SKHI 10/12R Sindopower / Semikron, SKHI 10/12R Datasheet - Page 3

• Manufacturer Part Number: SKHI 10/12R
• Description: High Power IGBT Driver PCB
• Manufacturer: Sindopower / Semikron

Specifications of SKHI 10/12R

• Lead Free Status / Rohs Status: RoHS Compliant part Electrostatic Device

SEMIDRIVER
SEMIDRIVER
High Power Single IGBT Driver
General
The intelligent single IGBT driver, SKHI10 respectively
SKHI 10/17 is a standard driver for all power IGBTs on
the market.
The high power output capability was designed to switch
high current modules or several paralleled IGBTs even for
high frequency applications. The output buffer has been
improved to make it possible to switch up to 400A IGBT
modules at frequencies up to 20kHz.
A new function has been added to the short circuit
protection circuitry (Soft Turn Off), this automatically
increases the IGBT turn off time and hence reduces the
DC voltage overvoltage spikes, enabling the use of higher
DC-bus voltages. This means an increase in the final
output power. An integrated DC/DC converter with high
galvanic isolation (4 kV) ensures that the user is
protected from the high voltage (secondary side).
The power supplies for the driver may be the same as
used in the control board (0/+15V) without the
requirement of isolation. All information that is transmitted
between input and output uses ferrite transformers,
resulting in high dv/dt immunity (75kV/ s).
The driver input stage is connected directly to the control
board output and due to different control board operating
voltages the SKHI10’s input circuit includes a user voltage
level selector (+15V or +5V).
In the following only the designation SKHI 10 is used.
This is valid for both driver versions. If something is to be
explained special to SKHI 10/17 it will be descriped by
marking SKHI 10/17.
A. Features and Configuration of the Driver
A short description is given below. For detailed
information, please refer to section B.
a) The SKHI10 has an INPUT LEVEL SELECTOR circuit
b) The ERROR MEMORY blocks the transmission of all
c) With a FERRITE TRANSFORMER the information
d) A high frequency DC/DC CONVERTER avoids the
3
which is adusted by J1 for two different levels. It is
present for CMOS (15V) level, but can be changed by
the user to HCMOS (5V) level by solder bridging the
pads marked J1 together. For long input cables, we do
not recommend the 5V level due to possible
disturbances emitted by the power side.
turn-on signals to the IGBT if either a short circuit or
malfunction of V
the external control board through an open collector
transistor.
between primary and secondary may flow in both
directions and high levels of dv/dt and isolation are
obtained.
requirement of external isolated power supplies to
obtain the necessary gate voltage. An isolated ferrite
transformer in half-bridge configuration supplies the
necessary power to the gate of the IGBT. With this
Driver Electronic – PCB Drivers
TM
TM
S
SKHI 10/17
is detected, and sends a signal to
SKHI 10
e) Short circuit protection is provided by measuring the
f) The OUTPUT BUFFER is responsible for providing the
Fig.1 shows a simplified block diagram of the SKHI10
driver.
understanding:
• Regulated +15V must be present between pins 8,9 (V
• Pin 5 (V
• The RESET input must be connected to 0V to enable
• To monitor the error signal, a pull-up resistor must be
B. Description of the Circuit Block Diagram
The circuit in Fig. 1 shows the input on the left and output
on the right (primary/secondary).
1. Input level circuit
This circuit was designed to accept two different logic
voltage levels. The standard level is +15V (factory
adjusted) intended for noisy environments or when long
connections (l > 50 cm) between the external control
circuit and SKHI10 are used, where noise immunity must
be considerate. For lower power, and short connections
between control and driver, the TTL-HCMOS level (+5V)
and 10,11 ( ); an input signal (ON or OFF command to
the IGBTs) from the control system is supplied to pin 2
(V
the collector of the IGBT to monitor V
tests without connecting the IGBT it must be connected
to pin 1 (E) to avoid ERROR signal and enable the
output signals to be measured.
the V
blocked.
provided between pin 3 (ERROR) and V
feature, we can use the same power supply used in
the external control circuit, even if we are using more
than one SKHI10, e.g. in H-bridge configurations.
collector-emitter voltage with a V
circuit. An additional circuit detects the short circuit
after a delay (determined by R
the turn off speed (adjusted by R
SOFT TURN-OFF under fault conditions is necessary
as it reduces the voltage overshoot and allows for a
faster turn off during normal operation.
correct current to the gate of the IGBT. If these signals
do not have sufficient power, the IGBT will not switch
properly, and additional losses or even the destruction
of the IGBT may occur. According to the application
(switching frequency and gate charge of the IGBT) the
equivalent value of R
to the optimum value. This can be done by putting
additional parallel resistors R
already on the board. If only one IGBT is to be used,
(instead of parallel connection) only one cable could
be connected between driver and gate by soldering
the two J2 areas together.
(Fig. 1)
in
) where HIGH=ON and LOW=OFF.
in
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