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UC3844A from FAIR,Fairchild Semiconductor

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UC3844A

Manufacturer: FAIR

HIGH PERFORMANCE CURRENT MODE PWM CONTROLLER

Partnumber Manufacturer Quantity Availability
UC3844A FAIR 109 In Stock

Description and Introduction

HIGH PERFORMANCE CURRENT MODE PWM CONTROLLER The UC3844A is a high-performance current-mode PWM controller manufactured by Fairchild Semiconductor (now part of ON Semiconductor).  

### **Specifications:**  
- **Input Voltage Range:** 8V to 30V  
- **Operating Frequency:** Up to 500kHz  
- **Output Duty Cycle:** 0% to 100%  
- **Output Current (Peak):** 1A (sink/source)  
- **Reference Voltage:** 5V (±1%)  
- **Low Startup Current:** <1mA  
- **Undervoltage Lockout (UVLO):** 7.6V (turn-on), 7.2V (turn-off)  
- **Current Sense Comparator:** Adjustable threshold  
- **Error Amplifier Bandwidth:** 1MHz  
- **Package Options:** DIP-8, SOIC-8  

### **Descriptions and Features:**  
- **Current-Mode Control:** Provides improved loop response and simplified compensation.  
- **Programmable Oscillator:** Allows frequency adjustment with external timing components.  
- **Pulse-by-Pulse Current Limiting:** Enhances system reliability.  
- **Soft-Start Capability:** Reduces inrush current during startup.  
- **High-Current Totem Pole Output:** Directly drives power MOSFETs.  
- **Latching PWM for Cycle-by-Cycle Control:** Ensures precise regulation.  
- **Low Power Consumption:** Suitable for energy-efficient designs.  

The UC3844A is commonly used in switch-mode power supplies (SMPS), DC-DC converters, and offline power applications.

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