Motorola TDA1085C Universal Motor Speed Controller DIL16

The TDA1085C is a phase angle triac controller having all the necessary functions for universal motor speed control in washing machines. It operates in closed loop configuration and provides two ramp possibilities.

GENERAL DESCRIPTION

The TDA 1085C triggers a triac accordingly to the speed regulation requirements. Motor speed is digitally sensed by a tachogenerator and then converted into an analog voltage.

The speed set is externally fixed and is applied to the internal linear regulation input after having been submitted to programmable acceleration ramps. The overall result consists in a full motor speed range with two acceleration ramps which allow efficient washing machine control (Distribute function).

Additionally, the TDA 1085C protects the whole system against AC line stop or variations, overcurrent in the motor and tachogenerator failure.

Features

• On-Chip Frequency to Voltage Converter
• On-Chip Ramps Generator
• Soft-Start
• Load Current Limitation
• Tachogenerator Circuit Sensing
• Direct Supply from AC Line
• Security Functions Performed by Monitor