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SG3842M from SG

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SG3842M

Manufacturer: SG, LINFINI, LINFINITY, LINFINTY, LINFIN, LINFITY, MSC

CURRENT MODE PWM CONTROLLER

Partnumber Manufacturer Quantity Availability
SG3842M SG, LINFINI, LINFINITY, LINFINTY, LINFIN, LINFITY, MSC 5585 In Stock

Description and Introduction

CURRENT MODE PWM CONTROLLER The SG3842M is a pulse width modulation (PWM) controller IC manufactured by MSC (Microelectronics Semiconductor Corporation). Below are the factual specifications, descriptions, and features from Ic-phoenix technical data files:

### **Specifications:**  
- **Manufacturer:** MSC (Microelectronics Semiconductor Corporation)  
- **Type:** Current-mode PWM Controller  
- **Package:** 8-Pin DIP or SOIC  
- **Operating Voltage Range:** 8V to 30V  
- **Output Drive Current:** 200mA (peak)  
- **Switching Frequency:** Up to 500kHz (adjustable with external components)  
- **Duty Cycle Range:** 0% to 100%  
- **Reference Voltage:** 5V (±1%)  
- **Operating Temperature Range:** -40°C to +85°C  

### **Descriptions:**  
- The SG3842M is a fixed-frequency current-mode PWM controller designed for DC-DC converter and power supply applications.  
- It provides precise control over output voltage regulation with features like under-voltage lockout (UVLO), cycle-by-cycle current limiting, and soft-start capability.  
- The IC is commonly used in switch-mode power supplies (SMPS), battery chargers, and inverter circuits.  

### **Features:**  
- **Current-Mode Operation:** Enhances loop response and simplifies feedback compensation.  
- **Under-Voltage Lockout (UVLO):** Ensures proper operation by disabling output below a minimum supply voltage.  
- **Soft-Start Function:** Reduces inrush current during startup.  
- **Adjustable Oscillator Frequency:** Set via external resistor and capacitor.  
- **Error Amplifier:** Provides stable feedback control.  
- **Pulse-by-Pulse Current Limiting:** Protects against overload conditions.  
- **Totem Pole Output:** Suitable for driving power MOSFETs or IGBTs.  

This information is based solely on the available knowledge base for the SG3842M by MSC.

Application Scenarios & Design Considerations

CURRENT MODE PWM CONTROLLER

Alternative Part Number

  • UC3842AN --: Industry-standard current-mode PWM controller in the same family, widely available and pin-compatible with SG3842 in most DIP-8 designs.
  • KA3842A --: Direct functional equivalent current-mode PWM controller with similar UVLO and drive characteristics, commonly used as a drop-in replacement.
  • TL3842P --: Alternative 3842-series PWM controller with comparable electrical specifications, suitable for offline flyback and forward converter designs.

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