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