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GDU 9X-XXXXX

Features: A range of Gate Drive Units (GDU) is available to control Dynex Semiconductor Gate Turn-Off Thyristors (GTO). These units provide the recommended waveforms for reliable switching of GTOs and have the following features:-· Input signal to the GDU (to turn the GDU ON and OFF) or output sig...

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GDU 9X-XXXXX: Features: A range of Gate Drive Units (GDU) is available to control Dynex Semiconductor Gate Turn-Off Thyristors (GTO). These units provide the recommended waveforms for reliable switching of GTOs a...

GDU 9X-XXXXX Data Sheet

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Part Number:
GDU 9X-XXXXX
Supply Ability:
5000

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Description



Features:

A range of Gate Drive Units (GDU) is available to control Dynex Semiconductor Gate Turn-Off Thyristors (GTO). These units provide the recommended waveforms for reliable switching of GTOs and have the following features:-
· Input signal to the GDU (to turn the GDU ON and OFF) or output signal (that indicates the presence of GTO gate to cathode negative voltage) can be specified for either opto-couplers or fibre optics.
· An output signal that monitors the GTO gate to cathode negative voltage. This voltage is monitored at the GDU GTO gate output connections or the GTO gate sense leads if they are wired to the GDU.
· At initial switch-on a safe start up is achieved by incorporating an inhibit of GTO gate pulses until the power supplies stabilise.
· Each power supply voltage is continuously monitored, if it falls below a preset level an OFF signal is sent to the GTO and further ON pulses are inhibited until the power supply recovers.
·Adjustable inhibit of short ON pulses. This prevents the GTO switching ON from signals that may be false.
· Adjustable minimum ON pulse width. This ensures that when the GTO is turned ON it is ON for a time that fully discharges the snubber capacitor.
· Adjustable minimum OFF pulse width. This ensures that the GTO is turned OFF for longer than its' turn-off time.


Description

This application note of GDU 9X-XXXXX should be used in conjunction with individual Gate Drive Unit datasheets which contain electrical, timing and outline information.




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