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UC3842T from ST,ST Microelectronics

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UC3842T

Manufacturer: ST

HIGH PERFORMANCE CURRENT MODE PWM CONTROLLER

Partnumber Manufacturer Quantity Availability
UC3842T ST 56 In Stock

Description and Introduction

HIGH PERFORMANCE CURRENT MODE PWM CONTROLLER The UC3842T is a high-performance current-mode PWM controller manufactured by STMicroelectronics (ST). Below are the factual specifications, descriptions, and features from Ic-phoenix technical data files:

### **Specifications:**  
- **Manufacturer:** STMicroelectronics (ST)  
- **Type:** Current-Mode PWM Controller  
- **Topology:** Flyback, Forward, Boost, Buck  
- **Operating Frequency:** Up to 500 kHz  
- **Output Drive Current:** ±1 A (Peak)  
- **Input Voltage (VCC):** 16V (Max)  
- **Start-Up Current:** <1 mA  
- **Duty Cycle Range:** 0% to 100% (Adjustable)  
- **Reference Voltage:** 5V (±1% Tolerance)  
- **Error Amplifier Bandwidth:** 1 MHz  
- **Operating Temperature Range:** -40°C to +85°C  
- **Package:** TO-220-8 (Through-Hole)  

### **Descriptions:**  
The UC3842T is a fixed-frequency pulse-width modulation (PWM) controller designed for DC-DC converter and offline power supply applications. It features high current drive capability, precise duty cycle control, and a built-in under-voltage lockout (UVLO) function.  

### **Features:**  
- **Current-Mode Operation:** Provides cycle-by-cycle current limiting.  
- **Under-Voltage Lockout (UVLO):** Ensures proper start-up and shutdown.  
- **Trimmed Oscillator Discharge Current:** Enhances frequency stability.  
- **Automatic Feed-Forward Compensation:** Improves line regulation.  
- **Latching PWM for Cycle-by-Cycle Limiting:** Prevents multiple pulses.  
- **High-Current Totem Pole Output:** Directly drives power MOSFETs.  
- **Low Start-Up and Operating Current:** Improves efficiency.  
- **Internal Reference Voltage:** 5V with ±1% accuracy.  

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

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