The SD6834 is a power switch IC manufactured by Silan Microelectronics, typically used in offline flyback converter applications. It integrates a power MOSFET and a controller, designed to create efficient and cost-effective power supplies.
Applications:
- Adapters for mobile phones and other portable devices
- Standby power supplies for TVs and set-top boxes
- Open-frame power supplies
- LED lighting power supplies
- Auxiliary power supplies
Features:
- Integrated high-voltage power MOSFET
- Current-mode PWM control
- Low startup current
- Low standby power consumption
- Overcurrent protection (OCP)
- Overvoltage protection (OVP)
- Overtemperature protection (OTP)
- Short circuit protection (SCP)
- Frequency jittering for improved EMI performance
- Soft start function
Benefits:
- Simplified Design: The integration of the MOSFET and controller reduces the number of external components needed, making the design process easier and faster.
- Cost-Effective: By reducing the BOM and simplifying the design, the SD6834 helps to lower the overall cost of the power supply.
- High Efficiency: Current-mode PWM control and other features optimize efficiency, reducing energy consumption and heat dissipation.
- Enhanced Reliability: The protection features (OCP, OVP, OTP, SCP) ensure reliable operation and protect the power supply from damage.
- Low Standby Power: The SD6834 is designed for low standby power consumption, meeting energy efficiency requirements.
The SD6834 typically operates in discontinuous conduction mode (DCM) or quasi-resonant mode (QR) to further enhance efficiency. The built-in frequency jittering feature helps to reduce EMI emissions, making it easier to meet regulatory requirements. The soft-start function minimizes stress on the power components during startup.
Typical Technical Specifications:
- Operating Voltage: 85VAC to 265VAC
- Switching Frequency: Typically around 65 kHz
- Standby Power: <0.3W
- Protection Features: OCP, OVP, OTP, SCP
- Package: DIP-8, SOP-8
