NE/SE5560 is a control circuit for use in switched-mode power supplies. This single monolithic chip incorporates all the control and housekeeping (protection) functions required in switched-mode power supplies, including an internal temperature-compensated reference source, internal Zener references, sawtooth generator, pulse-width modulator, output stage and various protection circuits.
The NE/SE5560 is a monolithic control circuit for switched‑mode power supplies. It integrates a temperature‑compensated reference, sawtooth generator, pulse‑width modulator, output stage and multiple protection functions such as over‑voltage, current limiting and loop‑fault protection.
The document lists electrical characteristics (e.g., 12 V supply, 40 mA output current, 3.72 V reference), pin assignments, absolute maximum ratings and typical performance curves, enabling designers to implement voltage‑ or current‑driven operation with optional remote on/off and feed‑forward control.
| Supply voltage (Voc) | 12 V |
|---|---|
| Output current (Pin 15) | 40 mA |
| Reference voltage | 3.72 V (typical) |
| Operating temperature range | -55 °C to +125 °C |
| Current consumption at 12 V | < 10 mA |
| Maximum duty cycle | 95 % |
The internal reference voltage is typically 3.72 V.
It operates from –55 °C up to +125 °C.
The PWM can produce a duty cycle up to 95 %.
The IC can be powered from a DC source between 10.5 V and 18 V.