Description

The NCP1012ST130T3G is a monolithic offline switcher integrating a fixed-frequency current-mode controller with a 700V MOSFET. It is a cost-effective and rugged power solution ideal for low power AC/DC adapters, auxiliary power supplies, and chargers. The NCP1012ST130T3G features frequency jittering, short-circuit protection, skip-cycle operation, maximum peak current setpoint, dynamic self-supply, and soft-start. Also, the IC is quiet and generates no acoustic noise, offering excellent efficiency at light loads.

Specifications and features

• Built-in 700V MOSFET with Typical RDSon of 11 Ω and 22 Ω
• Current-Mode Fixed Frequency Operation: 65 kHz – 100 kHz -- 130 kHz
• Skip-Cycle Operation at Low Peak Currents Only: No Acoustic Noise!
• Dynamic Self-Supply, No Need for an Auxiliary Winding
• Internal 1.0 ms Soft-Start
• Latched Overvoltage Protection with Auxiliary Winding Operation
• Frequency Jittering for Better EMI Signature
• Auto-Recovery Internal Output Short-Circuit Protection
• Below 100 mW Standby Power if Auxiliary Winding is Used
• Internal Temperature Shutdown
• Direct Optocoupler Connection
• SPICE Models Available for Transient Analysis
• Pb-Free and Halide-Free Devices

Application Scenarios

The NCP1012ST130T3G is suitable for different application scenarios, including:

• Low power AC/DC adapters for chargers
• Auxiliary power supplies (USB, appliances, TVs, etc.)

Comparison

• The NCP1012ST130T3G has a built-in 700V MOSFET, reducing the need for external components and making it a cost-effective option.
• The IC is quiet and generates no acoustic noise, reducing standby power to the minimum without noise generation.
• The skip-cycle operation offers excellent efficiency at light loads.
• The NCP1012ST130T3G has a large creepage distance between high-voltage pins, improving safety.
• It has internal temperature shutdown and output short-circuit protection, enhancing reliability.

• The NCP1012ST130T3G has a fixed-frequency current-mode controller, which limits its use in high-power applications.
• The IC is only suitable for low power AC/DC adapters and auxiliary power supplies, restricting its field of application.