PX200 V5 Manual
15
13/05/2022
15
Bridged Mode
In bridged mode, the load is connected between the outputs of two amplifiers, which doubles the
output voltage span and power. Grounded loads cannot be driven using bridged mode. Care should
be taken not to connect the negative side to ground accidentally, for example, by using a grounded
oscilloscope probe.
Figure 8 shows how two amplifiers are connected to a/-200V across a load. A +/-10V signal is
applied to both amplifiers, and the bottom amplifier is configured in inverting mode. The total voltage
across the load is +/-200V and the effective gain is twice the gain of a single amplifier. Common
bridged-mode configurations are listed in Table 7.
The current limits in bridge mode are identical to normal operation. The power bandwidth calculator
can also be used for predicting bridge-mode performance by entering the total voltage across the
load. For the example in Figure 8, the total peak-to-peak output voltage is 400V. When entering this
value to the calculator, an error will be shown since 400V is greater than the voltage span of a single
amplifier; however, the calculator output is remains valid.
Figure 8. Bridge mode configuration for obtaining
±
200V
Load Voltage
RMS Current
Non-Inverting Amp
Inverting Amp
±
200V
1.5 A
PX200-N100-P100
PX200-N100-P100
±
100V
3.1 A
PX200-N50-P50
PX200-N50-P50
0V to 200V
3.1 A
PX200-P100
PX200-N100
0V to 300V
2.1 A
PX200-P150
PX200-N150
0V to 400V
1.5 A
PX200-P200
PX200-N200
Table 7. Common bridge-mode configurations
10
-10
Signal
Generator
+
±
10V
±
100V
±
100V
±
200V
Non-inverting
Inverting
Voltage across load
PX200-N100-P100
PX200-N100-P100
