mini size tape wound toroidal cores for closed loop hall effect current sensor

Toroidal Core
Low noise
The core of toroidal transformer has no air gap, so there will be less induced shaking noise. And copper wires embrace the core tightly, which effectively reduced the hum noise.
Low-temperature rise
Toroidal transformer has high efficiency. The core loss of toroidal transformer is low. The windings, which worked on a low-temperature core, can obtain effective heat radiation.