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UC3843ADTR from TI,Texas Instruments

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UC3843ADTR

Manufacturer: TI

Current Mode PWM Controller

Partnumber Manufacturer Quantity Availability
UC3843ADTR TI 5000 In Stock

Description and Introduction

Current Mode PWM Controller The UC3843ADTR is a current-mode PWM controller manufactured by Texas Instruments (TI).  

### **Specifications:**  
- **Topology:** Current-mode PWM controller  
- **Output Configuration:** Single-ended  
- **Output Type:** Transistor Driver  
- **Switching Frequency:** Up to 500 kHz  
- **Duty Cycle Max:** 100%  
- **Supply Voltage (Vcc):** 8.5V to 30V  
- **Operating Temperature Range:** -40°C to +85°C  
- **Package:** SOIC-8 (DTR)  

### **Descriptions:**  
The UC3843ADTR is designed for DC-DC converter applications, providing precise control for switching power supplies. It features an oscillator, error amplifier, current sensing comparator, and a high-current totem-pole output for driving power MOSFETs.  

### **Features:**  
- **Current-Mode Operation:** Improves loop response and simplifies compensation.  
- **Automatic Feed-Forward Compensation:** Enhances line regulation.  
- **Latching PWM:** Ensures single-pulse operation per cycle.  
- **Undervoltage Lockout (UVLO):** Ensures proper startup and shutdown.  
- **High-Current Totem-Pole Output:** Directly drives power MOSFETs.  
- **Low Startup Current:** Typically 0.5 mA.  
- **Cycle-by-Cycle Current Limiting:** Provides overload protection.  

This device is commonly used in offline and DC-DC converters, battery chargers, and power supply applications.

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