The SD6861 is an offline power switch IC from Silan Microelectronics, designed for low-power AC/DC power supply applications. It integrates a high-voltage power MOSFET and a current-mode PWM controller to deliver a cost-effective and efficient solution. Its primary aim is to reduce standby power consumption and improve overall system reliability.

Applications:

• Power adapters for mobile devices and tablets
• Standby power supplies for consumer electronics (TVs, set-top boxes)
• LED lighting power supplies
• Chargers for various electronic devices
• Auxiliary power supplies

Features:

• Integrated high-voltage power MOSFET
• Current-mode PWM control with valley switching
• Low standby power consumption (<0.1W)
• Built-in overcurrent protection (OCP)
• Overvoltage protection (OVP)
• Overtemperature protection (OTP)
• Short circuit protection (SCP)
• Frequency jittering for enhanced EMI performance
• Soft-start function to reduce stress during startup

Benefits:

• Reduced Bill of Materials: High integration minimizes the need for external components, lowering overall system cost.
• High Efficiency: Current-mode PWM control and valley switching optimize efficiency and reduce power dissipation.
• Enhanced Reliability: Comprehensive protection features ensure robust operation and prevent damage to the power supply.
• Ultra-Low Standby Power: Meets stringent energy efficiency standards with its ultra-low standby power consumption.
• Simplified Design: The integrated MOSFET and controller simplify the design process and reduce development time.

The SD6861 utilizes a valley switching technique which improves efficiency by switching at the minimum voltage point of the MOSFET. The frequency jittering feature reduces EMI emissions, simplifying compliance with regulatory requirements. The soft-start function minimizes stress on the components during startup. Available in DIP-8 and SOP-8 packages.

Typical Technical Specifications:

• Operating Voltage: 85VAC to 265VAC
• Switching Frequency: 65kHz
• Standby Power: <0.1W
• Protection Features: OCP, OVP, OTP, SCP
• Package: DIP-8, SOP-8