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Powerex, Inc., 200 Hillis Street, Youngwood, Pennsylvania 15697-1800 (724) 925-7272
M57160AL-01
Hybrid IC for IGBT Gate Driver
Operation of Protection Circuit
1. During a short circuit, high current causes the
F-Series IGBT module ’ s built in RTC to activate and
pull the gate voltage down. This reduction of gate
voltage is detected by pin 1 of the M57160AL-01.
If the gate voltage remains more than 3 volts below
Application Circuit Example
3.9 k
8
V CC for more than t trip , then a soft shutdown and
fault output signal are initiated by the M57160AL-01.
VIN
1
2
5
Ctrip
RG
2. When a short circuit is detected the M57160AL-01
output will remain latched in the low (off) state for
t timer , which is typically 1.5ms. After t timer has
expired an off state input command of at least 5 μ s
14
13
M57160AL-01 4
6
+
+
100 μ F
100 μ F
+
VCC
+
VEE
RTC
CIRCUIT
will unlatch the output and normal operation will
resume.
3. The t trip time can be extended by connecting
TTL, etc.
f = 20kHz
D.F. = 50%
VIN = 5V
VCC = 15V
VEE = 5V
RG = 2.1 ?
Ctrip = 0 ~ 47pF
external capacitance between pin 2 and pin 4 .
Precaution
1. The 3 , 7 , and 10 pins are for production test
4
Operation Flow on Detecting Short Circuit
START
DETECT THE SHORT CIRCUIT
GATE SIGNAL SHUT DOWN
TIMER START
FAULT SIGNAL OUTPUT
1~2 msec
NO
TIMER END
YES
NO
INPUT SIGNAL IS "L"
YES
RESET
Note: When the protection circuit is activated the output
voltage becomes – |VEE| + 2 Volts.
purposes only. Do not use these pins for any
connections.
2. The 100 μ F capacitors for power supply decoupling
must be located as close as possible to the
M57160AL-01.
3. If C trip is used it must be connected as close as
possible to pins 2 and 4 .
4. To avoid possible misoperation, the input signal
should be maintained in the off state during power
up/down.
5. If it is necessary or desirable to disable the short
circuit protection function this can be accomplished
by leaving pin 1 not connected.
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