M57161L-01 Powerex Inc, M57161L-01 Datasheet - Page 4

• Manufacturer Part Number: M57161L-01
• Description: HYBRID IC, IGBT DRIVER, 7A, 28-SIP (15 LEADS)
• Manufacturer: Powerex Inc

Specifications of M57161L-01

• Device Type: IGBT
• Peak Output Current: 7A
• Output Resistance: 2.2ohm
• Input Delay: 0.4µs
• Output Delay: 1.3µs
• Supply Voltage Range: 14.3V To 15.7V
• Driver Case Style: SIP
• No. Of Pins: 15
• Input Type: Non-Inverting
• Delay Time: 400ns
• Current - Peak: 7A
• Number Of Configurations: 1
• Number Of Outputs: 1
• High Side Voltage - Max (bootstrap): 1200V
• Voltage - Supply: 14.3 V ~ 15.7 V
• Operating Temperature: -20°C ~ 60°C
• Mounting Type: Through Hole
• Package / Case: 28-SIP (15 Leads)
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Configuration: -
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

1. Principle of Operation – RTC Detection and Short-Circuit Protection
RTC (Real Time Control) circuit. The purpose of the RTC is to limit
short-circuit current and maintain a 10µs short-circuit withstanding
capability. The RTC circuit limits the current by actively reducing the
gate voltage when excessive collector current is present. The M57161L-
01 gate driver uses a gate voltage detection circuit to sense the
activation of the RTC circuit inside the F-Series IGBT module.
simplified schematic of the RTC detector circuit is shown in Figure 1.
to the gate of the IGBT module and its (+) input supplied with a fixed
reference voltage of V
gate of the IGBT is nearly equal to the positive gate drive supply voltage, which exceeds V
comparator output low. In the normal OFF state, the gate voltage is nearly equal to the negative gate drive supply
voltage, which is less than V
the F-Series IGBT module will activate and pull the gate voltage down below the V
presence of a gate voltage less than V
that the module’s RTC has been activated. This condition is identified by a logical AND of
the gate driver’s control input signal and the comparator’s output as shown in Figure 1.
The output of the AND will go high when a short-circuit condition is detected. The output
of the AND is then used to command the IGBT to shut down in order to protect it from the
short circuit. A delay is provided after the comparators output to prevent the circuit from
indicating a short-circuit condition during the normal transition of gate voltage at turn-on.
2. Operation of the M57161L-01 RTC Detector
described above. A flow chart for the logical operation of the short-circuit protection is
shown in Figure 2. When the IGBT module’s RTC is activated the hybrid gate driver
performs a soft shut-down of the IGBT and starts a timed lock-out, t
The soft turn-off helps to limit the transient voltage that may be generated while
interrupting the short-circuit current flowing in the IGBT.
feedback signal is asserted and all input signals are ignored. Normal operation of the
driver will resume after the lock-out time has expired and the control input signal returns to
its off state.
it avoids the need for a high voltage detection diode, and reduces spacing requirements on
the gate drive printed circuit board. In addition, noise immunity is improved because the
driver is not connected to the high voltage on the IGBT’s collector.
3. Adjusting Protection Delay Time
approximately 3.5µs. This will prevent erroneous detection of short-circuit conditions as
long as the series gate resistance (R
module being used. The 3.5µs delay is appropriate for most applications so adjustment
will not be necessary. However, in some low frequency applications it may be desirable to
use a larger series gate resistance to slow the switching of the IGBT for reduced noise and
turn-off transient voltages. As the R
4
M57161L-01
Powerex, Inc., 200 E. Hillis Street, Youngwood, Pennsylvania 15697-1800 [phone]
Hybrid IC for IGBT Gate Driver
Powerex F-Series (trench gate) IGBT modules have a built-in
This circuit consists of a comparator with its (-) input connected
The Powerex M57161L-01 hybrid gate drive circuit implements RTC detection as
This protection scheme is superior to conventional desaturation detection because
The M57161L-01 has a default short-circuit detection time delay (t
SC
. In the normal ON state, the voltage on the
SC
making the comparator output high. If a short circuit occurs, the RTC circuit inside
G
is increased, the rise of gate voltage is slowed and in
G
) is near the minimum recommended value for the
SC
when the IGBT is supposed to be on indicates
During the lock-out a fault
timer
A
, typically 2.0ms.
Input
M57161L-01
AND
TRIP
Figure 1 RTC Detector
SC
DELAY
GATE
DRIVE
) of
reference. This abnormal
Shut-Down
COMPARE
Figure 2 Flow Chart
Slow Shut-down
Set Fault Signal
Disable Output
Enable Output
SC
Clear Fault
Signal OFF
R
Signal ON
V
Wait t
V
G
+
Is Input
Is Input
Signal
GE
GE
Delay
Start
and makes the
Is
< V
Is
< V
V
YES
timer
YES
SC
YES
YES
G
E
SC
SC
F-Series
IGBT
Module
RTC
Circuit
NO
NO
NO
NO
+
C
E