1EDI10I12MF Datasheet, PDF (12/22 Pages) Infineon Technologies AG – Output with Clamp variant for IGBT

4
Functional Description
1EDI EiceDRIVER™ Compact
1EDIxxI12MF
Functional Description
4.1
Introduction
The Output with Clamp variant for IGBT is a general purpose IGBT gate driver. Basic control and protection
features support fast and easy design of highly reliable systems.
The integrated galvanic isolation between control input logic and driving output stage grants additional safety. Its
wide input voltage supply range support the direct connection of various signal sources like DSPs and
microcontrollers.
With the rail-to-rail output and the additional active miller clamp, dynamic turn on due to Miller capacitances are
suppressed.
4.2
Supply
The driver can operate over a wide supply voltage range.
The typical positive supply voltage for the configuration in Figure 4 is 15V at VCC2. Erratical dynamic turn on of
the IGBT can be prevented with the active Miller clamp function, in which the CLAMP output is directly connected
to the IGBT gate.
+5V
SGND
IN
VCC1
100 n
GND1
IN+
IN-
VCC2
OUT
CLAMP
GND2
+15V
1µ
10R
Figure 4 Application Example
4.3
Protection Features
4.3.1 Undervoltage Lockout (UVLO)
To ensure correct switching of IGBTs the device is equipped with an undervoltage lockout for input and output
independently. Operation starts only after both VCC levels have increased beyond the respective V_UVLOH levels
(see also Figure 7).
If the power supply voltage V_VCC1 of the input chip drops below V_UVLOL1 a turn-off signal is sent to the output chip
before power-down. The IGBT is switched off and the signals at IN+ and IN- are ignored until V_VCC1 reaches the
power-up voltage V_UVLOH1 again.
If the power supply voltage V_VCC2 of the output chip goes down below V_UVLOL2 the IGBT is switched off and signals
from the input chip are ignored until V_VCC2 reaches the power-up voltage V_UVLOH2 again.
4.3.2 Active Shut-Down
The active shut-down feature ensures a safe IGBT off-state if the output chip is not connected to the power supply,
IGBT gate is clamped at OUT and CLAMP to GND2.
Data Sheet
12
Rev. 2.0, 2014-11-10