TDA1085C

Overview

The TDA1085C is a universal motor speed controller manufactured by onsemi, designed for phase angle triac control in washing machines. It operates in a closed-loop configuration with direct AC line supply capability. The device integrates an on-chip frequency-to-voltage converter and ramps generator. Key electrical specifications include a maximum operating supply voltage of 15.6 V and a minimum of 15 V. It supports an operating temperature range from -10°C to +120°C. The component is housed in a 16-pin PDIP package with dimensions of 19.55 x 6.85 x 3.43 mm.

Feature Summary

• Integrates on-chip frequency-to-voltage converter for tachogenerator circuit sensing
• Provides built-in soft-start and load current limitation functions
• Supports direct supply from the AC line without external rectification

Applications

• Universal motor speed control in washing machines
• Closed-loop motor speed regulation systems
• AC line powered appliance control circuits

Procurement Notes

Verify the specific manufacturer origin, as the TDA1085C was originally developed by Motorola/NXP and later acquired by onsemi. Confirm the package suffix (CG) corresponds to the PDIP variant. Ensure compliance documentation matches the production era. Check for RoHS exemption status if required for specific environmental regulations. Validate pinout compatibility with existing PCB layouts before procurement.

Selection Notes

Select this component when designing universal motor controllers requiring integrated ramp generation and frequency-to-voltage conversion. It is suitable for applications needing direct AC line operation and closed-loop speed regulation. Consider the wide operating temperature range for industrial or household appliance environments. Verify that the 16-pin PDIP package fits the mechanical constraints of the target design.

Part Context

The TDA1085C belongs to the family of universal motor speed controllers used primarily in white goods. Originally introduced by Motorola, the product line transitioned to onsemi following corporate acquisitions. It serves as a specialized IC for managing AC motor speeds in appliances like washing machines, replacing discrete solution designs with a single-chip implementation.

Replacement Considerations

TDA1085CD is available in an SO-16 plastic package offering equivalent functionality with a different form factor.