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Self-Supplied Monolithic Switcher for Low Standby-Power Offline SMPS w/out OVP
ON Semiconductor Corp
Description
The NCP1015 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 NCP1015 is quiet by nature: during nominal load operation, the part switches at one of the available frequencies (65-100 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 Ohms Large Creepage Distance between High-Voltage Pins Current-Mode Fixed Frequency Operation: 65kHz - 100kHz Skip-Cycle Operation at Low Peak Currents Only: No Acoustic Noise! Dynamic Self-Supply, No Need of 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 SPICE Models Available for Transient AC analysis
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