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Instruments For Testing Your Innovations

IIRVINE, California, April 20, 2015 – The TS250 waveform amplifier is a unique test equipment ideal for function generator amplifier. It amplifies current or voltage or power for driving high current loads such as Helmholtz coils and piezo elements.

The TS250 is ideal for many test and measurement applications such as LDO and amplifier PSRR tests, battery simulator, op-amp CMRR measurement, high current amplifier driver for Helmholtz coils, general signal generator amplifier, transient response test, four-quadrant power supply, lab power amplifier, and more. The TS250 offers eight voltage ranges to choose from ±10V to +65V. Refer to the datasheet for more information. The TS250 output peak current is up to 6A for the low-voltage model. Higher current is possible by connecting two or more TS250 in parallel.

Function Generator Amplifier

The TS250 is ideal as a function generator amplifier for amplifying current. It can drive high current or high power or high voltage loads. It can output up to 6A peak current for the low-voltage model and reduce current for the higher voltage models. As a high current amplifier, it accepts AC or DC voltage input from a function generator to drive a heavy load that requires high current or high voltage or both. The TS250 features a selectable gain of 0dB or 20dB. The TS250 served as the missing link between function generator and oscilloscope. It is also great for pulse amplifier and laboratory power amplifier.

Battery Simulator

The TS250 can source or sink current in all four quadrants. It is an excellent instrument for use as a battery simulator to test battery charger circuits. It provides a variable DC voltage output that can quickly simulates battery voltage changes. The TS250 features an LCD-display for current-monitor and eliminated the need for an external DMM.

A battery simulator is an electrical device that can simulate many of the battery characteristics. These characteristics are the capability to sink current, and able to deliver power, current, voltage and more. The battery simulator provides the required current, power, and voltage to the mobile system similar to an actual battery would. Usually a battery simulator will replace the battery inside a mobile device for testing purpose. The battery simulator allows design engineers to easily and thoroughly test these handheld systems. Extensive verification testing is needed during system design and mass production stage.

Charger circuit that charges the battery is included inside a lot of portable systems. The charger circuit must be fully and thoroughly tested to be certain it meets all of the specs and safely charges the battery. From dead battery to full, a charging cycle often will take several long hours to complete. Therefore it requires several hours to test just one charging cycle. Thorough testing requires many charging cycle tests. If the battery is replaced with a battery simulator, a complete charging cycle test can be done in mere seconds. Similarly, it could take a few days to empty an actual battery in a handheld system. On the other hand, a battery simulator can easily emulate an empty battery with a touch of button. At the same time, test engineers can monitor how the system and charger reacts as the “battery” is depleted. A battery simulator can test electronic charging device to make sure that it meets all of the specifications without waiting for hours. In addition, a battery simulator can quickly emulates an overcharge battery and a completely drained battery (0V), both of which conditions are difficult to do with an actual battery in a system.

Mid-power level electronic systems often use many series-connected battery cells to obtained higher voltage and delivery power more efficiently. These battery cells usually are utilizing cell balancing methods to get the optimum battery capacity. The battery charger itself plus the cell balancing circuit has to be correctly tested. A few battery simulators are necessary to be able to effectively and quickly test the cell balancing circuitry. Every battery simulator simulates an individual battery cell. In order to stress test the battery-cell-balancing circuit, test engineers can emulate one or more battery cells are “out-of-balance”. For example, designer can just emulate one of the cells has been overcharged and see how the balancing circuit behaves. In a similar fashion it is very easy to emulate one of the batteries is defective (zero volt) and verify the cell balancing circuit is operating properly. In short, it is critical to test battery charger and cell balancing circuits by utilizing a battery simulator.

PSRR/CMRR Measurement

TS250 is ideal for power supply rejection ratio or PSRR measurement. PSRR is commonly tested for LDO regulators, op amps, audio amps, and more. The TS250 is especially useful for LDO PSRR testing at high load current. Conventional regulator PSRR test techniques such as capacitor or inductor coupled unable to support high LDO load current (e.g. >1A). The TS250 can also test op-amp PSRR and CMRR.

In summary the TS250 is easy to use and intuited. It is designed for general laboratory applications such as function generator amplifier, battery simulator, Helmholtz coil driver, PSRR/CMRR testing, transient response testing, four-quadrant power supply, and piezoelectric amplifier.

About Accel Instruments

Accel instruments designs, develops, manufactures and markets electronic instruments for the specialized needs of electronics bench testing and research and development. We specialize in power electronic test and measurement such as voltage regulators, battery simulator, waveform amplifier, and more. Additional information about Accel instruments is available at

Accel Instruments Announces the TS250 Waveform Amplifier - An Instrument for Amplifying Function Generators


Waveform Amplifier

The TS250 is a high current waveform amplifier that can drive heavy loads such as Helmholtz coils and can be used as a battery simulator.

TS250-0:  -10V to + 10V

TS250-1:  -20V to + 20V

TS250-2:  -30V to + 30V

TS250-3:  -40V to + 40V

TS250-4:  -6V to + 15V

TS250-5:  -6V to + 30V

TS250-6:  -6V to + 45V

TS250-7:  -6V to + 65V

TS250 Voltage Ranges

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