CURRENT SWITCHING AMPLIFIER
23
CEDRAT TECHNOLOGIES
Current Switching Amplifier
18/12/2017
The driver is intrinsically bidirectional but not the internal power supply. Generally, the power supply is not
bidirectional and cannot return energy to the AC source. With large energy to recover, the need to use a
rheostat to dissipate this energy may be necessary.
Warning
If no braking resistor is connected and if the energy to recover is higher than the
internal energy recovery capability of the amplifier, the product may be destroyed.
8.3.4.Buffer capacitor extension
As the preceding equations showed, the stored energy needed may be very close to the energy stored in the
amplifier. In this case, it may be smarter to add a buffer capacitor extension rather than a rheostat as it would
be smaller and more efficient. Ask Cedrat Technologies if the calculated energy needed is larger than 3.5J.
