedback loop  
- **Supply Voltage (VCC):** Typically 12V to 18V  
- **Maximum Duty Cycle:** Limited by internal circuitry  
- **Current Sense Input:** Differential for accurate current measurement  
- **Package:** 16-Pin DIP (Dual In-line Package) or SOIC  

### **Descriptions and Features:**  
- Designed for high-performance power factor correction in AC/DC power supplies.  
- Implements average current mode control for low distortion and high power factor.  
- Includes an internal multiplier for input current shaping.  
- Features a precision voltage reference for accurate output regulation.  
- Provides overvoltage protection (OVP) and undervoltage lockout (UVLO).  
- Includes a soft-start function to reduce inrush current.  
- Optimized for low harmonic distortion and compliance with IEC 1000-3-2 standards.  

This IC is commonly used in offline power supplies, industrial systems, and other applications requiring power factor correction.

Application Scenarios & Design Considerations

HIGH EFFICIENCY, HIGH POWER FACTOR PREREGULATOR

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