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UC3842AN from TEXAS

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UC3842AN

Manufacturer: TEXAS

SMPS Controller

Partnumber Manufacturer Quantity Availability
UC3842AN TEXAS 114 In Stock

Description and Introduction

SMPS Controller The UC3842AN is a high-performance current-mode PWM controller manufactured by Texas Instruments (TEXAS). Below are its key specifications, descriptions, and features:

### **Specifications:**  
- **Input Voltage (VCC):** 16V (typical)  
- **Output Current (Peak):** ±1A  
- **Operating Frequency:** Up to 500kHz  
- **Duty Cycle Range:** 0% to 100%  
- **Reference Voltage (VREF):** 5V ±1%  
- **Error Amp Bandwidth:** 1MHz  
- **Start-Up Current:** <1mA  
- **UVLO (Undervoltage Lockout):** On: 16V (typ), Off: 10V (typ)  
- **Package:** 8-Pin DIP (Dual In-line Package)  

### **Descriptions:**  
- The UC3842AN is a fixed-frequency pulse-width modulation (PWM) controller optimized for DC-DC converter applications.  
- It operates in current-mode control, providing improved loop response and simplified compensation.  
- Includes a trimmed oscillator, precision reference, high-gain error amplifier, current sensing comparator, and a totem-pole output driver.  

### **Features:**  
- **Current-Mode Operation:** Enhances line and load regulation.  
- **Automatic Feed-Forward Compensation:** Simplifies feedback loop design.  
- **Pulse-by-Pulse Current Limiting:** Protects against overcurrent conditions.  
- **Undervoltage Lockout (UVLO):** Ensures proper start-up and shutdown.  
- **Trimmed Oscillator:** Precise frequency control.  
- **High-Current Totem-Pole Output:** Directly drives power MOSFETs.  
- **Low Start-Up and Operating Current:** Improves efficiency.  

The UC3842AN is widely used in offline and DC-DC power supplies, battery chargers, and SMPS (Switched-Mode Power Supply) applications.

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