Current Mode Configuration
In order to set the gain of the amplifier, you need to select components D and A. These set
the forward gain such that the amplifier delivers G Amps/V.
The equation for the forward gain of the amplifier is
G
=
2
D
A
Table 3 shows recommended values
G – Amps / V
D – Ohms
A - Ohms
D / A
1
5000
10000
0.5
2
10000
10000
1
4
20000
10000
2
Table 3. Recommend values for the forward gain in current mode.
The bolded text shows the factory configuration.
Tuning the Amplifier
In current mode the amplifier must be tuned to the load inductance and resistance. This is
important to optimize its performance for the load.
The tuning components as configured at the factory are:
Component
Purpose
Value
Units
E
Integration gain capacitor
2.20E-008 Farads
B
Loop gain resistor
1000 Ohms
Table 4. Factory configuration of the integration components.
By changing the above components you can adjust the current loop proportional and
integral gains.
18
Power Amplifier Module User's Guide
