1ED020I12FTA_16 Datasheet, PDF (10/31 Pages) Infineon Technologies AG – Single IGBT Driver IC

1ED020I12FTA
Single IGBT Driver IC
Functional Description
4
Functional Description
4.1
Introduction
The 1ED020I12FTA is an advanced IGBT gate driver for motor drives typical greater 10 kW. 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.
An effective active Miller clamp function avoids the need of negative gate driving in some applications and
allows the use of a simple bootstrap supply for the high side driver.
A 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 an IGBT desaturation protection with a FAULT status output.
A two-level turn-off feature with adjustable delay protects against excessive overvoltage at turn-off in case of
overcurrent or short circuit condition. The same delay is applied at turn-on to prevent pulse width distortion.
A READY status output 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
TLSET
GND2
VEE 2
1ED020I12FTA
Figure 4-1 Application Example Bipolar Supply
+15V
1µ
1k
10R
10V 47p 220p
1µ
-8V
4.2
Supply
The driver 1ED020I12FTA 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, refer to Figure 4-1. 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 CLAMPxx 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, refer to Figure 4-2.
Data Sheet
10
Rev. 3.0
2016-04-05