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UC3846 from FSC,Fairchild Semiconductor

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UC3846

Manufacturer: FSC

SMPS Controller

Partnumber Manufacturer Quantity Availability
UC3846 FSC 25 In Stock

Description and Introduction

SMPS Controller The UC3846 is a high-performance current-mode PWM controller manufactured by Texas Instruments (formerly Unitrode). Here are the factual specifications, descriptions, and features from Ic-phoenix technical data files:

### **Manufacturer:**  
- **FSC (Formerly Unitrode, now part of Texas Instruments)**  

### **Specifications:**  
- **Topology:** Current-mode PWM controller  
- **Operating Frequency:** Up to 500 kHz  
- **Supply Voltage Range:** 8V to 40V  
- **Output Current (Peak):** 500 mA (sink/source)  
- **Duty Cycle Range:** 0% to 100%  
- **Error Amplifier Bandwidth:** 5 MHz  
- **Current Sense Comparator Response Time:** 100 ns  
- **Operating Temperature Range:** -40°C to +85°C  

### **Descriptions:**  
- The UC3846 is designed for high-frequency switching power supply applications.  
- It provides precise control of output voltage and current in power converters.  
- Features include cycle-by-cycle current limiting, soft-start capability, and shutdown control.  

### **Features:**  
- **Current-Mode Control:** Improves loop response and simplifies compensation.  
- **Programmable Oscillator:** Allows flexible frequency setting with external components.  
- **Synchronization Capability:** Can sync with an external clock.  
- **Under-Voltage Lockout (UVLO):** Ensures proper startup and shutdown.  
- **Dual Alternating Outputs:** Suitable for push-pull and full-bridge topologies.  
- **Error Amplifier:** High-gain, wide-bandwidth for tight regulation.  
- **Shutdown Pin:** Allows external fault protection.  

This information is based on the official datasheet and manufacturer documentation.

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