This circuit is from an American 80's documentation. The integrated circuit is from the time and the sensor consists of a smoke chamber measuring its transparency change.
This circuit makes use of the Linear Technology LT6100. We find it in a 2005 company manual. The...
August 2017 - TPS4H00EVM Power Module Modules for Texas Instruments High Power Positive Side...
This configuration enables the use of low current switches or sensors to control high power loads...