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1) $1 Solution for Fan control with the Z8 Encore! XP®

Refernce Design Features:

Low cost solution (less than $1) for controlling the speed of a fan/motor.
Design can be extended to other capacitor start, shaded pole, or universal motor of any polarity.
Wide range of speed from rated-RPM to zero.
Automatically detects frequency and hence can be used on 220V - 50Hz or 110V - 60Hz power system without change of hardware or software.
Speed control possible through 2-switches or through a potentiometer.
Exceptionally small size of PCB allows it to be integrated inside the motor as a single piece.
Over current protection can be implemented.
Low current requirement of the controller ensures lower power dissipation during working.
Applications: Exhaust fan control, Convection fan control, regulator for ceiling fan, etc

2) Intelligent Cooling Fan control with the Z8 Encore! XP®

Reference Design Features:

All-inclusive MCU features to support design for intelligent cooling fan control, minimizing the number of external components required.
Up to 8 channel, 10-bit sigma-delta ADC inputs for feedback selection such as overcurrent detection, speed input, temperature input, etc.
On-chip comparator for over-current detection.
General GPIO ports configure as inputs for hall sensor inputs.
General GPIO ports configure as outputs for commutation control.
2 enhanced 16-bit timer blocks featuring PWM capability.
On-chip IPO (5MHz/32kHz) requiring no external components.
Logic control for motor stall detection
On-chip temperature sensor allows temperature measurement of fan control circuit board.
Support commercial and industrial applications requiring one to multiple fan controllers.
Available in 8-, 20-, and 28-pin SOIC/QFN/PDIP/SSOP packages.

Reference designs are available to jump-start fan control design !!!

Following application notes are now available at www.zilog.com