The SD6807D is a highly integrated off-line quasi-resonant flyback PWM power switch. It's designed by Silan Microelectronics for small power adapters and chargers. The IC combines a current-mode PWM controller and a high-voltage power MOSFET, which reduces external components and simplifies power supply design.

Applications:

• Power adapters for mobile phones
• Chargers for cordless phones and DECT phones
• Power supplies for small home appliances
• Standby power supplies
• LED lighting power supplies

Features:

• Integrated high-voltage power MOSFET
• Quasi-Resonant (QR) control for high efficiency
• Current-mode PWM control
• Low standby power consumption (<0.3W)
• Built-in overcurrent protection (OCP) with auto-recovery
• Overvoltage protection (OVP) with latch-off mode
• Overtemperature protection (OTP) with auto-recovery
• Short circuit protection (SCP) with auto-recovery
• Frequency jittering to reduce EMI
• Soft start function to minimize stress during startup

Benefits:

• Reduced BOM Cost: Integrating both the controller and MOSFET lowers the number of external components required, thereby reducing the bill of materials.
• High Efficiency: Quasi-resonant operation and current-mode control improve efficiency and minimize power loss.
• Enhanced Reliability: Built-in protection features safeguard against overcurrent, overvoltage, overtemperature, and short circuits, increasing the power supply's reliability.
• Low Standby Power: Complies with energy efficiency standards due to its low standby power consumption.
• Simplified Design Process: The highly integrated design makes power supply design easier and faster.

The quasi-resonant operation of the SD6807D allows for valley switching, which reduces switching losses and improves overall efficiency. The frequency jittering feature helps to spread the EMI spectrum, making it easier to meet EMI requirements. The device typically comes in a DIP-8 or SOP-8 package.

Typical Technical Specifications:

• Operating Voltage Range: 85VAC ~ 265VAC
• Output Power: up to 7W
• Switching Frequency: Automatically adjusted based on load and input voltage
• Standby Power Consumption: <0.3W
• Protection Functions: OCP, OVP, OTP, SCP
• Package Options: DIP-8, SOP-8