Modulated Power Supply App Notes

Technical

Modulated Power Supply

TS200

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Modulated power supply served as function generator amplifier, battery simulator, LDO PSRR testing, coil driver, and piezo driver. Technical Info Download Contact

Instruments For Testing Your Innovations

Features

Applications

Battery Simulator

TS200 can source or sink current. It can be use as a battery simulator for testing battery chargers. The TS200 has a variable DC output that can easily simulate battery voltage changes. Thus it is great for battery charger testing such as those in battery operated portable electronic systems.


Related Application Note

Battery Simulator

Battery Emulator

Four Quadrant Power Supply

Magnetic Coil and Piezo Driver

Electromagnetic coils such as solenoids, inductors, Helmholtz coils, and electromagnets often time required high-current and high-frequency operation. The TS200 is ideal for driving magnetic coils at high current and high frequency. Similarly the TS200 is also ideal for driver high capacitance piezo actuators.


Related Application Notes

The TS200 Modulated Power Supply is a unique test equipment ideal for amplifying function generator output. It amplifies current or voltage or power for driving heavy loads. The TS200 output current up to 4A peak for the low-voltage model. The TS200-3B output is up to +70V.


Related Application Notes

Function Generator Amplifier

Helmholtz Coils Driver

High Current and Frequency Electromagnet Using Resonant

Magnetic Field Generator Uses New Resonant Circuit

Helmholtz Coil For Sale Listing

Hemoltz Coil Design Resources

Magnetic Design Main Page

Waveform Amplifier

High Current Amplifier

High Voltage Amplifier

Maximizing Output Current

Transient Response Tests

Transient response is an electrical specification of how a device-under-test (DUT) response to an input voltage disturbance or transient. For example, a regulator specified its output voltage deviates less than 5mV for a 200mV input voltage step from 3.2V to 3.4V in 10 microseconds. This is also called line step response. Another example is to simulate a supply voltage transient rapidly overshoot follow by a suddenly loss of power.


Related Application Note

  Line Transient Response Test

Four Quadrant Power Supply

TS200 is a four quadrant power supply, sometime referred to as bipolar power supply. It can output both positive and negative voltage and it can source and sink current up 4A. Four quadrant power supply is ideal for solar cell characterization.


Related Application Notes

  Four Quadrant Power Supply

Diagram showing all four quadrants operation voltage and current.

TS200 Voltage Ranges

Quick Links

Related Product

TS250

TS250 vs. TS200

TS200 Price List

TS200 Main Page

Technical Specifications

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TS200 is ideal for power supply rejection ratio or PSRR measurement. PSRR is commonly tested for LDO regulators, op amps, audio amps, etc. TS200 is especially powerful for LDO PSRR testing at high load current. TS200 can also test op amp PSRR and CMRR. Conventional regulator PSRR test techniques such as capacitor or inductor coupled unable to support high LDO load current (i.e. >1A). Various PSRR measurement techniques are outlined below links. The TS200 is designed to work with network analyzers such as Omicron Lab Bode 100, AP Instruments (Ridley) model 300, Agilent 4395A, and Audio Precision SYS2722.

PSRR

How to Measure LDO PSRR

How to Measure Op-Amp CMRR

Op-Amp PSRR Measurement is Easy

TS200-0A:  0dB Gain, -10V to + 10V

TS200-0B:  20dB Gain, -10V to + 10V

TS200-1A:  0dB Gain, -20V to + 20V

TS200-1B:  20dB Gain, -20V to + 20V

TS200-2A:  0dB Gain, -20V to + 45V

TS200-2B:  20dB Gain, -20V to + 45V

TS200-3A:  0dB Gain, -10V to + 70V

TS200-3B:  20dB Gain, -10V to + 70V

TS200-4A:  0dB Gain, 0V to + 15V

TS200-4B:  20dB Gain, 0V to + 15V

TS200-5A:  0dB Gain, -40V to + 40V

TS200-5B:  20dB Gain, -40V to + 40V

Datasheet

Related Application Notes

Detailed Application Information

Battery Simulator

TS200 modulated power supply can source or sink current. It can be use as a battery simulator. The TS200 has a variable DC output that can easily simulate battery voltage changes. Thus it is great for battery charger testing such as those in battery operated portable electronic systems.


A battery simulator is an electronic instrument that will simulate many actual battery electrical properties and characteristics. These battery characteristics are the ability to sink current, and able to provide power, current, and voltage. It supplies the needed current, power, and voltage to the mobile system just like a real battery can. Generally a battery simulator will replace the battery inside a portable system for testing purpose. The battery simulator empowers test engineers to easily and extensively test these portable devices. Thorough testing is needed both for product developments and final production.


Charger circuit that charges the battery is included in a lot of mobile systems. The charger circuit must be fully and methodically tested to be certain it meets all of the specifications and safely charges the battery. A typical charging cycle is from depleted battery to fully charge typically takes few hours to complete. Therefore it requires many hours to test a charging cycle. If the battery is replaced with a battery simulator, a complete charging cycle test can be done in just a few seconds. Similarly, it could take a couple of days to empty a real battery in a handheld system. On the other hand, a battery simulator can quickly emulate a depleted battery with a flip of a switch. While battery is simulated and "charging", engineers can monitor how the device and charger reacts as the “battery” is depleted. A battery simulator can test a system to make sure that it meets all of the specifications without having waiting for hours. Furthermore, a battery simulator can quickly simulate an overcharge battery or a completely deplete battery (low voltage), both of which conditions are hard to do with a real battery.


Medium-powered systems generally use several batteries connected in series for high voltage and power. These battery cells generally are utilizing cell balancing techniques to obtain the optimal battery capacity. The battery charger itself and the cell balance circuit have to be properly tested. Several battery simulators are necessary in order to properly and easily test the cell balancing circuitry. Every simulator emulates a battery cell. To stress test the battery-cell-balancing circuit, design engineers can emulate one or more battery cells are “out-of-balance”. For example test engineer can quickly emulate one of the cells has been over-charged and see how the active or passive balance circuit behaves. Likewise it's very straightforward to simulate one of the batteries is defective or worn (low voltage) and verify the cell balancing circuit is working correctly under such rear conditions. In summary, it is critical to test battery charger and cell balancing circuits by using a battery simulator.

Modulated power supply is being used as a battery simulator,