描述 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.

特性 Features

? Built-in 700V MOSFET with Typical RdsON of 11 or 22 Ohms
? Large Creepage Distance between High-Voltage Pins
? Current- Mode Fixed Frequency Operation: 65kHz - 100kHz - 130kHz
? Skip-Cycle Operation at Low Peak Currents Only: No Acoustic Noise!
? Dynamic Self-Supply, No Need of an Auxiliary Winding
? Internal 1ms Soft-Start
? Auto-Recovery Internal Output Short-Circuit Protection
? Latched Overvoltage Protection with Auxiliary Winding Operation
? 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 AC analysis
? Pb-Free Packages are Available

應用 Application

? Auxiliary Power Supplies
? Low Power AC/DC Adapter for Chargers

簡介

NCP1012屬于集成電路（IC）的ACDC轉換器離線開關。由制造生產的NCP1012AC DC 轉換器，離線開關該系列是元器件級控制產品，用于構建將交流市電轉換為直流電（通常電壓大幅降低）的設備。集成和未集成系統(tǒng)主要開關元件的器件均包括在內。由于高輸入輸出電壓比，以及此類系統(tǒng)中通常需要隔離，這些器件通常與外部變壓器配合使用。盡管通常使用定制變壓器來實現此用途，但也有許多專門用于此用途的庫存產品，請參見“開關轉換器，SMPS 變壓器”標題。