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UC3842N

SMPS Controller

Partnumber Manufacturer Quantity Availability
UC3842N 3450 In Stock

Description and Introduction

SMPS Controller The UC3842N is a high-performance current-mode PWM controller manufactured by Texas Instruments and other semiconductor companies.  

### **Specifications:**  
- **Input Voltage Range:** 8V to 30V (operating), up to 36V (absolute max)  
- **Output Frequency:** Up to 500 kHz (adjustable with external components)  
- **Duty Cycle Range:** 0% to 100% (adjustable)  
- **Output Current:** 1A (peak)  
- **Reference Voltage:** 5V (±1% accuracy)  
- **Operating Temperature Range:** -40°C to +85°C  
- **Package:** 8-Pin DIP or SOIC  

### **Descriptions:**  
- The UC3842N is a fixed-frequency PWM controller designed for DC-DC converter applications.  
- It features current-mode control for improved loop response and simplified compensation.  
- Includes under-voltage lockout (UVLO) protection with hysteresis.  
- Suitable for flyback, forward, and boost converter topologies.  

### **Features:**  
- **Current-Mode Control:** Enhances transient response and simplifies feedback loop design.  
- **Under-Voltage Lockout (UVLO):** Ensures proper operation within the specified voltage range.  
- **Adjustable Oscillator Frequency:** Set via external resistor and capacitor.  
- **Precision Reference Voltage:** 5V (±1%) for stable feedback control.  
- **High-Current Totem Pole Output:** Directly drives power MOSFETs.  
- **Low Startup Current:** Typically 1mA, reducing power consumption.  

This information is based on the manufacturer's datasheet. For detailed application notes, refer to the official documentation.

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