Fuji Electric IGBT-IPM X Series, Руководство по применению

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MT6M15962a
5. Timing chart
© Fuji Electric Co., Ltd. All rights reserved.
5.1 Control power supply under voltage protection (UV)
5.1.1 Operation when V
CC
is turned on and V
in
is High (OFF). (operation (1)~(4))
• During
V
CC
startup, an alarm signal is output when V
CC
exceeds 5V and becomes lower than V
UV
. (1)
The protection is not activated regardless of whether the V
in
signal is in ON/OFF state if the period
during which V
CC
is lower than V
UV
is shorter than
20μs. (2)
• The alarm signal is output about 20μs after
V
CC
drops below V
UV
.
While V
in
is OFF, the IGBT is kept in the OFF-state. (3)
• UV protection operation continues during the
t
ALM(UV)
period if V
CC
returns to V
UV
＋
V
H
before t
ALM(UV)
elapses. (3)~(4)
When V
in
is OFF, normal operation is resumed after t
ALM(UV)
has elapsed. (4)
• Even if the protection operating duration is sufficiently longer than
t
ALM(UV)
, the alarm signal is output
only once.
3-12
Fig. 3-6 UV protection operation ((1)~(4))
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