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AN4571

更新时间： 2024-11-13 23:30:31
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9页 121K
描述
GDU9X-XXXXX. for use with GTO gate drive units

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AN4571 数据手册

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GDU 9X-XXXXX Series  
GTO Gate Drive Units  
Application Note  
Replaces March 1998 version, AN4571 - 5.1  
AN4571-6.0 January 2000  
This application note should be used in conjunction with individual Gate Drive Unit datasheets which contain electrical, timing and outline  
information.  
GTO GATE DRIVE UNITS  
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.  
■ 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  
■AnoutputsignalthatmonitorstheGTOgatetocathodenegative  
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.  
switching ON from signals that may be false.  
■AdjustableminimumONpulsewidth.Thisensuresthatwhenthe  
GTO is turned ON it is ON for a time that fully discharges the  
snubber capacitor.  
■Atinitialswitch-onasafestartupisachievedbyincorporatingan  
inhibit of GTO gate pulses until the power supplies stabilise.  
■ Adjustable minimum OFF pulse width. This ensures that the  
GTO is turned OFF for longer than its' turn-off time.  
GTO/GATE DRIVE RECOMMENDATIONS  
Recommended Gate Drive Conditions  
GTO  
ITCM  
(A)  
IGQM QGQM  
(A) (µC) (A)  
IFG  
dIFG/dt  
(A/µs)  
IG(ON)  
(A)  
tw1(min)  
(µs)  
dIGQ/dt  
(A/µs)  
VRG(min)  
(V)  
VRG(max)  
(V)  
Recommended  
Gate Drive  
DGT304SE  
DG306AE  
DG406BP  
DG408BP  
700  
600  
120 700  
190 1300  
20  
20  
30  
30  
20  
20  
30  
30  
2
2
4
4
4.5  
10  
10  
20  
15  
15  
30  
30  
2
2
2
2
16  
16  
16  
16  
GDU 91-202XX  
GDU 91-202XX  
GDU 91-202XX  
GDU 91-202XX  
1000 420 3000  
1000 420 3000  
DGT409BCA 800  
350 3600  
30  
30  
30  
30  
4
7
20  
20  
30  
40  
2
2
15  
16  
GDU 91-202XX  
GDU 90-204XX  
DG646BH  
2000 650 6600  
2000 690 6000  
DG648BH  
DG758BX  
30  
30  
40  
40  
40  
40  
7
20  
10  
20  
20  
20  
40  
40  
40  
40  
40  
2
2
2
2
2
16  
16  
16  
16  
18  
GDU 90-204XX  
GDU 90-203XX  
GDU 90-207XX  
GDU 90-207XX  
GDU 90-207XX  
3000 830 10000 40  
8
DG856BW 3000 850 10500 40  
DG858BW 3000 850 12000 40  
DG858DW 3000 950 12500 40  
10  
10  
10  
1/9  
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