Description:

The NTE7109 is a primary switching regulator controller in a 16–Lead DIP type package designed to get the regulated DC voltage from an AC power supply. This device can directly drive a MOSFET with fast rise and fall output pulses.

The NTE7109 contains not only a high frequency OSC and fast output drive, but also a current limiter with fast response and high sensibility so a true “fast switching regulator” can be realized. By adding additional compenents to the primary side, a timer–type protection circuit can be made for protection against short–circuit and overcurrent.

Features:

● 500kHz Operation to MOSFET

? Output Current: ±2A

? Output Rise Time: 60ns; Fall Time: 40ns

? Modified Totem–Pole Output Method with Low Through Current

● Compact and Light–Weight Power Supply

? Low Start–Up Current: 90μA Typ.

? Wide Range Between “Start–Up Voltage” and “Stop Voltage” make the Power Input Smooting Capacitor Low; Start–Up Threshold Voltage: 16V; Stop Voltage: 10V

? High Power Dissipation Package withstands the Heat Generated bt the Gate–Drive Current of a MOSFET

● Simplified Peripheral Circuit with Protection Circuit and Built–In Large–Capacity Totem–Pole Output

? High–Speed Current Limiting Circuit using Pulse–by–Pulse Method (Two Systems of CLM+pin, CLM–pin)

? Protection by Intermittent Operation of Output Overcurrent: Timer Protection Circuit

? Overvoltage Protection Circuit with an Externally Resettable Latch (OVP)

? Protection Circuit for Output Miss Action at Low Supply Voltage (UVLO)

● High–Performance and Highly Functional Power Supply

? Triangular Wave Oscillator for Easy Dead Time Setting

Applications:

? Feed Forward Regulator

? Flyback Regulator