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UC3846N

SMPS Controller

Partnumber Manufacturer Quantity Availability
UC3846N 200 In Stock

Description and Introduction

SMPS Controller The UC3846N is a high-performance current-mode PWM controller manufactured by Texas Instruments.  

### **Specifications:**  
- **Input Voltage Range:** 8V to 40V  
- **Operating Frequency:** Up to 500kHz  
- **Output Current (Source/Sink):** 200mA (Peak)  
- **Duty Cycle Range:** 0% to 100%  
- **Error Amplifier Gain Bandwidth:** 1MHz  
- **Soft-Start Capability:** Yes  
- **Under-Voltage Lockout (UVLO):** Yes (Programmable)  
- **Package:** 16-Pin PDIP (Plastic Dual In-Line Package)  
- **Operating Temperature Range:** -40°C to +85°C  

### **Descriptions:**  
The UC3846N is a fixed-frequency pulse-width modulation (PWM) controller designed for high-performance power supply applications. It features current-mode control for improved loop response and includes a high-gain error amplifier, a current-sensing comparator, and a totem-pole output stage for driving power MOSFETs or IGBTs.  

### **Features:**  
- **Current-Mode Control:** Enhances transient response and simplifies loop compensation.  
- **Programmable Oscillator:** Allows flexible frequency adjustment.  
- **Synchronization Capability:** Can be synchronized to an external clock.  
- **Error Amplifier with High Gain Bandwidth:** Ensures precise voltage regulation.  
- **Pulse-by-Pulse Current Limiting:** Provides overcurrent protection.  
- **Soft-Start Function:** Prevents excessive inrush current at startup.  
- **Double-Pulse Suppression:** Prevents multiple pulses in a single switching cycle.  

This IC is commonly used in switch-mode power supplies (SMPS), DC-DC converters, and motor control applications.

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