1ED020I12-F2 Datasheet, PDF (13/28 Pages) Infineon Technologies AG – Single IGBT Driver IC

4
Functional Description
EiceDRIVER™
1ED020I12-F2
Functional DescriptionIntroduction
4.1
Introduction
The 1ED020I12-F2 is an advanced IGBT dual 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 outputs 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 outputs.
Two READY status outputs reports if the device is supplied and operates correctly.
+5V
SGND
IN+
RDY
FLT
RST
10R
VCC1
100n
GND1
IN+
IN-
RDY
/FLT
/RST
VCC2
DESAT
CLAMP
OUT
NC
GND2
VEE 2
+15V
1µ
1k
10R
220p
1µ
-8V
Figure 4 Application Example Bipolar Supply
4.2
Supply
The driver 1ED020I12-F2 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 4. 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 5.
Final Data Sheet
13
Rev. 2.0, 2011-08-01