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UC3844D8TR from TI,Texas Instruments

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4.028ms

UC3844D8TR

Manufacturer: TI

Current-Mode PWM Controller

Partnumber Manufacturer Quantity Availability
UC3844D8TR TI 25000 In Stock

Description and Introduction

Current-Mode PWM Controller The UC3844D8TR is a current-mode PWM controller manufactured by Texas Instruments (TI).  

### **Specifications:**  
- **Topology:** Current-mode PWM controller  
- **Input Voltage (VCC):** 7.6V to 30V (start-up), 8.4V to 30V (operating)  
- **Output Frequency:** Up to 500kHz  
- **Duty Cycle:** 0% to 50% (adjustable)  
- **Output Drive Current:** ±1A (peak)  
- **Reference Voltage:** 5V (±1% accuracy)  
- **Operating Temperature Range:** -40°C to +85°C  
- **Package:** SOIC-8  

### **Descriptions:**  
The UC3844D8TR is designed for DC-DC converter applications, providing precise control over switching power supplies. It features a fixed-frequency oscillator, error amplifier, current sensing comparator, and a totem-pole output stage for driving power MOSFETs.  

### **Features:**  
- **Current-Mode Operation:** Ensures cycle-by-cycle current limiting.  
- **Under-Voltage Lockout (UVLO):** Ensures proper start-up and shutdown.  
- **Adjustable Oscillator Frequency:** Set using external components.  
- **Soft-Start Capability:** Reduces inrush current during start-up.  
- **High-Current Totem-Pole Output:** Directly drives power MOSFETs.  
- **Low Start-Up Current:** Typically 0.5mA.  

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

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