Linear Technology today launched its LT4180, a Virtual Remote Sense DC/DC controller that eliminates the wires required to compensate for voltage drops between the power supply and load. The LT4180 works by introducing a +5%/-5% modulated pulse to the power supply output and measuring the changes in voltage and current. From this figure, the device regulates the power supply to maintain the correct output. The modulated signal is removed by a bypass capacitor situated at the load.
The LT4180 can operate with any power supply topology and is effective with 3V to 50V input. As well as the sensing wires, the device eliminates the need for a second regulator circuit at the point of load for some applications. In applications such as halogen lighting where efficiancy can drop very quickly with a relatively low voltage drop, the LT4180 can pay for itself in a short period of time.
Linear expects the LT4180 to be incorporated into power supplies as an additional feature offered by manufacturers, and be used in applications such as instrumentation, battery charging, wall adaptors, notebook power, surveillance equipment and halogen lighting.
Linear claims this is an entirely new technology. What do our power experts, or any other members think of this announcement? Would you consider using the LT4180 in your new design? Do you need any more information? If so, I'll see if I can get someone from Linear to answer your questions