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SG2844Y

Manufacturer: 0, LINFINITY

CURRENT MODE PWM CONTROLLER

Partnumber Manufacturer Quantity Availability
SG2844Y 0, LINFINITY 336 In Stock

Description and Introduction

CURRENT MODE PWM CONTROLLER The part **SG2844Y** is a **PWM (Pulse Width Modulation) controller IC** commonly used in power supply applications. Below are its specifications, descriptions, and features based on available information:  

### **Specifications:**  
- **Manufacturer:** ON Semiconductor (formerly part of Motorola Semiconductor)  
- **Type:** Current Mode PWM Controller  
- **Operating Voltage Range:** 8.5V to 30V  
- **Output Frequency:** Up to 500 kHz (adjustable)  
- **Duty Cycle Range:** 0% to 100%  
- **Output Current (Source/Sink):** 1A (peak)  
- **Reference Voltage:** 5.1V (internal bandgap)  
- **Operating Temperature Range:** -40°C to +85°C  
- **Package:** 8-Pin DIP or SOIC  

### **Descriptions:**  
The **SG2844Y** is a high-performance PWM controller designed for DC-DC converters and offline power supplies. It operates in **current-mode control**, providing improved loop response and simplified feedback compensation. The IC includes features like **soft-start, undervoltage lockout (UVLO), and cycle-by-cycle current limiting** for robust power supply designs.  

### **Features:**  
- **Current-Mode Control** for enhanced transient response  
- **Programmable Oscillator Frequency** (external RT/CT components)  
- **Precision 5.1V Reference** (±1% tolerance)  
- **Soft-Start Function** for controlled startup  
- **Undervoltage Lockout (UVLO)** for protection  
- **Pulse-by-Pulse Current Limiting**  
- **Totem Pole Output** for driving power MOSFETs  
- **Low Startup Current** (~0.5mA typical)  

This IC is widely used in **switching power supplies, battery chargers, and industrial power systems**. For exact application details, refer to the official datasheet.

Application Scenarios & Design Considerations

CURRENT MODE PWM CONTROLLER

Alternative Part Number

  • UC2844N --: Pin-compatible current-mode PWM controller in the same 2844 family with equivalent functionality and widely available.
  • TL2844P --: Direct functional equivalent current-mode PWM controller with similar UVLO thresholds and drive capability.
  • MC2844P --: Alternate-source current-mode PWM controller offering comparable performance for offline converter designs.
  • SG3844N --: Current-mode PWM controller from the 3844 series offering comparable electrical characteristics and DIP-8 package for the same application.

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