DC491A

DC491A is a demo board for the LTC1923 high efficiency thermoelectric cooler controller. This demonstration circuit features the LTC1923EUH thermoelectric cooler (TEC) controller. The LTC1923EUH comes in a small 32-lead QFN package (5mm by 5mm). Since the switching frequency of the circuit is 1MHz, small size inductors and capacitors are used as output filters. The main components are within a small assembly area about 0.75" by 0.5". DC491 provides a complete temperature control solution for TEC based temperature control of fibre-optic lasers. Laser temperature may be controlled at temperatures above or below ambient with set point stability typically well within 0.05°C over widely varying ambient temperature.

• 2.7 to 5.5V input voltage range

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