Offset Adjustment
one was placed there.
Current Limit Adjustment
Current limiting allows the user to set a maximum (peak) current that the amplifier will
provide to the load. The amplifier will provide current up the set current limit. Continuous
currents of 7 Amps are possible, while peak currents may reach 9 Amps. The current limit
is adjusted by means of a multi-turn potentiometer . The current limit setting is determined
by measuring the voltage present at the current limit output pin. The relationship for the
current limit setting and the current limit output is shown below.
Current limit adjustment is provided by means of a multi-turn potentiometer. Turning the
potentiometer clockwise increases the current limit setting, while turning it counter-
clockwise will decrease the current limit setting. The voltage at the Current Limit Output
(pins 6 and 7 on the User Connection Header) should be measured for accurate
determination of the maximum current setting. A meter can be connected to these two pins
to measure the current limit setting. The output signal varies between 0 and 5 volts. A
setting of 3.5 volts gives a current limit setting of 7 amps, the maximum rated output for the
amplifier. Instantaneous currents, or peak currents may go as high as 9 A, with the output
set to 5 volts.
The factory setting allows for maximum current to be delivered to the
load
.
28
Power Amplifier Module User's Guide
Equation 1. Current limit output voltage to current limit setting relationship.
Current Limit Setting
=
2
×
Current LimitOutputVoltage
