Fuji Electric IGBT-IPM X Series, Руководство по применению

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MT6M15962a © Fuji Electric Co., Ltd. All rights reserved.
• The protection is not activated regardless of whether the
V
in
signal is ON/OFF-state if the period
during which V
CC
is lower than V
UV
is shorter than
20μs. (5)
• The alarm signal is output about 20μs after
V
CC
drops below V
UV
.
While V
in
is in ON, the alarm
signal is output about 20μs after
V
CC
drops below V
UV
, and the IGBT is
turned off softly
※
1
. (6)
• In case
V
in
remains ON, the alarm signal is output for the t
ALM(UV)
period, but the protection function
continues operating after that.
When V
in
is in OFF, normal operation is resumed. (7)
• During
V
CC
shut off, the alarm signal is output when V
CC
drops below V
UV
.(8)
• Even if the protection operating duration is sufficiently longer than
t
ALM(UV)
, the alarm signal is output
only once.
※
1 Soft turn off : This means a slower than normal turn-off.
3-13
5.1.2 Operation when V
in
is Low (ON) and V
CC
is shut off. (operation (5)~(8))
Protection operation recovery (4) ~ V
CC
power off period.
Fig. 3-7 UV protection operation ((5)~(8))
V
CC
: Supply voltage of pre-driver V
UV
: Under voltage protection level
V
H
: Under voltage protection hysteresis V
in
: Input signal voltage
V
ALM
: Alarm signal voltage t
ALM(UV)
: Alarm signal hold time
Protected
operation