NCP1015ST65T3G

The NCP1015 offers a complete current−mode control solution (actually an enhanced NCP1200 controller section) together with a high−voltage power MOSFET in a monolithic structure. The component integrates everything needed to build a rugged and low−cost Switch−Mode Power Supply (SMPS) featuring low standby power. - No need for an auxiliary winding: ON Semiconductor Very High Voltage Integrated Circuit technology lets you supply the IC directly from the high−voltage dc rail. We call it Dynamic Self−Supply (DSS). This solution simplifies the transformer design and ensures a better control of the SMPS in difficult output conditions, e.g. constant current operations. However, for improved standby performance, an auxiliary winding can be connected to the VCC pin to disable the DSS operation. - Short−circuit protection: by permanently monitoring the feedback line activity, the IC is able to detect the presence short−circuit, immediately reducing the output power for a total system protection. Once the short has disappeared, the controller resumes and goes back to normal operation. - Low standby−power: If SMPS naturally exhibit a good efficiency at nominal load, they begin to be less efficient when the output power demand diminishes. By skipping un−needed switching cycles, the NCP1015 drastically reduces the power wasted during light load conditions. An auxiliary winding can further help decreasing the standby power to extremely low levels by invalidating the DSS operation. Typical measurements show results below 80 mW at 230 Vac for a typical 7 W universal power supply. - No acoustic noise while operating: Instead of skipping cycles at high peak currents, the NCP1015 waits until the peak current demand falls below a fixed 0.25 of the maximum limit

Applications

• Low Power ac−dc Adapters for Chargers
• Auxiliary Power Supplies (USB, Appliances, TVs, etc.)

Key features

• Built−in 700 V MOSFET with typical RDS(on) of 11 Ω
• Large Creepage Distance between High−voltage Pins
• Current−mode Fixed Frequency Operation: 65 kHz - 100 kHz
• Skip−cycle Operation at Low Peak Currents Only: No Acoustic Noise!
• Dynamic Self−Supply, No Need for an Auxiliary Winding
• Internal 1 ms Soft−start
• Auto−recovery Internal Output Short−circuit Protection
• Frequency Jittering for Better EMI Signature
• Below 100 mW Standby Power if Auxiliary Winding is Used
• Internal Temperature Shutdown
• Direct Optocoupler Connection
• SPICE Models Available for TRANsient and AC Analysis
• This is a Pb−Free Device