The 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.
This document describes the NE/SE5560 control circuit for switched‑mode power supplies. It includes a description of the integrated functions such as temperature‑compensated reference, sawtooth generator, pulse‑width modulator, and various protection circuits.
Technical sections provide pin configuration, absolute maximum ratings, DC electrical characteristics, typical performance graphs, and theory of operation. The datasheet also contains ordering information, package options, and application notes for voltage‑ or current‑driven operation.
| Supply voltage (voltage‑forced mode) | +18 V |
|---|---|
| Current‑fed mode limit | 30 mA |
| Maximum duty cycle | 95 % |
| Current consumption at 12 V | <10 mA |
The pulse‑width modulator can produce a duty cycle up to 95 %.
It can be powered from a DC source between 10.5 V and 18 V in voltage‑forced mode, or be current‑driven.
Less than 10 mA.