The SN51DPA is a highly integrated offline power switch with proprietary primary side control technology. It is designed for low power AC/DC charger applications.

Applications:

• Mobile phone chargers
• AC/DC adapters
• Standby power supplies
• Small power chargers

Features:

• Proprietary primary side regulation technology
• High precision constant voltage and constant current control
• Built-in 700V MOSFET
• Low start-up current
• Optimized dynamic response
• Built-in over voltage protection (OVP)
• Built-in short circuit protection (SCP)
• Built-in over temperature protection (OTP)

Benefits:

• Eliminates the need for secondary feedback components, reducing BOM cost
• High efficiency and low standby power consumption
• Enhanced system reliability with comprehensive protection features
• Simplified design and faster time-to-market

Additional Details:

The SN51DPA operates in Pulse Frequency Modulation (PFM) mode to achieve high efficiency and low standby power consumption. It integrates a high-voltage MOSFET and a current source for fast start-up. The device also features cycle-by-cycle current limiting for robust operation.