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SI9111DJ

Manufacturer: VISHAY, SILICONIX

High-Voltage Switchmode Controllers

Partnumber Manufacturer Quantity Availability
SI9111DJ VISHAY, SILICONIX 742 In Stock

Description and Introduction

High-Voltage Switchmode Controllers The part **SI9111DJ** is manufactured by **Vishay**. Below are the specifications, descriptions, and features based on the available knowledge:

### **Specifications:**
- **Manufacturer:** Vishay  
- **Part Number:** SI9111DJ  
- **Category:** Power Management IC  
- **Type:** Switching Regulator Controller  
- **Topology:** Buck, Boost, Flyback  
- **Output Type:** Adjustable  
- **Output Voltage Range:** 1.25V to 40V  
- **Input Voltage Range:** 4.5V to 40V  
- **Switching Frequency:** Up to 500kHz  
- **Operating Temperature Range:** -40°C to +125°C  
- **Package:** SOIC-8  

### **Descriptions:**
The **SI9111DJ** is a high-performance PWM controller designed for DC-DC converter applications. It provides flexibility in designing buck, boost, or flyback converters with adjustable output voltage. The device operates over a wide input voltage range and supports high-frequency switching for efficient power conversion.

### **Features:**
- **Wide Input Voltage Range (4.5V to 40V)**  
- **Adjustable Output Voltage (1.25V to 40V)**  
- **High Switching Frequency (Up to 500kHz)**  
- **Precision Reference Voltage (1.25V ±1%)**  
- **Under-Voltage Lockout (UVLO) Protection**  
- **Current Limiting Protection**  
- **Thermal Shutdown Protection**  
- **SOIC-8 Package for Compact Designs**  

This information is strictly based on factual data from the manufacturer's documentation.

Application Scenarios & Design Considerations

High-Voltage Switchmode Controllers

Alternative Part Number

  • UC3842AN --: Industry-standard current-mode PWM controller in DIP-8, widely available and functionally similar to the SI9111DJ for offline flyback designs.
  • SG3524N --: Classic PWM controller in DIP-16 with dual outputs, easy drop-in for many small switching regulator applications.
  • MC34063AP --: Versatile DC-DC switching regulator controller in DIP-8, low cost and broadly stocked, suitable for simple buck/boost/inverting designs.

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