Product category:
Sensors and Data Acquisition
News Release from: Datel (UK) | Subject: DTL22A
Edited by the Electronicstalk Editorial
Team on 29 June 2001
Easy-to-use voltage-controlled
electronic load
Datel's DTL22A is the first in a series of easy-to-use voltage-controlled electronic loads.
Datel's DTL22A is the first in a series of easy-to-use voltage-controlled electronic loads The DTL22A's 0-20A output is straightforwardly controlled by applying 0-10V inputs generated by circuits as simple as the wiper of a trimpot or as sophisticated as analogue feedback loops, programmable logic controllers (PLCs), analogue-output computer I/O boards (D/A boards) etc
This article was originally published on Electronicstalk on 10 May 2001 at 8.00am (UK)
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The DTL22A is a near-ideal (output impedance greater than 10Mohm), voltage-controlled current sink.
Vin = 0V forces Iout = 0A; Vin = 10V forces Iout =20A, independent of load voltage.
The DTL22A supports any combination of Iout = 0-20A and Vout = 2.5-50V up to a total of 100W.
Historically, programmable electronic loads, with their assorted dials, knobs and displays, have been too expensive and bulky for widespead use, especially in multi-socket, test or burn-in racks.
Even fixed resistor loads, through certainly cheaper cannot be "reprogrammed" and require a different bank of resistors for each DUT (device under test).
DTL22A electronic loads provide 500V of isolation between the analogue input and any output; between the I/Os and the 5V supply, and between any pin and the metal case.
DTLs are fast (200us full scale step response; 5kHz update rates), accurate (+5mA max offset error, +1% absolute accuracy under any conditions), and feature a 2.5 to 50V output compliance voltage.
Units will not operate properly if DUT does not maintain this voltage range.
An internal monitor circuits checks for sufficient voltage before providing bias to the DTL22A's output stage.
The output "fault" line goes active, turning off the device, whenever the load fails to maintain the 2.5V minimum.
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