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Instruments For Testing Your Innovations
High voltage amplifier is an instrument that amplifies voltage signal. Its output voltage range is often greater than 10V and up to 100V or more. Often time input signal sources are less than 5V, but the load or device under test (DUT) needs higher voltage. Therefore a high voltage amp is needed. For example, in a voltage transient testing, the voltage waveform is often between 12V and more than 60V, but a waveform generator output is 5V maximum into 50 ohm. A voltage amp is needed to amplify the waveform generator’s voltage to produce the 60V needed to test the device under test.
As shown in Figure 2, using the setup in Figure 1, the function generator voltage is amplified to produce a 80Vpp (+/-
Figure 1. Waveform generator voltage is amplified to produce high voltage for the DUT.
Figure 2. TS250-
Figure 3. TS200-
The TS200 and TS250 are high voltage and high current amplifier bench test equipment. Unlike other amplifiers in the market, the TS200 and TS250 are also capable of output very high current. Table shows the amplifier output voltage and current range. The maximum current is specified at 90% of the maximum voltage and resistive load. For reactive load such as capacitive and inductive components (i.e. coil and piezo), the maximum peak current is de-
Further read on high voltage amplifer design
The TS200 and TS250 output current range is 1.4A to 6A, depends on the model number and voltage range. Use the Selection guide below for current output capability. For some measurement and testing applications even higher current is needed. It is possible to connect 2 or more TS200/TS250 voltage amplifiers in parallel. The Parallel connection is shown in Figure 4. The TS250 current output is proportional to the number of units connected. For example the output current can be double or triple. Using a small series resistor to isolated voltage amp from each other. Typically series resistance of 0.3Ω to 1.0Ω is used. Higher resistance may be used for higher output voltage amplifiers. The isolation resistors must be rated for the power dissipation.
Figure 4. Parallel two TS250 amps doubles the output current.