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STR-A6251M from SK

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STR-A6251M

Manufacturer: SK, SANKEN

Universal-Input/15 W 67 kHz Flyback Switching Regulator

Partnumber Manufacturer Quantity Availability
STR-A6251M,STRA6251M SK, SANKEN 7000 In Stock

Description and Introduction

Universal-Input/15 W 67 kHz Flyback Switching Regulator The STR-A6251M is a power supply control IC manufactured by Sanken (SK). Here are the specifications, descriptions, and features based on the available knowledge:  

### **Specifications:**  
- **Input Voltage Range:** 85V to 265V AC  
- **Output Power:** Up to 15W (depending on design)  
- **Switching Frequency:** ~50kHz (fixed)  
- **Standby Power Consumption:** <100mW  
- **Operating Temperature Range:** -40°C to +105°C  
- **Package Type:** TO-92 (3-pin)  

### **Descriptions:**  
- The STR-A6251M is a high-voltage startup and control IC designed for offline switching power supplies.  
- It integrates a high-voltage MOSFET and PWM controller, reducing external component count.  
- Suitable for low-power applications such as adapters, chargers, and auxiliary power supplies.  

### **Features:**  
- **Built-in High-Voltage MOSFET:** Simplifies design by eliminating the need for an external switching transistor.  
- **Auto-Restart Protection:** Includes overcurrent, overvoltage, and thermal shutdown protection.  
- **Low Standby Power:** Optimized for energy-efficient applications.  
- **Fixed Frequency Operation:** Ensures stable switching performance.  
- **Soft-Start Function:** Reduces inrush current during startup.  

For detailed application notes or exact performance characteristics, refer to the official Sanken datasheet.

Application Scenarios & Design Considerations

Universal-Input/15 W 67 kHz Flyback Switching Regulator

Alternative Part Number

  • TNY276PN --: Offline flyback switcher in a DIP-8 package with integrated MOSFET, commonly used as a functional substitute for STR-A series regulators in low-power AC-DC supplies.
  • VIPER22A --: Widely available offline PWM switcher with integrated high-voltage MOSFET in DIP-8, frequently used to replace Sanken STR-A6xxx regulators in small power adapters.
  • NCP1014AP065G --: Self-supplied monolithic offline switcher in DIP-8 with integrated MOSFET and current-mode control, suitable as an alternative for low-wattage flyback designs using the STR-A6251M.
  • TNY267PN --: TinySwitch-III integrated offline switcher with comparable power range and built-in protection, suitable replacement for small flyback designs.
  • ICE2A265 --: CoolSET integrated power switch with 650V MOSFET, similar offline SMPS role and pin-compatible style for low-power adapters.

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