Thermo verification with TLK33 Peltier cells controller

by Andrea Cattaneo
TLK33 the Peltier cell controller

An application example of TLK33, with direct control of Peltier cells.

The customer was developing a thermo-verification system for access to workplaces and public premises and had to keep it at 35 °C (95 °F) when ambient temperature varies between 0 and 50 °C (32 to 122 °F).

As the ambient temperature changes, the system should be able to change thecontrol action type (heating or cooling).

In order not to limit the applicability and make installation easy, the system should be compact and lightweight.

The solution was found using a TLK33 regulator, a temperature probe (a PT100 in our case), a Peltier cell and a fan, (with external 24 V 5A power supply).

The required temperature precision was reached thanks to a particularly short time cycle and in addition the system offered several advantages:
- No maintenance
- Quiet and silent solution
- Vibration resistant
- No chemical elements (gas) are involved therefore it does not pollute during disposal.

This application is also described in a specific application note that you may download here

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