The NE5561/SE5561 is a control circuit for use in switched-mode power supplies. It contains an internal temperature- compensated supply, PWM, sawtooth oscillator, overcurrent sense latch, and output stage. The device is intended for low cost SMPS applications where extensive housekeeping functions are not required.

1. Micro-miniature (D) package
2. Pulse-width modulator
3. Current limiting (cycle-by-cycle)
4. Sawtooth generator
5. Stabilized power supply
6. Double pulse protection
7. Internal temperature-compensated reference