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SG2842M from SMC/LINFINIT

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SG2842M

Manufacturer: SMC/LINFINIT, MSC, LINFINITY

CURRENT MODE PWM CONTROLLER

Partnumber Manufacturer Quantity Availability
SG2842M SMC/LINFINIT, MSC, LINFINITY 2669 In Stock

Description and Introduction

CURRENT MODE PWM CONTROLLER Part **SG2842M** is a **PWM (Pulse Width Modulation) Controller IC** commonly used in power supply applications. Below are its key specifications, descriptions, and features:  

### **Manufacturer:**  
- **ON Semiconductor** (formerly part of Motorola and Fairchild Semiconductor).  

### **Specifications:**  
- **Type:** Current Mode PWM Controller  
- **Operating Frequency:** Up to **500 kHz**  
- **Input Voltage Range:** **8V to 30V** (for VCC)  
- **Output Duty Cycle:** Adjustable, typically **0% to 50%** (maximum)  
- **Output Current (Source/Sink):** **±200 mA** (peak)  
- **Reference Voltage:** **5V ±1%** (precision internal reference)  
- **Operating Temperature Range:** **-25°C to +85°C** (industrial-grade)  
- **Package:** **8-Pin DIP (Dual Inline Package) or SOIC**  

### **Descriptions:**  
- Designed for **offline and DC-DC converter** applications.  
- Features **current-mode control** for improved loop response and simplified compensation.  
- Includes **soft-start, undervoltage lockout (UVLO), and cycle-by-cycle current limiting** for protection.  
- Suitable for **flyback, forward, and boost converter** topologies.  

### **Key Features:**  
- **Current-Mode Operation** for enhanced transient response.  
- **Programmable Oscillator Frequency** with external resistor/capacitor (RT/CT).  
- **Under-Voltage Lockout (UVLO)** ensures safe startup and shutdown.  
- **Soft-Start Function** to reduce inrush current.  
- **Error Amplifier with Precise 5V Reference** for feedback control.  
- **Totem Pole Output** for driving power MOSFETs or IGBTs.  

This IC is widely used in **switching power supplies, battery chargers, and industrial power systems**.  

Let me know if you need further details.

Application Scenarios & Design Considerations

CURRENT MODE PWM CONTROLLER

Alternative Part Number

  • UC2842AN --: Industry-standard current-mode PWM controller in the same family, widely available and pin-compatible with SG2842M.
  • TL2842P --: Direct functional equivalent current-mode PWM controller with similar electrical characteristics and DIP package.
  • MC2842P --: Alternative current-mode PWM controller offering comparable performance for offline converter applications.
  • KA3842A --: Low-cost current-mode PWM controller with equivalent control scheme and ratings, commonly used as a substitute in power supply designs.
  • UC3842AN --: Very common current-mode PWM controller with similar electrical characteristics and pinout, easy to source as a drop-in replacement.
  • SG3842M --: Equivalent current-mode PWM controller from the same original manufacturer family, matching the SG2842M specifications and package.

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