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UC2854DWTR from TI,Texas Instruments

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UC2854DWTR

Manufacturer: TI

High Power Factor Preregulator

Partnumber Manufacturer Quantity Availability
UC2854DWTR TI 1830 In Stock

Description and Introduction

High Power Factor Preregulator The UC2854DWTR is a high-performance current-mode PWM controller manufactured by Texas Instruments (TI).  

### **Specifications:**  
- **Topology:** Current-mode PWM controller  
- **Input Voltage Range:** 15V (start-up), 10V (operating)  
- **Output Drive Current:** 1A (peak)  
- **Switching Frequency:** Up to 1MHz  
- **Duty Cycle Range:** 0% to 100%  
- **Error Amplifier Bandwidth:** 3MHz  
- **Operating Temperature Range:** -40°C to +85°C  
- **Package:** SOIC-16 (DW)  

### **Descriptions:**  
The UC2854DWTR is designed for high-efficiency power supply applications, offering precise regulation and robust performance. It includes features like soft-start, cycle-by-cycle current limiting, and undervoltage lockout (UVLO).  

### **Features:**  
- **Current-Mode Control:** Ensures fast transient response and simplified loop compensation.  
- **Programmable Soft-Start:** Reduces inrush current during startup.  
- **Undervoltage Lockout (UVLO):** Ensures proper operation within voltage limits.  
- **High-Current Totem-Pole Output:** Directly drives power MOSFETs.  
- **Cycle-by-Cycle Current Limiting:** Protects against overloads.  
- **Wide Operating Frequency Range:** Suitable for various applications.  

This controller is commonly used in AC/DC converters, offline power supplies, and DC/DC converters.

Partnumber Manufacturer Quantity Availability
UC2854DWTR UCC 12 In Stock

Description and Introduction

High Power Factor Preregulator The UC2854DWTR is a high-performance current-mode PWM controller manufactured by Texas Instruments (UCC).  

### **Key Specifications:**  
- **Input Voltage Range:** Up to 35V  
- **Operating Frequency:** Adjustable up to 1MHz  
- **Output Drive Current:** ±2A (peak)  
- **Duty Cycle Range:** 0% to 100%  
- **Error Amplifier Bandwidth:** 5MHz  
- **Soft-Start Capability:** Adjustable  
- **Undervoltage Lockout (UVLO):** Adjustable  
- **Package:** SOIC-16 (DW)  

### **Descriptions and Features:**  
- **Current-Mode Control:** Enhances loop response and simplifies compensation.  
- **Programmable Oscillator:** Allows flexible frequency setting with external components.  
- **Precision Reference:** 5V ±1% trimmed bandgap reference.  
- **Synchronous Capability:** Supports external clock synchronization.  
- **Protection Features:** Includes cycle-by-cycle current limiting and hiccup-mode fault protection.  
- **High-Speed Operation:** Optimized for high-frequency switching power supplies.  
- **Wide Temperature Range:** Operates from -40°C to +85°C.  

This IC is commonly used in AC/DC and DC/DC power supplies, telecom systems, and industrial applications.

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