Onsemi NCP1014

Description

The NCP101X series integrates a fixed-frequency current-mode controller and a 700 V voltage MOSFET. Housed in a PDIP7 package, the NCP101X offers everything needed to build a rugged and low-cost power supply, including soft-start, frequency jittering, short-circuit protection, skip-cycle, a maximum peak current setpoint and a Dynamic Self-Supply (no need for an auxiliary winding).Unlike other monolithic solutions, the NCP101X is quiet by nature: during nominal load operation, the part switches at one of the available frequencies (65-100-130 kHz). When the current setpoint falls below a given value, e.g. the output power demand diminishes, the IC automatically enters the so-called skip cycle mode and provides excellent efficiency at light loads. Because this occurs at typically 1/4 of the maximum peak value, no acoustic noise takes place. As a result, standby power is reduced to the minimum without acoustic noise generation.

Features

• Built−in 700 V MOSFET with Typical RDSon of 11 and 22 
• Large Creepage Distance Between High−Voltage Pins
• 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
• These are Pb−Free and Halide−Free Devices

Typical applications

• Auxiliary Power Supplies (USB, Appliances,TVs, etc.)
• Low Power AC/DC Adapters for Chargers

More information

• Datasheet
• IC product information