The AP3990S-HF is a primary-side regulation (PSR) PWM power switch IC from Advanced Power Electronics Corp. (APE). It is designed for offline flyback converter applications. The -HF suffix indicates that this component is Halogen-Free.

Applications:

• AC-DC adapters.
• Battery chargers.
• Standby power supplies.
• LED lighting.
• Small power supplies for consumer electronics.

Features:

• Primary-Side Regulation (PSR): Eliminates the need for secondary-side feedback circuitry.
• High Efficiency: Optimized for low power consumption.
• Built-in Protections: Includes over-voltage, over-current, and over-temperature protection.
• Low Start-up Current: Reduces power consumption during start-up.
• Frequency Jittering: Improves EMI performance.
• Halogen-Free: Environmentally friendly.
• RoHS Compliant: Complies with Restriction of Hazardous Substances directive.

Benefits:

• Simplified Design: PSR reduces component count and simplifies circuit design.
• Increased Efficiency: Optimized for low power consumption.
• Enhanced Reliability: Built-in protections ensure robust operation.
• Reduced EMI: Frequency jittering improves electromagnetic compatibility.
• Environmentally Friendly: Halogen-free construction.

Technical Specifications:

The AP3990S-HF is a PWM power switch IC operating in primary-side regulation. The datasheet provides detailed specifications, including input voltage range, output voltage regulation, switching frequency, and protection thresholds. The IC is available in a compact package suitable for small power supply designs. It is designed for high efficiency and reliability in various offline flyback converter applications. The typical operating temperature range can be found in the datasheet.