STR-W6251D

The STR-W6251D is a universal-input/100 W 65 kHz quasi-resonant flyback power supply controller IC developed by Sanken Electric Co., Ltd. It is designed to provide efficient and reliable power management solutions for various electronic devices.

Pinout

(Note: The pin configuration below is a general representation. Refer to the specific datasheet for precise details.)

• FB: Feedback pin for regulating output voltage
• VCC: Positive power supply
• GND: Ground connection
• SD: Shutdown pin for enabling/disabling the device
• CS: Current sense pin for monitoring load current
• PWM: Pulse-width modulation pin for controlling switching frequency
• DRV: Gate driver output for power switching transistor
• VIN: Input voltage connection

Circuit Diagram

Include a circuit diagram illustrating the connections and operation of the STR-W6251D IC for a visual representation.

Key Features

• Quasi-Resonant Operation: The STR-W6251D operates in quasi-resonant mode for improved efficiency and reduced EMI.
• Overload Protection: Incorporates protection features to safeguard the device under overload conditions.
• Soft Start Function: Includes a soft start function to prevent high inrush currents during power-up.
• Universal Input Voltage Range: Supports a wide range of input voltages, making it suitable for global applications.
• Integrated Protection Circuits: Features built-in protection circuits for overvoltage, overcurrent, and thermal protection.

Note: For detailed technical specifications, please refer to the STR-W6251D datasheet.

Application

• Switched-Mode Power Supplies: Ideal for use in flyback power supply designs for consumer electronic devices.
• LED Lighting: Suitable for driving LED lighting systems with its efficient power management capabilities.
• AC-DC Converters: Used in AC-DC converter applications requiring high efficiency and reliability.

Functionality

The STR-W6251D controller IC offers efficient and precise control over power supply systems, ensuring stable and regulated output voltages for various electronic applications.

Usage Guide

• Power Supply: Connect VIN (Pin 8) to the input voltage source and VCC (Pin 2) to the positive supply.
• Feedback Loop: Connect the FB pin (Pin 1) to the feedback network for output voltage regulation.
• Shutdown Control: Use the SD pin (Pin 4) to enable or disable the device as needed.

Frequently Asked Questions

Q: What is the maximum output power supported by the STR-W6251D?
A: The STR-W6251D is designed to support a maximum output power of 100 W.

Q: Can the STR-W6251D be used in high-frequency applications?
A: Yes, the STR-W6251D operates at a switching frequency of 65 kHz, making it suitable for high-frequency power supply designs.