The IW1691-09 is a highly integrated AC/DC power conversion controller from Dialog Semiconductor. It's designed for off-line power supplies, providing high efficiency and compact size for applications like chargers and adapters. This device integrates multiple functions, including a primary-side controller and secondary-side synchronous rectification driver, to minimize external component count and simplify the power supply design.

Applications:

• Smartphone and tablet chargers.
• AC/DC adapters for various electronic devices.
• Standby power supplies for consumer electronics.
• Auxiliary power supplies in industrial equipment.
• LED lighting power supplies.

Features:

• Primary-side regulation (PSR): Eliminates the need for optocoupler feedback, reducing component count and improving reliability.
• Secondary-side synchronous rectification (SR) driver: Enhances efficiency by minimizing conduction losses in the secondary rectifier.
• Constant voltage (CV) and constant current (CC) control: Provides accurate voltage and current regulation for battery charging applications.
• Low standby power consumption: Meets stringent energy efficiency standards.
• Multiple protection features: Includes overvoltage protection (OVP), overcurrent protection (OCP), and overtemperature protection (OTP).
• Adaptive multi-mode control: Optimizes efficiency across a wide load range.
• Frequency jittering: Reduces EMI (electromagnetic interference).

Benefits:

• High efficiency: Minimizes energy waste and reduces heat generation.
• Compact size: Reduces the overall size of the power supply.
• Simplified design: Integrated functionality reduces component count and simplifies the design process.
• Improved reliability: Built-in protection features enhance system reliability.
• Lower cost: Reduced component count and simplified design lower the overall cost of the power supply.

Additional Details:

The IW1691-09 typically operates with a wide input voltage range (e.g., 85VAC to 265VAC). It offers a high level of integration, reducing the need for external components and minimizing the BOM (Bill of Materials) cost. The adaptive multi-mode control ensures optimal efficiency across a wide load range, making it suitable for various applications. The frequency jittering feature helps to reduce EMI, simplifying the compliance with regulatory requirements. The device is typically available in a small form factor package, further contributing to the compact size of the power supply.