Product category:
Stand-Alone Instruments
News Release from: TTi (Thurlby Thandar Instruments) | Subject: LD300
Edited by the Electronicstalk Editorial
Team on 14 March 2005
Loads gain low-voltage dropout
The LD300 DC electronic load from TTi (Thurlby Thandar Instruments) has been enhanced by the addition of a low-voltage dropout facility.
The LD300 DC electronic load from TTi (Thurlby Thandar Instruments) has been enhanced by the addition of a low-voltage dropout facility This new feature is designed to protect sources such as batteries from damaging levels of discharge by reducing the load current towards zero when the source voltage falls below a user-defined dropout threshold
This article was originally published on Electronicstalk on 9 Feb 2004 at 8.00am (UK)
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The LD300 is a DC electronic load with maximum input levels of 80A and 80V, making it ideal for use in investigating the behaviour of many different types of DC power sources.
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The LD300 has maximum input levels of 80A and 80V, with a maximum power dissipation of 300W at 40C, and has very low internal resistance to allow operation at high currents with low voltage drop.
Operation down to 500mV is possible at currents up to 10A, rising to 1V at 40A and less than 2V at 80A.
There are five different operating modes: constant current, constant voltage, constant power, constant resistance and constant conductance.
The value of the chosen constant parameter is set by 10-turn controls on the front panel.
Alternatively, an external control voltage can also be used to set the level of the load.
Any desired waveform can be applied, allowing complex load conditions to be simulated.
Load conditions are displayed using high-accuracy four-digit meters.
The voltage of the source can be sensed either internally for convenience or externally for better accuracy.
A current monitor output provides a voltage proportional to the current flowing, allowing the behaviour of a source to be viewed on an oscilloscope or external meter.
An internal transient generator can repeatedly switch the load between two different operating levels set on separate 10-turn controls.
The frequency and duty cycle of the transients can be set over a wide range.
The transients can also be initiated by an external logic signal.
The transitions between the levels have a true linear slewing characteristic in all modes; the slew-rate is adjustable over a wide range.
The LD300 is fully protected against excessive current, power dissipation or internal temperature, and minimises audible noise by automatically controlling the fan speed according to the power dissipation.
The unit is housed in a compact case measuring 130 x 212 x 435mm (half rack width, 3U height) with a weight of 6kg.
The LD300 costs GBP 695 (plus VAT) in the UK.
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