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UC3844BVN from ON,ON Semiconductor

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UC3844BVN

Manufacturer: ON

High Performance Current Mode Controller

Partnumber Manufacturer Quantity Availability
UC3844BVN ON 139 In Stock

Description and Introduction

High Performance Current Mode Controller The UC3844BVN is a high-performance current-mode PWM controller manufactured by ON Semiconductor.  

### **Specifications:**  
- **Input Voltage (VCC):** 16V (max)  
- **Output Voltage:** Adjustable via external components  
- **Operating Frequency:** Up to 500kHz  
- **Duty Cycle:** 0% to 100% (adjustable)  
- **Output Current (Source/Sink):** ±1A (peak)  
- **Reference Voltage:** 5V (±1% tolerance)  
- **Start-Up Current:** <1mA  
- **Operating Temperature Range:** -40°C to +85°C  
- **Package:** 8-Pin DIP or SOIC  

### **Descriptions:**  
The UC3844BVN is a fixed-frequency PWM controller optimized for DC-DC converter applications. It features current-mode control for improved loop response and includes an internal oscillator, error amplifier, and a high-current totem-pole output for driving power MOSFETs.  

### **Features:**  
- **Current-Mode Operation:** Provides cycle-by-cycle current limiting.  
- **Under-Voltage Lockout (UVLO):** Ensures proper start-up and shutdown.  
- **Precision Reference:** 5V with tight tolerance (±1%).  
- **Adjustable Oscillator Frequency:** Set by external timing components.  
- **Soft-Start Capability:** Reduces inrush current.  
- **High-Current Output:** Directly drives power MOSFETs.  
- **Low Start-Up Current:** Enables efficient power-up.  

This device is commonly used in offline and DC-DC power supplies, battery chargers, and SMPS (Switched-Mode Power Supply) applications.

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