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MIG20J501L Datasheet(PDF) 9 Page - Toshiba Semiconductor

Part No. MIG20J501L
Description  MIG20J501L
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Maker  TOSHIBA [Toshiba Semiconductor]
Homepage  http://www.semicon.toshiba.co.jp/eng
Logo TOSHIBA - Toshiba Semiconductor

MIG20J501L Datasheet(HTML) 9 Page - Toshiba Semiconductor

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MIG20J501L
2001-05-07
9
Timing Charts
Timing Chart for Short Current Protection Sequence (SC)
(1)
Upon occasion of short current condition, at first step, VGE is step-down to one-half of nominal value in
order to reduce IGBT saturation current and finally. VGE is completely interrupted after some certain time,
toff (OC).
(2)
An error signal output (VFO) goes into ‘L’ level when the lower arm IGBT is subjected to short current
condition. The timing of VFO output (‘L’ level) is provided at complete interruption of VGE and the ‘L’ level
is maintained during some certain time duration (tFO).
(3)
The reset operation is provided on condition that error signal output return to ‘H’ level after certain time
duration and over current condition is removed and input signal turns from operation “H” to “L”.
Timing Chart
(Only low side)
VIN
VGE
IC
VFO
toff (OC)
tFO
tFO
< toff (OC) Noise immunizing
time 2
ms
toff (OC)
H
L
0
0
0
SC
If these IPMs are accidentally shorted to ground and a 3-kHz carrier frequency is applied to them for
50 ms or more, they may be destroyed as a result. If short-circuit protection is enabled for the
upper-arm IPMs, no error signal will be output when shorting occurs. Thus, shorting to ground will
continue unabated for as long as the signal is input to the upper-arm IPMs from the microcontroller.


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