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UC3841J from UC

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UC3841J

Manufacturer: UC

Programmable, Off-Line, PWM Controller

Partnumber Manufacturer Quantity Availability
UC3841J UC 12 In Stock

Description and Introduction

Programmable, Off-Line, PWM Controller The UC3841J is a high-performance current-mode PWM controller manufactured by Texas Instruments. Below are its key specifications, descriptions, and features:

### **Specifications:**  
- **Input Voltage Range:** 8V to 30V  
- **Output Frequency Range:** Up to 500 kHz  
- **Maximum Duty Cycle:** 100%  
- **Output Current (Source/Sink):** 200 mA (peak)  
- **Operating Temperature Range:** -40°C to +85°C  
- **Package:** 8-Pin DIP (Dual In-Line Package)  

### **Descriptions:**  
- The UC3841J is a fixed-frequency pulse-width modulation (PWM) controller designed for DC-DC converter and power supply applications.  
- It operates in current-mode control, providing improved loop response and simplified feedback compensation.  
- The device includes an onboard oscillator, error amplifier, current sensing comparator, and a totem-pole output driver.  

### **Features:**  
- **Current-Mode Control:** Enhances transient response and simplifies loop compensation.  
- **Precision Reference:** Internal 5V bandgap reference with ±1% accuracy.  
- **Undervoltage Lockout (UVLO):** Ensures proper startup and shutdown behavior.  
- **Programmable Oscillator:** Allows frequency adjustment using external components.  
- **Soft-Start Capability:** Reduces inrush current during startup.  
- **High-Current Totem-Pole Output:** Directly drives power MOSFETs.  
- **Cycle-by-Cycle Current Limiting:** Protects against overload conditions.  

This information is based solely on the manufacturer's datasheet and technical documentation.

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