Catalog
High Voltage Switching Regulator for Offline SMPS
Key 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
Description
AI
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.
