Position: Index > Control Circuit >

Efficient switching controller

2015-03-01 20:57  
Declaration:We aim to transmit more information by carrying articles . We will delete it soon, if we are involved in the problems of article content ,copyright or other problems.

Switching controllers utilize external power MOSFETs to offer design engineers the flexibility to set output current levels and limits, that typically range from 5 A to 25 A per channel for synchronous designs. This high-performance switching controller for a low-power  servo motor uses a symmetrical complementary- transistor bridge. The bridge acts as a reversing switch between the motor and a single-ended power supply. Since the transistors operate either fully on or completely off, except during a very short transition period, much less heat is dissipated than in linear-amplifier circuits. Damping is provided by the circuit`s inherent dynamic braking.Since either maximum or zero voltage is applied to themotor, the dynamic response is faster than that of linear servo drives.TheLT3742is a dual step-down DC/DC switching regulator controller that drives high side N-channel power MOSFETs.