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STR-A6251 from SK

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STR-A6251

Manufacturer: SK, SANKEN

Universal-Input/15 W 50 kHz Flyback Switching Regulators

Partnumber Manufacturer Quantity Availability
STR-A6251,STRA6251 SK, SANKEN 5940 In Stock

Description and Introduction

Universal-Input/15 W 50 kHz Flyback Switching Regulators **Manufacturer:** SANKEN  
**Part Number:** STR-A6251  

### **Specifications:**  
- **Type:** Switching Power Supply IC  
- **Input Voltage Range:** 85V AC to 265V AC  
- **Output Power:** Up to 15W (depending on design)  
- **Switching Frequency:** Approximately 60kHz  
- **Standby Power Consumption:** Low (typically <100mW)  
- **Operating Temperature Range:** -20°C to +85°C  
- **Package Type:** TO-220F (5-pin)  

### **Descriptions:**  
- The STR-A6251 is a high-efficiency switching regulator IC designed for offline power supplies.  
- It integrates a power MOSFET, PWM controller, and protection circuits.  
- Suitable for AC/DC converters in consumer electronics and industrial applications.  

### **Features:**  
- Built-in high-voltage startup circuit  
- Overcurrent protection (OCP)  
- Overvoltage protection (OVP)  
- Thermal shutdown protection  
- Auto-restart function for fault recovery  
- Low standby power consumption  

This information is based on SANKEN's official documentation for the STR-A6251.

Application Scenarios & Design Considerations

Universal-Input/15 W 50 kHz Flyback Switching Regulators

Alternative Part Number

  • TNY276PN --: Offline switcher IC in a DIP-8 package with integrated high-voltage MOSFET, commonly used as a functional substitute for STR-A series regulators in low-power AC-DC supplies.
  • VIPER22A --: Widely available offline PWM controller with integrated power MOSFET in DIP-8, suitable for replacing STR-A6251 in small flyback power supplies with minor circuit adjustment.
  • NCP1014AP065G --: Self-supplied monolithic switcher with integrated MOSFET in a DIP-8 package, offering comparable power range and a common alternative for STR-A series designs.
  • ICE3B0565 --: CoolSET offline flyback controller with integrated MOSFET, comparable power class and pin-compatible DIP-8 option for SMPS designs using the STR-A6251.

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