Technical datasheet for the Melexis MLX90804 speed regulator IC, detailing features, electrical specs and protection functions.
The MLX90804 is a power‑control IC designed to regulate the speed of universal AC motors using a triac. It provides a true PI speed regulator, low power consumption, and built‑in overload and overspeed protection. Speed is set via a voltage on pin SET and measured with a coil or Hall sensor.
The document includes electrical specifications, functional block diagrams, mask‑programmable options, and application notes for hall‑sensor and coil‑sensor implementations. Contact information for Melexis worldwide is provided at the end of the sheet.
| Ambient temperature range | 0 °C to 85 °C |
|---|---|
| Maximum chip temperature | 150 °C |
| Thermal resistance (PDIP‑8) | 110 °C/W |
| Supply voltage (VDD1) typical | 16 V (internal zener limit) |
| Maximum source supply current (drivers off) | 10 mA |
It includes overload shutoff and overspeed shutoff functions that set the motor speed to 0 rpm when limits are exceeded.
When the drivers are off, the maximum source supply current is 10 mA.
It operates from 0 °C up to 85 °C ambient temperature, with a maximum chip temperature of 150 °C.