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UC2855BN from UC

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UC2855BN

Manufacturer: UC

High Performance Power Factor Preregulator

Partnumber Manufacturer Quantity Availability
UC2855BN UC 202 In Stock

Description and Introduction

High Performance Power Factor Preregulator The UC2855BN is a high-performance, current-mode PWM controller manufactured by Texas Instruments.  

### **Key Specifications:**  
- **Input Voltage Range:** Up to 35V  
- **Operating Frequency:** Adjustable up to 1MHz  
- **Output Current (Source/Sink):** 1A (Peak)  
- **Duty Cycle Range:** 0% to 100%  
- **Error Amplifier Bandwidth:** 5MHz  
- **Start-Up Current:** 0.5mA (Typical)  
- **Operating Temperature Range:** -40°C to +85°C  
- **Package:** 16-Pin PDIP (Plastic Dual In-Line Package)  

### **Descriptions and Features:**  
- **Current-Mode Control:** Provides improved transient response and simplified loop compensation.  
- **Programmable Soft-Start:** Reduces inrush current during startup.  
- **Undervoltage Lockout (UVLO):** Ensures proper operation under low input voltage conditions.  
- **Synchronizable Oscillator:** Allows synchronization with an external clock.  
- **High-Current Totem-Pole Output:** Directly drives power MOSFETs.  
- **Precision Reference Voltage:** 5.1V ±1% accuracy.  
- **Leading-Edge Blanking:** Improves noise immunity in current sensing.  

The UC2855BN is commonly used in switch-mode power supplies (SMPS), DC-DC converters, and offline power applications.

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