The PN8122 is a high-performance, highly integrated PWM power switch designed for off-line flyback converter applications. It integrates a power MOSFET and a control circuit in a single package, offering features like high precision constant voltage/constant current (CV/CC) control, comprehensive protection, and high efficiency, making it ideal for chargers, adapters, and other small power supplies.

Applications

• Mobile Phone Chargers
• Tablet Chargers
• LED Lighting Power Supplies
• Standby Power Supplies
• Small Power Adapters

Features

• Integrated Power MOSFET
• High Precision CV/CC Control
• Built-in Soft Start
• Frequency Jittering for EMI Reduction
• Over Voltage Protection (OVP)
• Over Current Protection (OCP)
• Short Circuit Protection (SCP)
• Over Temperature Protection (OTP)

Benefits

• Simplified Design: Reduces component count and simplifies power supply design.
• High Efficiency: Minimizes power loss and improves overall system efficiency.
• Reliable Operation: Comprehensive protection features ensure robust and safe operation.
• Compact Size: Enables miniaturization of power supply designs.
• Low EMI: Reduces electromagnetic interference, ensuring stable and reliable operation.

Additional Details

The PN8122 integrates a high-voltage power MOSFET with a sophisticated control circuit, enabling high efficiency and reliable performance in off-line flyback converter applications. The high precision CV/CC control ensures stable output voltage and current regulation, making it suitable for battery charging and other precision power applications. The built-in soft start feature reduces stress on the power MOSFET during startup, improving reliability and extending lifespan. Frequency jittering is employed to reduce electromagnetic interference (EMI), ensuring stable and reliable operation in sensitive electronic environments. The PN8122 incorporates comprehensive protection features, including over voltage protection (OVP), over current protection (OCP), short circuit protection (SCP), and over temperature protection (OTP), safeguarding the power supply and connected devices from damage. This device is commonly used in mobile phone chargers, tablet chargers, LED lighting power supplies, standby power supplies, and small power adapters, where high efficiency, reliability, and compact size are critical requirements. The input voltage range is typically 85-265VAC, and the output power capability is up to approximately 12W, depending on the specific application and operating conditions. The switching frequency is typically around 65kHz, and the device is available in a DIP-8 or SOP-8 package.