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UC3842D8TR from TI,Texas Instruments

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24.048ms

UC3842D8TR

Manufacturer: TI

Current-Mode PWM Controller

Partnumber Manufacturer Quantity Availability
UC3842D8TR TI 25000 In Stock

Description and Introduction

Current-Mode PWM Controller The UC3842D8TR is a current-mode PWM controller manufactured by Texas Instruments (TI).  

### **Specifications:**  
- **Input Voltage Range:** 16V to 30V (start-up), 10V to 30V (operating)  
- **Output Voltage:** Adjustable via external components  
- **Switching Frequency:** Up to 500 kHz  
- **Output Current:** 200 mA (source/sink)  
- **Duty Cycle Range:** 0% to 100%  
- **Error Amplifier Bandwidth:** 1 MHz  
- **Operating Temperature Range:** -40°C to +85°C  
- **Package:** SOIC-8  

### **Descriptions:**  
The UC3842D8TR is a high-performance fixed-frequency current-mode PWM controller designed for DC-DC converter applications. It provides precise control for power supply regulation with features like under-voltage lockout (UVLO), cycle-by-cycle current limiting, and a trimmed oscillator for accurate frequency control.  

### **Features:**  
- **Current-Mode Control:** Improves loop response and simplifies compensation.  
- **Under-Voltage Lockout (UVLO):** Ensures proper start-up and shutdown.  
- **Trimmed Oscillator:** Provides precise frequency control.  
- **High-Current Totem Pole Output:** Directly drives power MOSFETs.  
- **Internal Reference Voltage:** 5V with ±1% tolerance.  
- **Soft-Start Capability:** Reduces inrush current.  
- **Low Start-Up Current:** Typically 1 mA.  

This PWM controller is commonly used in offline and DC-DC power supplies, battery chargers, and flyback converters.

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