1ED020I12FA2 Datasheet, PDF (9/27 Pages) Infineon Technologies AG – Single IGBT Driver IC

1ED020I12FA2
Single IGBT Driver IC
Functional Description
4
Functional Description
4.1
Introduction
The 1ED020I12FA2 is an advanced IGBT gate driver that can be also used for driving power MOS devices.
Control and protection functions are included to make possible the design of high reliability systems.
The device consists of two galvanic separated parts. The input chip can be directly connected to a standard
5 V DSP or microcontroller with CMOS in/output and the output chip is connected to the high voltage side.
The rail-to-rail driver output enables the user to provide easy clamping of the IGBTs gate voltage during short
circuit of the IGBT. So an increase of short circuit current due to the feedback via the Miller capacitance can be
avoided. Further, a rail-to-rail output reduces power dissipation.
The device also includes IGBT desaturation protection with FAULT status output.
The READY status output reports if the device is supplied and operates correctly.
+5V
SGND
IN+
RDY
FLT
RST
VCC1
100n
GND1
IN+
IN-
RDY
/FLT
/RST
VCC2
DESAT
CLAMP
OUT
NC
GND2
VEE 2
+15V
1µ
1k
10R
220p
1µ
-8V
Figure 3 Application Example Bipolar Supply
4.2
Supply
The driver 1ED020I12FA2 is designed to support two different supply configurations, bipolar supply and
unipolar supply.
In bipolar supply the driver is typically supplied with a positive voltage of 15V at VCC2 and a negative voltage
of -8V at VEE2, please refer to Figure 3. Negative supply prevents a dynamic turn on due to the additional
charge which is generated from IGBT input capacitance times negative supply voltage. If an appropriate
negative supply voltage is used, connecting CLAMP to IGBT gate is redundant and therefore typically not
necessary.
For unipolar supply configuration the driver is typically supplied with a positive voltage of 15V at VCC2.
Erratically dynamic turn on of the IGBT could be prevented with active Miller clamp function, so CLAMP output
is directly connected to IGBT gate, please refer to Figure 4.
Data Sheet
9
Rev. 3.0
2016-04-04